Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 401 - 450 out of 32,965

Document Document Title
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/2012/083328A1
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/2012/077125A1
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/2012/062556A1
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/2012/050752A1
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/2012/038233A1
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/2012/037973A2
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...  
WO/2012/031435A1
A stabilization circuit for electronic transformer driven LED devices. The circuit is provided at an output of an electronic transformer driving circuit, which has a rectifier fed into a feedback-controlled oscillator circuit. An isolati...  
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/2012/022384A1
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/2012/019857A2
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 ...  

Matches 401 - 450 out of 32,965