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WO/2008/101764A1 |
The present invention provides a charge pump electronic ballast for use with low input voltage. Said charge pump electronic ballast comprises a DC/AC inverter circuit composed of two switching transistors, a resonant circuit composed of ...
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WO/2008/102703A1 |
A burst light adjusting signal is inputted to decide the ratio between an ON period and an OFF period. During the OFF period of the burst light adjusting signal, a lamp current (Ila) of a discharge lamp (FL) is stopped while applying a l...
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WO/2008/101836A1 |
The invention discloses a method and/or electronic ballast, which can be universally used for a plurality of types of discharge lamps and which performs an orientation mode for detecting the lamp type once the lamp is switched on, whereb...
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WO/2008/099329A1 |
A driver (10) for driving a gas discharge lamp (L) comprises a current generator (1; 2) for generating a lamp current with a main lamp current component and, for arc-straightening purposes, a ripple current component. A controller (3) co...
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WO/2008/098881A1 |
Disclosed is an ignition transformer for a discharge lamp, comprising a transformer core. The material and the size of the transformer core are selected such that following the ignition by means of the ignition transformer, the Curie tem...
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WO/2008/096306A1 |
A method is described for driving a lamp (L), specifically but not necessarily a gas discharge lamp. The lamp is driven with a pulse width modulated lamp current. The lamp current frequency is a constant frequency (fref) modulated with a...
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WO/2008/095343A1 |
A sleeve-shaped daylight lamp shape includes a sleeve (1), a lighting tube (2), an inductance assembly (3) and a primary control circuit board (4). The lighting tube (2), the primary control circuit board (4) and the inductance assembly ...
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WO/2008/092501A1 |
The invention relates to an electronic operating device for the incremental dimming of one or more lighting devices, wherein the operating device has two or more gate inputs, which may be conducting or non-conducting, and wherein it dims...
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WO/2008/093229A1 |
The invention concerns an electronic ballast for a HID lamp comprising: a rectifier circuit; a PFC power factor correction circuit which increases the direct current (CD) voltage output from the rectifier circuit; a current converter cir...
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WO/2008/093587A1 |
Provided is a cold cathode tube lighting device capable of suppressing irregularities of luminance of the emitted light caused by the emission position. The cold cathode tube lighting device includes: a plurality of discharge tubes (1) c...
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WO/2008/093259A1 |
A driver (1) for driving a gas discharge lamp (2) comprises: - a current source (3) generating lamp current, having a setpoint input (4) for receiving a setpoint signal; - a controller (10) generating a current setpoint signal (SM); - a ...
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WO/2008/090722A1 |
A liquid crystal panel module of a liquid crystal display device includes a liquid crystal display panel inside a metal frame on its front side and also includes an EEFL backlight on the rear side. A metal chassis is placed on the metal ...
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WO/2008/089839A1 |
When operating a discharge lamp, an ignition burst should be generated safely independently of tolerances of the load circuit components. For this purpose, a circuit arrangement having a freely oscillating half-bridge inverter is provide...
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WO/2008/086892A1 |
The invention relates to a circuit arrangement and to a method for starting and operating one or more discharge lamps, comprising a free-running inverter, a resonance circuit, a low-pressure discharge lamp, a starting voltage controller,...
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WO/2008/087844A1 |
A dimmer outputs an on voltage at which a switching unit (204) at a control section (200) switches an illumination unit (205) to a lighting state or an off voltage at which it is switched to an unlighting state as a control signal being ...
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WO/2008/083855A1 |
The invention relates to a method for determining a crest factor of a lamp current of an electric lamp (2), in which at least one operational variable of the lamp (2) is set, wherein a desired value is predetermined for the operational v...
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WO/2008/083852A1 |
Circuit arrangement and method for operating a high-pressure discharge lamp The present invention relates to a circuit arrangement for operating a high-pressure discharge lamp (La) with at least one first (S1) and one second electronic s...
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WO/2008/084349A1 |
A method and circuit arrangement for driving a gas discharge lamp by means of at least one half-bridge for commutating a supplied DC power to a bipolar lamp current is disclosed, wherein the half-bridge comprises two series-connected sem...
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WO/2008/084358A1 |
An inductively powered gas discharge lamp assembly having a secondary circuit with starter circuitry that provides pre-heating when power is supplied to the secondary circuit at a pre-heat frequency and that provides normal operation whe...
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WO/2008/083697A1 |
The invention relates to a fan control for an HID lamp, and to an HID lamp. In order to increase the dimming region of cooled HID lamps, the fan control according to the invention provides that the control of the fan output is performed ...
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WO/2008/081392A2 |
The present utility model relates to an electromagnetic interference suppressing apparatus for a high-frequency signal generation device. The high-frequency signal generation device includes an inverter means which is used for converting...
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WO/2008/082805A2 |
Disclosed is a lamp transformer assembly, transformer winding arrangement and method of assembling a transformer assembly and lamp igniter transformer core. The lamp transformer assembly comprises a transformer core comprising two or mor...
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WO/2008/082786A1 |
An electronic ballast circuit for a lamp is described, wherein the ballast comprises a power factor correction circuit coupled to an inverter circuit. The inverter circuit is further coupled to a trigger circuit, which is in turn operati...
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WO/2008/081633A1 |
A discharge lamp lighting device comprises a charging circuit provided in parallel with a smoothing capacitor (13) connected with the output terminal of a DC/DC converter (2) and arranged such that one end of a lighting assistant capacit...
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WO/2008/083392A2 |
An AC inverter circuit supplies power to multiple lamps in an LCD backlight. Conventional AC power is used as direct input into a full wave rectifier that converts the input from AC to a DC reference voltage. A transformer driver, includ...
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WO/2008/082819A1 |
Systems and methods are disclosed that facilitate sensing a pulse in a ballast circuit for a lamp when the lamp is in an end-of-life (EOL) stage or when the lamp is experiencing an arcing conduction condition, such as may occur when a co...
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WO/2008/079793A2 |
Various systems and methods for lighting are disclosed. For example, some embodiments of the invention (100) provide methods for retrofitting lights. The methods include providing a solid state light bulb. The solid state light bulb incl...
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WO/2008/078258A1 |
A method is described for driving a gas discharge lamp (11) with commutating lamp current, wherein the lamp current has an average commutation frequency (1/T0), the lamp current preferably having constant magnitude. In order to counterac...
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WO/2008/078734A1 |
In an electrodeless discharge lamp (1) to be turned on by a PWM dimmer control, the inside of a bulb (10) is filled with a discharge gas including krypton to reduce a re-firing voltage, so that vibration of a ferrite core (22) inserted i...
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WO/2008/079547A1 |
Disclosed are a lamp igniter module and method of assembling a lamp igniter module. The lamp igniter module comprises a transformer carrier, a slide-in electrical connector, a pc board, and a housing. Assembly of the lamp igniter module ...
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WO/2008/080016A2 |
Embodiments are disclosed for apparatus and methods for increasing the reliability of the flash discharge response in pulsed gas discharge lamps. One embodiment includes a system comprising two gas discharge lamps having cathodes and ano...
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WO/2008/078473A1 |
An alternating current power supply device is provided with switch elements (Q1, Q2) for converting direct current power from a direct current power supply (Vin) into alternating current power; a transformer (T1) for converting the volta...
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WO/2008/078484A1 |
Provided is a discharge lamp lighting device comprising a power converting circuit having a voltage dropping chopper circuit (1) and a polarity inverting circuit (2) for converting the output of the voltage dropping chopper circuit (1) i...
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WO2008036978A9 |
A lighting system, and method for using same, including a light source with one or more LEDs and a controller in communication with and adapted to control power flow to the light source. The LEDs may be overdriven by the controller in a ...
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WO/2008/074231A1 |
A voltage regulation and control circuit of illumination lamplight is applied to a single-phase illumination system composed of a main power supply and lighting loads which are in series. The single-phase illumination system includes: a ...
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WO/2008/074360A1 |
The present invention relates to a circuit arrangement for operating a high-pressure discharge lamp (12) having an electronic ballast device, which is configured to provide an AC feed signal for the high-pressure discharge lamp (12), and...
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WO/2008/075389A1 |
A circuit arrangement for use in driving electrical loads such as High Flux (HF) LEDs used as lighting sources includes:- a switched power source (10) providing a voltage signal switched with a switching frequency (Fsw) and having a give...
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WO/2008/074664A1 |
In the case of a lamp (1) according to the invention, a radio-frequency identification chip (2) which can be read without making contact is fitted to the lamp. The radio-frequency identification chip (2) advantageously makes it possible ...
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WO/2008/072158A2 |
In a method and circuit for operating a gas discharge lamp, the physical processes occurring in the gas discharge lamp are determined in order to control the behavior, and thus the light output, of the gas discharge lamp. Thereto, the me...
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WO/2008/072154A2 |
The invention provides a lighting device which is color-variable without a substantial deviation from the black body locus of the light generated by the lighting device. The lighting device is also dimmable without a substantial shift of...
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WO/2008/071232A1 |
During operation of high-pressure discharge lamps, flickering occurs and a drop in the lamp voltage occurs when electrode points are formed excessively. The invention contributes to prevention of these effects. According to the invention...
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WO/2008/071547A1 |
The invention relates to a starting apparatus for a discharge lamp (100) which a spiral line pulse generator (104) and a charging circuit for charging the spiral line pulse generator, with means (108) for rectification of the charging cu...
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WO/2008/072146A2 |
A lamp driver circuit for operating a gas discharge lamp (La) is proposed, which comprises a switched mode power supply circuit (SMPS) and a first and a second output terminal (OT1, 0T2) for supplying a lamp current to the gas discharge ...
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WO/2008/072136A2 |
A lamp driver (1) for driving a gas discharge lamp (2) comprises: - a lamp current-generating section (10) for generating a constant lamp current commutating at a commutation frequency, the lamp current-generating section (10) having out...
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WO/2008/071544A1 |
Dusk switching interface for an electronic ballast, with the interface providing an input for a 230 V signal and, when said signal is applied, producing an output signal so that an electronic ballast which is coupled to the output signal...
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WO/2008/072938A1 |
The present invention relates to a synchronous lighting apparatus of multiple xenon lamps using an AC power source, which includes an AC power line for supplying a power supplied from an AC power supply to a xenon lamp, a controller disp...
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WO/2008/068528A1 |
A device for replacing conventional wall mounted light switches in situ comprises a dimmer (1) and an occupancy sensor (4). These are arranged such that the electrical power of at least one output (2) can be varied manually and in respon...
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WO/2008/068667A2 |
A flashlight comprising a high-pressure mercury vapor discharge lamp (1) (UHP lamp) is described. The miniaturized UHP lamp (1) enables flashlights with improved range due to the small electrode distance at high intensity in comparison t...
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WO/2008/068673A2 |
A flashlight comprising a mercury vapour discharge lamp (12) as e.g. a HID Lamp (High Intensity Discharge Lamp) with adjustable light output is described. The extreme brightness and peak intensity of mercury vapour discharge lamps (12) i...
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WO/2008/065383A1 |
Drive circuitry for a fluorescent lamp comprising inverter circuitry having outputs for connection to respective terminals of a fluorescent lamp and an extra low voltage transformer connected to the inputs of the inverter circuitry. The ...
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