Field of the Invention

The present invention relates to illumination device and in particular relates to a light emitting diode (LED) based illumination device implemented with electronic circuitry, battery, etc.

Background of the Invention

Approximately 500 million people in India still have no access to electricity. Having no access to electricity, rural areas use kerosene lamps at night for indoor lighting and for miscellaneous tasks outside the home. However, such source of light has several associated drawbacks like emission of hazardous exhaust gases and un-burnt carbon particles, insufficient illumination, short illumination period per refill etc.

To obviate such drawbacks, solar energy powered illumination devices are well known in the art as a portable light source. These are extremely useful in areas where the electricity is scarce or remote rural, hilly, forests areas. It is also useful in urban homes as an emergency light during power outage. Such solar powered devices are advantageous over petroleum based light sources in terms of being eco-friendly, portability, easy maintenance and upkeep, longevity, etc.

However, both the petroleum powered as well as solar powered illumination devices fall short on illumination quotient as far as common man is concerned. In case of specially designed illumination devices for high illumination, the manufacturing expenditure associated with the same is high and proves cost-ineffective for public at large. Besides, the existing illumination devices can be used for only for specific purposes and are not scalable to perform other ancillary functions. Furthermore, the current illumination devices when used as a portable device or while being transferred from one place to another are more prone to develop cracks due to induction of bending torque.

Thus, the limited usability, durability and comparatively high manufacturing cost associated with the current illumination devices render these as cost ineffective.

Summary of the invention

An LED based illumination device is disclosed. The device comprises of a hollow housing defined by top and bottom surfaces of quadrilateral shape and plurality of lateral surfaces connecting said top and bottom surfaces. A power supply unit is located within the housing, where the power supply unit comprises a power source and an electronic circuit controlling the power source. A LED based lighting structure is connected to the power supply unit and located on the top surface of the housing. A transparent member is connected to the top surface of the housing and covers the LED based lighting structure. A first handle is provided on a lateral surface of the housing and a second handle is provided on a bottom surface of the housing. At least one switching device is located on a lateral surface adjacent to the lateral surface having the first handle.

An LED based illumination device is disclosed. The LED based illumination device comprises a hollow housing defined by top and bottom surfaces of quadrilateral shape and a number of lateral surfaces connecting said top and bottom surfaces. A power supply unit is located within the housing, where the power supply unit comprises a power source and an electronic circuit controlling the power source. A LED based lighting structure is located on the top surface of the housing and connected to the power supply unit. A transparent member is connected to the top surface of the housing and covers the LED based lighting structure. The LED based lighting structure comprises three rectangular plates arranged so as to form a triangular column and a triangular plate located on top of the triangular column. Each of the said rectangular plate comprises a plurality of LED's mounted thereupon and the triangular plate comprises at least one LED mounted thereupon. The lighting structure also comprises a diffuser surrounding the triangular column.

An LED based illumination device is disclosed. The LED based illumination device comprises a hollow housing defined by top and bottom surfaces of quadrilateral shape and plurality of lateral surfaces connecting said top and bottom surfaces. A power supply unit is located within the housing, where the power supply unit comprises a power source and an electronic circuit controlling the power source. A LED based lighting structure is located on the top surface of the housing and connected to the power supply unit. A transparent member is connected to the top surface of the housing and covers the LED based lighting structure. The LED based lighting structure comprises a column having a plurality of LED's mounted thereupon and a diffuser surrounding the column. The diffuser has an open bottom end, a closed top end and curved lateral surface joining the bottom and the top ends. The curved lateral surface has first set of grooves running along external periphery at regular intervals of distance and a second set of grooves running along internal periphery at regular intervals of distance.

Brief Description of the Accompanying Drawings:

To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings in which:

Figure 1 illustrates a first side perspective view of a multi utility LED illumination device in accordance with an embodiment of the invention;

Figure 2 illustrates a second side perspective view of the multi utility LED illumination device in accordance with an embodiment of the invention;

Figure 3 illustrates a top perspective view of the multi utility LED illumination device in accordance with an embodiment of the invention;

Figure 4 illustrates a human hand holding the multi utility LED illumination device of the present invention using the first handle provided on the lateral surface and the location of the operating switches with respect to the said first handle, in accordance with an embodiment of the invention;

Figure 5 illustrates a human hand holding the multi utility LED illumination device using the second handle provided on a bottom surface, in accordance with an embodiment of the invention.

Figure 6 illustrates an isometric view of a lower half of the housing of the multi utility LED illumination device, in accordance with an embodiment of the invention.

Figure 7 illustrates an isometric view of a second handle of the multi utility LED illumination device, in accordance with an embodiment of the invention.

Figure 8 illustrates an isometric view of a battery cover implemented within the housing of the multi utility LED illumination device, in accordance with an embodiment of the invention.

Figure 9 illustrates isometric views of an upper half of the housing of the multi utility LED illumination device, in accordance with an embodiment of the invention.

Figure 10 illustrates an isometric view of a base plate to mount the LED lighting structure of the multi utility LED illumination device, in accordance with an embodiment of the invention.

Figure 11 illustrates an isometric view of a transparent member of the multi utility LED illumination device, in accordance with an embodiment of the invention.

Figure 12 illustrates an isometric view of a diffuser of the multi utility LED illumination device, in accordance with an embodiment of the invention. Figure 13 illustrates schematic views of different sets of grooves provided within the diffuser of Fig. 12, in accordance with an embodiment of the invention.

Figure 14 illustrates a schematic view of a LED lighting column of the multi utility LED illumination device, in accordance with an embodiment of the invention.

Figure 15 illustrates a schematic view of mounting of LEDs over the LED lighting column of Figure 14, in accordance with an embodiment of the invention.

Figure 16 illustrates a circuit diagram of an electronic circuit implemented within the multi-utility illumination device, in accordance with an embodiment of the invention.

It may be noted that to the extent possible, like reference numerals have been used to represent like elements in the drawings. Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have been necessarily drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help to improve understanding of aspects of the present invention. Furthermore, the one or more elements may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

Detailed Description of the Invention

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.

It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the invention and are not intended to be restrictive thereof. Throughout the patent specification, a convention employed is that in the appended drawings, like numerals denote like components.

Reference throughout this specification to "an embodiment", "another embodiment" or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such process or method. Similarly, one or more devices or sub-systems or elements or structures proceeded by "comprises... a" does not, without more constraints, preclude the existence of other devices or other sub-systems

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

Figure 1 illustrates a first side perspective view of a multi utility LED illumination device 100, hereinafter referred to as device 100, in accordance with an embodiment of the invention. The device comprises a hollow housing 105 defined by top and bottom surfaces of quadrilateral shape and a number of lateral surfaces connecting said top and bottom surfaces. A power supply unit (not shown in the figure) is located within the housing 105, and a LED based lighting structure 110, hereinafter referred to as the lighting structure 110, is located on a top surface of the housing 105 and connected to the power supply unit. The power supply unit includes a power source and an electronic circuit controlling the power source. The power source is a power storage in the form of a rechargeable battery. For charging the battery, the electronic circuit includes a recharge-controlling sub circuit that is configured to receive electrical power from electricity mains or any solar based electrical energy producing device, for example, a solar panel. The battery, in an example, may be a lead acid battery, a Nickel metal hydride (Ni-MH), a Lithium- Ion battery, etc, for providing a long service life. A transparent member 115 is connected to the top surface of the housing 105 and covers the lighting structure 110. The transparent member 115 includes at least one surface that imparts directivity to light rays produced by the lighting structure 110.

Figure 2 illustrates a second side perspective view of the device 100 in accordance with an embodiment of the invention. As show in the figure, the housing 105 is further provided with a first handle 205 on a lateral surface of the housing 105 to enable carriage and usage of the device 100 preferably as a torch.

According to an embodiment, the housing 105 of the device 100 is designed to accommodate all assembled components near the lateral surface of the housing 105 carrying the first handle 205. For such purpose, comparatively heavier components of the device 100 like the battery, the electronic circuit of the device 100, the transparent member 115, and the lighting structure 110 are all concentrated around the lateral surface carrying the first handle 205. As a result of such kind of design of the housing 105, the extent of induction of bending torque within the device 100 is substantially reduced owing to concentration of heavier components of the device 100 near the first handle 205. Such concentration imparts rigidity and sufficient mechanical strength to the device 100 during its handling and transportation.

Figure 3 illustrates a top perspective view of the device 100 in accordance with an embodiment of the invention. As shown in the figure, the transparent member 115 firmly houses the lighting structure 110. As shown and described later in the description of Fig 12 and Fig. 14, the lighting structure 110 is an assembly of a LED lighting column and a diffuser. The diffuser surrounds the LED lighting column for diffusing the emitted light and acts as external or visible component of the LED lighting structure. In addition, the diffuser protects the LED lighting column by acting as a cover.

Figure 4 depicts a human hand holding the device 100 of the present invention using the first handle 205 provided on the lateral surface as well as the location of operating switches 405 with respect to the said first handle 205. As shown in the Figure 4, the switches 405 are located on a lateral surface adjacent to the lateral surface carrying the first handle 205. These switches 405 act as control elements for the power supply unit controlling the power source and charging the battery. In addition, the switches 405 may also be actuated to charge a mobile phone by the device 100.

According to an embodiment, the switches 405 may be actuated by a user to perform various functions like switching on/off the device 100, and illumination intensity regulations of the device 100. The illumination intensity regulation may be manifested by switching between full and half brightness. Such functions may be executed by power management performed through the electronic circuit implemented on a printed circuit board (PCB). According to an embodiment, the electronic circuit is designed vis-a-vis various state of the art components to automatically provide visual indications for low battery level, battery charging status, battery charging through a solar photovoltaic (PV) source as well as through electrical mains, a constant light output till battery discharge, and automatic switch off on battery discharge. In addition, the printed circuit board (PCB) has been specifically designed to execute an electronic efficiency of at least 80%.

In addition, to the aforesaid illumination related features, the electronic circuit also enables the device 100 to act as a power source for low voltage applications like mobile handset charging. The electronic circuit also exhibits various voltage/ current regulation functions like over current protection, over voltage protection, over charge protection, short circuit protection to protect the device 100 in emergency scenarios like abrupt voltage or current surge.

As it may be clearly inferred from Fig. 4, the switches 405 are located on a lateral surface of the housing 105 which is adjacent to the lateral surface where the first handle 205 is located. Such strategic positioning of the switches 405 may be attributed to proximity of the power supply unit to the first handle 205, thereby maintaining the proximity of heavier components (like battery, electronic circuit) to the lateral surface carrying the first handle 205. As mentioned before, such proximity of the power supply unit and the heavier components to the first handle 205 is essential for minimizing the bending torque induction within the device 100.

In addition, a second handle 410 is provided on the bottom surface of the housing 105, the bottom surface being adjacent to the lateral surface carrying the first handle 205. The position of the second handle 410 as depicted in the present figure is folded or idle. However, as depicted in the description of next figure, the second handle 410 is in active condition, owing to the second handle 410 being rotatable around the axis of the bottom surface of the housing 105 by a hinged connection. A provision or seat within the housing 105 to accommodate the second handle 410 in the folded position has been elaborated in the description of Fig. 6 and Fig. 7.

Figure 5 illustrates a human hand holding the device 100 using the second handle 410 provided on the bottom surface of the housing 105. Such provision allows the usability of the device 100 as a lantern or a hanging room lamp or bulb and allows the suspension of the device 100 from the ceiling or the wall. In addition, unlike the first handle 205, the second handle 410 is foldable when not in use and allows the bottom surface of the device 100 to rest upon its base, in case the device 100 stands in an upright position as shown in Fig 1.

Figure 6 illustrates an isometric view of a lower half 105a of the housing 105 of the multi utility LED illumination device 100, in accordance with an embodiment of the invention. As shown in the figure, the lower half 105a of the housing 105 includes various holes that may be threaded from inside to connect an upper half (shown in Fig.9) of the housing 105 through a nut-bolt mechanism, thereby completing the construction of the housing 105. The lower half 105a also includes a lower portion 205a of the first handle 205 having a threaded hole. Such lower portion 205a gets connected to an upper portion (shown in Fig. 9) of the first handle 205 by the nut bolt mechanism to complete the construction of the first handle 205 while also completing the construction of the housing 105. Further, the base of the lower half 105a is extruded to form a cavity 605 for accommodating the folded position of the second handle 410 of the device 100 by way of a snug-fit connection. In other words, such cavity 605 acts as a seat for the second handle 410 in the idle position, when the second handle 410 is in the folded state. Accordingly, in the idle state of the second handle, the cavity 605 of the lower half 105a remains occupied by the second handle 410 and the device 100 may comfortably rest upon its base and stand in the upright position. More specifically, occupation of the cavity 605 by the second handle 410 in the idle state enables the device 100 to be placed upon ground or table as shown in Fig. 1. It may be understood that the absence of cavity 605 may not allow complete folding of the second handle 410, thereby letting the second handle to always protrude from the device 100 and denying the device 100 to rest upon its base.

Figure 7 illustrates an isometric view of the second handle 410 which is attached to the housing 105 of the multi utility LED illumination device 100, in accordance with an embodiment of the invention. As shown in the figure, the second handle 410 is provided with hinges 700 for implementing a pivot connection of the second handle 410 with respect to the lower half 105a of the housing 105. Accordingly, the second handle 410 is rotatable about the axis of the lower half 105 a of the housing 105.

Referring back to Fig. 4, where the second handle 410 is shown in the folded position, it may be understood that the provision of the cavity 605 at the base of the device 100 allows the folded second handle 410 to face away from the lateral surface of the housing 105 carrying the first handle 205. This is implemented to maintain the folded position of the second handle 410 within the cavity 605 by a synergistic effect of the snug fit connection provided by the cavity 605 as well as by effect of gravity, when the device 100 is held by the first handle 205. However, such provision of cavity 605 shall not be construed as a limitation to the present invention, and the current embodiment may be extended to cover other positions of the cavity 605 as well.

Figure 8 illustrates an isometric view of a battery cover 800 implemented within the housing 105 of the multi utility LED illumination device 100, in accordance with an embodiment of the invention. Such cover is mountable over the lower half 105a of the housing 105 for receiving the battery and holding it immovably within the housing 105.

Figure 9 illustrates the isometric views of an upper half 105b of the housing 105 of the multi utility LED illumination device 100, in accordance with an embodiment of the invention. As mentioned before, the upper half 105b is superimposed over the lower half 105a to complete the construction of the housing 105. This also automatically enables the superimposition of an upper portion 205b of the first handle 205 over the lower portion 205a, thereby simultaneously completing the construction of the first handle 205 and maintaining the integrity of the first handle 205 to the housing 105.

As depicted in Figure 9a, the top of the upper half 105b of the housing 105 includes a washer shaped cavity 905 to receive a base plate (shown in next figure) to mount the lighting structure 110. In addition, the upper half 105b is provided with at least two raised platforms 810 having holes at the center to mount the transparent member 115. In addition, the lateral surface of the upper half 105b includes slots 915 for receiving the switches 405. Fig. 9b depicts the upper half 105b in an inverted position, thereby depicting the hollow interior of the upper half 105b.

Figure 10 illustrates an isometric view of the base plate 1000 to mount the LED lighting structure 110 of the multi utility LED illumination device 100, in accordance with an embodiment of the invention. The base plate 1000 includes a bore 1005 at the centre to act as passage for electrical wires from the power supply unit disposed within the housing 105 towards the LED lighting structure 110. Further, three identical linear slots 1010 are arranged over the base plate 1000 in the form of an equilateral triangle, such that the linear slots 1010 do not touch each other. These slots 1010 receive three rectangular plates (elaborated in Fig. 15) of the lighting structure 110 to form a triangular lighting column (elaborated in Fig. 14).

Figure 11 illustrates an isometric view of a transparent member 115 of the multi utility LED illumination device 100, in accordance with an embodiment of the invention. The transparent member is mounted over the upper half 105b of the housing 105 at the raised platforms 910 by a nut-bolt mechanism or any other fastening mechanism.

Figure 12 illustrates an isometric view of a diffuser 1200 employed within the device 100, in accordance with an embodiment of the invention. According to an embodiment, the diffuser 1200 has an open bottom end 1205, a closed top end 1210 and a curved lateral surface joining the bottom and the top ends. Such curved lateral surface have a first set of grooves 1215 and a second set of grooves (not visible in the present figure) running along external periphery and internal periphery of the diffuser at regular intervals of distance, respectively. In other words, the first set of grooves 1215 and the second set of grooves follow the entire curvature of the curved surface of the diffuser 1200 and each set has a unique inter-groove distance.

Further, the top end 1210 of the diffuser 1200 is convex or dome shaped and has a number of slots 1220 uniformly distributed across the circumference of the top end 1210. In an implementation, the slots 1220 are five in number. Such slots 1220 act as slits within the top end 1210 and facilitate diverging of the light as emitted from the lighting structure 110.

Figure 13 illustrates schematic views of two sets of grooves provided within the diffuser 1200 of Fig. 12. The first of set grooves 1215 have been depicted in Fig. 13a, where each groove denotes a trough between any two crests. Such shape of first set of grooves may be treated as analogous to the alphabet 'V. In an implementation, the first set of grooves 1215 has an inter-groove distance of about 23.4 mm and a radius of curvature of about 1.7 mm.

As evident from Figure 13b, the second set of grooves 1300 also denote a trough between any two crests. Such shape of second set of grooves 1300 may be treated as analogus to the alphabet 'U'. Specifically, each of the second set of grooves 1300 is formed as a flat spacing of about 0.08 mm between any two crests and bounded by such crests. The inter- groove distance is about 0.5 mm and the radius of curvature of boundaries of the second set of grooves 1300 is about 0.25 mm.

Figure 14 illustrates a schematic view of a LED lighting column 1400 present within the lighting structure 110 of the device 100. According to an embodiment, the LED lighting column 1400 is a triangular column composed of three rectangular plates and a triangular plate disposed at the top of the triangular column 1400. All of such plates act as a wall or seat for mounting LEDs 1405 for emitting light. Accordingly, the rectangular plates and the triangular plate may be electrically connected to the electronic circuit for powering the LEDs 1405.

The following table (Table 1) highlights a comparison of triangular LED lighting column 1400 with other exemplary polygonal lighting columns like cubical, pentagonal, hexagonal, etc.

Table 1

As can be observed from the Table 1, the employment of triangular lighting column 1400 minimizes the dark spot visibility due to the triangular lighting column 1400 having the minimum number of edges as compared to other polygonal columns. Further, as each employed LED 1405 emits light rays in the span of 120 degrees, the three rectangular plates of the triangular LED lighting column 1400 lead to an overall emittance in 360 degrees, such that emittance of each individual LEDs 1405 does not overlap with the emittance of the adjacent or other LEDs.

Such non-overlap of emittance from different LEDs 1405 facilitates maximum utilization of each individual LED in contributing to the overall luminance of the device 100, while the overlap of emittance in other polygonal lighting columns leads to under-utilization of the employed LEDs by causing a considerably lesser ratio of no. of employed LEDs to the overall luminance.

According to an embodiment, the present LED lighting column 1400 employs about twenty-seven LEDs 1405 uniformly distributed across the three rectangular plates and the triangular plate. However, such number shall not be construed as limitation to the invention and the present embodiment may be extended to cover other number of LEDs 1405 as well.

Figure 15 illustrates a schematic view of mounting of LEDs 1405 over the LED lighting column 1400 of Figure 14. As shown in the figure, the LEDs 1405 are arranged in a horizontal position with respect to each other on a visible rectangular plate 1500 out of three rectangular plates of the LED lighting column 1400. Likewise, other two rectangular plates may also be provided with similarly arranged LEDs 1405. According to an embodiment of the invention, the LEDs 1405 may be connected in a parallel connection with the electronic circuit and have a power rating in a range of 0.5 Watt to 3.0 Watt, with a preferable value of 2Watt.

The following table (Table 2) highlights a comparison of LEDs 1405 mounted in a horizontal position on the rectangular plate 1500 with other exemplary mounting arrangements of the LEDs 1405 on the rectangular plate 1500, such arrangements being vertical and zig zag, in terms of luminance comparison and bright spot visibility.

Table 2

As can be observed from Table 2, the horizontal mounting arrangement of LEDs 1405 corresponds to a maximum luminance level of 100 Lux at a distance of about 1 feet from the lighting structure 110. In addition, as a result of the diffuser 1200 (elaborated in Fig. 12) diffusing the light emanating from such LEDs 1405, the unwanted bright spot visibility present even after the diffusion of light is rendered negligible in case of the LEDs in horizontal mounting arrangements when compared to the other mounting arrangements of the LEDs.

Further, the triangular plate located at the top of the LED lighting column 1400 also acts a seat for one or more LEDs 1405. In case of multiple LEDs 1405 placed at the triangular plate, the mounting pattern of these LEDs 1405 is similar to the mounting pattern of LEDs 1405 placed over the rectangular plates. By virtue of such uniformly scattered LEDs over the three rectangular plates as well as the triangular plate, the overall light emanating from the lighting column 1400 propagates in 540 degrees, as elaborated later in the description of the operation of the diffuser 1200. The LEDs 1405 mounted on the three rectangular plates 1500 contribute to light propagation in a horizontal plane, while the one or more LEDs 1405 mounted on the triangular plate causes the light to light propagation in the vertical plane.

Furthermore, the rectangular plate 1500 has a wedge shaped end 1505 at the base for the purpose of insertion into the linear slots 1010 of the base plate 1000 (depicted in Fig. 10) for immovably mounting the rectangular plate 1500 over the base plate 1000. Accordingly, other rectangular plates of the lighting column 1400 are also mounted. It may be understood that although the linear slots 1010 arranged in the form of equilateral triangle do not touch each other, the wedge shaped end 1505 of each rectangular plate 1500 after insertion into each linear slot 1010 enables formation of a well enclosed triangular lighting column 1400 without any gaps at the boundary of any two rectangular plates.

In operation, the diffuser 1200 receives the light emitted from the lighting column 1400 and diffuses the light to scatter uniformly in both horizontal and vertical planes. As far as scattering in the horizontal plane is concerned, the diffuser 1200 receives the light emitted from the three rectangular plates 1500 of the LED lighting column 1400 and scatters the same in the horizontal plane in 360 degrees. The first set of grooves 1215 and the second set of grooves 1300 of the diffuser 1200 are well aligned with the horizontally mounted LEDs 1405, as both sets of grooves are also horizontally provided with respect to the axis of the diffuser 1200. Further, the radius of curvature as well as inter-groove distance corresponding to both sets of grooves disposed at the internal and external peripheries of the diffuser 1200 is such that about 85% of the emitted light from the rectangular plates 1500 gets diffused and scattered in the horizontal plane.

Further, the linear slots 1220 at the top end of the diffuser 1200 receive the light emitted from the one or more LEDs 1405 mounted on the triangular plate of the LED lighting column 1200 and cause the light to diverge approximately around 180 degrees in the vertical plane.

According to an embodiment, the material employed for construction of the diffuser 1200 is general purpose polystyrene (GPPS) and the material employed for construction of the transparent member 115 that covers the diffuser is polycarbonate (PC). The following table (Table 3) highlights a comparison of various combinations of materials employed for constructing the diffuser 1200 and the transparent member 115 and their effect upon the produced luminance levels at different values of electric current. Table 3

As it is evident from the Table 3, the combination of GPPS based diffuser and polycarbonate based transparent member enables the device 100 to produce the highest values of luminance at various current values.

Figure 16 illustrates a circuit diagram of an electronic circuit 1600 implemented within the multi-utility illumination device, in accordance with an embodiment of the invention. As mentioned before, the electronic circuit 1600 is configured to perform various functions like illumination intensity regulation, automatic visual indications for low battery level, battery charging status, battery charging through a solar photovoltaic (PV) source as well as through electrical mains, providing constant light output till battery discharge, and automatic switch off on battery discharge, over current protection, over voltage protection, over charge protection, short circuit protection to protect the device 100 in emergency scenarios like abrupt voltage or current surge, etc,.

In addition, the electronic circuit 1600 also enables the device 100 to act as a power source for low voltage applications like mobile handset charging.

Overall, as a result of the present invention, the device 100 provides bright light intensity of more than 100 Lux when a luminance sensing device, say a lux meter sensor, is kept at a distance of 1 feet from the lighting structure 110 of the device 100. In far contrast, a traditional kerosene hurricane lantern provides luminance of lesser than 50 Lux of light intensity and a kerosene lamp provides lesser than 20 lux of light. In addition, a combination of energy efficient components used in the device 100 like the type of battery, the PCB having 80% electronic efficiency, and the 0.5 Watt - 2 Watt LEDs facilitate 40% longer life of the device 100 per battery charging, when compared with the existing illumination devices.

In addition, the device 100 in accordance with the present invention is multifunctional device and has exemplary illumination related applications as a room lamp, a portable lantern, a hanging bulb, a torch, etc,. In addition, the present device 100 also functions as power storage for low voltage applications like mobile charging.

Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any component(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or component of any or all the claims.

While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.