Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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10/13/1998 | US5821702 Discharge lamp control circuit using a luminous flux table |
10/13/1998 | US5821699 Ballast circuit for fluorescent lamps |
10/13/1998 | US5821696 Method and circuit to start and operate high pressure discharge lamps |
10/13/1998 | US5820252 Light fixture housing |
10/08/1998 | WO1998044764A1 Power supply system for a group of lamps |
10/08/1998 | DE19739740A1 Light radiation control device for vehicle gas discharge lamp |
10/08/1998 | DE19739531A1 Light radiation control device for vehicle gas discharge lamp |
10/08/1998 | DE19713262A1 Automatic gas discharge lamp switching device |
10/08/1998 | DE19708783C1 Verfahren und Vorrichtung zum Regeln des Betriebsverhaltens von Gasentladungslampen Method and device for regulating the operating behavior of gas discharge lamps, |
10/08/1998 | CA2284892A1 Power supply system for a group of lamps |
10/07/1998 | EP0869602A2 Power supply device |
10/07/1998 | EP0869536A2 Neon gas discharge lamp providing white light |
10/07/1998 | EP0869529A2 Discharge tube |
10/07/1998 | EP0868833A1 High-pressure discharge lamp with an auxiliary ignition electrode as well as circuitry and process for operation |
10/07/1998 | CN1195464A Circuit arrangement |
10/07/1998 | CN1040162C Multifunctional universal electricity saving switch |
10/07/1998 | CN1040145C Serial tubular electronic fluorescent light |
10/06/1998 | US5818709 Inverter apparatus |
10/06/1998 | US5818675 Protection device for electronic circuits |
10/06/1998 | US5818669 Zener diode power dissipation limiting circuit |
10/06/1998 | US5818181 Neon lamp isolation transformer for mid-point commoned neon lamps |
10/06/1998 | US5818176 Circuit arrangement for the operation of discharge lamps |
10/06/1998 | US5818175 Gas discharge image display |
10/06/1998 | US5818172 Lamp control circuit having a brightness condition controller having 2.sup.nrd and 4th current paths |
10/06/1998 | US5818167 Electrodeless high intensity discharge lamp having a phosphorus fill |
09/30/1998 | EP0868115A2 Circuit for ignition of a HID lamp |
09/30/1998 | EP0867061A1 Power supply for non-linear loads |
09/30/1998 | EP0715779B1 Circuit arrangement |
09/30/1998 | CN1194569A Circuit for protecting fluorescent lamp from overload |
09/30/1998 | CN1194493A Power supply device |
09/29/1998 | US5815388 Polarity reversing circuit having energy compensation |
09/29/1998 | US5815067 Single control wire device for HID dimming |
09/29/1998 | US5814976 For operating a high pressure gas discharge lamp |
09/29/1998 | US5814971 Emergency florescent inverter for magnetic and electronic ballasts |
09/29/1998 | US5814951 Low-pressure discharge lamp containing a partition therein |
09/29/1998 | US5814949 Automatic pulse generator cuttoff with capacitors connected on both sides of the primary winding of the trigger transformer |
09/29/1998 | US5814948 Flash circuit for low cost cameras |
09/29/1998 | US5814938 For providing high voltage power to a cold cathode tube |
09/24/1998 | WO1998042165A1 Ballast method and apparatus and coupling therefor |
09/24/1998 | CA2286972A1 Ballast method and apparatus and coupling therefor |
09/23/1998 | EP0866647A2 Circuit for operating a high pressure discharge lamp with a starting period shunting mode |
09/23/1998 | EP0866646A2 Process and circuit for operating at least one discharge lamp |
09/23/1998 | EP0865673A1 Piezo-electric transformer |
09/23/1998 | EP0771492B1 Servo-amplifier for controlling a high-ohmic low-voltage source |
09/23/1998 | CN2292368Y Electronic ballast for neon lamp |
09/23/1998 | CN1193839A 电源装置和放电灯点灯装置 The power supply device and a discharge lamp lighting device |
09/22/1998 | US5811942 Device for optimized management of fluorescent lamps |
09/22/1998 | US5811941 High frequency electronic ballast for a high intensity discharge lamp |
09/22/1998 | US5811940 Phase-shift lamp control |
09/22/1998 | US5811939 Bi-level control system for lighting and other applications |
09/22/1998 | US5811938 Emergency lighting ballast for starting and operating two compact fluorescent lamps with integral starter |
09/22/1998 | US5811937 Bulb-type electronic energy-saving lamp |
09/22/1998 | US5811914 Electrodeless low-pressure discharge lamp |
09/22/1998 | US5811892 Power supply system including mechanical output switches for use with a plurality of display tubes |
09/18/1998 | CA2232328A1 Process and circuit arrangement for operation of at least one discharge lamp |
09/16/1998 | EP0864247A1 Input circuit for the starter of a high-pressure gas-filled discharge lamp |
09/16/1998 | CN1193451A Circuit arrangement |
09/16/1998 | CN1193413A Integrated HID reflector lamp |
09/16/1998 | CN1193250A Switch-over control for working circuit |
09/15/1998 | US5808597 Illumination device for liquid crystal display apparatus |
09/15/1998 | US5808450 Special alternator assembly with an inherent ballast impedance characteristic for lighting systems |
09/15/1998 | US5808423 Lighting control for reducing energy consumption |
09/15/1998 | US5808422 Lamp ballast with lamp rectification detection circuitry |
09/15/1998 | US5808421 Ballast circuit having dual voltage source and emergency battery |
09/15/1998 | US5808414 Electrodeless fluorescent lamp with an electrically conductive coating |
09/15/1998 | US5808402 Discharge lamp |
09/15/1998 | US5806272 Foam core spacer assembly |
09/11/1998 | WO1998039951A1 Electronic ballast |
09/11/1998 | WO1998039950A1 Method and device for controlling the operation of gas discharge lamps |
09/11/1998 | WO1998039949A1 Control switch and electronic ballast with said control switch |
09/11/1998 | WO1998039948A1 Method and device for detecting the rectification effect occurring in a gas discharge lamp |
09/10/1998 | DE19757295A1 Elektronisches Vorschaltgerät Electronic ballast |
09/10/1998 | DE19708792A1 Verfahren und Vorrichtung zum Erfassen des in einer Gasentladungslampe auftretenden Gleichrichteffekts Method and apparatus for detecting the rectifier effect appearing in a gas discharge lamp |
09/10/1998 | DE19708791A1 Steuerschaltung und elektronisches Vorschaltgerät mit einer derartigen Steuerschaltung Control circuit and electronic ballast with such a control circuit |
09/09/1998 | EP0863690A2 Self oscillating circuit |
09/09/1998 | EP0863603A1 Circuit for protecting fluorescent lamp from overload |
09/09/1998 | EP0818127A4 Lamp protective, electronic ballast |
09/09/1998 | CN2290967Y 电子镇流器 Electronic Ballast |
09/09/1998 | CN2290966Y Multi-tube energy saving electronic ballast |
09/09/1998 | CN2290965Y High power factor compact fluorescent lamp |
09/09/1998 | CN1192646A Electronic ballast for fluorescent lamp |
09/09/1998 | CN1039766C Fluorescent lamp controlling arrangement |
09/08/1998 | US5806055 Solid state ballast system for metal halide lighting using fuzzy logic control |
09/08/1998 | US5805399 Apparatus for detecting luminous tube and power supply faults where ground fault currents may be absent |
09/08/1998 | US5804926 Lighting circuit that includes a comparison of a "flattened" sinewave to a full wave rectified sinewave for control |
09/08/1998 | US5804924 Discharge lamp with two voltage levels |
09/07/1998 | CA2226604A1 Neon gas discharge lamp providing white light |
09/03/1998 | WO1998038840A1 Discharge lamp lighting equipment and illuminating system |
09/03/1998 | WO1998038708A1 Lighting apparatus for discharge lamps and discharge lamp socket used therein |
09/03/1998 | WO1998038667A1 Power transformer circuit with resonator |
09/03/1998 | DE19708187A1 Lamp circuit control |
09/03/1998 | DE19708148A1 Electrodeless ultraviolet gas discharge lamp excited by high frequency oscillator |
09/02/1998 | EP0861574A1 Power supply for light sources, particularly for the quick ignition of fluorescent lamps and the like |
09/02/1998 | EP0643900B1 Electrodeless discharge lamp containing push-pull class e amplifier and bifilar coil |
09/02/1998 | CN2290166Y D. C. Lighting installation |
09/02/1998 | CN2290165Y Electric-saving electronic ballast for fluorescent lamp |
09/02/1998 | CN1192118A Operation circuit of low-voltage discharge lamp using low-voltage power-supply |
09/01/1998 | US5801495 Low-pressure discharge lamp containing partitions therein |
09/01/1998 | US5801494 Rapid restrike with integral cutout timer |
09/01/1998 | US5801492 Electronic energy converter to supply a high frequency signal to a load |