Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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11/02/1988 | CN87211040U Parallel type duplex tube ballast |
11/01/1988 | US4782386 Video endoscope with a light source operable in a continuous or stroboscopic mode |
11/01/1988 | US4782268 Low-pressure discharge lamp, particularly fluorescent lamp high-frequency operating circuit with low-power network interference |
10/26/1988 | CN87213626U Universal power-saving fluorescent lamp with an extension pedestal |
10/20/1988 | WO1988008241A1 Apparatus and method for forming segmented luminosity in gas discharge tubes |
10/19/1988 | CN88212791U 多功能太阳能荧光灯 Multifunctional Solar Fluorescent |
10/19/1988 | CN88201060U Power-saving electric source for neon light |
10/19/1988 | CN88105405A 电极型荧光灯 Electrode Fluorescent Lamp |
10/19/1988 | CN87208679U Power-saving life-prolonging switch for fluorescent lamp |
10/19/1988 | CN87102370A Dc pulse convertor |
10/12/1988 | CN87212090U Electronic ballast |
10/12/1988 | CN87210949U Strobo suppressor of fluorescent lamp |
10/11/1988 | US4777625 Divided-bit line type dynamic semiconductor memory with main and sub-sense amplifiers |
10/11/1988 | US4777507 Control system for an electronic flash unit |
10/11/1988 | US4777410 High intensity discharge lamp |
10/11/1988 | US4777409 Fluorescent lamp energizing circuit |
10/11/1988 | US4777408 Electronic adornment for simulating natural flickering light |
10/11/1988 | CA1243073A1 Method and apparatus for the stabilization of direct current arc lamps |
10/11/1988 | CA1243072A1 High-pressure discharge lamp |
10/06/1988 | DE3710278A1 Arrangement for monitoring a fluorescent lamp |
10/05/1988 | EP0285049A1 Device for starting and operating a fluorescent lamp |
10/05/1988 | CN88211325U Multifunction fluorescent lamp eletronic ballast |
10/05/1988 | CN87214500U Multifunction electronic switch of fluorescent lamp |
10/05/1988 | CN87204517U 一种电子镇流器 An electronic ballast |
10/04/1988 | US4775822 Power network fluorescent lamp operating circuit |
09/29/1988 | DE3709004A1 Circuit arrangement for supplying a fluorescent lamp |
09/28/1988 | EP0155303B1 Inverter circuit with a control circuit for leading transistors more effectively into a turned-off state |
09/28/1988 | CN88200137U Daylight lamp with light-regulating |
09/28/1988 | CN87209669U Double-tube ballast |
09/22/1988 | WO1988007316A1 Activating lighted signs |
09/21/1988 | EP0282488A1 A high intensity discharge lamp self-adjusting ballast system with current limiters and a current feed-back loop |
09/21/1988 | CN87209967U Electronic long-life fluorescent tube |
09/14/1988 | CN87217163U Ac pulse ballast |
09/14/1988 | CN87217123U Electronic ballast for fluorescent lamp |
09/14/1988 | CN87211541U Electronic energy saving trigger for fluorescent lamp |
09/14/1988 | CN87208710U Electronic cushioning starter for fluorcseent lamp |
09/14/1988 | CN87204214U 节能高频电子镇流器 Energy-saving high-frequency electronic ballast |
09/14/1988 | CN87105959A Circuit arrangement for operation of high-pressure gas discharge lamps by means of pulsatory supply current |
09/13/1988 | US4771301 Apparatus for flash photography |
09/06/1988 | US4769578 High-pressure sodium discharge lamp |
08/31/1988 | CN87216462U Fluorescent lamp without preheating and without glow-starter |
08/31/1988 | CN87213031U Long-life dc fluorescent lamp inverter |
08/24/1988 | EP0279489A1 DC-AC converter for supplying a gas and/or vapour discharge lamp |
08/24/1988 | EP0279073A2 Circuit arrangement for the high-frequency operation of fluorescent lamps having pre-heating electrodes |
08/24/1988 | CN87212573U Fast switch starter for fluorescent lamp |
08/24/1988 | CN86209387U Light-variable fluorescent lamp |
08/23/1988 | US4766353 Lamp switching circuit and method |
08/23/1988 | US4766352 Method and apparatus for starting and operating fluorescent lamp and auxiliary ballast systems at reduced power levels |
08/23/1988 | US4766350 Electric circuit with transient voltage doubling for improved operation of a discharge lamp |
08/18/1988 | DE3703272A1 Electronic ballast for dimming fluorescent lamps and neon tubes |
08/17/1988 | EP0278468A2 System for lighting fluorescent lamps |
08/17/1988 | CN87208644U Glow self-starting switch of fluorescent lamp |
08/10/1988 | EP0277605A1 Ballast for gas discharge lamps |
08/10/1988 | CN87216250U Electronic ballast for fluorescent lamp |
08/10/1988 | CN87215861U High-frequency power supply arrangement for neon light |
08/10/1988 | CN87215509U High-efficency electronic energy-saving lamp |
08/10/1988 | CN87208883U Automatic ignitor for fluorescent lamp |
08/09/1988 | US4763239 Switched mode power supplies |
08/09/1988 | US4763044 Start, hot restart and operating lamp circuit |
08/03/1988 | EP0276460A1 Circuit arrangement for operating a low-pressure discharge lamp |
08/03/1988 | EP0276266A1 Circuit for starting and operating a gas discharge lamp |
08/03/1988 | CN87213587U Starting and brightness-adjustment device for fluorescent lamp |
08/02/1988 | US4761585 Fitting for compact electric discharge lamps |
08/02/1988 | US4761583 Arc discharge lamps containing a radioactive alloy coating of lanthanum, nickel, uranium and-or thorium |
08/02/1988 | CA1239979A1 Compact igniter for discharge lamps |
07/27/1988 | EP0275586A1 Switching arrangement |
07/27/1988 | CN88210038U Fluorescent lamp starter with four foots |
07/27/1988 | CN88200283U Fluorescent lamp ballast with multi-outputs |
07/27/1988 | CN88100155A Circuit and device with long life for rapid starting of fluore-scent tube with cold cathode |
07/27/1988 | CN87212281U Electrical ballast with protective circuit |
07/27/1988 | CN87209066U Three-purpose sunlight desk lamp |
07/27/1988 | CN87204706U Pullswitch capable of substituting starter |
07/14/1988 | DE3644788A1 Circuit arrangement for operating low-pressure discharge lamps in individual mode and tandem mode |
07/13/1988 | CN87206495U Adjustable mercury-xenon head-light for locomotive |
07/13/1988 | CN87204498U Multi-functional energy-saving electronic starter for fluorescent tube |
07/12/1988 | US4757238 Low voltage fluorescent lighting system |
07/06/1988 | CN87210464U Electricity-saving fluorescent lamp ballast |
07/05/1988 | CA1238945A1 Electronic high frequency controlled device for operating gas discharge lamps |
07/05/1988 | CA1238944A1 Neon sign control device |
06/29/1988 | EP0272701A2 Apparatus for controlling charging of main capacitor of flash unit |
06/29/1988 | CN87205770U Multi-tap adjustable fluorescent-lamp ballast |
06/29/1988 | CN87107403A Switching arrangement |
06/28/1988 | US4754389 Voltage regulating circuitry for a DC to DC converter |
06/28/1988 | US4754201 Magnetic low load factor series ballast circuit |
06/28/1988 | US4754198 Circuit breaker |
06/22/1988 | CN87210212U Dividing self-triggered ballast |
06/21/1988 | CA1238359A1 High-pressure high-frequency discharge lamp |
06/16/1988 | WO1988004517A1 Programmable multicircuit wall-mounted controller |
06/15/1988 | EP0271396A1 Process and device for igniting discharge lamps |
06/15/1988 | EP0271083A2 Interchangeable flash device |
06/14/1988 | US4751436 Electronic flash device for a camera |
06/14/1988 | US4751398 Lighting system for normal and emergency operation of high intensity discharge lamps |
06/14/1988 | CA1238078A1 Output circuit for an electronic ballast system |
06/08/1988 | EP0270183A1 Circuit arrangement for operating high-pressure gas discharge lamps by means of a pulse-shaped supply current |
06/08/1988 | EP0258223A4 Ballast for ionic conduction lamps. |
06/07/1988 | US4749916 Illuminator for cultivating plant |
06/07/1988 | US4749915 Microwave powered electrodeless light source utilizing de-coupled modes |
06/07/1988 | US4749914 Circuit system for igniting and operating a high-pressure discharge lamp, particularly a sodium vapor lamp |
06/07/1988 | US4749913 Operating circuit for a direct current discharge lamp |
06/07/1988 | US4749909 Compact igniter for discharge lamps |