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WO/2007/147722A1 |
The invention relates to a device and a method for operating a high-pressure discharge lamp (1), said device comprising a voltage transformer (WR) for generating an alternating load current for the high-pressure discharge lamp (1), and a...
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WO/2007/142947A2 |
A lighting device comprising a group of one or more illumination solid state light emitters, a reference solid state light emitter and a reference sensor which detects an intensity of the reference solid state light emitter. Each of the ...
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WO/2007/141562A1 |
A frequency adaptive ballast is disclosed for operation of a glow discharge lamp. An optimum operation frequency for a ballast is found that gives maximum radiation intensity of the lamp, namely by measuring the intensivity of emitted ra...
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WO/2007/141237A1 |
A spiral pulse generator is used to start a high-pressure discharge lamp and is accommodated directly in the external bulb of the lamp. The spiral pulse generator comprises two parts which are manufactured jointly as an LTCC component.
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WO/2007/141242A1 |
A spiral pulse generator is used to start the high-pressure discharge lamp, and is accommodated directly in the outer bulb of the lamp. The spiral pulse generator uses a material with a matched ε and µ.
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WO/2007/140709A1 |
A combined type self-ballasting strip lamp including a luminous tube receptacle (1), luminous tube end covers (11), a luminous tube element (6) and a ballast. The ballast is divided into two parts, i.e. the left ballast circuit board (91...
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WO/2007/141676A1 |
A method is described for driving a lamp with a periodic signal (L) having a frame period (tl3-t11), the periodic signal (L) being a block-shaped signal during an ON- interval (t11 to t12) of said frame period and being zero during an OF...
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WO/2007/141674A1 |
An illumination device comprising a display unit (1), and a display driver (3) adapted to receive a video signal (4) and to control a video output of said display unit based on said video signal, comprising an illuminator unit (2) compri...
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WO/2007/138549A1 |
A lamp driving circuit (10) for operating a discharge lamp has a series arrangement of a first and a second switching device (Q1, Q2) connecting supply voltage input terminals. An inverter resonant circuit (20, 30) shunts one of the swit...
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WO/2007/138969A1 |
Upon start, a discharge lamp operation device alternately outputs a section A during which a DC/AC inverter (5) outputs a high-frequency voltage so that a start circuit (6) applies a high voltage to a high-luminance discharge lamp (7) by...
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WO/2007/138553A2 |
In a lamp driving circuit for operating a high intensity discharge lamp, an a commutation circuit comprises at least two switching devices. The switching devices are alternately switched active at a commutation frequency. The active swit...
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WO/2007/138237A1 |
A lamp ballast circuit for a high intensity discharge lamp (11) switches alternately between dual buck converters (1, 4, 5 and 2, 3, 6) connected in a half bridge arrangement to supply alternating current to the lamp (11). An inductor (8...
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WO/2007/138507A1 |
In an application of a gas discharge lamp (La) arranged at a relatively large distance from its driving lamp driver circuit, parasitic capacitances (CGR,1, CGR,2) between the wiring (W1, W2) and ground may result in a current flowing to ...
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WO/2007/139107A1 |
It is possible to provide a fluorescent lamp operation device capable of increasing the possible number of ON/OFF times to 20,000 times or more in a 3-minute cycle (ON for 10 seconds and OFF for 2 minutes and 50 seconds) service life tes...
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WO2007107447A9 |
The present invention relates to an electronic ballast for operating a lamp (L) which has a Class E converter (T1, L1). When a lamp (L) is connected, the output current of the Class E converter (T1, L1) once a switching element (T1) of t...
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WO/2007/132369A2 |
The invention describes a method of shutting down a high pressure discharge lamp (1) in which a pair of electrodes (2) is disposed in an arc tube (3), which method comprises reducing, upon receipt of a shut-down request (SR), the lamp po...
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WO/2007/132402A1 |
A safety starter circuit for a gas discharge lamp is described, comprising a series arrangement of: a glow switch starter (5); at least one resistive element (9); a thermally controlled switching element (8). The thermally controlled swi...
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WO/2007/132543A1 |
Disclosed is a cold cathode lamp comprising a light-transmitting insulating tube (1), first and second internal electrodes (2, 3) arranged inside the insulating tube, first and second external electrodes (4, 5) arranged outside the insul...
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WO/2007/132542A1 |
Disclosed is a cold cathode lamp comprising a light-transmitting insulating tube (1), first and second internal electrodes (2, 3) arranged inside the insulating tube, first and second external electrodes (4, 5) arranged outside the insul...
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WO/2007/129875A1 |
Embodiment relate to a lamp driving device and a liquid crystal display device having the same. The embodiments include a plurality of lamps having first and second electrodes, an inverter substrate supplying a high voltage alternating c...
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WO/2007/129490A1 |
The capacitor (42(C1)) of a first bootstrap circuit (4) for sustaining in on state the first switching element (61) on one side, out of two switching elements arranged on the high potential side of a first DC voltage (V1), in on state is...
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WO/2007/128472A1 |
The present invention relates to a control system (100) for controlling a gas discharge system (10), the lamp control system (100) comprising a detection means (102) for detecting a physical parameter such as e.g. an optical parameter fr...
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WO/2007/129506A1 |
A pair of internal electrodes (2a, 2b) are disposed at both ends of a lamp (1). A first voltage, in which a positive DC voltage (Vb) is superimposed on a substantially rectangular waveform voltage (Va), is applied to one of the internal ...
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WO/2007/126737A2 |
A ballast (11) includes a variable output DC converter source (12) and an inverter circuit (14) arranged to provide AC output voltage to an electro-luminescent (EL) lamp (16). A Q factor of EL lamp can characterize the age of the EL lamp...
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WO/2007/127070A2 |
A gas discharge lamp has a gas and has a cathode, an anode, and an ignition electrode. Individual discharges of a series of lamp discharges are spaced at least one millisecond from each other, and the individual discharges are generated ...
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WO/2007/124615A1 |
An electronic driver for a fluorescent lamp adopts a high-frequency energized and active PFC circuit so as to obtain 99 percent of the power factor. The range of input mains voltage can reach 90 - 300V and it is applied in the internatio...
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WO/2007/125804A1 |
A PWM generating circuit generates a PWM pulse signal having a variable duty ratio in order to control the luminance of backlight. An edge detecting circuit outputs a rising edge signal in response to the rising edge of the PWM pulse sig...
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WO/2007/125704A1 |
A dielectric barrier discharge lamp ignition device in which one ignition circuit carries out parallel ignition of a plurality of dielectric barrier discharge lamps is comprised of twenty four dielectric discharge lamps (1) and an igniti...
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WO/2007/125839A1 |
From the individual small areas (9B1 to 9B5) of a conductor pattern (9B) arranged on the back side of a circuit board (7), there are individually extended outgoing wiring patterns (10), which are midway led by through holes (11) to the s...
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WO/2007/125706A1 |
An electrodeless discharge lamp device comprises an induction coil for producing a high-frequency electromagnetic field when supplied with high-frequency electric power and thereby exciting the discharge gas, a pair of generally semicyli...
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WO/2007/121840A1 |
A dimmable electronic ballast for gas discharge lamps incorporates: - an electronic control unit (5), which is designed to selectively trigger the operation of a connected lamp according to at least the following operating modes: a.) abo...
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WO2006111120A9 |
The invention relates to an electronic ballast comprising a converter which is used to operate a discharge lamp, for example, a low pressure discharge lamp, for selectively operating, in a direct manner, the supply network or a phase sec...
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WO/2007/122559A1 |
The present invention provides a voltage signal output circuit, comprising: a resonance unit for generating a first voltage and a second voltage with respect to a reference potential; a phase shift unit, coupled to the resonance unit, fo...
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WO/2007/122114A1 |
The invention relates to an arrangement having a high-pressure discharge lamp (1) and an electronic ballast (2), wherein the ballast (2) is integrated in the high-pressure discharge lamp (1) and has a protection and monitoring apparatus ...
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WO/2007/123387A1 |
A method and an apparatus for controllably operating a gas discharge lamp in an electrical circuit containing an electromagnetic ballast and at least one electrical device selected from the group which includes a variable-impedance elect...
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WO/2007/121824A1 |
The invention relates to a superimposed-type ignition device (ÜZG) for igniting a high-pressure discharge lamp (LA) which is operated with an alternating current and which comprises a control circuit (TS) for operating the superimposed-...
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WO/2007/121837A1 |
The invention relates to a superimposed-type ignition device (ÜZG) which is equipped with a high-frequency pulse transformer (Tr) and which is used to ignite at least one high-pressure discharge lamp (LA). The transformer (Tr) comprises...
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WO/2007/120001A1 |
Provided are a pulse width modulation (PWM) apparatus and a light source-driving apparatus including the PWM apparatus. The PWM apparatus includes a voltage division part, a capacitor part, a first operational amplifier, a first noise re...
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WO/2007/118808A1 |
The invention relates to a circuit arrangement for operating a discharge lamp (LA) comprising an inverter, which at its output provides a signal (SD) with a preselectable frequency; at least one lamp inductance (LD) between the output of...
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WO/2007/119510A1 |
A projector comprises an alternating-current-drive lamp, a rotating color wheel which includes color segments for transmitting color lights and is disposed in an optical path from the lamp, the color segments including a transparent segm...
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WO/2007/119457A1 |
A discharge lamp operation device includes: a DC power source (2) for supplying a voltage higher than a discharge lamp glow voltage; a down converter (3) for converting to lower to the discharge lamp operation voltage; a calculation circ...
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WO/2007/118834A1 |
The invention relates to a ballast (1) for operating an electric lamp (2), in particular a discharge lamp, which is arranged for illuminating a display apparatus (3), having a control unit (11) for controlling the ballast (1), characteri...
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WO/2007/119189A1 |
The present invention proposes a circuit for detecting the function status of a lamp having at least one electrode, which circuit comprises: a voltage divider having a middle point, for outputting a voltage signal reflecting the function...
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WO/2007/116349A1 |
A method for dimming an illumination system (20) capable of emitting light (L) with a variable color is described. The illumination system (20) comprises three dimmable light sources (21, 22, 23) generating respective lights (L1, L2, L3)...
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WO/2007/116016A1 |
An electronic ballast is disclosed, in particular for operation of gas-discharge lamps, in which a further power semiconductor is provided in addition to the conventional power semiconductor, and provides the power required for steady-st...
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WO/2007/117011A1 |
A lighting device of discharge tube comprising a first inverter, a second inverter outputting a voltage of opposite phase to that of the first inverter, a discharge tube connected between one output terminal of the first inverter and one...
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WO/2007/113433A1 |
The subject of the invention is a device for fitting and removing a starter used in the implementation of a fluorescent lamp, characterized in that it consists of two elements connected together, one consisting of a means (2) for shroudi...
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WO/2007/112529A2 |
The high frequency pulsed supply for discharge lamps describes electronic converters for discharge lamps with high frequency pulsed current stablilization. A voltage inverter is employed either in a Full-Bridge configuration (51,52,53,54...
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WO/2007/113745A1 |
A method for driving a lamp with a variable duty cycle in a timing relationship with an input image signal (Si) comprises the steps of: receiving the image signal having a predetermined frame period (t3-tl); generating a high-frequency i...
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WO/2007/110125A1 |
The invention relates to the operation of an operating appliance for lighting devices, especially an electronic ballast for gas discharge lamps. The lighting device is controlled by the output of control signals of a digital control circ...
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