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Matches 351 - 400 out of 42,218

Document Document Title
WO/2012/120435A3
The invention describes a method of driving a gas-discharge lamp (1) according to conditions in a specific region (R) of the lamp (1), which gas-discharge lamp (1) comprises a burner (2) in which a first electrode (4) and a second electr...  
WO/2012/120435A2
The invention describes a method of driving a gas-discharge lamp (1) according to conditions in a specific region (R) of the lamp (1), which gas-discharge lamp (1) comprises a burner (2) in which a first electrode (4) and a second electr...  
WO/2012/119473A1
A power frequency modulation high frequency HID electronic ballast mainly comprises a power filter circuit, a rectification filter circuit, a high frequency switching circuit and an HID lamp load. One end of the power filter circuit is c...  
WO/2012/116389A1
What is proposed is: an operating device (1) for operating a light-emitting means (2) in a normal operating mode, having a control unit (3) for controlling the operating device (1), a supply input (4) for supplying an AC input voltage (V...  
WO/2012/118653A3
Semiconductor light emitting devices include a first string of at least one blue-shifted-yellow LED, a second string of at least one blue-shifted-green LED, and a third string of at least one LED that emits light in the red color range. ...  
WO/2012/110961A3
An emergency lighting ballast device includes a housing; a circuit disposed within the housing and configured to receive a battery supply voltage and to process the battery supply voltage for driving one or more fluorescent lamps; and at...  
WO/2012/109687A1
The invention relates to a method for detecting a rectifier effect for a dimmable gas discharge lamp (L), wherein the rectifier effect is detected by comparing a measurement signal (M) fed back from the load circuit (L, C1, C2, R2, R3, R...  
WO/2012/110949A1
A circuit arrangement for operating and dimming a high pressure discharge lamp is equipped with a control circuit for dimming the high pressure discharge lamp fast to a first power level and much slower from the first power level to a se...  
WO/2012/110961A2
An emergency lighting ballast device includes a housing; a circuit disposed within the housing and configured to receive a battery supply voltage and to process the battery supply voltage for driving one or more fluorescent lamps; and at...  
WO/2012/109350A3
The present disclosure relates to apparatuses and methods to control an electrodeless plasma light source. In various embodiments, an apparatus is provided that includes an electrodeless plasma lamp with a lamp driver circuit. The lamp d...  
WO/2012/109350A2
The present disclosure relates to apparatuses and methods to control an electrodeless plasma light source. In various embodiments, an apparatus is provided that includes an electrodeless plasma lamp with a lamp driver circuit. The lamp d...  
WO/2012/106467A2
A UV curing lamp (18) has variable resistive ballast (Fig. 6A) provided by at least one resistance alloy wire. The variable resistance ballast defines the lamp's maximum operating power consistent with the power supply. The wire in combi...  
WO/2012/096565A1
Solar simulator comprising at least at least one high-intensity discharge (HID) lamp type,and at least one halogen lamp type, which lamps are applied simultaneously and are provided with infrared filter means to provide a mixture of ligh...  
WO/2012/095889A1
When output current is cut off by a disconnection, a control unit (7) immediately temporarily interrupts a DC/DC converter (3) to suppress excess current when recovering. Thereafter, the control unit (7) repeats the temporary interruptio...  
WO/2012/090112A1
A half bridge circuit is operated in the commutating forward mode. A control loop monitors the voltage of a terminal between the two half bridge capacitors and adjusts the current level in each half period so that the voltage at the term...  
WO/2012/089468A1
The present invention relates to a field emission lighting arrangement, comprising an anode structure at least partly covered by a phosphor layer, an evacuated envelope inside of which an anode structure is arranged, and a field emission...  
WO/2012/083327A3
The invention relates to a ballast for at least one gas-discharge lamp, having a load circuit, to which the gas-discharge lamp is to be connected, a preferably switched-mode heating circuit controlled by means of a switch for at least on...  
WO/2012/083324A1
The invention relates to a method for igniting at least one gas discharge lamp by means of an inverter, which supplies a load circuit comprising the gas discharge lamp with AC voltage, wherein the load circuit has a resonant circuit, whe...  
WO/2012/087288A2
Described herein are compositions comprising combinations of metal salts, and methods of preparing and using the same.  
WO/2012/083323A3
The invention relates to a method and a device for operating a gas discharge lamp 1. The gas discharge lamp 1 is operated with an alternating voltage, and a DC component of the current flowing through the gas discharge lamp 1 can be adju...  
WO/2012/083328A1
The present invention makes it possible for operating parameters of a gas discharge lamp (1) to be measured more precisely by a control unit (4) of an operating device according to the invention, because interfering influences can be sup...  
WO/2012/081106A1
The purpose of the present invention is to reduce power consumption of a lamp which continues to be in a lighted state after an operation of turning off a power supply is performed. A display device of the present invention includes: a l...  
WO/2012/081350A1
The purpose of the present invention is to provide a dimming device capable of preventing a malfunction due to mixing of noise into alternating-current power supply voltage and waveform distortion. This dimming device is provided with a ...  
WO/2012/081320A1
Provided is a discharge lamp lighting device, whereby it becomes possible to prevent or suppress the occurrence of flickering during the lighting of a discharge lamp by a second lighting mode in which a lower alternate current electric p...  
WO/2012/083222A3
An electronic system includes a controller to provide at least dual-mode conduction control of a switching power converter. In at least one embodiment, the controller is capable to control transitions between discontinuous conduction mod...  
WO/2012/077125A1
The present invention provides a system for monitoring and controlling high intensity discharge (HID) lamps. The system includes a digital electronic ballast integrated with PLCC modem and PLCC concentrator. The digital electronic ballas...  
WO/2012/076643A1
The invention relates to a control cap (1) which allows an individual control of discharge luminaires (3) in an existing lighting system (4), without requiring complex modifications to the lighting system (4). The control cap (1) for dis...  
WO/2012/063178A1
A method for driving and dimming an HID lamp (2), the method comprising the steps of: providing a controllable HBCF current source stage (20); using the HBCF current source stage (20) to generate commutating DC lamp current (I) having al...  
WO/2012/062690A3
The invention relates to a method for operating a high-pressure discharge lamp (1) in a vehicle headlamp, wherein the electrical power of the high-pressure discharge lamp (1) during operation thereof is regulated at a constant level afte...  
WO/2012/062556A1
The invention relates to a method for operation of a high-pressure discharge lamp below its nominal power, wherein the high-pressure discharge lamp is operated at the nominal power level with an alternating current at a predetermined ope...  
WO/2012/062346A1
The invention relates to a circuit arrangement for rapid commutation during square wave operation of high-pressure discharge lamps, comprising: a half bridge arrangement having a half bridge and a lamp inductor, a first switch for coupli...  
WO/2012/056340A1
A method ofoperating a flashlamp (2) in a skin treatment system (1) comprises the steps of establishing a conductive path between the flashlamp (2) and a charged capacitor (4) causing a free discharge within the flashlamp, and interrupti...  
WO/2012/057928A1
A ballast or drive circuit (120) is located between a dimmer switch (130) and at least one light source or lamp (140). The ballast includes an electromagnetic interference (EMI) filter (150) operatively disposed between the dimmer switch...  
WO/2012/049152A3
The invention relates to a method for operating a light source (11) of a motor vehicle headlight (1) with direct current, the light source being actually designed for being operating with alternating current. The light source (11) compri...  
WO/2012/050752A1
A ballast circuit (6) comprises a rectifier circuit (8) and dual starting circuits (11, 13) that ensure ballast startup and lamp ignition regardless of input waveform half cycle. The first starting circuit comprises resonant circuit (10)...  
WO/2012/049196A1
The invention relates to an operating device (1) for at least one luminous element (2), comprising a means for measuring a temperature (T) present in the operating device (1) or in the surroundings of the operating device, at least one i...  
WO/2012/048495A1
A driving circuit for a backlight module of display device and a driving method thereof are provided. The driving method comprises following steps: a phase detector (153) detects the voltage phase of an inductance and a capacitance in a ...  
WO/2012/047397A1
A ballast and method are presented for detecting end-of-life conditions of fluorescent lamps in which a ballast output is controlled according to a dimming input when a DC voltage or current of the lamp is in a predefined range or when t...  
WO/2012/045555A1
The invention describes an operating device (1) for at least one lighting means (6), having a control circuit (5) which adjusts or controls at least one parameter which influences temperature development in the operating device (1), and ...  
WO/2012/044932A1
An electrodeless plasma lamp is provided. The lamp includes a conductive enclosure including a dielectric material (e.g., air) and a bulb containing a fill to form a light emitting plasma. A radio frequency (RF) power source is coupled i...  
WO/2012/042412A2
An apparatus (1100, 2000, 3000) executes an algorithm (2000) to determine a type of lamp (10) that is installed in a lighting unit (1000). The apparatus supplies power to the installed lamp (10) according to a first power control setting...  
WO/2012/042412A3
An apparatus (1100, 2000, 3000) executes an algorithm (2000) to determine a type of lamp (10) that is installed in a lighting unit (1000). The apparatus supplies power to the installed lamp (10) according to a first power control setting...  
WO/2012/041692A3
The present invention relates to an open-loop and/or closed-loop control device (109) for a gas discharge lamp (106) of a motor vehicle headlamp, wherein the open-loop and/or closed-loop control device (109) has a housing and control ele...  
WO/2012/038233A1
The present invention provides a circuit and a method for preheating filaments and a ballast. The circuit for preheating filaments includes: a transistor; a first winding, one terminal of which being electrically connected with a collect...  
WO/2012/038232A1
The present application provides a ballast and an illumination system including the same. The ballast includes at least two start control units, each configured to be connected with a corresponding lamp and output a start signal accordin...  
WO/2012/037973A3
The invention relates to a method for starting a high-pressure discharge lamp by means of a starter having a starting capacitor, a starting switch and a starting transformer, said method comprising the following temporally successive ste...  
WO/2012/037973A2
The invention relates to a method for starting a high-pressure discharge lamp by means of a starter having a starting capacitor, a starting switch and a starting transformer, said method comprising the following temporally successive ste...  
WO/2012/034931A1
The invention relates to a method for operating a gas discharge lamp (10) of a motor vehicle headlamp, wherein the gas discharge lamp (10) is operated in a first operating mode at a comparatively higher power and alternating voltage and ...  
WO/2012/031935A1
The invention relates to a circuit arrangement and to a method for starting and operating a high-pressure discharge lamp, having a half-bridge arrangement with a half-bridge centre point, said half-bridge arrangement being connected to a...  
WO/2012/032647A1
During low-power operation of an electronic device, which has a discharge lamp and a lamp power supply unit that provides electric power to the discharge lamp, by a control unit lighting the lamp at a lower electric power than the rating...  

Matches 351 - 400 out of 42,218