| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 08/10/1994 | EP0610067A1 Electronic ballast with built-in timed power saver and photoelectric switching for high-pressure mercury vapour, metallic vapour and sodium vapour lamps |
| 08/10/1994 | EP0609989A1 Starting circuit for an electrodeless high intensity discharge lamp employing a visible light radiator |
| 08/10/1994 | EP0609420A1 Apparatus for pulsed electrical power circuitry. |
| 08/10/1994 | CN2174025Y Glow-starting ballast |
| 08/10/1994 | CN2174024Y Induction type high-efficiency contactless low-temp. low-voltage glow starter |
| 08/10/1994 | CN2174023Y Electronic noiseless energy-saving glow-starting ballast |
| 08/10/1994 | CN2174022Y Energy-saver for fluorescent lamp |
| 08/10/1994 | CN1090705A Circuit arrangement |
| 08/09/1994 | US5336976 Illumination warm-up control in a document scanner |
| 08/09/1994 | US5336974 High-pressure discharge lamp |
| 08/09/1994 | CA2115122A1 Fluorescent lamp operating circuit |
| 08/09/1994 | CA2114989A1 Fluorescent lamp ballast |
| 08/05/1994 | WO1994018811A1 Method for feeding a plurality of discharge or fluorescent lamps connected in series, and apparatus that carries out such method |
| 08/05/1994 | CA2133564A1 Method for feeding a plurality of discharge or fluorescent lamps connected in series, and apparatus that carries out such method |
| 08/04/1994 | DE4302121A1 Control circuit for a gas discharge lamp |
| 08/03/1994 | CN2173492Y Electronic neon lamp automatically controlled by single-board microcomputer |
| 08/03/1994 | CN2173486Y Electronic starter for fluorescent lamp |
| 08/03/1994 | CN1090459A 镇流电路 Ballast circuit |
| 08/03/1994 | CN1090458A Circuit arrangement |
| 08/02/1994 | US5334915 Operating circuit arrangement for a discharge lamp |
| 08/02/1994 | US5334912 Ground fault detector and associated logic for an electronic ballast |
| 08/02/1994 | CA2114831A1 Electronic ballast with built-in times power saver and photoelectric switching for high-pressure mercury vapor, metallic vapor and sodium vapor lamps |
| 08/02/1994 | CA2042606C Method and apparatus for improving signal to noise ratio in a telecine machine |
| 07/27/1994 | EP0608061A2 Water treatment system bulb status monitor circuit |
| 07/27/1994 | EP0608016A1 Driving circuit for bipolar transistors and ballast inverter provided with such circuit |
| 07/27/1994 | EP0607600A1 Process and circuit for controlling the colour temperature of a high pressure sodium lamp |
| 07/27/1994 | EP0607599A1 Process and circuit for stably driving a high pressure sodium lamp |
| 07/27/1994 | EP0525133A4 Fail-safe uninterruptible lighting system |
| 07/27/1994 | EP0511282B1 Radio-frequency driven display |
| 07/27/1994 | CN2172939Y Energy-saving glow-starting ballast for fluorescent lamps |
| 07/27/1994 | CN2172938Y Double-source glow-starting ballast for light tube |
| 07/27/1994 | CN2172937Y Power converter for multi-tube fluorescent lamps |
| 07/27/1994 | CN1090121A Color mixing method for variable color lighting and variable color luminatire for use with the method |
| 07/27/1994 | CN1090120A Electronic ballast for hot cathode discharge lamps |
| 07/27/1994 | CN1090119A High power factor electronic lamp with protector for abnormal condition |
| 07/27/1994 | CN1090118A Hibernating-type universal fluorescence lamp starter |
| 07/26/1994 | US5332970 Method for measuring the impedance of an electrodeless arc discharge lamp |
| 07/26/1994 | US5332951 Circuit for driving gas discharge lamps having protection against diode operation of the lamps |
| 07/21/1994 | WO1994016492A1 Power supply |
| 07/21/1994 | WO1994016429A1 Backlighting for liquid crystal display |
| 07/21/1994 | DE4301184A1 Control unit for electrical discharge lamps |
| 07/21/1994 | CA2132002A1 Power supply |
| 07/20/1994 | EP0606665A1 Circuit arrangement |
| 07/20/1994 | EP0606664A1 Ballast circuit |
| 07/20/1994 | CN2172560Y Multi-source fluorescent lamp energy saving switch |
| 07/20/1994 | CA2113692A1 Method of controlling the color temperature in a sodium high-pressure discharge lamp, and apparatus to carry out the method |
| 07/20/1994 | CA2113688A1 Method of supplying current to a sodium high-pressure discharge lamp, and current supply system |
| 07/20/1994 | CA2113495A1 Driving circuit for bipolar transistors and ballast inverter provided with such circuit |
| 07/20/1994 | CA2111072A1 Starting circuit for an electrodeless high intensity discharge lamp employing a visible light radiator |
| 07/19/1994 | US5331534 Power supply apparatus |
| 07/19/1994 | US5331433 Image reader |
| 07/19/1994 | US5331254 Starting circuit for an electrodeless high intensity discharge lamp employing a visible light radiator |
| 07/19/1994 | US5331253 Electronic ballast for gaseous discharge lamp operation |
| 07/14/1994 | DE4300399A1 Hf operation circuit for fluorescent lamp |
| 07/13/1994 | CN2171972Y Starter change-over switch |
| 07/13/1994 | CN2171971Y Efficient energy-saving quick start ballast for fluorescent lamp |
| 07/13/1994 | CN2171970Y Electric capacity fluorescent lamp ballast |
| 07/13/1994 | CN1089422A Electronic ballast of fluorescent lamp for ship |
| 07/13/1994 | CN1089342A Electronic ballast for tube-shape electronic fluorescent lamp |
| 07/12/1994 | US5329209 Self-oscillating circuit for driving a gas discharge lamp, particularly for use on board a motor vehicle |
| 07/07/1994 | WO1994015444A1 Ballast for at least one pair of gas discharge lamps in parallel |
| 07/07/1994 | WO1994015251A1 Photographic flash apparatus |
| 07/07/1994 | DE4400412A1 Vehicle lighting system with discharge lamp and voltage step-up circuit |
| 07/06/1994 | EP0605052A1 Ballast for gas discharge lamps |
| 07/06/1994 | EP0604935A1 Power balanced coupling structure for electrodeless discharge lamp |
| 07/06/1994 | EP0604924A1 Microwave powered vehicle lamp |
| 07/06/1994 | EP0604902A1 Gas discharge image display |
| 07/06/1994 | EP0604643A1 Power supply circuit |
| 07/06/1994 | EP0236423B1 Switched capacitive ballasts for discharge lamps |
| 07/06/1994 | CN2171190Y High voltage pulse starting type daylight tube holder |
| 07/06/1994 | CN2171189Y Electronic starting switch for daylight lamp |
| 07/05/1994 | US5327049 Electrodeless low-pressure discharge lamp with plasma channel |
| 07/05/1994 | US5327048 Bi-level lighting control system for hid lamps |
| 07/05/1994 | US5327046 High pressure discharge lamp having overcurrent fuse protection |
| 06/30/1994 | CA2112321A1 Microwave powered vehicle lamp |
| 06/29/1994 | EP0604133A2 Auto-starting for an electrodeless high intensity discharge lamp |
| 06/29/1994 | CN2170617Y Starter for fluorescent lamp |
| 06/29/1994 | CN2170616Y Starter for electronic long-life energy-saving lamp |
| 06/29/1994 | CN2170564Y Inductance coil with heat-radiating metal piece |
| 06/29/1994 | CN2170435Y Atmosphere light-regulating fluorescent lamp device |
| 06/29/1994 | CN1088724A Circuit arrangement for operating a discharge lamp |
| 06/29/1994 | CA2112434A1 Ballast for gas discharge lamp |
| 06/28/1994 | US5325024 Light source including parallel driven low pressure RF fluorescent lamps |
| 06/28/1994 | US5325018 Electrodeless fluorescent lamp shield for reduction of electromagnetic interference and dielectric losses |
| 06/28/1994 | US5325017 High-pressure discharge lamp having solid state getter mounted on bimetallic element |
| 06/28/1994 | US5324423 UV bulb intensity control for water treatment system |
| 06/25/1994 | CA2110004A1 Auto-starting system for an electrodeless high intensity discharge lamp |
| 06/23/1994 | WO1994014302A1 Electric circuit for gas discharge lamp |
| 06/23/1994 | WO1994014301A1 Automatic light dimmer for gas discharge lamps |
| 06/22/1994 | EP0602908A1 High power factor circuit for powering a load |
| 06/22/1994 | EP0602719A1 High frequency inverter for a discharge lamp with preheatable electrodes |
| 06/22/1994 | EP0602584A1 Apparatus for lowering the sound level of a ballast |
| 06/22/1994 | EP0602368A1 Ballast for ignition and operation of high pressure gas discharge lamps |
| 06/22/1994 | CN2169970Y 音乐霓虹灯驱动装置 Music neon drive |
| 06/22/1994 | CN2169969Y Outdoor packaged neon lamp high frequency power saving transformer |
| 06/22/1994 | CN1088381A Electronic ballast of fluorescent light |
| 06/22/1994 | CN1088380A Double-light energy-saving daylight lamp |
| 06/21/1994 | US5323090 Lighting system with variable control current sensing ballast |
| 06/21/1994 | US5323089 Method for the pulsed mode of operation of high-pressure discharge lamps |
| 06/16/1994 | DE4341669A1 Lighting system using mixture of different light source colours - has mixing ratios determined to provide lighting colour effects with coordinate plane |