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Class Information
Number: 315/308
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation > Automatic regulation > Regulator responsive to plural conditions
Description: Systems wherein the regulating means is responsive to two or more conditions; such as, the current and the voltage of the circuit, or a condition of the load device and the current or voltage of the circuit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5838117 |
Ballast circuit with synchronization and preheat functions |
Nov. 17, 1998 |
| 5834903 |
Double resonant driver ballast for gas lamps |
Nov. 10, 1998 |
| 5828177 |
Light circuit for discharge lamp |
Oct. 27, 1998 |
| 5828178 |
High intensity discharge lamp color |
Oct. 27, 1998 |
| 5814976 |
High power factor electronic ballast |
Sep. 29, 1998 |
| 5811941 |
High frequency electronic ballast for a high intensity discharge lamp |
Sep. 22, 1998 |
| 5786671 |
Electronic ballast circuit having voltage reducing transformer |
Jul. 28, 1998 |
| 5783908 |
Lighting circuit wherein the abnormality detection circuit gets its power directly from the auxiliary power supply section |
Jul. 21, 1998 |
| 5757141 |
MOSgate driver for ballast circuits |
May. 26, 1998 |
| 5757145 |
Dimming control system and method for a fluorescent lamp |
May. 26, 1998 |
| 5751121 |
High voltage discharge bulb control |
May. 12, 1998 |
| 5751120 |
DC operated electronic ballast for fluorescent light |
May. 12, 1998 |
| 5747947 |
Gain controlled control signal based on sensed lamp current |
May. 5, 1998 |
| 5744916 |
Discharge tube lighting apparatus |
Apr. 28, 1998 |
| 5742132 |
Method and system for starting and operating a discharge lamp |
Apr. 21, 1998 |
| 5739640 |
Low line voltage detection control module and method for a fluorescent lamp |
Apr. 14, 1998 |
| 5739643 |
Device for supplying electric power to flashlamp and method thereof |
Apr. 14, 1998 |
| 5739645 |
Electronic ballast with lamp flash protection circuit |
Apr. 14, 1998 |
| 5726534 |
Preheat current control circuit based upon the number of lamps detected |
Mar. 10, 1998 |
| 5714847 |
Power regulator |
Feb. 3, 1998 |
| 5705898 |
Lighting circuit for discharge lamp which restricts inversion of output voltage polarity |
Jan. 6, 1998 |
| 5703441 |
Multi-function filament-heater power supply for an electronic ballast for long-life dimmerable lamps |
Dec. 30, 1997 |
| 5698952 |
Method and apparatus for direct current pulsed ionization lighting |
Dec. 16, 1997 |
| 5696431 |
Inverter driving scheme for capacitive mode protection |
Dec. 9, 1997 |
| 5691607 |
Modular high power modulator |
Nov. 25, 1997 |
| 5680015 |
Method to operate a discharge lamp, and circuit arrangement for operation of the discharge lamp |
Oct. 21, 1997 |
| 5680017 |
Driving scheme for minimizing ignition flash |
Oct. 21, 1997 |
| 5668446 |
Energy management control system for fluorescent lighting |
Sep. 16, 1997 |
| 5663613 |
Lighting circuit for discharge lamp |
Sep. 2, 1997 |
| 5654611 |
Lamp control circuit having a V-I converter with slopes of different magnitudes and a second resistor connected in series with a first such that the second senses the output current of the V-I |
Aug. 5, 1997 |
| 5652481 |
Automatic state tranition controller for a fluorescent lamp |
Jul. 29, 1997 |
| 5629588 |
Lighting circuit utilizing DC power for a discharge lamp utilizing AC power |
May. 13, 1997 |
| 5625258 |
Clocked power supply |
Apr. 29, 1997 |
| 5623187 |
Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control |
Apr. 22, 1997 |
| 5610480 |
Control apparatus for copying machine or the like |
Mar. 11, 1997 |
| 5583402 |
Symmetry control circuit and method |
Dec. 10, 1996 |
| 5581158 |
Lamp brightness control circuit with ambient light compensation |
Dec. 3, 1996 |
| 5572094 |
Lighting circuit for discharge lamp |
Nov. 5, 1996 |
| 5569984 |
Method and controller for detecting arc instabilities in gas discharge lamps |
Oct. 29, 1996 |
| 5565743 |
Lighting circuit for discharge lamp |
Oct. 15, 1996 |
| 5563477 |
Method for operating a ballast for discharge lamps |
Oct. 8, 1996 |
| 5545955 |
MOS gate driver for ballast circuits |
Aug. 13, 1996 |
| 5537006 |
Power supply |
Jul. 16, 1996 |
| 5530321 |
Power supply for a gas discharge lamp |
Jun. 25, 1996 |
| 5530319 |
Power supply circuit for a discharge lamp and use of and method of operating the same |
Jun. 25, 1996 |
| 5525869 |
Efficient battery operated inverter circuit for capacitive loads such as electroluminescent lamps |
Jun. 11, 1996 |
| 5523656 |
High pressure discharge lamp operating circuit with light control during lamp run up |
Jun. 4, 1996 |
| 5514938 |
D.C. ciruit for starting high pressure discharge lamp |
May. 7, 1996 |
| 5514935 |
Lighting circuit for vehicular discharge lamp |
May. 7, 1996 |
| 5506480 |
Paired dimmers for controlling harmonic currents |
Apr. 9, 1996 |
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