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Matches 601 - 650 out of 42,218

Document Document Title
WO/2010/138079A1
An exemplary embodiment of the invention, a dimmer system and a dimming method employed thereby, is described. The dimmer system communicates AC power having alternating AC current half-cycles to a gas discharge lamp for energizing the g...  
WO/2010/136918A1
A luminaire conversion kit for a luminaire with a lamp, the luminaire defining an original space, the conversion kit including a dual capacitor (60) operably connected to the lamp, the dual capacitor (60) having first capacitor (62) and ...  
WO/2010/134397A1
Provided is a high-voltage discharge lamp lighting apparatus having a smaller size and a simple structure for lighting a high-voltage discharge lamp that uses a starting light source. The high-voltage discharge lamp lighting apparatus ha...  
WO/2010/133990A1
The invention relates to a power supply circuit for supplying power to a lamp, comprising: - an input side to connect the power supply circuit to a dimmer; - an output side to connect the power supply circuit to the lamp; - a capacitor c...  
WO/2010/130292A1
The invention relates to an LCD projector having a high-pressure discharge lamp, wherein the luminous intensity of the lamp is adapted to the average brightness of the image during projection, in order to thereby improve the contrast of ...  
WO/2010/131538A1
Provided is a high-pressure discharge lamp lighting device in which it is possible to control the number of inversions of the polarity of a lamp lighting current, i.e., the lighting frequency in an appropriate range even for a light sour...  
WO/2010/128484A3
An apparatus comprising: a processor configured to control a flash unit in an exposure time period of an image sensor array, to provide a first non-zero light intensity in a first portion of the exposure time period and to provide a seco...  
WO/2010/128301A3
An electrodeless, microwave lamp (1) has a magnetron (2) as a microwave source and an excitable material lucent crucible (5) in whose excitable material a plasma is established. For coupling microwaves from the magnetron into the crucibl...  
WO/2010/125843A1
A lighting device (3) provided with a cold-cathode fluorescent lamp (light source) (9), and a light-emitting face (10c) that emits light coming from the cold-cathode fluorescent lamp (9), is also provided with; an inverter circuit (drivi...  
WO/2010/126601A1
An AC-driven LED circuit includes a first circuit having a first branch and a second branch which connect at first and second common point The common points provide input and output for an AC driving current from a driver of the circuit ...  
WO/2010/125053A1
The invention relates to a power-controlled operating circuit (1, 21) for a lighting means (LP, LD) and a method for operating the same. For the power control, the actual power value (Pactual) must be measured and compared with a specifi...  
WO/2010/124314A1
The invention relates to an emergency light operating device (1) for a gas discharge lamp (5), wherein the emergency light operating device (1) comprises an isolated PFC as the input stage and a DC/AC converter (4) at the output.  
WO/2010/125487A1
A lamp driving circuit and method for driving a gas discharge lamp provided with supply electrodes, and an ignition electrode. A DC supply current is generated by a buck converter having a buck converter operating frequency. An inverter ...  
WO/2010/121968A1
The application relates to an RF amplifier for Electrodeless High Intensity Discharge Lamps (EHID). The RF amplifier comprises a plurality of amplifier stages (PA1-PAn) that are coupled between an input signal power divider (PD) and an o...  
WO/2010/120683A1
A fluorescent lamp light intensity dimming control generates a pulse width modulation (PWM) signal at about a fifty percent duty cycle and has very fine frequency change granularity to allow precise and smooth light dimming capabilities....  
WO/2010/118626A1
The present invention relates to an electronic ballast for a fluorescent lamp and an energy-saving lamp. A multi-function module MK circuit is added to the electronic ballast which is based on a half-bridge inverter circuit. The multi-fu...  
WO/2010/118406A2
Various apparatuses and methods for starting a thyristor are disclosed herein. For example, some embodiments provide an apparatus for starting a thyristor, the apparatus including a thyristor, a switch, a load connected to the thyristor ...  
WO/2010/115773A1
The invention relates to a circuit arrangement for operating a high-pressure discharge lamp (5) having a straightened arc, comprising: at least one first (Q1) and one second electronic switch (Q2) in a first half-bridge (6); a supply vol...  
WO/2010/118406A3
Various apparatuses and methods for starting a thyristor are disclosed herein. For example, some embodiments provide an apparatus for starting a thyristor, the apparatus including a thyristor, a switch, a load connected to the thyristor ...  
WO/2010/116272A1
An HID lamp ignitor for a lamp including a transformer (92) having a primary winding (94) inductively coupled to a secondary winding (96) operably connected to a lamp output (98); a first switch circuit (100) operably connected between D...  
WO/2010/115687A1
The present invention relates to a circuit assembly for operating at least two different types of discharge lamps, for the operation of which different lamp currents are required. The discharge lamp is connected in series to a coupling c...  
WO/2010/118399A2
Various embodiments of a dimmable power supply are disclosed herein. For example, some embodiments provide a dimmable power supply including an output driver, a variable pulse generator and a load current detector. The output driver has ...  
WO/2010/118399A3
Various embodiments of a dimmable power supply are disclosed herein. For example, some embodiments provide a dimmable power supply including an output driver, a variable pulse generator and a load current detector. The output driver has ...  
WO/2010/111721A1
An operating device for a lamp, comprising at least one circuit board, at least one base plate which has good thermal conductivity and comprises retaining elements, wherein the circuit board has openings in which the retaining elements a...  
WO/2010/112112A1
The invention relates to a dimmable amalgam lamp having a quartz glass tube enclosing a discharge chamber comprising a filling gas, and closed by pinching at both ends thereof, through which at least one current feedthrough is fed throug...  
WO2010110170A1
The necessary restriking voltage will be enabled to be maintained, even when the inductance value of the starting circuit is small, and the time it will take for the lamp current to reach zero from the pre-reversal polarity is close to t...  
WO/2010/110946A1
A circuit for protecting an electronic ballast for use with a remote controller for gas discharge lamps against miswiring to a power source. Depletion mode MOSFETS are employed in both sides of the circuit to the controller and the MOSFE...  
WO/2010/108580A1
The invention relates to a bus device with an electronic circuit (1), which is connected, via feed lines, to a low-voltage interface (2), which has at least one first and one second connection terminal (DA+, DA-) for connecting a bus lin...  
WO/2010/110951A1
An interface circuit for a lamp ballast includes first and second input power lines, L 1 and. L2, with first and second respective switches, and a neutral power line N, all coupled to a diode bridge. Closing one of the first or second in...  
WO/2010/106128A1
The invention relates to a method and to a circuit arrangement for dimming an illuminant (1) according to digital dimming values (Dd) by regulation. In order to ensure that slow dimming is possible at high resolution, but the regulation ...  
WO/2010/102894A1
The Invention provides a casing for electronic ballast, which casing is made of plastic material. The casing comprises: a top wall; a bottom wall opposite to the top wall; two opposite side walls extending integrally between the top wall...  
WO/2010/102431A1
An energy-saving fluorescent lamp apparatus comprises: an oscillating capacitor, which is set at a power source input and is connected in parallel with a cathode input of a fluorescent lamp; the fluorescent lamp, whose cathode input is c...  
WO/2010/104297A2
The present invention relates to an active constant power supply apparatus, and more particularly, to an active constant power supply apparatus which can rectify power with a variety of intensities and frequencies without using a high ca...  
WO/2010/102698A1
The invention relates to a known radiation source having a lamp body 2 and an assembly 11 for mounting the same, comprising a socket 5 fixed on the lamp body, a receptacle 6 for receiving the socket, and a detecting device for detecting ...  
WO/2010/104297A3
The present invention relates to an active constant power supply apparatus, and more particularly, to an active constant power supply apparatus which can rectify power with a variety of intensities and frequencies without using a high ca...  
WO/2010/104297A9
The present invention relates to an active constant power supply apparatus, and more particularly, to an active constant power supply apparatus which can rectify power with a variety of intensities and frequencies without using a high ca...  
WO/2010/101556A1
Methods and apparatus for powering a dimmable ballast operating a gas-discharge bulb in a cold cathode mode of operation, that is, without requiring heating of filaments. The ballast circuit includes a rectifier, bypass capacitor, driver...  
WO/2010/100935A1
Provided is a mercury-free vehicle discharge lamp that is stably lighted with a power of 18 to 30 W in a steady time. The lamp is defined in a light-emitting portion (11). A discharge medium including a metal halogen compound and a rare ...  
WO/2010/101900A8
A multi-stage power supply for a load control device is able to operate in a low-power mode in which the power supply has a decreased power consumption when an electrical load controlled by the load control device is off. The load contro...  
WO/2010/101900A1
A multi-stage power supply for a load control device is able to operate in a low-power mode in which the power supply has a decreased power consumption when an electrical load controlled by the load control device is off. The load contro...  
WO/2010/097271A1
The invention relates to a method for starting a gas discharge lamp having a resonance circuit, characterized by the following steps: a) exciting the resonance circuit in such a way that for a first time span a starting voltage is genera...  
WO/2010/097995A1
The disclosed illumination device is provided with multiple discharge tubes (17) that are disposed in parallel, and a power source (170) for supplying driving power for parallel driving of said multiple discharge tubes (17). The driving ...  
WO/2010/096956A1
A fluorescent lamp capable of being used when filaments break or short-circuit. Said lamp includes a lamp tube (1) and a ballast (2) that are electrically connected. Resistors R1 and R2 are respectively connected in parallel to two group...  
WO/2010/062449A3
Systems and methods are disclosed that facilitate switching a lamp ballast between DALI and analog control states as a function of control state information stored prior to the ballast being powered of and control information received by...  
WO/2010/094543A1
The invention relates to an electronic operating device for a gas discharge lamp having: a DC/DC voltage converter, a power factor correction circuit, an inverter, a lamp inductor, and having a full bridge with two half bridges which can...  
WO/2010/096226A1
A dimmable ballast and methods are presented in which the operating frequency of a self-oscillating inverter is controlled according to a sensed lamp current for dimming control or cathode heating, and an AC bus voltage of the inverter i...  
WO/2010/091869A8
A housing for an ignition transformer for a gas discharge lamp comprises a cavity designed for accommodating the ignition transformer. The cavity has an opening for inserting the ignition transformer into the housing. The housing additio...  
WO/2010/092718A1
A lighting device for a display device comprises a plurality of discharge tubes (17) which are arranged side by side, support members (151) which support ends of the plurality of discharge tubes (17), a plurality of connection terminals ...  
WO/2010/092525A1
An electro magnetic ballast (110) for a gas discharge lamp (2) comprises: input terminals (3), for receiving a mains voltage; lamp connector terminals (4), for receiving a lamp; a controllable semiconductor switch (26) coupled in paralle...  
WO/2010/091869A1
A housing for an ignition transformer for a gas discharge lamp comprises a cavity designed for accommodating the ignition transformer. The cavity has an opening for inserting the ignition transformer into the housing. The housing additio...  

Matches 601 - 650 out of 42,218