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Matches 351 - 400 out of 32,965

Document Document Title
WO/2013/021565A1
Provided is a high-voltage discharge lamp lighting device having a simple control structure that ensures the service life of a lamp while preventing flickering and blinking by setting an appropriate value as a peak value of a high-freque...  
WO/2013/018513A1
Provided is a lighting apparatus which is capable of suppressing illuminance maintenance ratio deterioration due to a positional shift of a protrusion, and is capable of increasing the service-life of a discharge lamp. The lighting appar...  
WO/2013/019377A1
An electronic circuit for use with a lamp controller includes a driver component and a voltage interface circuit powered by the driver component. The interface component delivers a low voltage power signal at a defined operating range vi...  
WO/2013/014564A1
The disclosed embodiments relate to a daylight harvesting system (1). The daylight harvesting system comprises a light distribution device comprising a light inlet (2) for receiving incident light (3), and a light outlet (4) for providin...  
WO/2013/010782A2
The invention relates to methods of controlling operation of a resonant power converter and to controllers configured to operate according to such methods. Embodiments disclosed include a method of controlling a power output of a resonan...  
WO/2013/012389A1
There is provided an electronic PL lamp capable of being mounted to a PL lamp holder. The lamp includes a case able to be mounted to the PL lamp holder at a first end; a case cover able to be affixed to a second end of the case; an elect...  
WO/2013/010459A1
Provided in the present invention is a self-oscillating inverter power supply of reliable operations and reduced costs and having variable output frequency or output power. The power supply is provided with an inverter switching circuit,...  
WO/2013/010461A1
Provided is a self-oscillating inverter power supply having continuously variable output frequency or output power. The power supply is provided with an inverter switching circuit (101), at least two magnetic current transformers (102 an...  
WO/2013/009234A1
The present invention relates to the field of flash tubes for photographic use, in particular to a flash tube comprising a trigger element for triggering a flash in the flash tube. Accordingly, a flash tube is provided. The flash tube co...  
WO/2013/007727A2
Electronic ballast for a lamp, such as a gas discharge lamp, preferably for a fluorescent lamp (LA), having an inverter, connected with a d.c. voltage source (Vbus), and a load circuit, which has the lamp (LA) and a series resonance circ...  
WO/2013/004810A1
Electronic ballast for a lamp, such as a gas discharge lamp, e.g. a fluorescent lamp (LAMP), the ballast having an inverter, connected with a d.c. voltage source (Vbus), and a load circuit, which has the lamp (LAMP) and a series resonanc...  
WO/2013/003446A1
A ballast that selectively operates multiple lamps is provided. The ballast includes a switching network, capable of operating in a number of switching configurations. The ballast also includes a control circuit, and two lamp control swi...  
WO/2012/178024A1
A power control system includes a power reduction module operable to reduce power to a connected load, a switching module operable to selectively transfer power directly to the load or to the power reduction module, a harmonic reduction ...  
WO/2012/172926A1
Provided is a ceramic metal halide lamp illumination device in which only a single easily lit light-emitting tube is lit from among a plurality of light-emitting tubes, the purpose being to shorten the restart time and achieve an instant...  
WO/2012/167292A1
In order to operate an electronic ballast (9) for a luminous means (10), an input voltage (Vin) of the electronic ballast (9) is detected and is compared with a reference value (V1-V3) representing a tolerable minimum input voltage of th...  
WO/2012/170137A1
A ballast to energize a lamp at a selected lighting level is provided. The ballast includes a rectifier, a buck converter, and a controller. The rectifier produces a DC voltage with a substantially constant magnitude. The buck converter ...  
WO/2012/164588A1
An high-efficiency electronic device for turning on and power supplying of lamps, is provided with a circuit comprising a diode bridge rectifier, or Graetz bridge, AC powered preferably by stabilizing inductor (LI), wherein at DC output ...  
WO/2012/163624A1
An illumination system comprising a connector comprising two contacts (122, 124; 322, 324) for connection to a lamp (1; 3), a lamp (1; 3), and a conventional ballast (2) arranged between a power supply network (L1, N) and the connector, ...  
WO/2012/161795A1
Light source power circuits and EMI filters therefor are presented in which a depletion mode field effect transistor is connected in series with an EMI filter capacitor following an input rectifier to allow filtering of EMI and to limit ...  
WO/2012/160010A1
The present invention relates to a circuit arrangement for operating at least one high-pressure discharge lamp (La) having a voltage transformer (10) having at least one electronic switch (T1; T2); an actuating circuit (12) for actuating...  
WO/2012/156205A1
The invention relates to a method for operating a high-pressure discharge lamp with a variable power, wherein the high-pressure discharge lamp has a nominal power, and is operated at an instantaneous power, wherein the instantaneous powe...  
WO/2012/154639A1
A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-DC converter circuit t...  
WO/2012/151712A1
A programmed start ballast (100) circuit is presented having a mode control circuit (150) to selectively switch an inverter (108) output load to control operation for cathode preheating, step dimming and/or anti-arcing operation.  
WO/2012/154671A1
A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit generates a lamp current through the lamp tube havi...  
WO/2012/145927A1
A power compensation method for a ceramic metal halide lamp ballast is provided. The method includes: S10 estimating whether a switch tube M2 of a lower bridge leg in a semi-bridge double BUCK circuit is conducted or not, if it is conduc...  
WO/2012/146877A1
The invention relates to a public lighting device (1) comprising a circuit powered with voltage from a distribution grid (2) and at least one lamp (4) connected to the circuit and having a pre-determined threshold cut-out voltage. The ci...  
WO/2012/146029A1
A preheating circuit applied to a fluorescent lamp electronic ballast comprises a diode (D) and a first capacitor (C1) which are connected in series and are then connected with a secondary winding (T) of a magnetic ring in parallel, a th...  
WO/2012/149561A2
A multi-strike ballast to ignite an electrodless lamp is disclosed, and includes an inverter circuit, an output voltage detection circuit (OVDC), and an inverter shutdown circuit. The inverter circuit, upon activation, sends an ignition ...  
WO/2012/145900A1
A ballast level control method and system for a ceramic metal halide lamp is provided. The system includes a control chip (500), a voltage-booster circuit (100), a half-bridge control circuit (300), a driving circuit (400) and a programm...  
WO/2012/145972A1
This invention pertains to the electronic technology filed, which provides a high intensity discharge (HID) ballast circuit, an electronic ballast and a high intensity discharge lamp. The HID ballast circuit comprises a trigger circuit, ...  
WO/2012/143841A2
A program-start ballast(100) that is connectable to a lamp (150) with a filament (151) is disclosed. The ballast includes a heating unit (170) arranged to heat the filament (151), a receiver (180) arranged to receive a signal to turn the...  
WO/2012/142677A1
Embodiments of the present invention reside in a safety activation system and method for a lighting installation. The safety activation system comprises an elongate housing for accommodating at least one illumination element. The elongat...  
WO/2012/140460A1
A discharge lamp includes a discharge tube (2) and two filaments (3,4), one at either end of the discharge tube (2) for generating a lamp arc between the filaments (3,4). Each filament (3,4) has a first end (5) connected to a power suppl...  
WO/2012/141849A1
A circuit configuration for powering high-frequency fluorescent lamps with rapid start capability has input terminals connected to a ballast and output terminals connected to a fluorescent lamp. A transformer module has at least one prim...  
WO/2012/131522A1
An end cap (104) for a tubular light source (102), the tubular light source (102) configured to be arranged in a lighting fixture (106) comprising at least one socket (108), wherein the end cap (104) comprises, a first housing portion (2...  
WO/2012/134702A1
A lighting system converter circuit of a lamp power converter to selectively operate a plurality of lamps connected thereto is provided. The lighting system converter circuit includes a first impedance circuit and a second impedance circ...  
WO/2012/134703A1
A switch status detection circuit includes three input terminals and a ground terminal. Two input terminals connect to a power supply via respective switches, receiving a respective voltage signal. The third connects to the power supply,...  
WO/2012/128426A1
A discharge path circuit, the circuit providing a discharge path for an input terminal of an IC (Integrated Circuit) formed with a power input port connected to a first input and an operation mode selection port connected to a second por...  
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/2012/109687A1
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/2012/109350A2
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...  

Matches 351 - 400 out of 32,965