Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 401 - 450 out of 42,192

Document Document Title
WO/2012/029172A1
This projection display device (100) is a projection display device for projecting image light on the basis of an image signal, and comprises a lamp (13), a display element (15) which modulates light emitted from the lamp according to th...  
WO/2012/025626A1
The invention relates to luminaires, especially luminaires to be operated in lamp holders for fluorescent lamps. In order to prevent individuals from experiencing electric shocks when inserting a luminaire, for example in the lamp holder...  
WO/2012/022555A1
The invention proposes a circuit comprising at least one Y-capacitor, comprising at least one damping element which is arranged parallel to the Y-capacitor. A network filter, an operating device and a lighting apparatus or lamp having a ...  
WO/2012/024383A3
An electronic ballast having an inverter circuit for driving a gas discharge lamp prevents allows some hard switching to occur in the inverter circuit in order to ensure adequate ballasting impedance to provide stable operation of the la...  
WO/2012/022384A1
The invention relates to a self-ballasted electrodeless lamp comprising a bulb accommodating an induction coil, a ballast circuit for applying a high-frequency signal to the induction coil and a lamp socket is disclosed. The lamp socket ...  
WO/2012/024383A2
An electronic ballast having an inverter circuit for driving a gas discharge lamp prevents allows some hard switching to occur in the inverter circuit in order to ensure adequate ballasting impedance to provide stable operation of the la...  
WO/2012/024295A1
An electronic ballast for driving a gas discharge lamp comprises an inverter circuit, a resonant tank circuit, and a control circuit operable to determine an approximation of a resonant frequency of the resonant tank circuit and to contr...  
WO/2012/023694A1
Disclosed is a lighting device including a one-touch dimmer switch. In particular, the present invention discloses a technology where a manager which controls the dimming rate and a user using the dimmer switch regulate the operating ran...  
WO/2012/019935A1
The invention relates to a method for operating a high-pressure discharge lamp outside the nominal power range thereof, wherein at a lamp power less than 85% of the nominal power or at a lamp power greater than 110% of the nominal power ...  
WO/2012/020047A1
An operating appliance for lighting means, in particular of an electronic ballast for gas discharge lamps, has a power factor correction circuit (PFC) for reducing harmonics when the input current is being drawn. In this case, current is...  
WO/2012/019857A3
The invention relates to a method for extending the life of a high-pressure discharge lamp, having a gas discharge lamp burner made of quartz glass which is operated at an electrical power P(t) which varies over time, wherein the electri...  
WO/2012/019857A2
The invention relates to a method for extending the life of a high-pressure discharge lamp, having a gas discharge lamp burner made of quartz glass which is operated at an electrical power P(t) which varies over time, wherein the electri...  
WO/2012/016895A1
Proposed is a luminous device (209), comprising at least two lamps (206, 207, 208), wherein each lamp (206, 207, 208) has a drive unit (203, 204, 205), wherein at least two dimming states of a lamp (206, 207, 208) are settable using at l...  
WO/2012/011863A1
A flash apparatus comprising at least two flash tubes and at least two energy storage units is presented, wherein each of said at least two energy storage units is being arranged to be configured to strictly correspond to one of the at l...  
WO/2012/012499A1
Optical reader systems (10) and methods for determining the presence and/or amount of analytes in a fluid sample are described. The optical reader (10) for performing a diagnostic test on a test sample comprises a cassette receiving memb...  
WO/2012/011288A1
Disclosed is a lighting circuit which is for a lamp that uses an LED as a light source, and which facilitates design of a resonance circuit. A lighting circuit (11) of a lamp, which uses as a light source a light-emission section (39) co...  
WO/2012/007714A1
To the common point C of two transistors of a magnetron, switched converter power circuit is connected a coupling capacitor C11 which provides input to a starter circuit (24). A transistor switch (25) is in series with the capacitor C11 ...  
WO/2012/007779A1
An electronic ballast for arc lighting sources for balanced power driving, arc lighting source, and power control system, making possible longer working life by regulating the functioning of arc lighting sources, as well as more economic...  
WO/2012/009353A1
Embodiments of the invention provide an apparatus, method, and program product to control a lamp system. The apparatus comprises a plasma lamp bulb (20) and a microwave generator (12) operable to generate a microwave energy field to exci...  
WO/2012/007498A1
The present invention relates to a starting circuit for a high-pressure gas discharge lamp LA. Said starting circuit has a half-bridge, which is formed by two clocked switches S3 and S4 and generates an AC voltage from a DC voltage UG. T...  
WO/2012/007953A1
An electronic ballast is disclosed, which is used for self ballasted lamps and other gas discharged lamps with or without filaments. Size of all the components of the circuit can be verified; the circuit functions at variable voltages an...  
WO/2012/004697A1
The invention relates to a lamp driver for operating an HID-lamp, comprising: input terminals for connection to the poles of a low frequency supply voltage, rectifying means coupled to the input terminals for rectifying the low frequency...  
WO/2012/004695A1
The invention relates to a lamp driver for supplying an HID lamp equipped with input terminals for connection to a supply source, a circuit part I coupled to the input terminals for igniting the lamp and for generating a lamp current out...  
WO/2012/003541A1
The Digital Addressable Lighting Interface (DALI) is a lighting control protocol that allows individual control and monitoring of each device in a lighting system (e.g. ballasts, emergency lighting etc), as well as groups of such devices...  
WO/2012/004303A1
The invention relates to a method for defining an operational parameter of an operational device for lighting means. Said method consists of the following steps: the voltage supply of the operational device is preferably switched on/off ...  
WO/2011/153831A1
A control system for lamp source comprises a lamp (510), a ballast (500) connected with the lamp (510) and a lamp controller (601). The ballast (500) comprises a rectification boost power factor correction (PFC) controller and a buck DC ...  
WO/2011/154180A2
The invention specifies a light-emitting diode arrangement, with a piezoelectric transformer (1) which has at least one output-side connection point (11), and with a high-voltage light-emitting diode (2), which comprises a high-voltage l...  
WO/2011/156083A1
An electronic high intensity discharge (HID) ballast (102) is presented which includes a dual mode buck converter (120) providing a DC output voltage (122) to drive an inverter (140), where the buck converter (120) regulates the DC outpu...  
WO/2011/153020A1
Embodiments of the present invention provide for the rapid reignition of a high intensity discharge lamp. In one embodiment of the invention, an apparatus for a fast reignition of a high intensity discharge lamp is disclosed. The apparat...  
WO/2011/151107A1
The invention relates to a circuit arrangement for operating a discharge lamp (FL). The coils (Wh, Wc) of the lamp are heated using a conductor (TR1). In order to identify the lamp, one coil of the conductor is bridged by a resistor (R5).  
WO/2011/149838A3
A system may include a switch arranged to control a lighting load, a processor arranged to control the switch, and a failsafe circuit arranged to monitor the processor and actuate the switch if the processor fails. The failsafe circuit m...  
WO/2011/148954A1
Disclosed is an LED illuminating device having an illuminating load using an LED. The LED illuminating device includes a rectangular bridge circuit (40) wherein a first switching transistor (41), a second switching transistor (42), a thi...  
WO/2011/149863A3
A dimmer conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit receives a gate drive signal from a PFC circuit and provides a dimmer reference level signal representative of a dimme...  
WO/2011/149866A2
A conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit includes a comparator having a first input and a second input, and configured to provide a pulse-width modulated output in re...  
WO/2011/147645A1
The invention relates to a method for operating discharge lamps of different lamp types on an operating device. The value of a first parameter that is correlated to the coil resistance of the discharge lamp is determined prior to lightin...  
WO/2011/149838A2
A system may include a switch arranged to control a lighting load, a processor arranged to control the switch, and a failsafe circuit arranged to monitor the processor and actuate the switch if the processor fails. The failsafe circuit m...  
WO/2011/147464A1
The invention relates to a method for compensating the burn-back of electrode tips in high-pressure discharge lamps, wherein during a predetermined duration the power supplied to the high-pressure discharge lamp is modulated between a lo...  
WO/2011/149866A3
A conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit includes a comparator having a first input and a second input, and configured to provide a pulse-width modulated output in re...  
WO/2011/149863A2
A dimmer conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit receives a gate drive signal from a PFC circuit and provides a dimmer reference level signal representative of a dimme...  
WO/2011/146427A3
A driver device for driving an LED lighting device includes at least one power switch adapted to operate at a switching frequency of greater than 500 KHz and adapted to control the driving current provided to the LED lighting device. Ope...  
WO/2011/144375A1
The present invention relates to a control apparatus (10) for at least one circuit arrangement (SA1) for operating fluorescent lamps and LEDs. Switching can take place between operation of the fluorescent lamps and the LEDs via a control...  
WO/2011/144403A1
The invention proposes a circuit arrangement for igniting a high-pressure discharge lamp, in which a high-voltage capacitor (C2) charged up to the ignition voltage of the lamp (XBO) is switched to the electrodes of the lamp (XBO) via a s...  
WO/2011/143957A1
The present invention discloses a dimming drive method, device and dimmable light. The dimming drive method comprises that: after a light source drive circuit which supplies power to a light source and micro control unit (MCU) is switche...  
WO/2011/141363A1
The invention relates to a method for operating a discharge lamp, in which the discharge lamp is operated using a commutation pulse current, wherein the amplitude of the commutation pulse current is controlled. Moreover, the invention re...  
WO/2011/141282A1
The invention relates to a method for operating a high-pressure discharge lamp, having the following steps: a) a voltage having a first frequency is applied to the high-pressure discharge lamp during a first time slice, and said voltage ...  
WO/2011/140686A1
An emergency electronic ballast comprising a ballast circuit and an emergency device circuit is disclosed in the invention. The ballast circuit includes a rectifier bridge circuit, a power factor correction (PFC) circuit, a filtering cap...  
WO/2011/141768A1
A method for using an electronic ballast circuit configured to operate a high intensity discharge (HID) lamp. Multiple light emitting diodes (LEDs) are attached to the current output of the electronic ballast circuit, and current is driv...  
WO/2011/139624A1
A diode selection circuit for a light emitting apparatus according to some embodiments includes a plurality of light emitting devices coupled in series. The diode selection circuit includes a comparator configured to receive a rectified ...  
WO/2011/138141A3
The invention relates to a lamp (1, 11, 20, 30, 40, 50, 60, 70, 80, 90, 110, 130, 140, 150, 160, 170, 190, 210), comprising a lamp unit (27, 56, 75, 87, 96, 116, 136, 145, 159, 165, 179, 195, 221), at least two separate contact sections ...  
WO/2011/138846A1
Provided is a high-pressure discharge lamp turn-on apparatus, wherein, until a prescribed time elapses since starting a turn-on, a constant-current having a value of Ib is supplied to the high-intensity discharge lamp (4) for a period of...  

Matches 401 - 450 out of 42,192