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Class Information
Number: 315/209R
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit
Description:
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5825138 |
Timing of different phases in an ignition circuit |
Oct. 20, 1998 |
| 5821701 |
Boost regulator circuit with stoarge capacitor for reduced power consumption |
Oct. 13, 1998 |
| 5811937 |
Bulb-type electronic energy-saving lamp |
Sep. 22, 1998 |
| 5811938 |
Emergency lighting ballast for starting and operating two compact fluorescent lamps with integral starter |
Sep. 22, 1998 |
| 5808420 |
Alternating current generator for controlling a plasma display screen |
Sep. 15, 1998 |
| 5804924 |
Discharge lamp with two voltage levels |
Sep. 8, 1998 |
| 5804925 |
Modulator for generating high power electric pulses |
Sep. 8, 1998 |
| 5806055 |
Solid state ballast system for metal halide lighting using fuzzy logic control |
Sep. 8, 1998 |
| 5801491 |
Supply circuit for discharge lamps with means for preheating the electrodes |
Sep. 1, 1998 |
| 5801492 |
Electronic ballast for gas discharge lamp having primary and auxiliary resonant circuits |
Sep. 1, 1998 |
| 5798617 |
Magnetic feedback ballast circuit for fluorescent lamp |
Aug. 25, 1998 |
| 5798620 |
Fluorescent lamp dimming |
Aug. 25, 1998 |
| 5796213 |
Inverter power source apparatus using a piezoelectric transformer |
Aug. 18, 1998 |
| 5796214 |
Ballast circuit for gas discharge lamp |
Aug. 18, 1998 |
| 5796215 |
Soft start circuit for self-oscillating drivers |
Aug. 18, 1998 |
| 5789866 |
Electronic ballast with reversely wound filament winding |
Aug. 4, 1998 |
| 5789870 |
Low noise inverter for EL lamp |
Aug. 4, 1998 |
| 5783911 |
Circuit arrangement for operating electric lamps, and operating method for electric lamps |
Jul. 21, 1998 |
| 5777861 |
Power supply apparatus having high power-factor and low distortion-factor characteristics |
Jul. 7, 1998 |
| 5773937 |
Discharge lamp-lighting apparatus for straightening arc discharge |
Jun. 30, 1998 |
| 5770926 |
Feedback control system of an electronic ballast which detects arcing of a lamp |
Jun. 23, 1998 |
| 5767631 |
Power supply and electronic ballast with low-cost inverter bootstrap power source |
Jun. 16, 1998 |
| 5757140 |
Electronic ballast with frequency control |
May. 26, 1998 |
| 5757143 |
Discharge lamp control circuit with feedback loop to lower harmonic distortion |
May. 26, 1998 |
| 5757144 |
Gas discharge lamp ballasting means |
May. 26, 1998 |
| 5747941 |
Electronic ballast that monitors direct current through lamp filaments |
May. 5, 1998 |
| 5747942 |
Inverter for an electronic ballast having independent start-up and operational output voltages |
May. 5, 1998 |
| 5747943 |
MOS gate driver integrated circuit for ballast circuits |
May. 5, 1998 |
| 5744912 |
Electronic ballast having an oscillator shutdown circuit for single or multiple fluorescent tubes for lamps |
Apr. 28, 1998 |
| 5744915 |
Electronic ballast for instant-start lamps |
Apr. 28, 1998 |
| 5742132 |
Method and system for starting and operating a discharge lamp |
Apr. 21, 1998 |
| 5742134 |
Inverter driving scheme |
Apr. 21, 1998 |
| 5739644 |
Discharge lamp typically a sodium high-pressure discharge lamp, from an a-c power network |
Apr. 14, 1998 |
| 5739645 |
Electronic ballast with lamp flash protection circuit |
Apr. 14, 1998 |
| 5736819 |
Parallel-tuned electronic ballast with special output voltage waveform |
Apr. 7, 1998 |
| 5734229 |
Back-up electrical system for portable table lamps |
Mar. 31, 1998 |
| 5734232 |
Circuit arrangement |
Mar. 31, 1998 |
| 5729096 |
Inverter protection method and protection circuit for fluorescent lamp preheat ballasts |
Mar. 17, 1998 |
| 5726537 |
Circuit for pulsed operation of a discharge lamp |
Mar. 10, 1998 |
| 5723953 |
High voltage IC-driven half-bridge gas discharge lamp ballast |
Mar. 3, 1998 |
| 5719471 |
Three-way dimming circuit for compact fluorescent lamp |
Feb. 17, 1998 |
| 5717295 |
Lamp power supply circuit with feedback circuit for dynamically adjusting lamp current |
Feb. 10, 1998 |
| 5714846 |
Minimum harmonic distortion operating circuit for at least one low-pressure discharge lamp |
Feb. 3, 1998 |
| 5712536 |
Reduced bus voltage integrated boost high power factor circuit |
Jan. 27, 1998 |
| 5710489 |
Overvoltage and thermally protected electronic ballast |
Jan. 20, 1998 |
| 5708330 |
Resonant voltage-multiplication, current-regulating and ignition circuit for a fluorescent lamp |
Jan. 13, 1998 |
| 5705894 |
Method for operating at least one fluorescent lamp with an electronic ballast, as well as ballast therefor |
Jan. 6, 1998 |
| 5705896 |
Control electronic ballast system using feedback |
Jan. 6, 1998 |
| 5705898 |
Lighting circuit for discharge lamp which restricts inversion of output voltage polarity |
Jan. 6, 1998 |
| 5703438 |
Line current filter for less than 10% total harmonic distortion |
Dec. 30, 1997 |
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