| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 05/06/2004 | EP1415515A1 Power supply and/or ballast system controlled by desired load power spectrum |
| 05/06/2004 | EP1415514A1 Reducing color segregation in hid lamps |
| 05/06/2004 | EP1415513A1 Circuit arrangement |
| 05/06/2004 | EP1415512A1 Lamp operating circuit for a gas discharge lamp |
| 05/06/2004 | EP1415511A1 Ballast with voltage and current sensors |
| 05/06/2004 | DE20303594U1 Pre-heating circuit for a discharge bulb, especially a low energy discharge bulb, comprises a direct current voltage source for the preheater circuit |
| 05/06/2004 | DE20303593U1 Switching transformer, especially for use as electronic ballast for a direct current discharge bulb, has a control unit with two field effect transistors |
| 05/06/2004 | DE202004003815U1 Electronic choke for cold cathode lamps has a free-running half bridge inverter with a center tap linked to a primary winding for a high-voltage transformer |
| 05/06/2004 | DE19834035B4 Kompakt-Niederspannungs-Energiesparlampe Compact and low voltage energy saving lamp |
| 05/05/2004 | CN1494731A Device for operating fluorescent tube |
| 05/05/2004 | CN1494362A Voltage supply circuit of multi fluorescent lamp tubes |
| 05/05/2004 | CN1149006C Multi-load power supply system and multi-tube drive system |
| 05/05/2004 | CN1149005C Fluorescent lamp lighting apparatus |
| 05/05/2004 | CN1149004C Ignitor for discharging lamp |
| 05/05/2004 | CN1148623C Circuit and method for controlling backlight of liquid crystal display in portable computer |
| 05/04/2004 | US6731080 Multiple ballast and lamp control system for selectively varying operation of ballasts to distribute burn times among lamps |
| 05/04/2004 | US6731078 Ballast for operating electric lamps |
| 05/04/2004 | US6731076 Base of an electric discharge lamp with an ignition device |
| 05/04/2004 | US6731075 Method and apparatus for lighting a discharge lamp |
| 05/04/2004 | US6731074 Electrode-less lamp equipment |
| 05/04/2004 | US6731073 Safety starter for fluorescent lamps |
| 05/04/2004 | US6731071 Inductively powered lamp assembly |
| 04/29/2004 | WO2004036959A1 Method and device for establishing a connection between a lamp and an electronic apparatus that is disposed upstream therefrom |
| 04/29/2004 | WO2004036922A1 Image projector with intensity-controlled light source |
| 04/29/2004 | WO2004015734B1 Thermal protector mounting bracket and improved thermally-protected ballast |
| 04/29/2004 | US20040080969 Drive for a half-bridge inverter |
| 04/29/2004 | US20040080943 Discharge lamp lighting device |
| 04/29/2004 | US20040080878 Protection device for transformers particularly for supplying power to lamps |
| 04/29/2004 | US20040080715 Light-source lamp unit, light-source device and projection-type display apparatus |
| 04/29/2004 | US20040080284 Intensity modulator for light source such as AC lamp |
| 04/29/2004 | US20040080283 Circuit arrangement for operating discharge lamps |
| 04/29/2004 | US20040080282 Flash strobe power supply system and method |
| 04/29/2004 | DE202004002516U1 Ignition and operating circuit for low pressure gas discharge lamp, has starter providing short-circuit between lamp electrodes during pre-heating phase with current limiting device in short-circuit path |
| 04/29/2004 | DE10248376A1 Projektionssystem Projection system |
| 04/28/2004 | EP1413177A1 Overvoltage protection for hid lamp ballast |
| 04/28/2004 | EP1364446A4 Self-oscillating circuit for driving high-side and low-side switching devices with variable width pulses |
| 04/28/2004 | EP1142453B1 Kit for converting lighting units employing fluorescent lamps from inductive operation to electronic operation |
| 04/28/2004 | CN1493175A High pressure electric discharge lamp starter and headlight device for automobile |
| 04/28/2004 | CN1493174A 放电灯装置 Discharge lamp device |
| 04/28/2004 | CN1492727A High voltage discharge lamp turn-on device and lighting device |
| 04/28/2004 | CN1492726A Voltage supply circuit of multiple lamp tubes |
| 04/28/2004 | CN1492725A Portable fluorescent lamp circuit |
| 04/27/2004 | US6728088 Protection circuit against high currents in lighting converters |
| 04/27/2004 | US6727665 Dimmer for energy saving lamp |
| 04/27/2004 | US6727664 Portable fluorescent drop-light |
| 04/27/2004 | US6727663 Circuit arrangement for feeding a load |
| 04/27/2004 | US6727662 Dimming control system for electronic ballasts |
| 04/27/2004 | US6727661 Self-ballasted fluorescent lamp |
| 04/27/2004 | CA2346782C Apparatus for dimming a fluorescent lamp with a magnetic ballast |
| 04/27/2004 | CA2196360C Electrodeless high intensity discharge lamp having a phosphorus fill |
| 04/25/2004 | CA2446678A1 Flash strobe power supply system and method |
| 04/22/2004 | WO2004034741A2 Electronic ballast with dc output flyback converter |
| 04/22/2004 | WO2004034740A2 Electronic ballast with filament detection |
| 04/22/2004 | WO2004034420A1 Ceramic metal halide lamp |
| 04/22/2004 | WO2004033960A2 Compact fluorescent lamp package |
| 04/22/2004 | WO2004010735A3 Lighting control system with variable arc control including start-up circuit for providing a bias voltage supply |
| 04/22/2004 | WO2003101151A3 Electronic ballast for a discharge lamp |
| 04/22/2004 | WO2003067929B1 Extraction of accessory power from a signal supplied to a luminaire from a phase angle dimmer |
| 04/22/2004 | WO2002080628A9 Lighting device |
| 04/22/2004 | US20040075402 Projector and power supply device |
| 04/22/2004 | US20040075392 Device for operating a high pressure discharge lamp |
| 04/21/2004 | EP1411754A1 Electronic ballast circuit |
| 04/21/2004 | EP1411622A2 Inverter circuits |
| 04/21/2004 | EP1410695A1 Pulse-width modulation for operating high pressure lamps |
| 04/21/2004 | EP1410694A1 A load conditioner |
| 04/21/2004 | EP1410421A1 Method and device for operating a uv-radiation source |
| 04/21/2004 | EP1151643B1 An electronically controlled, power saving, power supply system for fluorescent tubes |
| 04/21/2004 | CN1491071A Series cold-cathode starting gas discharging light illuminating system with adjustable light |
| 04/21/2004 | CN1491070A HID electronic ballast system supplied with A.C. bus with higher than 50Hz |
| 04/21/2004 | CN1490785A Light-source driver of driving dispaly device |
| 04/21/2004 | CN1147209C Inverter |
| 04/20/2004 | US6724989 Camera strobe recharging integrated circuit |
| 04/20/2004 | US6724987 Lens-fitted photo film unit with electronic flash device |
| 04/20/2004 | US6724602 Panic protection from fault conditions in power converters |
| 04/20/2004 | US6724157 Energy savings device and method for a resistive and/or an inductive load |
| 04/20/2004 | US6724155 Lamp ignition circuit for lamp driven voltage transformation and ballasting system |
| 04/20/2004 | US6724154 Cold cathode lamp and lamp control circuit |
| 04/20/2004 | US6724152 Lighting control system with variable arc control including start-up circuit for providing a bias voltage supply |
| 04/20/2004 | US6724126 Multi-load piezoelectric transformation circuit driver module |
| 04/20/2004 | US6723260 Method for marking a plastic eyeglass lens using a mold assembly holder |
| 04/15/2004 | WO2004032579A1 Discharge lighting bulbs control system |
| 04/15/2004 | WO2004032315A1 Dc/ac conversion device and ac power supply method |
| 04/15/2004 | WO2004032179A2 Light source |
| 04/15/2004 | US20040070352 Method for color mixing with arc stability and straightening of HID lamps operated at high frequencies using duty cycle modulation |
| 04/15/2004 | DE20319342U1 High frequency power supply for groups of cold-cathode fluorescent lamps used in display, connects each lamp to power supply by individual transformer |
| 04/15/2004 | DE19900889B4 Bausatz zum Umrüsten von Leuchten mit geraden, beidseitig gesockelten Leuchtstofflampen, von induktivem auf elektronischen Betrieb Kit for retrofitting lights with straight, double-capped fluorescent lamps from inductive to electronic equipment |
| 04/15/2004 | DE19627989B4 Schaltungsanordnung zum Konstanthalten einer an einen Lastwiderstand abgegebenen Leistung Circuitry for maintaining a power delivered to a load resistor |
| 04/14/2004 | EP1408723A2 Device for operating a high pressure discharge lamp |
| 04/14/2004 | EP1407639A1 Remote control of electronic light ballast and other devices field of the invention |
| 04/14/2004 | EP0800724B1 Lamp oscillator for atomic frequency standards |
| 04/14/2004 | CN2612206Y Electronic ballast of long service fluorescent lamp |
| 04/14/2004 | CN2612205Y Dual-purpose electronic ballast for fluorescent lamp and gas discharge lamp |
| 04/14/2004 | CN2612204Y Electronic ballast of high power factor and light modulatable high pressure gas discharge lamp |
| 04/14/2004 | CN1489290A Power-supply operation circuit with improved driving circuit |
| 04/14/2004 | CN1488582A Bulb assembly capable of generating electromagnetic radiation and used in lamp assembly |
| 04/14/2004 | CN1146307C Working circuit for discharging lamp with covertible working state |
| 04/14/2004 | CN1146306C Discharge-lamp control apparatus |
| 04/13/2004 | US6720741 Electronic ballast having open circuit in output |
| 04/13/2004 | US6720740 Discharge lamp ballast circuit having snubber circuit |
| 04/13/2004 | US6720739 Ballast with protection circuit for quickly responding to electrical disturbances |