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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 |
| 5500575 |
Switchmode AC power controller |
Mar. 19, 1996 |
| 5500573 |
Dimmer circuit for gas discharge lamps having electronic ballasts |
Mar. 19, 1996 |
| 5493182 |
Fluorescent lamp operating circuit, permitting dimming of the lamp |
Feb. 20, 1996 |
| 5493183 |
Open loop brightness control for EL lamp |
Feb. 20, 1996 |
| 5491388 |
Power regulator of discharge lamp and variable color illumination apparatus using the regulator |
Feb. 13, 1996 |
| 5491387 |
Discharge lamp lighting circuit for increasing electric power fed in initial lighting of the lamp |
Feb. 13, 1996 |
| 5486740 |
Lighting circuit for vehicular discharge lamp having DC/AC converter |
Jan. 23, 1996 |
| 5485059 |
Lighting circuit for vehicular discharge lamp |
Jan. 16, 1996 |
| 5481163 |
Discharge lamp current controlling circuit |
Jan. 2, 1996 |
| 5475285 |
Lamp circuit limited to a booster in which the power output decreases with increasing frequency |
Dec. 12, 1995 |
| 5465029 |
Power control apparatus for discharging lamp and method thereof |
Nov. 7, 1995 |
| 5449981 |
Electronic ballast and power controller |
Sep. 12, 1995 |
| 5449973 |
Lighting circuit for vehicular discharge lamp |
Sep. 12, 1995 |
| 5448139 |
Discharge lamp power control circuit with reduced light fluctuations during lamp run-up |
Sep. 5, 1995 |
| 5448138 |
Aeronautical obstruction light |
Sep. 5, 1995 |
| 5444336 |
An inverter driven lamp arrangement having a current detection circuitry coupled to a resonant output circuit |
Aug. 22, 1995 |
| 5440208 |
Driver circuit for electroluminescent panel |
Aug. 8, 1995 |
| 5438242 |
Apparatus for controlling the brightness of a magnetron-excited lamp |
Aug. 1, 1995 |
| 5434474 |
Lighting apparatus for discharge lamp |
Jul. 18, 1995 |
| 5428265 |
Processor controlled fluorescent lamp dimmer for aircraft liquid crystal display instruments |
Jun. 27, 1995 |
| 5426350 |
High frequency transformerless electronics ballast using double inductor-capacitor resonant power conversion for gas discharge lamps |
Jun. 20, 1995 |
| 5422548 |
Cut-off vehicular discharge lamp circuit having wait and monitor modes |
Jun. 6, 1995 |
| 5418435 |
Light controller with overload current protection circuit |
May. 23, 1995 |
| 5416387 |
Single stage, high power factor, gas discharge lamp ballast |
May. 16, 1995 |
| 5410221 |
Lamp ballast with frequency modulated lamp frequency |
Apr. 25, 1995 |
| 5404082 |
High frequency inverter with power-line-controlled frequency modulation |
Apr. 4, 1995 |
| 5396154 |
Stabilizer circuit having means for adjusting the light of the lamps |
Mar. 7, 1995 |
| 5391966 |
Starting and operating circuit for ARC discharge lamp |
Feb. 21, 1995 |
| 5382878 |
Auto-starting system for an electrodeless high intensity discharge lamp |
Jan. 17, 1995 |
| 5381076 |
Metal halide electronic ballast |
Jan. 10, 1995 |
| 5381074 |
Self calibrating lighting control system |
Jan. 10, 1995 |
| 5371439 |
Electronic ballast with lamp power regulation and brownout accommodation |
Dec. 6, 1994 |
| 5371443 |
Electronic ballast of the high power factor-constant power type |
Dec. 6, 1994 |
| 5371444 |
Electronic ballast power supply for gas discharge lamp including booster start circuit responsive to power up condition |
Dec. 6, 1994 |
| 5365149 |
Apparatus and method for producing a frequency based visual effect |
Nov. 15, 1994 |
| 5365152 |
Apparatus for controlling the power to a discharge-lamp |
Nov. 15, 1994 |
| 5315214 |
Dimmable high power factor high-efficiency electronic ballast controller integrated circuit with automatic ambient over-temperature shutdown |
May. 24, 1994 |
| 5268617 |
Power-supply apparatus for starting and operating a high-pressure gas discharge lamp |
Dec. 7, 1993 |
| 5241242 |
Power-supply circuit apparatus for high pressure gas discharge lamps in motor vehicles |
Aug. 31, 1993 |
| 5212428 |
Lighting circuit for vehicular discharge lamp |
May. 18, 1993 |
| 5204587 |
Fluorescent lamp power control |
Apr. 20, 1993 |
| 5192897 |
Electronic high frequency controlled device for operating gas discharge lamps |
Mar. 9, 1993 |
| 5191266 |
Circuit and method for controlling luminous intensity of discharge lamps |
Mar. 2, 1993 |
| 5162985 |
Measuring circuit for measuring instantaneous power across a non-reactive load |
Nov. 10, 1992 |
| 5151631 |
Lighting circuit for vehicular discharge lamp |
Sep. 29, 1992 |
| 5142203 |
Lighting circuit for high-pressure discharge lamp for vehicles |
Aug. 25, 1992 |
| 5140229 |
Lighting circuit for vehicular discharge lamp |
Aug. 18, 1992 |
| 5138232 |
Power supply device for thermionic emitting cathode |
Aug. 11, 1992 |
| 5128592 |
High frequency ballast for gaseous discharge lamps |
Jul. 7, 1992 |
| 5111118 |
Fluorescent lamp controllers |
May. 5, 1992 |
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