SOO >«STATI I EA UG iNG INCLUDING UG T

IMIT I G PHOSPHOR

FIELD

This disclosure elates to solidrstaie linear lighting _: arrangements including .light emitting phosp r and -photo3mniuesceue. e wavelength wnvmkm compopeats. More particularly, though not exclusively- embodiments of the invention, are directed to linear lighting arrangements- such as troffers, en ant lights, wraparound lights, under cabinet lights and task lights.

BACKGROUND

A common type of lighting apparatus is (be linear lighting arrangement, ia which the lighting apparatus typically has an elongated profile lamp with light emission along the length of the lamp, these linear lamps ^' are eonuuoniv used hi office, commercial industrial and domestic applications and ^' ineoj orate standard size linear lamps (such as standard (abu!ar T5 _> T8, and T12 to s),

A Linear lighting apparatus that is commonly used in office and. c mmerc al implications is a ceiling-recess or trotter that is mounted within a modular suspended (dropped.) ceiling. Oilier, linear lighting apparatus include suspended linear arrangements that can be direct only (downward: light emitting) or dlrect/iadiwi (lighting both me workspace in a downward direction aad the ceiling ia an upward direction for indirect lighting. -Surface mount linear fixtures, oiten called wraparound lights or wrap lights, ass used In both office, indust ial and domestic spaces, These are typically mounted directly to the surface of the ceiling or wall. Task lighting and under-cabinet iixnjres also common, use linear tubular lamps as the light source.

FIG. 1 shows an example of a traditional troffer 2 thai is often used to ho-use i¾¾>: seent tube lamps ia a modnfer suspended (dropped) celling. The interior of the rroifer body 4 includes lamp holders (connectors) on both lateral ends of the arrangement to receive linear fluorescent tubes 6. To achieve desired lighting performance, most trofifee are configured to receive several fluorescent tubes, since a single conventional tube by itself cannot usually provide enough light for typical applications. The trofier c n include a panel or door 8 to allow for insertion and replacement of the fluorescent tubes ί In addition, the paaei/door $ also rovide a location to include a dit&ser within, the lighting rr n e ent

While traditional fluorescent tube lite s, suspended linear, -wraparound lights and usder- cabinet lighting arrangements are very comBien and existin almost every commercial office bn iagj, there are .many disa an ages* associated -with, such lighting configurations. The conventional troi er configurations tend to be relatively complex, given the -num er of disparate components (e.g., iroSer housing, lamp connectors,, lamp driver, separate d ffuse^ doors/panels, tabes) that ami to be separatel .manufactured an then ^' integrated together in the lighting arrangement, in addition, since each, lamp (rube) e uires electrical connection to each end, cabling has tb be provided over a signsikant .portion of the volume of the. a ran ement returning greater and. more extensive safety-related sad ee,1iftc&tioa-relaiad remfbrcernenis to the lighting fixtute troffer, mcreasisg the size and weight of the arrangement Moreover. fluorescent tubes in the conventional iroff er suffer from spotty reliability and relatively inefficient lighting uniformity and performance. These problems therefore negatively affect me complexity, performance, weight, and/or cost to anyone feat seeks to m nufacture or install a linear light.

In addition, many disadvantages are so associated with, the use of conventional iluoreseent- based tube technology, which are gas discharge lamps thai use electricity to excite mercury vapors. for exasnple, the mercury within the fluorescent ¾m is potsosoas, sad breakage of ^• the tluoreseent lamp, particularly is ducts or air passages, may require expensive cleanup efibrts to reta ve the aw.reur (as recommended by the ^Envinasnsental Protection Agency in the USA), Moreover..Snoresee lamps can be quite costly to manufacture, due. la part to the requirement of using a ballast to regtdats the current in such lamps. In addition, fluorescent lamps have fairly high defects fates and relatively short operating lives.

As is evident, there is a. need for an improved approach to implement linear lighting arrangements ^' that add ess the drawbacks of the conventional linear lamps.

SUMMARY OF TOE INVENTION

.Embodiments of the invention, eoaeera an integrated lighting component and. an improved linear lighting arrangement,

Embodiments, of th present mventian pertain to linear lamps that utilise solid-state light sMitiing devices, typically LEDs (Light Emitting Diodes) in combination with as integrated ^' wavelength conversion component The solid-state-based linear temp of the present invention overcomes the problems associated with conventional fluorescent lamp fixtures. Unlike fluorescent lamps, soiid-siste-based linear lamps do not require any mercur . LEB-feased lamps are able to generate higher lumens per watt as compared to fluorescent lamps, while having lower defects rates and longer operating life expectancies. Some emb d m nts ertaiu to a laatp component, comprising a hollow ex ru ed e mp Ben^ where the hollow e?aruded component comprises a. phoiohnmneseence portion and a light shaping ροη οα, md where the phoioJuariaesceace portion xt ndi? inio an interior volume of tfee .hollow extmded consponeat _. and coroprises at least one phatolumaieseence material According to some embodij»«»ts of the invention, the inventive lighting a»a»gemfe»t iuehtdes aa tegtated wavelength conversion eojs oa that resides within a troffer frame (honsmg) _s where an. elongated substrate (e.g., circuit board) eomaiaing as arra of LEDs is iaseriable within (or adjacent to) the integrated wavelength, conversion eoaiponeot. The integrated wavelength conversion eoajponsat includes one or mo e phoiolnniinescence materials (e. .:. phosphor materials) which absorb a portion of the excitation, light emitted by the LEDs aad re-emit hgfat of a different color (waveleagth). Instead of i- a ag a separate diifhser to be individually souroed and ihea added to the snaagemeat, the integrated wavelength con e s on eoBi OBeni Includes a di Tuser portion that is integrally fo med Into the integrated eoBmonent

One embodiment of a lighting fixture comprises a light reSeerlve enclosure and an elongate solid-state light source located wit ia (he light reflective enclosure, whereis the elongate soliri-s& e light source caaaprises an eloagate array of solid-state light enn iers and m elongate hollow optical component having an. elongate wall defining an. interior volume, A first elongate portion of the wall has a length thai rojects iato the interior vokme aad has at least one paotolUminese ee nmteriaf a second elongate portion of the wall length oralis at least some light n a direction aw¾y from the light reflective enclosure with the second portion of the wall length substantially without a pi^toluaaneeceace material, and a third elongate portion of the wall !eagth emits at least s m light m a direction towards the light reflective enclosure, where the third portion -of the wall, length is substantially ithout a photohaninescence material

m some embodiments, an optica! component comprises a hollo elongate optical, component comprising an elongate wall defting an interior volume, wit tlse wall having a wall length, A first elongate portion of the wall lengt proj ects into the interior volume in a first direction and has at least one photolunrinesocncc material A second elongate portion of the wall Isflgfc -emits at least seme light in the first direction, with the second portion of the wall length substantially without a photok nioeseenee material. A third elongate portion of the wall length emits at least some light in a direction opposite to the first direction, with the second portion of the wall length substantially without a photolemineseence material, Another embodiment pertains to an optical component compriakg a hollow elongate optical com one t comprising a wall defining an interior volume, with fee wall aw n a all length. A first elongate por ion of the wall length projects into the bxfcerlor volume hi a .first direction and has at least one phololaniineseerice mai A-seedsd- elongate po t n, of the wall lengih emits at least some light in the first direction, with die second portion of the ws l length substantially withent a■ photomminescsnne. he optica! ^· coi»poa««t wall in this embodiment s a wall profile that is non-circular in s a e.

Some embod mests perta n to a lamp co onent comprising a hollow co-ex¾¾ ^' ded component, the hollow co-ex md d compone t having a portion, a

diflusor ort on and & top portion, where the photofia nnescenee portion, the diffnser ortion, and the top po tion are ail integrally ibrmed in the eo-ex†ruded component. The photolwBbreseenee portion extends into an interior vohime of the hollow co~extruded. component and comprises at least one photolu keseene-e material. The difmser portion, comprises dif&siag material and the top portion comprises an optically transparent, material. The combination of the photoiammese-moe portion md the top portion forms a chann l to receive a st sstrate having electrical components. Alternatively, the lamp component may me ade one or more rotrusio s o the top portion to receive a substrate having electrical components.

The combination of tire photolomineseenee portion, the diffuse*- portion, md the top portion integrally orm a single- walled structure having the interior VOinrae that is eloseabie by, for example, the application of end caps over the open ends of the lamp component The lamp component may mdu.de a dif!user portion that terms a rounded shape or a V-shape, The phofelimnnesceae© portion ean comprise a part elliptical., rounded (arcuate), or generally V- shape pr file.

Some embodimeat pertain to a linear lighting arrangement comprising a hollo co-extruded component, the hollow eo-extr ded c one t having a photolaminescence portion, a diffbser portion, and a top portion, where the photoknnineseence portion, the diiia er p rtion, ami the top portion are all integrall formed in. the hollow co-extruded component. The armngeimmt further includes a trotter body for receiving, the co-extruded component. The trolier body may not include electrical conduits, and the troSer body comprises a plastic and/or light-refleebve material. The diffuses- portion conpises diffusing material, for generating direct kmbsrika light emissions and the top portion comprises an optically transparent material for directing emitted light upwa ds to be reflected from the .roller body for indirect light emissions.

A method of fabricating ^' an optical component is provided. In s me embodiments, a elongated hollow body Is co-exir&dod ^' to include a phoiol ine^eerice portion, a diff portion nd a top porlion. The pbotohni«¼¾eenee p rtioa the dil¾er portion, and ft© top or i n, all integrally fenc d m the body, he & olummesceiKse po«io» projecting n an interior volume of the ee-e-ximded component and comprising at least ^' one pboto imiaeseeaee material, the difihser p rt on eotnpmkg diffiisiag material, an the top por i n comprising an optically ira»& ¾rea material. Multiple separate extruders are ej»plo sd to extrude ma erials of the photolnmineseenee portion, the diff ser potion, md the top portion. The materials operated upon by the extruders include at least one of Polycarbonate, PolyCsief yl methacrylate). Polyethylene Terephtfaalate, an thermoform plasties. Is some enmodiments, vacuum extrusion is performed to ex rude tbe optics! component.

Some ^■ em diiftOHts pertain to a lighting fixture comprising a linear solid-state light soeree or army of sources mi a substrate located with n -an interior of the fixture, a linear beat sink adjacent to the substrate having the linear light source, a tubular optical element that is greater tbaa two inches in width that integrally includes a diffuses- surface substantially lacing in fee direction of light emission, wherein the tabular optical dement is linear in shape and is attached to the linear light source, the linear light source combined with ^" the tubular optical element provides light emissions in both ^' the upward and downward directions., and a single walled molded troi&r body formed of a non-ferrous material and being light reflective, wherein the trofier body is reflective and the tutelar optical element is mounted, within- the trof&r body. In some embodiments, at least- 25% of total light output fism fee light fixture is indirectly reflected from the trof er body and at least 25% of the total light is direc emitted through the diifaser sirriaee from the linear light scarce. The troffer body may correspond to at least 95% reileerivlty. The mfrer body eau be comprised of a plastics material. The liuear lighi source is located at ap roximatel 20% of fee center of the Hght fixture i» both the k atal. and vertical directions. In addition, the linear optical element in coashination with the he t sink can act as approved electrical enclosure, ^" The light fixture ca be conHOared such that one end of the linear light source share as electrical enclosure with a power supply such that the power supply and the optical element houses ail electronics in the fixture so that the trofl r body and remaining trofter structure forms a passive reflector with no electrical requirements or enclosure.

According to some embodiments, a linear peudani light is- -described. The pe«daut*based an-angeraeut comprises a co-extmded component, the co-extruded component comprising a photdlammeseenee portion, a diifuser portion, and a top portion, wherein the portknn the difiuser portion, and the top portion .are all ieteginlly footed m the ee««xtiuded component. The ar∞ <?m«Btt further inclodes & s p ort simoture lor haagiag he -co-extraded. com onent as a pendant light fixture,

Some e hodhn&ots pertain to a linear lighting arracgerasot comprising white LEDs aad & hollow co -ex ruded eoo pooen . In this embodiment, the hollow eo-extruded eomponent comprises a diShser port n and a top portion, - he hollow eo-extraded component ma also inelode a photolmnineseence portion, although not accessary in ail cases if the white. LED already ioeludes m nnespsolant having pkHolumisescejKse materials.

Io some embodiments, the isgm d wavelength conversion component iscindes a housing portion that encompasses a wavelength com'crsion portion (havk a¾ or more phosphois) and part of fce u per body portion (formed of clear materials). The housing portion includes slots to receive the substrate and. the heat sink Both the circuit hoard and the heat sink ass- mounted within the cosnponent ^' by inserting the edges of the eirenk board rid the heat sink along and through, the slots. The heights of the slots are configured to accommodate the combined thickness of the substrate and the base of the heal sink The heat sink thoreiore extends along the entire length of the imegra&d wavelength eomponeni adjacent to. the circuit board, End caps can he placed at the ends of the integrated wavelength omponent* screws used to affix the no caps to the iroffer body, thereby also rigidly holding the integrated wavelength com onent in a designated position within the iro!!er body. The power sup ly can he attached to the exterior surface of the tref&r body in electrical communication with the circuit hoani. A power supply eseios re cart be affixed to the troffcr hody in a position thai surrounds and protects the power supply.

The iroifer body can be loosed of any suitable materials, e.g,, plastic or polycarbonate. The interior of the troffet bod is light reflective (e.g., due to a light .reflective coating or because the body is constructed of a light reflective materia!) so that, light emitted trout the integrated wavelength conversion eampouersi m m upward (ioditeet) direction will he su sequentl reflected at a downwards direction. The interior of the troffer body includes curved surfaces to reflect light m a downwards direction, with the specific configuration of the curved surfaces to promote a desired light emission pattern. The trofier body can he sized so that it fits within standardised ceiling tile configurations.

In some embodiments, the substrate comprises a strip of MCPCB (Metal Core Printed Circuit Board). The metal core base of the circuit board is ount d in thermal, nommunfcation with the heat siufe, e,g., with the aid of a thermally conducting comp un such, as for example & material eosiahhog a standard heat sialc cornponrid coatninisg beryllium oxide or alnffiims nitride. One or more solid-state light emitters (e.g., LEDs) is/are mounted on the circuit board. The LEDs can be configured as an array, e.g., in a linear array and/or oriented such that their principle emission axis is parallel with the projection axis of the lamp. The heat sink is made of a material with a high thermal conductivity (typically >1 SOWnf'K ^*1 , preferably ^OOWm^K ^"1 ) such as for example aluminum (^50Wrn 'Κ ^*1 ), an alloy of aluminum, a magnesium alloy, a metal loaded plastics material such as a polymer, tor example an epoxy.

The upper portion of the integrated wavelength conversion component is located along the top of the integrated wavelength conversion component on either side of the housing. The upper portion can be implemented as an optically transparent substrate (window) or lens through which light emitted by the wavelength conversion portion can be emitted in an upwards direction. In a troffer arrangement, this upwards emission permits emitted light to be directed at (and to widely "fill") the interior surface of the troffer body, and to then be reflected outwards in directions controlled by the configuration of the angled/curved interior of the troffer body. In some embodiment, the upper portion comprises a clear polycarbonate or plasties material.

The diffuser portion can be located along the lower portion of the integrated wavelength conversion component. The diffuser portion provides a diffuser that is integrated within the rest of the integrated wavelength conversion component. This means that the lighting arrangement does not need to include any other separate diffuser in order to diffuse the light that is emitted from the wavelength conversion portion. The diffuser portion can be configured to include light diffusive (scattering) material. Example of light diffusive materials include particles of Zinc Oxide (ZnO). titanium dioxide (TiG _? j, barium sulfate (BaS0 ₄ ), magnesium oxide (MgO), silicon dioxide (Si0 ₂ ) or aluminum oxide (A1 ₂ 0 ₃ ). The shape of the diffuser portion contributes greatly to the final emissions characteristics of die lighting arrangement, in some embodiments, die integrated wavelength conversion component includes a generally V-shaped lower profile for the diffuser portion. In an alternate embodiment, a rounded (arcuate) lower profile is provided.

The shape of the wavelength conversion portion can be configured to emit pho uminescence light with any desired emissions characteristics. In some embodiments, the wavelength conversion portion is shaped to more effectively promote the effective distribution of light by the diffuser portion. For example, the wavelength conversion portion can have a lower generally V-shape or part elliptical profile that generally and evenly directs photoluminescence light across the surface of the diffuser portion. The combination of the clear top portion and the diffuser portion permits separate control of the indirect and direct light patterns emitted by the lighting arrangement. The light emitted upwards (indirect emission) through the clear top potion permits a wide angle, upward emission designed for optimal fill from the arrangement. The light emitted downwards (direct emission) through the diffuser portion provides a forward lambertian emission by direct light from the arrangement

The wavelength conversion portion can be formed of and/or include any suitable photoluminescence material(s). In some embodiments, the photoluminescence materials comprise phosphors. However, the invention is applicable to any type of photoluminescence material, such as either phosphor materials or quantum dots.

The design of the present embodiments permits a more compact and efficient design that more efficiently isolates the electrical portions of the arrangement. Here, the electrical portions of the lamp is fully contained within the housing portion and is further electrically isolated in either end via the end caps to the power supply and the enclosure, There are no additional wiring structures or conduits required through any part of the troffer assembly. This inherent electrical isolation through a very compact space permits the embodiments of the invention to generally require only a relatively small portion of the lamp at or within the housing portion to require any special requirements for dimensions and/or materials (if necessary at all) to meet certification requirements, potentially allowing the rest of the lamp to be formed with less stringent requirements for dimensional thicknesses and/or specific materials. This can reduce the overall cost, weight, and complexity of the design or the lamp. Therefore, the isolation of the electrical components to the single compact portion through component (rather than through a troffer) allows for the troffer body to be configured with a much lighter and cheaper material composition (e.g., a plastic reflector material). This results in much lower costs, easier manufacturing, and lowered final weight for the lighting arrangement.

In some embodiments, the linear optical element combined with the heat sink acts as an approved electrical enclosure. One end of the linear solid state light source or array shares an electrical enclosure with the power supply such the power supply and linear optical element house all electronics in the fixture, allowing the reflective body and remaining troffer structure to be a passive reflector with no electrical requirements or enclosure. In some embodiments, the total weight of the plastic troffer is less than 61bs for a 2 s 2 troffer and less than 121bs for a 2 x 4 troffer of which greater tha 70% is plastic.

It is noted thai the integrated nature of the integrated wavelength conversion component also provides anerous a vantages, lategratiag the wavelength convers on eo poaeni with aa enclosure teviag other portions (such, as tae diftbser portion) that f ms a -unitary component avoids many problems associated with- hayiag them separate co poaents. With the present invention, Use integrated e-oamoasnt can be assembled wilhoai returning compdaenls for these, fractional, portions, and without epai ing separate assem ly act ons to place them into a lighting amage eni in addition, siguific&at material cost savin s can be achieved th die present invention. The overall cost of die integrated comp aeni is generally less expensive to manufacture as compared to the combined costs of haviag a separate wavelength, conversion cornponeat and a .separate di!lbser eompoaeat. la additioa, separate packaging costs woald also exist for the separate cotapoaeat Moreover, an organi atioa may incur additional administrative costs to Ideraify sad scarce fee separate com onents. By providing an integrated eompoaeat that integrates the different portioas together, many of these additional costs can be avoided,

The present inveation also provides better light emission characteristics for the lightin arrangement This is particularly advaalageous since the lighting- -arrangeajeat allows ibr both upper (indirect) aad lower (-direct) light eaassioas from the integrated component. The design .of the present embodiment Is particularly ankjne. given the ^'w fioat!ag' ^? narnre of the indirect/direct sealed optical element placed in the auerior aad/or csster of the cpnajx eat (not against a reflector wall), la addition, the troffer design caa. be s½pHfie<¼, since a separate diffaser and panel/door are ao- longer needed aad a socket is act seeded for fluorescent tabes.

According to: some e bodhneal, a troffer lighting fixture comprise siagle linear solid-state light source or array of sources oa a single linear PCS located within 20% of the. center of the fixture in both the .horizontal and vertical ejecti n-?. The linear light scarce is attached to a tabular optical element greater than w aich.es in. width that includes a drf&ser surface substantially facing in the direction of light emission. The linear light source combined with the tubular linear optical dement provides both, direct sad indirect emission of at least 25% i both the upward aad downward directions.

ia one embodiment a single walled molded treffer body is provided that corresponds to greater than 95% reflectivity that is ade of plastic or similarly footed aoB-ferroe material, la some enfoodiments, the trotfcr provides at least 25% of the total light coming from indirect reflection off of die reflective body and at least 25% of emission co ing from direct emission f om the forward, facing diffaser attached to the linear light source.

The advanced design of the n e tion therefore provides for better light uaiformit , high reliability, an improved perforjnasee, white as. the same time allowing for lower costs, less complexity, lower ei ht .n^u re aeuts, aad ^' atucfc im ro ed assembl efficiencies.

Different c mbina ions can be configured for the Poiier body d integrated wavelength conversion component An integrated wavelength conve sion component having « rounded w or 8 generally V-shaped, profile can be used in combination with a trofier body, la some embodi effis, the interior walls of the tr ffer body are curved throughout the txoffer, This means that the ends of ihe iafegr&ied wavelength conversioa component are sloped/carved to match die curved shape of the inferior wails of the trofier. This configuration is different from so approach whets the end walls of the trotter body are £φβ«<Ιίε«.Ι«Γ rather than curved, which m ans that the ends of the integrated wavelength convers on com onent in these embodiments do not need to be sloped'eerved.

In some embodiment, die Integrated wavelength conversion component is used to torn a peodeat temp. Here, the integrated wavelength conversion component is suspended torn a ceiling nsmg suspens on structures, e.g., support rods or cables attached ¾> a heat sink support structure. This application of the cranpoaeat is feasible due to the integrated nature of the component, sines no. additional com onents are seeded to provide a diffaser or .support structure for the LBDs/circuit hoard. Because a tro ler does not meed be included in this pendant lassp application, there no seed for light to be emitted from the top of the lamp. Therefore, the top or ion of the component does not need ^' to be formed of a clear material, instead, the top portion ears be formed as a refteeior portion. In t is embodiment, the reflector portion caa comprise a light reflec ive material, e.g. _s a light reflective plastics jfiaterial. Altematsvely the reflector caa comprise a metallic cors ooear or ¾. component with a .metallisation sarfaee,

In other pendant lamp embodiments Ihe (op portion caa emit light to ilinrsinafe the ceiling. The spacing of pendant lamps and/or troffers cm be selected to ensure a aaiibrm illomniation at specified heiget(s) within, die environment.

Aa a!teraa&ve emhodiateat uses white LEDs, where the photxdmninescenee material is provided in. a material that directly encapsulates the LED chip. Since the photolaminesoetsee material Is provided as part: of the structure of the LED chip on the suhstrate, t s raeaas that portion in the integrated component does not seed to include piKriolamiaes eace material. Instead, the materials used to form portion can be made of a transparent material, e.g., a clear ^• polycarbonate or oilie plasties materia! or a light dit!bsive material in yet another embodiment, photol¾mlneseence material can be included in b th art eacapsalaat- for the LEDs as well as in portion. .¾ embod ments where the mtegrated. componen has a constant cross section (profile), it can fee readily manufactured usi as ext usioa method. Some or all of the integrated eomponeat -caa be. formed using a light iirsmmisst e

materia! such as pofye^rbaaate. a ylic or & low iemp&mtw:® glass using & hot exu ision process, Alternatively same or all of th« component cm eempri.se a themrosettuig or UV curable material such as -a silicone or spoxy material sad be ormed using a coM extrusion method, A ^' benefit of extrusion is that i is relatively inexpensive method of roarmfaeture.. Different types of extrusion processes may be ased to manufacture tfee mi rat d wavelength conversion, component In some embodiments, a acaturs, extasion approach is performed to manufacture the integrated avekng h conversion compo ent

In some embodiment, a heat smfc -ean be integrall formed into the integrated wavelength conversion component. In this approach, material for the- best sink is provided to the extrusion bead by a separate extruder, and the -heat sink material is used to extrude the poriioa of the component adjacent to the mt dod location of the circuit board ^' having t¾e LEDs. Any suitable materia] .may be used as the beat sink material, so long as the material has sttlBeieni thermal cond cianee properties adequa e to handle the amounts of boat to be generated by the specific lighting appIication Configuration to which the invention is directed. For example, -thennai!y conductive plasties or polymers ha ing thermally. conductive additives may be used as ins source material .for the extruder that forms the heat sink portion of the component The ..integrally formed heat siak stay be used to avoid the need to add an external heat sink daring the -maMfacturmg process for the lamp. Alternatively, the integrally formed heat sink may be used in conjunction -with a» external bea sink.

Some embodiments pertaia to surface moa r able linear lighting .arrangements, -such as for example wraparound lamps, where the wavelength conversion and top po ions are integrally formed, hut the bottom portion comprises a -separate component These different portions may be m ufactur d using any suitable mannfacmring approach. .For -example, all of these portions can. be extruded, albeit not eo-extruded when manufactured separately, Aitemati vely, some of the portions are not extruded, bet are instead manufactured using a different maaufeeturiug approach (e.g., vacuum, molded),

Having the components separately manufactured bat capable of being assembled together into a single, lighting arrangement: provides numerous advantages. In some embodiments, this approach permits individually formed combinations of selectable properties for the top portions relative to the selectable properties of the bottom portions. For example, the integral top o i n aveleng h conversion portions may be manufac ured such that the top portion for a fet variant of She top portion component is clear white a second -mri t of the. top portion component is reffeehve. Meanwhile, the bottom ortion is a&afselutfed in a first vanaai lo mefade: diffuser materials, while a second variant does not meiude dirlirser materials. This ^' permits a first co.ffibira¾tio¾ where the top _. poriioft is clear while the bottom portion, comprises a dit&ser, a second combination where the top ^' portion, is clear while the bottom portion is without difthxer, a third combination where the top portion is ileelive while the bottom portion comprises a■diffuser, and a fonrth combination where the top portion is reflective while the bottom portion is withou a diffuses-.

Another advantage of having the component k two parts is that his enables the mounting... and electrical connection of the power su ply wifcm the lighting arrangement. This also provides a way for installation and/or maintenance personnel to- access the interior of the lighting amrogernem, while still allowing the .final arrangement to be assembled to have a closed-wall profile.

The bottom portion (e.g., diffirdve portion) and top portion (e.g., light reflective portions) can include ^■ ■features enabling them to be seeoreab!y attached to each other by, for xampl , a sna .fit, I» some em odiineats, the light -reflective portions can he asbstan iai!y rigid and the light diffusiv portion cm be cently deformable enabling insertion of the light diffusive portion, by mechanical flexing,

Soree --emb dime ts of the Invention are directed at a surface monatabte linear lamp having integrated wavelength conversion component. Another embodiment pertains to a task light haviag.-an integrated wavelength conversion c mpone

BRIEF DESCRIPTION OF THE DRA WINGS

In order that the present Invention is better understood L£l -based light emitting devices and p otolsminescence wavelength conversion components in accordance wit She inventlot) will now be described, b way of example oniy _> with reference So the accom anying drawings m which like reference nomemls are used to denote like parts, and in which:

FIG, 1 shows an example of a traditional ceii g-moxnttaMe toiler;

FIGS. 2 .~C respectively show a perspective view, an exploded perspective view and a sectional ^' end view through A~A of m improved t offer-based lighting arrangement according to some embodiments of the Invention

FIGS. 3A« respectively show a perspective exploded view and a». enlarged end view of an

LBD-based linear lamp according to an embodiment of the invention

FIO. 4A-E shows various views of a troffer body milked in the troi!er-hased. lighting axra»getae»t of FIGS, 2A- :

HO. SA-C respectively sho a ers ective view; aa end view, ¾ad so nl rged eo view of the housing portion of an integ ated wavelength, conversion coropone ;

FIO. Is a polar diagram sho iag ^' tfcie -arsgukr ©mission characteristic of he integrated w&veleagth coaveresoa campoaeot of FIGS, 5A-C i!Iostu¾ting direct and indi ect em ssion of the cosB.pct.siest;

FIG. 7A shows a perspective exploded, view of m alternative coffer- based lighting arrangement according to an embodh»est of the invention comprising a metal box enclosure; FIG, 7B sho s a perspective exploded view of a forte irofier-based lighting arr n ement according to an embodimeaPof the isvontson having a metal trofier body;

FIGS. 8A~C respectively show a perspective view* m end view, md an enlarged sod view of the housing portion of integrated wavelength conversion comjxment hi which the integrated wavelength cosversioo component has a dif&ser portion that .has a rounded profile for the lower portion;

FIGS, f A-€ respectively show a perspective view: end iew, and an enlarged end view of t¾e housing portion of an integrated wavelength, conversion componen in which the integrated wavelength conversion, component includes protroslous on the upper portion so form recesses tor »cei.ving a circtai board;

FIGS, !oA~S respectively ilksnnte a plan view, ami rspecti e end sectional vie through B~B of a troiier-feaaed lighting arrangement with m misg i&S wavelength c nve sion component having a roonded .lower profile;

FIGS, 11A«B respectively i!lostrate a plan view and perspective end sectional view through C->C of a troffer-based lightin arrangement with m integrated wavelength conversion, componerit having a generally V-shaped lower profile;

FiGS. I2A-C respectively illustrate a plan iew, a perspective end soctionai vie diKu g .0- D wad m exploded perspective view of a troffer-hased lighting arrangeroeat in which the interior walls ©f the iroiftr body are curved, throughout the trofTer body;

FIGS. Ϊ3Α-Β respectively show a perspective view and as exploded perspective view of a pendant lamp according to m embodiment of the htvestion;

FIG. 1.4 illustrates a process for eo-extradiag the integrated wsve!etsgth conversion oampo sfc.

FIGS. i5A-I> respectively illustrate .first and second perspective views, an exploded perspective view sod m eod view (without end caps) of a sorfaoe isonntab!e wraparound linear lajop according to an erobod½eot of the invention; FIGS, ί Α~ , ΠΑ-Β, I8A-B, 19A-B, 2*Λ» , and 21A~B each, ttte raie perspecti e and end views of alternate embodiments of ^' integrated wave-length con rsion eon¾x>nents for s rface monntanle: wraparound imear lamps;

FIGS. 22A-.D respectively illustrate first and second perspective views, an exploded perspective view $a& an end iew (with t ead caps) of an alternative surface mountable rapsraa linear lamp;

FIGS. 23A«B respectively illustrate ^' perspective and end iews oftfee integrated wavelength com¾rsion component of the surface mountahle wraparound lioear lamp of FIG. 22A- ; FIGS. 2 A~.i respectively illustrate first and second, perspective views, a partial exploded perspective view, fully exploded perspective view am! as md view (without said caps) o a further surface mevrj ab!e wraparonnd Haear lamp;

FIGS, 2SA-B respectively illustrate perspecti ve and sod views of the inte ated wavelength conversion com ne t of the surface inouatable wraparound linear lamp of FIG. 24A~S¾ FIGS, MA _' respectively illustrate a pe spective view, first: and second exploded perspective views and as end view of a task light according to an embodiment of the invention;

FIGS. 27A-B .respectively illustrate perspective aad en views of as integrate wavelength conversion component for tie task light of FIG,

FIGS. 2 A-I respectively illustrate fet and second perspective views, as exploded perspective vie and an end view (without end caps) of a. task.: light according to a embodiment of the invention

PIGS. 2fA~B respectively illustrate perspecti ve and end views of an integrated wavelength conversion component for the task light: of ^' FiOS 28A-D

FIGS. 3 -C respectively Illustrate a perspective view, .an exploded perspective view md an end view of a mini task light according to s me embodiments of fee invention; and

FIGS. 3 !A«B respectively illustrate perspective and cud views of an inte rate wavelength converxioa component for the mini task light of FIGS 3 A-C.

DETAILED DE CRIPTION OF THE INVENTIO

Embodiments of the present invention pertain to linear lamps that utlise solid-state light emitting devices, typically LEDs (Light Emitting Diodes) in combination with an integrated wavelength, conversion component.

FIGS. 2A-C. illustrate m improved. trofi&r-hased ligirting axr&tigercent WO according to some embodiments of the iaveation that can be mounted ih suspended ceiling as are commonly found in offices- FIOS. 2A-C respectively show a perspective ew, aa exploded perspective view- nd a sectional end view through A.-A of the troffer-based lighting armngement- 10 . FIGS. ^' 3A»S show a perspective exploded view aod m enlarged erstl view of an LED-b&sed linear lamp 9 according to an embod ment of the mveatioa. for the trofie -based lighting arrangenuitrt ΙΌ0, The lighting a msgemem 1 0 comprises a LED-haseci linear lamp 9 that resides wil a- ^' a light reflective troffer body (frame or enclosure) 204. The linear li btmg arraage eat .9 comprises a hollow integrated wavelength coaversion o p ne t 10. An elongated Snbstrate 160 (e ., circuit board) containing a linear array of LEDs 21 k iasertable within (or adjacent to) the integrated wavelength eoaversioa component 10.

The hollow Integrated wavelength conversion eo poaent 10 includes one or more photoiimuaesceaee materials (e.g., phosphor materials) which absorb a portion of the excitation light emitted by the LEDs 21 and re-emit light of a different color (wavelength). Its some emfeodhneafc?, the LED chips generate blue light and the hosphors) absorbs a percentage of the blue light and e-emits yello light or a eombiaatioa of green and red light green and yellow light, green md orange or yellow and red light The portion of the ½e light generated by the LED chips that is not absorbed by the phosphor materia! combined with ^' the light emitted by Che phosphor provides light which appears to the eye as being nearly white in color. Alternatively, she LED chips may generate ultraviolet (UV) light, in which phosphor(s) absorb the UV light to re-emit a eombiaatioa of different colors of photolttoiioeseeace light that appear white to the human eye. UV light may be useiuL for e am l , in combination: with -certain compatible phosphor materials such as blue and green light As is evident, the invention, may be practiced using any combmation of LEDs 21. that produce diSereal colors of light. For example, another embodiment: may include- an a ray of LEDs M that comprise both Woe LEDs and red LEDs.

instead of requiring a separate difihser to be individually sourced and then added to the troflef -based lighting anungemeal 100, the integrated wavelength conversion component 10 in some embodiments of the present inveahoa includes a lower dii&ser portion 22a that is integrally formed into the component 10.

The lighting arrangement 100 farther includes a power supply 200 to supply electrical power to the LE s 21 on the circuit board 160. A power supply enclosure 202 can surround all and/or part of the power supply 200.

.FIGS. 3Λ shows aa exploded view of the LED-based linear lamp 9 coniprising aa assembly of the integrated wavelength eosrversion component 10, wavelength conversion: component end caps 29, the substrate Mil and a heat sink 210, As discussed further below wftBi .regard to FIG. 3B, the Integrated wa elength conversion component 10 includes a housing portion 208 that encom asses a wavelength coa emoh portion 20 (having one or more phosphors) and pa« of &e upper body portion 22 b (formed of ..light ttan&hnssive, clear* tsa eriais). The hous ng por i n 8 includes channels (slots) 212 to receive the substrate tl sad the ^' heat sink 21:0. As shows in the magnified vie of FIG. SB. both the circuit board IS and the heat sink 210 are mounted within the coaspoaest 1 by inserting the edges .of the circuit ^' board 160 and the heat sink 210 along an through the channels 212. It is noted that he combined thickness of the substrate l®> and the base (foot portion) of the heat sink 210 is configured to fit within the height of the slots 212. The heat sink 210 extends along the entire length of the integrated wavelength component 16 adjacent to the ohcuit board 160.

The md caps 29 are placed at the open end ^' s of the integrated wavelength com n nt 10. Screws or other fixtures can be used to affix the end caps 29 to the troSer body 204, thereby also rigidly holding the integrated wavelength compoaent ί in a designated position within the troffer body 204. The power supply 200 is attached to the exterior surface of the troffer body 204 in electrical communication with the circuit hoard 100. The power supply enclosure 202 affixed to the txoffer body 204 in a position that surrounds and protects the po wer supply 2 0.

FIG. 2C is a sectional end view along A-A iHttstraitag the relative positioning of the the LED-based linear lamp 9 within the troff&r body 204. The troffe body 204 cm be looked of any statable materials., e.g, _; plastic or polycarbonate. The interior of the troffer body 204 k light reflective (s.g. _s doe to a light reflective coating or because the body 204 is eoastructed of a light reflective- material) so that light emitted from the integrated wavelength conversion component 10 In an upwards direction will he subsequentl reflected .at a downwards direction. The interior of the troffer body 204 includes curved surfaces to reflect light in a downwards direction (ie, la a direction toward tits troffer bod opening), with the specific configuratioa of the curved surfaces- to promote a desired light em s i n pattens.

The toiler body 204 can be sk-ed so that it fits within standardized coiling tile configurations. FIG. 4A-.E respectively shows a first end view, pian view, a sectional end view along A-A, an upper perspective vie-w and a lower -perspective view of the troffe body 204.

In some eaiboduaeats, the substrate 1M comprises a strip of MCPCB (Metal Core Printed Circuit Board), As is known a MCPCB comprises a layered structure -composed, of a. metal cote base, typically aluminum, a thermally conduc ag/electriea ^' Uy insulating -dielectric layer and a copper circuit layer for electrically connecting electrical components in a desired circuit configuration. The metal core base of the: circuit board 161 is mounted, la thermal eonanimieation with the heat sink 210, e.g., with the aid of a. theimliy conducting compoaad. mch as for example a material er t&ining a staadanj heat sink, compound eeniai&iag beiyl!i ra oxide or akiminara nitride.

Gas or more soiM-state light emitters (e.g _f , LEOs 21) arc mounted on the. circuit board . Each solid-stats lig t coMfter 21 can comprise a gallinm .nitride-based bine light entitling LED operable to generate blue light with a domi ant wavele gth of 4S5aa>-465ara, he USDs 21 cm be configured as an array, e.g,, I a linear srray and/or oriented such that their principle emission axis is orthogonal to the loagiiudios! axis of the circuit hoard.160.

The heat sink 210 is made of a material with a high thermal conductivity (typically .l SOW f preferably >2mW ^x K ^' ) smb. as for example ahatlaum («250Wm ^"{ : ^"3 ) ₅ an alloy of al minnm, a magaesi«m alloy, a metal loaded plasties .material such as a polymer, for example an epoxy. The heat s 210 can be manufactured using any suitable omoofeciuriag process, e,g., extruded, die east (e.g., whea it comprises a .metal alloy), extruded, and/or molded, by t r example injection molding (e.g., when it comprises a metal loaded polymer). FK3. 5A pfpvides- a more d tailed perspective view of the integ ate avelengt conversion component 10. FIG. SB shows aa end view of the integrated wavelength conversion componen 10. FIG. SC shows an enlarged end view of the housing portion. 3 8 ^' of the integrated wavelength conversion, component 10. in a typical application the integrated wavelength conversion component 10 has a width (i.e. a dimension in a direction orthogonal the direction pf elongation of the component) of sboui five inches (5'*}.·

The integrated wavelength conversion component JO is formed as aa. iategrated structure that hiehides different portions having different physical and/or optical properri.es, Jn the emb diment of FIGS. 5A-C _} the hollow integrated wavelength component 10 includes a wavelength co-aversion portion 20, a lower diffaser portion 22a, and a& upper portion 22h. la the tilustm ed embodiment, the wavelength conversion, component 16 comprises a profile .formed as a continuous- wall where certain porticos along the lengths of the wall correspond to the wavelength conversion portion 20, diffuses- portion 22a, and upper portion 22b. The continuous wail defines a hollow component having an Internal volume 11.

As diseased ia more detail, below, the wavelength conversion portion 20 comprises one or mors photohmanescenee materials that produce pi.Kaolumineseen.ee light ki response to excitation, (mm LEO light The wavelength conversion portion 20 is formed as a portion of the wall length of the. integrated wavelength, conversion component 10 that projects into the hollow interior volome 11 of the integrated wavelengt conversion component ^' 10. The wavelength conversion ortion 20 therefore forms a pr setion i& a projection direction 13 The shape of the wavelength conversion portion 20 is configured to define so open votome 1.5, sntlkkotjy large enough to allow ksSeriios of an army of LEDs 21 into that open, (hollow) volume !S, The channels 312 for holding the edges of a substrate i i h g the LEDs 2Ϊ and/or heat sink 210 are also integrally farmed in the inte rated wavelengt conversion component 10. FIG. SC shows, enlarged view of tie housing p r n ^' 208 of the Integrated wavelen th conversion comp ses?: 10. The channels 212 are configured with the appropriate height and width to t«eeive me circuit hoard 16 having the LEDs 21 and/or ^' hear sink 210, suck that the LEDs 21 are oated within the v lume 15 nd face downwards towards the wavelength conversion portion 20 (e.g., as Indicated hi FIG. 3B),

The upper portion 22h is located along the top of the inte rated wavelength eon ersi n component 10, arid comprises the wall lengths of the component 16 on either side of the housing 208, The upper portion 2 h can be implemented as an optically transparent sabstrate or leas through which light emitted by the wavelength conversion portion .20 ears be emitted is an upwards direction In the iroffer-bassd lighting amsgement 109, this upwards emission permits emitted light to be directed at. (and to widely "filP) the interior face of the, tro!Fer body 204, and to then, he reflected outwards in directions controlle by the configuration »f the &ogled/corved interior of the irotrer body 204. This serves to maximise the light coverage by the lighting arrangement 100. Another advantage provided by havin the upper ^' portion 22b is that tins provides a sealed top 10 the lamp, which avoids a "bug trap ^* or "debris imp ^** problem of having, unsightly contaminants ntr de within the interior volume Π of the lamp. In some embodiments, the entire surface of the integrated wavelength conversion component 10 (except for the ends) is formed as a closed surface. Alternatively;, -a substantial portion of the surface is closed (mther than the entirety of the surface) where openings ma be formed in the sur&ee of the. integrated avelength conversion component 10. e.g., where small openings are provided to allow heat exchange from the interior of the component 10, Any suitable material can be used to Implement the clear portion 22b. In some embodiment, the upper portion 2b comprises a clear polycarbonate or plastics material

The diffhser portion 22a is located along the lower portion of the wail lengths of the integrated -wavelengt conversion component 10. The diSnser portion 22a provides a diffbser that is integrated within the rest of the integrated wavelength conversio component 10, This .means that the lighting arrangement i does not need to Include any other separate d|i¾user in order to diffuse the light that is emitted from the wavelength conversion portion m.

The diffuser portion 22a cm be configured to include light ^' diffusive (scattering) material Example of light difmsive materials include particles of Zinc Oxide (ZsO), tiias ium dioxide (ΤΙΟ¾), barium snl&te (BaSO*), magnesium oxide (MgO¾ silicon dioxide (Si<¾) or alumkom oxide (A½<¾ . A description of scaiteriag particles that can be used, in corgunetion with ^' he present ioveathm Is pjwided in U.S. A lication Serial No, 14/233*036, filed ou. March 2014, entitled "PIFFU ER COMPONENT HAVING SCATTERING FAR1ICLES" _; which is hareby inootporated by reference m its entirety.

The shape of the .diffuse portion 12& contributes greatly to the Sml emissi ns charact ristic of the lighting arrangement JO0. m the embodhmeat illustrated in FIGS. 5A ^» €, the mtegmted wavelength conversion compo&eat includes a generally V-shaped lower profile for the diifoser portion 22a. The apex of the V-shape can bo relatively muit ed (as shown in FIG. SB) or relatively more angular (as shows in FIG. 12 }< This ^' V-shaped p ofile .facilitates light emissions that directs greater amounts of light perpeodiculariy outwards from the straight linear edge of the V-sbape of the diffuser portion 22a. This permits emissions of light from l ght ng arrangement 10(1 that are both uniform while also providing a greater amount of coverage area. This allows one to maintain good .light coverage with the lighting arrangement even with relatively less lights that need, to be installed (since there relatively greater amounts of light emissions coverage provided by each light and hence greater amounts of spacing can fee permitted between the installed lights wnhoat loss o lighting performance). The difmser portion 22a therefore facilitates high efficiency .operation of the lump while avoiding bright centers or spots along the length of the lamp (as would otherwise he th ease of the LEDs 21 along the ea«uit hoard 161 are made directly visible).

The shape of the wavelength conversion portion 20 can be configured to emit phoioiuminesoeuee light with any desired ¹ emissions characteristics, la some embodiments, the wavelength conversion portion. 0 is shaped to .more e!&etively promote the effective distribution of light by the diffuser portion 22a. For example, ia the embodiment of FIG. SA-C, the wavelength conversion portion 2# has a lower generally semi-circular profile thixt generally and evenly directs phomhmimescenee light across the soriaee of the diffuser portion 22a. A lower V-sa&pe profile can also be used for the wavelength conversion portion 211 according to alternate embodiments. It is noted that the wavelength conversion portion 20 is spaced apart f om the dif&ser portion 22a by the hollow interio volume U. ft will be appreciated that the wavelength conversion portion 28 also substantially neduces. bright eeniers or hot spots along "the length of the lamp 9 due to the presence of the botolamraeseeace material (typically one or more phos hors).

The combination of the clear upper portion 22b aad the lower diffuser ortion :22a therefore permits separate c afcol of the iadireei a&d. direct light patterns .emitted by; the Mg&img aixasgeaieBi 100. l¾e k emitted ap &rds (indirect eaton) through She clear upper portion 22b perants a wide angle, _, op ard eraissioa desi ned for optimal fill m the asrasgemest 100. The light smiths! dow wards (direct emiss on) through the diShser portion 22a provides a orward kmherti i enrissi a by direct light .from the arraagsmsat 100.· FIG, (s is a polar diagram sle in the aaguiar emission characteristic of the light ag arraagemeai 9 ifhiSiratiag direct aad iatiireet emission cosmponeats.

The wavelength conversion portioa 20 can be formed of aador ita lude any suitable plxuahuniaesoenee maierial(s). in some embodiments, the photohaa escenee materials comprise phosp o s. For the purposes of iifestmrioa only, the folio whig dessriptioa is made with reference to pltotokmimeseerice materials embodied specifically as phosphor i Stelais: However, the inversion s applicable to any type of plwtohaaiueseeace material, such, as eithe phosphor materials or quantum dots. A quaatem dot is a portion of matter (e.g. seaiieonduetor) whose excitons are coafked so all three spatial mensions that may be e cited by radiatiOB energy to emit light of a particular wavelength or range of wavelengths. The oae or moxe phosphor materials can include a¾ iuorgauio or organic phosphor such as for example sdicale-feased phosphor of a general composition A _;5 Si(0,D) ₅ or A}$i(Q )* which Si is silicon, D is oxygea, A includes stroatiani (Sr , ¾ari«m. (Ba) magoeslam ( g) or cakimri (Ca) sad D iaclades ^■ chlorate (CI), ftaorine {P) _> it gen (N) or sidfer (S). Examples of sihcate-based phosphors arc disclosed is United States patents US 7 J 75,697 B.2 h ed g eti hospho s^ US 7,601.276 B2 7w pk * siiicae-h ed ellow phosphors US 7,655,156 B2 "Si!icafe-b wd rmge phosphors " and US 7,31 1,858 B2 ^€f Sitieate^a d yellow-green phosphor ^' \ The phosphor eaa also ioetode a« ainaxfcaue-based material such as is taught ia United States patents OS 7,541,728 B2 "Novel ahonmaie-based green phosphors " and US 7,390,437 82 "Afammctte-based M e phosphors ' a;a alominum-sihcate phosphor as taught ia United States Patent US 7,648,650 B2 "Aimtimm-sili ete orange-red phdsphor" or a .nitride-based red phosphor material sae as is taught in co-peadiag United States patent application US2O0 /0283?2i Ai ''Nitride-based red phosphors" and eiaatioaal patent appjicatioa W02010/074963 Al "Nitride-hosed red-emitting in RGB (red-gree -bitte) lighting systems it will be appreciated that the phosphor material is not limited to the -examples described and cart include any phosphor material tnel diag aiiride and/or sulf e: phosphor materials, oxy««iaides and oxy-s lfate phosphors or garnet materials (YAG).

Quantum dots can mp c &rani materials, for ¾xaa¾>te cadmium selenide (CdSe). The color of .light generated by a quantum dot is enabled by fee quantum ^&aS m t effec associated with fee nane-crystal stracfare of the q satm dots. The energy level of each quantum dot relates d ciiy to fee siza of the quantum dot. For exam le, fee larger quantum dots, soeh as red quantum, dots, cm a sor and emit p otons- hsvfeg a relatively ^' lower ene y ( e s relatively longer wavelength). On fee other band, oraage quantum dots, which are Smaller in si¾e can absorb and emit photons of a relatively higher energy (shorter wavelength). Additioaally _s daylight panels are mvisioned that use cadmium free quantum dots and rare earth (RB) doped oxide colloidal phosphor uano-partieles,. in order to avoid the toxicity of the eadmium m fee quantum dots;.

Examples of suitable quantum dots iadude: Cd aSeS (cadmiam » seleaiua) sulfide), Cdx iii,, Se (cadail¾m a ac selenide), Cd¾S _s . _x (cadmim selenium sulfide) _* CdTe (cadmium ellorideX CdTe _A S (ca mium tellarium sulfide), I»P (iadiu phosphide} _* F (imliiun gallium phosphide), inks (fedhau arsenide), Cu&iSj. (copper itxdmm sulfide), CttI»S¾ (copper mdima. selemde), CnlnSVSej.. _* (copper iadium sulfur sekttide), Ca ϊ¾·08^ ¾ (copper mdiunr gallium sulfide).€¾Ιπ .8θ ₂ (c pper indium gallium se!eaido),€«¾Αΐί·.χ S -2 (copper indium alumkum. sdeaide), C«GaS ₂ "(copper gallium sulfide) and CulnS ₂ *ZuSj. _s (copper radium, selenium sase setaide)..

The qyaatatn dots material can comprise core/shell naio-crystds containing different materials is an orr n-liks structure. For exam le, the above described xempla materials can be .used as fee core materials for fee core/shell nano-crys ak. The optical properties of die core naao-erysads in one material ears be altered by gro feg an eps asia!-t pe shell of another material. Depending on the re i ements, fee core/shell mac-cr stals cars have a single shell or multiple shells. Tbe shell .materials can be chosen based on fee baud gap engineering. For example, fee shell materials c&a have a band gap larger (haa the core materials so fest fee shelf of fee aafto-crystals can separate fee sar&ce of fee optically active core from its sunxrasiding medium.. la fee ease of fee cadmiun-based cpmntuni dots, e.g. CdSe quantum dots, fee core shell quantum dots cau be synthesized using fee formula of CdSe/ZnS _? CdSe/CdS, CdSe/ZnSe, CdSe/CdS/ZaS, or CdSe/ZnSe ZnS, .Similarly, for GufeS ₂ quantum dots, the core shell nauocrystais caa be synthesized using the iormute of CuM / aS, ( ¾/CdS, CtinSj/OuGaJ . CufeSi CuGa¾ nS and so on.

in many electrical devices, the portion of the device that ^' .houses the power electronics must be configured to provide fee proper amount safety-related protection to consumers from m ^' y accidental failures of the electronic components. This type of safety-related configuration is often required for. the roduc design in order to obtain certification from various eeruifcation bodies.. In conventional lighting devices, the design of the housing typically forces a substantial amount of excess tmt£ri&¾ _$ comp e ity, and additional c mp sers to be added to the overall design of the. product.

to contrast., the design of fee p sent e.ofeodunents permits a more contp&ct and efficient design that more efficiently isolates the electrical portions of the arraugerneni He ;, the. electrical portions of the lamp (the circuit hoard 16 having the !BDs 21 is felly containe mifom the houskg portion ) and is further electrically isolated in either end vi -the end caps 29 o the power supply 200 and the enclosure 202. There are no additional wiring structures or conduits required through my past of the troffer body 2M, This inherent electrical isolation through a very compact space permits the embodiments of the invention to generally require only a relatively small portion of fee lamp at or within fee homing portion 288 to require any spec l emisreme ts for dimensions and/or materials (if necessary at all) to meet certification requirements, potentially allowing the rest of he lamp to be formed with less -stringent requirements for dimensions] thicknesses and/or specific materials, This ca reduce the overall cost weight, and complexit -of the design, or the lamp.

Therefore., the Isolation of the dec rie&i compone ts to fee single compact _, portion, through th -.integrated wav length conversion c m ne t 10 (rather than, through a troife body) allows for fee tmfter body 20 to he configured with muc lighter and cheaper material composition (e;g„ a plastic reflector material). This results in much lower costs, easier ma:r meCuring _s and lowered fed weight for fee lighting arrangement,

in some embodiments, the linea integrated wavelength conversion Com onent I ^' d combined with the bear sink 210 a d-'or circuit board lb¾ can constitute an approved electrical enclosure of the troffer-based .lighting anangetaent One end of fee UBD-hased linear lamp shares an electrical enclosure with the power supply such fee power supply and integrated wavelength conversion eomponeat house all electronics in fee -lighting arrangement, allowing the troffer body 204 to he a passive reflector with no electrics! teqtdreruents- or enclosure. In some embodiments, the total weight of the plastic trofier-based lighting arrangement is less than dibs for a 2" x 2' (wo feet by two feel) trofter and less t ai 121bs for a 2 ^! x 4 ¹ (two feet by four feet) troffer of which greater than 70% is plastic.

The LED -based linear lamp 9 of: the present invention also provides numerous advantages over conventional fluorescent linear lamps. Unlike fluorescent teams;, LED-based linear lamps do not require any mercury, in addition _* LED-bssed lamps are able to generate -higher Isms per wat age as compared to fluoresces* lamps, vMte having lower defects .rates and higher operating life expectaneies.

It is aoted that, the integrated nature of the integrated w&veleagfh con vtaion component 10 also provides .aumeroiis advantages. Integrating the wavelength conversioa portion. 28 with m enclosure timing other portions, {mck as the diff ser portion 22a thai forms a unitary component avoids many problems associated with having them as separate ¾>mpoaents. With the rese t invention, the integrated component cm be assembled without - requiring components for these functional portions, a»d without requiring separate assembly actions to place them into a lighting arrangement, in addition, significant material cost savings cm be achieved with the present laventien. The overall cost of the integrated wavelength, conversion component 18 is generally less ex ensive to manufacture as compared to the combined costs of having a separate wavelength conversion component and a separate diffuser component. la addition, separate packaging costs would also exist for the separate component Moreover, an organisation may incur additional administrative costs to identify and source the se arate components. By providing an integrated com on nt that integrates the different portions together, many of these additional costs can he avoided. However, in some alternate embodiments, the wavelength conversion component 10 does not need, to bo manufactured as an integrated com onent For example, the wavelength conversion portion 20 may he separately m nufactured, and then affixed to .a hollow component having only lowe and upper portions 22a an 22b, In this ap oach _: , die hollow component may provide an opesiog a the center top surface or i may alternatively have a closed surface at the top. The present invention also provides better light emission characteristics for the troSer-based lighting atmn emeat M8. This Is particularly advantageous since the lighting arrangement 106 allows for both upper (indirect} and lower (direct) light emissions Irom the integrated coxupoaest HI. The design of the present embodiment is particularly unique, given the "floating n tu e of the indirect/direct sealed optical element placed in the interior and/or center of the component (not against a reflector wail), in addition, the holier design can be simplified, since a separate dd user and pane!/door are no longer needed and a socket is not needed for fluorescent tebes.

According to some embodiments, a tror er-based lighting arran em nt comprises a single linear solid-state light source or array of sources on a single linear PCB located within .20% of the center of the future (troffer body) in. both the horizontal aad vertical directions. Use !mear light source is attached to a tabular optical element greater than two inches (2") in width that includes a diiTuser sor&ce substant all facing iis the direction of light emission. The linear- light source combined with the tabular Hsear optical element provides both direct and indirect emission of. at least 25% in both the- Upwar and downward du- eftem

ia one embodiment, _., a single walled moiled toiler body is provided that corresponds to greater than 95% reflectivity ^' thai is made of plastic or similarly formed non-ferrous material to. some embodiments, the toiler provides ai least 25% of the total light coining -from mdirect reflection off of the reflective body and at least 25% of emission. «>ming from, direct emission from the fbr ard feeing diffuses- attached to the linear light, source.

The advanced design o the invention therefore provides for better light unithre uy, high reliability, and improved performance, while at the same time allowing for lower costs, less complexity _* lower weight requirements, and Batch app oved assembly effiderieies, fij certain circumstaaees, there ma be limitations imposed upon the ability to use a toiler body that Is formed of plastic. For example, regional fire codes may require the se of metal for certain fire-rated, commercial installation.

F 10. ?A usfcrate a first example approach to address the situation where metal is required for a- lighting mstaJ oa. ^' In this approach, the lighting arrangement uses a irof fer body 2M formed of plastic as described above. H weve , a metal enclosure 205 ^' {e,g,, a steel enclosure) is provided to be used in conjunction, with the plastic trof&r body 204. The plastic toiler body 284 is enveloped by the metal nclosu e 205 to at least the extent snlSeient to satisfy any required regional building codes.

WIG. 78 illustrates another approach, that can he takers to addms this issue, in this approach, the troifer body 20 is now formed of a metal materia! {instead of piastk to satisfy any .required building, codes. As shown in. FIG. the troffer body may be manufactured from multiple sheet metal oomponeuts 2M& and 2IWb, inolndisg a center sheet metal .feme 214s, a left sheet metal end 204 s, aod a. right sheet .metal end 2Mb. these sheet metal frames are assembled together to form the trofier body.

The integrated, wavelength conversion, component 10 can be shaped Into my configuration as needed to Mfr!l an intended application of the mveoiioo, FIGS. 8A~€ illustrate an alternative embodiment of the invention where the integrated wavelength, conversion component 10 has a diffuser portion 22a that has a more rounded profil for the lower portion. The rounded profile of the current embodiment promotes greater amount of the emitted light to be directed directly rnulorneath the lighting apparatus, at least as compared to the less-ronnded shape of the earlier e bodiraeoi of FIGS, 5.4-C.

FIGS. ~C illustrate another ^* embodmtea of the integrated wavelength conversion component Ml Here, the housing portion 268 differs from the earlier embodiments in thai it includes protrusions 220 to define the recesses 212. This differs from the earlier embodiments in several distinct ways. First, the protrusions 220 in FIGS, 9C protrude front the exterior of the integrated wavelength conversion component 10, rather than being integrated into the flow of the wall length of the component 1.0 like the embodiments shown in FIGS. 5A-C and 8A-C. This is significant since these protrusions can make it more difficult to manufacture the component .1.0 using certain manufacturing techniques, such as vacuum-based extrusions processes. In addition, the positioning of the protrusions 22© causes the recesses 212 to be exterior to the enclosure of the integrated wavelength conversion component 10. This means that the circuit hoard 160 that slides into the recesses 212 will be outside of the enclosure profile formed by the shape of the integrated wavelength conversion component 10, which differs from the embodiments shown in FIGS. 5A-C and 8A-C where the circuit board 160 once inserted is inside the enclosure profile of the component 10. In addition, the LEDs 21 that are inserted into space 15 formed by the wavelength conversion portion 20 will be located closer to the exterior of the component 10, differing from the approaches shown in FIGS, 5A-C and 8A-C where the LEDs 21 are positioned further into the interior of the component 10.

As is clear, the integrated wavelength conversion component 10 can be formed into any suitable shape. The above-described, embodiments each pertain wavelength conversion components 10 having a non-cylindrical shape (i.e. non-circular profile). It is noted, however, that alternate embodiments may include lamps where the integrated wavelength conversion component 10 forms a substantially cylindrical shape, e.g.. for embodiments of the invention to be placed into existing lighting troffers/fixtures designed for of traditional fluorescent tube shapes.

FIGS. 10A-B, I1A-B, and 12A-C illustrate examples of different combinations that can be configured for the troffer body 204 and integrated wavelength conversion component 10. FIG. 10A-.B illustrate an integrated wavelength conversion component 10 having a rounded lower profile that is inserted into a troffer body 204. FIGS. 11A-B illustrate an integrated wavelength conversion component 10 having a generally V-shaped lower profile that is inserted into a troffer body 204.

The approach of FIGS. 12A-C also includes an integrated wavelength conversion component 10 having a generally V-shaped lower profile. However, the difference between this embodiment and the earlier embodiments is that the interior walls of the troffer body 204 are curved throughout the troffer body. This means that the ends of the integrated wavelength conversion component 10 are sloped/curved to match the curved shape of the interior walls of she trailer body 204. This canSganekm is different from the approach of FIGS. S .~B and 11A»B _S where the end walls of fe txefier body 204 are petpendlonkr rather than curved, which means that the «¾ds of the . integrated wavelength eouv rsioa compoaeat 10 in these embodiments, do ^' not need to be sloped/curved.

It s noted that the- kveaSipa- is no limited to the exemplar embodhneats described a&d that numerous other variat on can be made w¾hi» the scope of -fee invention. For example,, the it egrated wavelength co.nvemo.ft eomppuein ^' 10 of the presest invention can be ased ^" i nnmerosK other lighting contexts, and k not to be limited m its usefulness oaiy to toffer- based fighiiag arrangements,

FIGS. 13A-B ilhssiras.es art embodiment of ths invention ia which the integrated waveleagfc conversion component 10 k nsed to form a pendent lighting arrangement Chnnp) 230. Here, the integrated wavelength conversion component 1:0 is sus ended frcsss a ceiling issiag suspension structures tf e.g.,. support rods or cables attached so a heal sink support stxaefnre 230. This application of the component 10 is feasible due to the Integrated m of he component l.S, since no additional components are needed to provide a difroser or support sfc-uetare for the LBD&¾itcoit board. It is envisioned that in a typical application ^' the integrated aveleagth eoavemon component 1β .has a width (i.e. a dimesision ia a. direction orthogonal the direction of efoaga oa of the component FIG. 13B) of aboot five inches (S

Since a hvffer body does sot need be ia&Htded in. ibis pendant lamp application, there is no need- for iighi to be emitted from the top portion of the pendant %rn 230. in sneh esttbodunems i te itbre, the top portion 22b of the coiappaeat does not need to be forme of a clear mateiial Instead, the top portion 22b can be formed as a reflector portion, in this embodiment, the re-Sector portion eaa ee-mpme a light reflective material, e.g., & light reflective plasties material Alternatively the reflector can. co is a metallic component or a co poaeat with a metallization surface. In other embodiments the top portion ,22h can be formed of a ligh transmissive material (e.g.. optically clear or light difmsive) where if is desired to provide a degree of illumination of a ceiling.

In other pendant lighting arrangements th top portion 22b can emit light to dlominate the ceiling. As is kn wn the spacing of pendant lamps and/or tro!lers are selected to ens e a isniforrn illumination at for example a work, station .height within the eav¼>ame».t Typically, pendant lamps and trailers are located on a Iked grid partem, for example spaced eigh feet apart to ensure mch a um orm illumination at the work station height Where it m required to prov de si least a degree of cei sg iihmhnatiom it is desirable that such iiiunhnaiioo is also tmifbrm over the ceiling. Since the distance iroro the pead&nt top t the ceiling is t pically shorter than the distance fm . the peadao! top to the workin height, this resto es the top por i n 22b to ^' have a wider emission ebasncterishe than that of the lower d ffer portion 22» to ensure a unifomt ilhtntination of both- ceiling sod wori ares. Such difiking emission charaetcfigiics can be achieved by selecti n of t e shape and/or degree of difhisivity of the opper portion 22b and diffuser portions 22s.

Ahesttafive embodiments may employ white LEDs, where the photolumineseesee material is r vided m a material that directly eucapsuMes the LED chip, Since die photohinnneseenee material is provided as pan of the structure of the LED chip 21 on the substrate MO, ibis meaas that portion in the integrated compoaeut 10 does aot seed to htclotle photo ^' lu inescence material instead, the materials used to form portion 20 can fee made- of a transparent material, e.g.. a clear po!ycarbo!iate or other plastics material or a lig t diffusive .material, this approach differs from to ^' the previously-described embodiments where the LED chip 21 does not itself melnde photohaairsesceaee material, bat instead axe coafi red as r mote phosphor applications where the photo!oBHoeseenee materials is portion 20 are spaced apart from the LEDs 21.

In yet soother embodiment phoiolommescence ma eria! cats be meloded in. botfe .aft encapsuto ibr the i-LDs 2-1 as well as in portion 0, This embo iment is x M, for example, to provide moix¾ expensive ^' phosphor -materials (such as red phosphors) in the ene psnlant for the LEDs while ineiadiflg less expensive phosphor materials (sash as green or yellow phosphors) i» the portion 2th The advantage of this eoafigumtion is that much less hosphor .material needs to be placed k the relatively smaller volume of the encapsolant that sttrrowijds the LEDs 21, at least as compared to the amo«»t of phosphor materials that wotdd otherwise need to he placed into the much greater volume of the portion 20 of the component It).

This approach can also be taken if mete is a. need to use certain phosphor materials that may ^¬ be excessively vulnerable to possible damage from the extrasion/mo mg process used to form the hitegrated component 10. if -such phosphor materials aee to be osed, tfaea they can e placed to the eneapsnlant for the LED chips 21 rather than placed within the integrated component lih

in emhodhneois where -the integrated component .has constant cross section, it cars be readily aratfectored using an extrusion method. Some or all of the integrated component can be formed using a light transmissive thermoplastics (thermosoftening) material such as polycarbonate, acrylic or a low temperature glass using a hoi extrusion process. Alternatively some or all of the component can comprise a thermosetting or UV curable material such as a silicone or epoxy material and be formed using a cold extrusion method. A benefit of extrusion is that it is relatively inexpensive method of manufacture.

A co-extrusion approach can be employed to manufacture the i tegrated component. Each of the top portion 22b, wavelength conversion component 20, and diffuser portion 22a are co- extruded using respective materials appropriate for that portion of the integrated component. For example, the wavelength conversion portion 20 is extruded using a base material having photoluminescence materials embedded therein. The diffuser portion 22a can be co-extruded to include diffusion particles. The top portion 22b can be co-extruded using any suitable materia], e.g., a light transmissive thermoplastics by itself or thermoplastics that includes light diffusive or light reflective materials embedded therein,

A triple-extrusion process can he utilized to manufacture the integrated component 18. where three extruders are used to feed into a single tool to create the layer of phosphor portion, the materials of the top portion, and the material of the diffuser portion. The three layers are simultaneously created and manufactured together in this approach.

FIG, 14 illustrates Shis process for co-extruding the integrated wavelength conversion component 10. in this approach, multiple extruders 252a-e feed into a single extrusion head 254 to create the integrated wavelength conversion component 10. This approach can be used with a wide variety of source materials, e.g. PC-Polycarbonate, PMMA-Poly(methyl methacrylate), and PET-Polyetiryiene Terephthalate, including most or all thermoform plastics. This co-extrusion process can generally use pellets identical or similar to pellets used for injection molding materials.

A. first extruder 252a processes a first material 253a for the diffuser portion 22a of the integrated wavelength conversion component 10. As previously noted, a light diffusing/scattering material can be incorporated into the material to form the diffuser portion. Therefore, the first extruder 252a can be used to process a polymer material 253s that includes the light diffusing/scattering material. In some embodiments, the light reflective material comprises titanium dioxide (Ti(½) though it can comprise other materials such as barium sulfate (BaSQ , magnesium oxide (MgO), silicon dioxide (Si(¾) or aluminum oxide (AljOj).

A second extrader 252b processes a second material 253b for the phosphor portion 2Θ of the integrated wavelength conversion component 10. Therefore, the second extruder 252b can be issed to -oeess a polymer o orial t at also iwiude th ph sphor material A iMrd iix asder SS2c pi-ocess s a t ^' hird material 253e for the top portion ^' 22b of *h« iots W wavelength con ers on -com nent 1 , The third extruder 252* is ase-d to ^' process a clear solid material (e.g., clear polymer),

The extruders 252a«e ate used to feed the r respective materials 253&»e mio a sing le Extruder bead 254 to create the Bmkip!e rtions of materials in the integrated wavelength conversion, com n nt Hi The final product is the Jntegrated wavelength conversion component ΙΘ, where the various phosphor portion 20, difcser orti n 22a, and clea portion 22a are shaped as i Itorafed in WIG. SB.

In som emb diments, a heat sink can be integrally formed into the iategra ed wavelength conversion com onent 1.0. In. this a oac , material for the heat sink is provided to fee extrusion head by a separate extruder, and the heat smk material is used to extrude the portion of the com osers! 10 adjacent to the intended location of the circuit board having the LBDs. Assy suitable material may be used as fee heat sink material, so io.ag as the material has SBfSeieni thermal eosductame properties adequate to handle the amounts of heat to be generated by the specific lighting a plieaiionyeoitSgoratior5 to which the mventiati is directed. For example, thermally conductive plastics or polymers having fceimal!y coadtJCtive additi ves may be used, s the source material ibt the extruder that forms fee heat sink portion of fee com onen 10, The Integrally formed- ^' heat sink may ^' be used to avoid the need to add an external heat sink daring the raanufactttriftg process for the lamp. Alternatively, tbe integrall formed heat -s nk .may be used in conjunction with an external heat sink,

'Different types of extrusion processes may be isssd to mamdkotare the imegrated wavelength conversion co petent 10. 1» some embodiments, a vacuum extrusion approach Is performed to maauftetare the mtegr&ted avefcngifc coo version component 19. The- vacuum exnusiou approach is preferable when manufacturing fee embodiments of FIGS. SA-C and 8A-€, since these embodiments do not include any protrusions feat extend from fee surface of the integrated wavelength conversion component 10.

The savenuVe concepts disclosed herein, are not limited in their application only to lighting arrangements involving pendeat-based. lamps or irofifer-based lamps m unted in a suspended ceiling, la feci, the invention, can be applied to a broad range of applications beyond just pendent-based and u rffe-b sed lighting aos&get&ettte. For example, consider the typical garage, workshop, or other space that needs lighting but where the space does act .have a suspended ceiling to fit a tmrter-hased an ngemeni and/or it Is ½pracfkal to use a pendent- based lighting arrangeraeat, is this situation, it Is ofte desirable to use a surface mounted atTa gemeut to provide lighting, ibr the space.

FIGS. WA~® idastrate a surface a ormt&bie w around linear l gh ing anaagenieat 260 aee rdiag to embedmen s of the iayeaiios. The stnfae-e mouatab!e lighting amaigemeot 260 includes 8 integrated wavelength conversion c m onent id, which Is similar to the revious embodiments ia that it. ncludes a waveleagth couversiott ponies 20 haviag one or mo e pholokm> Besscenee .materials which absorb a potties of the exedabou light emitted, by the LEDs 21 and se-emft light of a different color. T¾e Integr ted wavelength conversion. com o en 10 iachides a diffeser portion 22a thai is integrally formed iat the component 10 (FIG. 15»).

The lighting a raagernml 2<S8 farther includes w&vele gth conversion, component end caps 2 & sabsbate 160, a heat &mk 210, and a mo sithi plate 270. The substrate !$ contains an array of LEDs 21 and is affixed to the ^' heat sink 210. The coaipoaeat 10 i cludes slots 212 to receive the substrate 60 and/or 'th heat sink 210. I some ^■ mbo iments, both the circuit board M$ and the heat sink 210 a e n ouated within the component 10, by insetting the edges of the circuit hoard M§ and the heat sink 210 alon md through die slots 212. in this embod eat, the combiaed thickness of the. substrate 1 1 md the base of the heat sink 210 is configured to fit within, the heigh of the slots 212, The heat sink 210 therefore extends dmg the entire length of the integrated wavelength eoaipoaent 10 adjacent o the circuit hoard 0. hi an alternate embodiment, only the heat sink is mounted within, the component W through the slots 212, la this ltern te efiibod tnest, the substrate iM is separately movable to he heat sink 2 8, e.g., rising as adhesi e or adhesive tape.

A mounting plats 270 is ased to .moun the hghtiag apraagement 26® to a ceiling, e.g., using fixing screws 280, The mounting plate can be formed of any suitable material such as an extruded aluminum section, or an eximded.iherraoplastics material. Channels ate ibnaed along the opposing lateral edges of the am nting plate 270. The heat sink 21 ⁽ can he attached to the mounting piate 278 by sliding ie edge portion of the heat sink 210 irste die efaai&e!s oft the mounting plate 270. tf the heat sink is formed from a rigidly de&rarshle material, then ihe edges of the heat sink 10 can. also he snapped into the channels of the mounting plate 270.

As ^' before, the uuepakd wavelength conversion component 10 is formed as an integrated structure that roctudes diSeteai portions havi g di e nt physical astd/otr optical properties. The integrated wavelength component 10 includes a wavelength conversion portion 211, a diriuser por i n 22a, sad .an. apper portion 22 b, where the wavelength conversion component 1.0 comprises a profile formed as -a eotmauo wall, and ceriak tions al ng he lengsts of the wall correspond to e avelen t conversion tion 20, dif&ser portion 22a, asd upper poitloa 22»,

Similar ^' to the r viousl described embodiments, the Integrated wavelength c-oaveasion component 18 includes a top orti n 22b, However, since the lightin arrangement 260 is imesded for a sur&ee mo ated application, there is little or BO need for li ht to be emitted fr m tie top portion of the lamp 2$ Therefore, he to portion 22b of fee component does not need to be formed, of a clear ayateriai, but is kstea . formed as a light reflective ortion, The light reflective portion caa comprise a light reilecfive notorial- e.g., a light reflective plastics material, -Alternatively the reflector can comprise a metallic com onent or a component with a meta feaiion surface.

l¾e dif&ser portion.22a provides a diftuser that is integrated within the rest of the ktegraied wavelength eoaversio . component 10. This means that the lighting arrangement 100 does aot .need to include my other separate dillaser in order to diffess the light that is emitted fern the wavelength eotrversi s portion 2§. The shape of the dif&sser _. portion 22s contributes greatly so the ilnal. emissions characteristics of the _. h ^' ghtiag arrangement 260. li&Iike the previously described. embodiments, the current enrnodiment of the component 1ft is configured sach thai dilfuaer portion. 22a includes both a carved lower portion and relati vely vertical side portions.

FIGS. 16A-B i?A-B _: !8A-B _; 19A-B _S 20A*B, and ^' 21A-B illustrate xamples of different shapes that can be used for tire integrated component 10 s the sa kee mountahle linear lamp 2bl, FIGS. A-B illustrate an enrbodimeni where the diffuser portion. 22a includes both a curved lower portion and relatively vertical side portions. la addition, channels 212 are formed hi the c m onent 1ft to receive th heat sink and/or eircnit board 160. The emfeodt eat of FIGS. I7A-B is very similar to the embodiment of FIGS. 16A-B, except that chaaaeis 212 are not integrally formed in the component 10, This approach would therefore need art alternate way to mount the circuit board 160 to the component 18. e.g., with an adhesive or mooatiag screws.

FIOS. ISA-B illustrate as embodiment wbere the component 10 has smaller heights for the ^• vertical side wails of the diffuser portion 22a. This creates a. secU nal profile for the component 10 that is relatively wider is the lateral dissension, but relatively narrower ia the vertical dimension. In contrast, FIGS.. !0A~B provides an embodiment where the component 10 has larger heights for the vertical side walls of the difibser portion 22a, TIas creates a sectional profile- ip the eompoaeni S.ft that is relatively larger m the vertical dimension as compared to the vertical dimension.

FIGS. 20A-S illo^txate an approach where the bottom portion of the d ffuses- portion 22a possesses: a sigmfiearrt!y greater earvatnre to its profile. This greater curvature is ia eo-mbiaatioa with very small, heights for t e side vertical wails.

FIGS, 21A-B illustrate &a approach which, minimises arid or completely eliminates the side vertical walls, is this approach, most of the wall len th for the component is configured as a curved, diffuser portico 22 with only a ver s all por ios 22b formed Bea She wavelength conversion portion 20,

FIGS. 22A-!> illustrate an alternative surface rnotm ahie wraparound linear lighting •srrangeraeat 268 according to erabPdimeais of the bxveatioa. The surface motmtsb!e lightin arraagetaeftl $# includes aa integrated, waveieagth conversion cosnponeai HI as illustrated m FIGS, 23A-B, As before, tbe Integrated wavelength, coaversioa e«mpoaeat 10 is loane as as integrated strustare that includes differed portions having different physical and/or optica! properties. Tbe integrated wavelength component 10 iaeludes a wavelength conversion portion 20, a diffuser portion 22 aad light reflective portions 22b. The wavelength eonyersiaa component 10 composes a profile formed as a continuous wall, aad certan portions along the lengths of the wall correspond to the wavelength eoaversie* portion ^' 20,. dif&ser -poftlon 2.2a, aad .reflective portions 22b. Tie lighting arrangement 60 further includes a body 38 , cad caps Z substrate t aad. a teat sink. 210. The substrate 1611 contains aa army of LEDs 21 aad is affixe to the heat sink 210- As indic ted ia FIG, 33B tbe oorapoaeat 10 can include slots 212 to receive tbe substrate 160 and/or ihs heat sia¾. 210. The Body 300 caa be fo med nf ^' my sratable materi !, e.g., extruded alnmiaam or a thermoplastic. The component .1.0 is mounted within a body 300. It caa be aoted that body 300 is eoorlguml to cover all except .for certain portions of the component 10 (e-g,. bottom portion). This prevents the direct emission of light from lamp 260 except in. aa uncovered direction (eg,, m a generally downward direction). One reason for this type of configuration is to avoid having the lamp produce excessive amounts of visual glare to the users ia lateral direetioos. Another advantage provided by body 300 Is thai it caa lunction as a beat sink for the wraparound light. The body 300 can further comprise one or more slots or apertures or other fixing arrangeaa.ertia for rsouatkg the lighting arrangement to ceiling or wall. Alternatively, sad/or in addition, the end caps 29 caa include fixing atTaa.geme.afs for raotmtirsg the lighting arrangement-

^' The component 10 cm. .ferther include integrally formed shoulders at the jnactidn between. the diffusive and reflective portions 22a, 22b that run along the length of the component. Such shoulders can be configured to cooperate with the inner surface of the body 300 to thereby permit the component 10 to be mounted to the body 308 wit a snap fit.

In the current embodiment the component 10 and body 300 are configured such that the light reflective portions 22b of the component in conjunction with the body 300 define an internal volume 282 along the length of each edge of the lighting arrangement for housing a power supply 200 or other driver circuitry. The lighting arrangement 260 is assembled by mounting the power supply 200 within the body 300 and then mounting the LED lighting arrangement within the body 300 and applying the caps 29 to each end.

Some embodiments pertain to wraparound linear lighting arrangements where the wavelength conversion and top portions are integrally formed, but the bottom portion comprises a separate component These different portions may be manufactured using any suitable manufacturing approach. For example, all of these portions can be extruded (with some portions eo-extruded), and/or where some of the portions are not extruded but are instead manufactured using a different manufacturing approach (e.g., vacuum molded).

FIGS. 24A-E illustrate a further surface ountable wraparound linear lighting arrangement 260 according to embodiments of the invention and an integrated wavelength conversion component 10. FIGS 2SA-B illustrate an integrated wavelength conversion component 10 for use in the lighting arrangement of FIGS 24A-E. As before, the integrated wavelength conversion component 10 comprises a wavelength conversion portion 20, a diffiiser portion 22a, and light reflective portions 22b. In contrast to the earlier embodiments the wavelength conversion 20 and light reflective portions 22b are integrally formed and the diffoser portion 22a comprises a separate manufactured component, In this embodiment the light reflective portions 22b constitute the body of the lighting arrangement eliminating the need for a separate body as in the previous embodiment of FIGS 22A-D. The diffusive portion 22a and/or light reflective portion 22b are preferably manufactured from acrylic. The lighting arrangement 260 further includes caps 29, substrate 16Q and a heat sink. 210. The substrate 160 contains an array of LEDs 21 and is affixed to the heat sink 210.

The light reflective portions 22b can further comprise one or more slots or apertures or other fixing arrangements for mounting the lighting arrangement to ceiling or wall. Alternatively, and/or in addition, the caps 29 can include fixing arrangements for mounting the lighting arrangement.

In the current embodiment the internal volume 1 of the component IS can be used to house a power supply 21)0 or other driver circuitry. The lighting arrangement 260 is assembled by mounting the power supply 200 within the component 10 and then mounting the diffuser portion 22a to the component 10 and applying the caps 29 to each end of the arrangement. The diffusive portion 22a and light reflective portions 22b can include features enabling them to be secureably attached to each other by for example a snap fit. In the embodiment illustrated the light reflective portions 22b can be substantially rigid and the light diffusive portion 22a can be resiliently deformable enabling insertion of the light diffusive portion 22a by mechanical flexing.

An advantage of having the component 10 in two pails (i.e. portions 20, 22b and portion 22a) is that this enables the mounting and electrical connection of the power supply 200 within the lighting aiTangement. Another advantage of this approach is that its provides a way for installation and/or maintenance personnel to access the interior of the lighting arrangement, while still allowing the final arrangement to be assembled to have a closed-wall profile. Furthermore, the arrangement of FIGS. 24A-E is significantly cheaper to produce since it only comprises so few components: a wavelength conversion component 10 (composed of two parts), caps 29, LEDs 21, 160 and optionally a heat sink 210. in this embodiment it will be appreciated that wavelength conversion component not only provides light generation and distribution it additionally provides an electrical enclosure for the LEDs and power supply. Such a lighting aiTangement is believed to be inventive in its own right.

Another advantage of having the components separately manufactured is that this approach permits individually formed combinations of selectable properties for the top portions relative to the selectable properties of the bottom portions. For example, the integral top portion /wavelength conversion portions may be manufactured such that the top portion 22b for a first variant is clear while a second variant is reflective. Meanwhile, the bottom portion 22a is manufactured in a first variant to include diffuser materials, while a second variant does not include diffuser materials. This permits a first combination where the top portion is . clear while the bottom, portion comprises a diffuser, a second combination where the top portion is clear while the bottom portion is without diffuser, a third combination where the top portion is reflective while the bottom portion comprises a diffuser, and a fourth combination where the top portion is reflective while the b tom portion is without a diffuser.

Task lighting arrangements

The invention can also be applied to implement task lights, which can be mounted in any location to provide task lighting. For example, task lights can be mounted in an under- cabinet location to provide lighting at a counter or desk location. FIGS. 26A-D illustrate a task light 290 according to some embodiments of the invention. FIGS 27A-B illustrate an, integrated wavelength conversion component 10 for use in the lighting arrangement of FIGS 26A-D. Similar to the other embodiments described herein, the task light 290 includes an integrated wavelength conversion component 10 that includes a wavelength conversion portion 20 having one or more photolumineseenee materials which absorb a portion of the excitation light emitted by the LEDs 21 and re-emit light of a different color. In the current embodiment, the top portion 22b of the component is formed as a reflector portion comprising a light reflective material, e.g., a light reflective plastics material. Alternatively the reflector can comprise a metallic component or a component with a metallization surface. The integrated wavelength conversion component 10 also includes a diffuses- portion 22a that is integrally formed into the component 10.

The component 10 is mounted within a body 300. It can be noted that body 300 is configured to cover all except for certain portions of the component 10 (e.g., bottom portion). This prevents the direct emission of light from lamp 290 except in an uncovered direction (e.g., downwards dkeetton). One reason for this type of configuration for the task light 290 is to avoid having the lamp produce excessive amounts of visual glare to the users in lateral directions. Another advantage provided by body 300 is that it can function as a heat sink for the task light 290. Body 300 can be formed of any suitable material, e.g., extruded aluminum or thermoplastic.

The task light 290 includes wavelength conversion component end caps 29, and substrate 160. The substrate 160 contains an array of LEDs 21 and is affixed to the body 300. Mounting screws 31Θ are used to mount the end caps 29 to the body 300.

The component 10 can be formed w ^: ith shoulders 320 integrally formed along the edge of portions 22h to cooperate with corresponding channels 330 in body 300. This permits component 1 to be mounted to the body 300.

It is envisioned that in a typical application of a task lamp the integrated wavelength conversion component 19 has a width w (i.e. a dimension in a direction orthogonal the direction of elongation of the component FIG, 27A) of about one point six inches (1.6"). FIGS. 28A~I> illustrate a task light 29Θ according to some embodiments of the invention. FIGS 29A-B illustrate an integrated wavelength conversion component 10 for use in the lighting arrangement of FIGS 28Α-Ϊ). The task light 290 is very similar to the embodiment of FIGS 26A-B except that the wavelength conversion component 1.0 is mounted to towards one lateral edge of the housing 300. As indicated in FIG 28D the housing 300 can include an integrally formed channel 332 to facilitate mounting of the task light to a mounting bracket (not s ows),

FIGS. 3.IA-C illustrate- & mini task light 340 according to seine OT odisients of the layention. FIGS 31A-8 illustrate m integrated waveiengib cpnvmk>& componen 10 for use in the mkri task light 340 of FIGS A-C. Similar to the the emM ents descr bed bereia _> the -mini, task light 3 include m mi rated wavelength. com¾rsioa component 10. that includ s a wavelength conve sion portioa 2 ha n one or more phoioinmineseence materials which absorb a portion of the exeitsbori. light eai ded by the LEDs 21 and re»enrit light of a different color. la contrast to the earlier embodi»¾ea½i the wavelength conversion co&pooem 10 h solid rather than .hollow. The to portion 22b of tike com onent Is tbnned as 8 reflector portion comprising a light infective material,, e.g., * lighi reflective plastics material Alternatively, the reflector 22b can comprise & metallic com ne t or a component with, a meta ri^tion surface. The integrated wavelength conversion component 10 also inolodes a. difiltser portico. 22a thai is integrally formed into the component 10 and folly fills the vohune :H. la other embodiments the portion 22a can be light traBsnussive and a light diffusive layer and/or coating be provided oa tbe MgM sw&ce of the component Such a light diffusive layer can converttentiy be integrally formed, -as a bather eo-exhuslon dnriag manufacture of the component.

The compoacm 10 is mounted within a body 300. it cm ^' be noted that body 380 is configured to cover all except for certain portions of the component .!# (e.g. _s bottom portion). This p e ents the direct emission of light tern lamp 290 except i» an nscovered direction (e.g.* downwards direction 13). Oao reason, for ihk t e of caafig ratioc for the mini task light 340 is to avoid having the lamp produce excessive amdontg of visfcai glare to the users .in lateral directions. Anob.er advantage provided by body 300 is that if can function as a heat sink for ibe mini task light 340; Body 300 can he fomied of my suitable material e.g., extruded aluminum or thermoplastic.

The .rami task light 340 melndea wavelength conversion component ead caps 20. and substrate 100V The substrate 100 contains an array of USDs 21 and is affixed to the body 308. Mounting screws 310 are used to mount die end caps 20 to the body 300,

The component 10 cars be .formed with shoulders 320 integrally formed slong the edge of portions 22b to cooperate with the inner suria.ee- of the body 300. Th s permits component 10 to he mounted to the body 300.

t is envisioned tbai in & typical a plication of a mini task lamp 340 the integrated wavelength conversion componen 10 ^' has a width w (i.e. a dimension in a direction orthogonal the direction of elongation of the compon nt: FIG, 31 A) of about zero poin six laches (0.6"), Any of the disclosed, -embodiments may imhxte addidonal structures along portions of the integ a ed component W to provide desir d! emission characteristics. For xam le, as shown •in. the su face moantab!e lightin an¾«geme»i ^' of FIG. a series of ridges a-tsd or features 285 can be formed iato portion 22a of the -component 10 to effect a desired emission characteristic; of the lighting s ti$& t la one embo iment, for exam le, a Fresaei leas may be formed into the component 10. The use of optical structures Csneh as Fresnei and other leas shapes) in the clear plastic can. be used, for example, to create ptical beam control from ^' the lamp. The exact lighting efteei to be achieved is based at least in part upon the size, shape, and/or distance of the feature from the LEO array, as well as foe shape of the optical lens, li the component !(t is nsamtiactnred using m exKmioa process, then the exact spacing of these features can be controlled by ihe extrusion equipment to essentially form a fixed lens assembly, in other ea bodimeats a flexible sheet diffuse? and/or FresneJ lens cm he inserted into die internal volume 11 of the wavelength conversion component.

In the foregoing specification, the inventio has been described with reference to specific embodiments thereof It will, however, be evident tha various modifications and changes may be made thereto without departing iron? the broader spirit and scope of the invention. The specification and drawings re, accordingly, to be regarded in as _. illustrative rather than restrictive sense, la addition, an ilhsstoded embodiment need not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with s particular embodiment is not necessarily limited to that embodiment and can be practiced in any other embodfments eves .if not so iliasteted. Also, reference tfoonghoai tins specification to "some erobodixneats" or "other embodiments" nreaas that a particular feature, structure, material, or characteristic described in connection with the embod»»eitts is included in at least one embodiment Thas, the appearances of the phrase ¾. some embodiment" or ^ff la other e bo iments* in varions places throughout tins specifteaifon are not necessarily referring to the same embodiment or embodiments.