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Class Information
Number: 315/210
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Plural load device systems
Description: Systems having two or more load devices in the system.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7573729 |
Resonant power LED control circuit with brightness and color control |
Aug. 11, 2009 |
| 7541749 |
Current-mode resonant inverter circuit for discharge lamp |
Jun. 2, 2009 |
| 7489086 |
AC light emitting diode and AC LED drive methods and apparatus |
Feb. 10, 2009 |
| 7285924 |
Driving circuit for LCD backlight lamps |
Oct. 23, 2007 |
| 7250726 |
Systems and methods for a transformer configuration with a tree topology for current balancing in gas discharge lamps |
Jul. 31, 2007 |
| 7183722 |
Apparatus and method of driving lamp of liquid crystal display device |
Feb. 27, 2007 |
| 6954008 |
Integrated power supply apparatus for information appliances |
Oct. 11, 2005 |
| 6455997 |
Deflection yoke having magnets on the top and bottom of the flange portion of the holder |
Sep. 24, 2002 |
| 6361185 |
Safety structure to prevent a socket from being over-heated in a lamp string |
Mar. 26, 2002 |
| 6163113 |
Protecting device for a string of series connected lamps |
Dec. 19, 2000 |
| 5811892 |
Power supply system including mechanical output switches for use with a plurality of display tubes |
Sep. 22, 1998 |
| 5783910 |
Flat panel display in which low-voltage row and column address signals control a much higher pixel activation voltage |
Jul. 21, 1998 |
| 5742130 |
Intelligent lamp or intelligent contact terminal for a lamp |
Apr. 21, 1998 |
| 5616991 |
Flat panel display in which low-voltage row and column address signals control a much higher pixel activation voltage |
Apr. 1, 1997 |
| 5592051 |
Intelligent lamp or intelligent contact terminal for a lamp |
Jan. 7, 1997 |
| 5481160 |
Electronic ballast with FET bridge inverter |
Jan. 2, 1996 |
| 5434476 |
Circuitry for operating fluorescent lamps with no stroboscopic effects |
Jul. 18, 1995 |
| 5317238 |
Electromagnetic field sensitive animated ornamental display |
May. 31, 1994 |
| 5268616 |
Vehicle instrument panel lamps, improved pulse width dimmer system therefor |
Dec. 7, 1993 |
| 5220247 |
Circuit for driving a gas discharge lamp load |
Jun. 15, 1993 |
| 5210470 |
Low power on-off control of electronic ballast |
May. 11, 1993 |
| 5192895 |
Synchronously-controlled light string |
Mar. 9, 1993 |
| 5180952 |
Electronic track lighting system |
Jan. 19, 1993 |
| 5159245 |
Track lighting system for 277 volt power line |
Oct. 27, 1992 |
| 5140225 |
High frequency lamp transformer for linear lighting fixture |
Aug. 18, 1992 |
| 5138233 |
Driver circuit for a plurality of gas discharge lamps |
Aug. 11, 1992 |
| 5111113 |
Music initiated Christmas light set controller |
May. 5, 1992 |
| 5072154 |
Automatic luminosity control device for car and motor bicycle headlamps |
Dec. 10, 1991 |
| 5070276 |
Lamp supply circuit |
Dec. 3, 1991 |
| 5047696 |
Power-limited ceiling lighting system |
Sep. 10, 1991 |
| 5008595 |
Ornamental light display apparatus |
Apr. 16, 1991 |
| 4992705 |
Fluorescent lighting system |
Feb. 12, 1991 |
| 4937502 |
Electronic ballast |
Jun. 26, 1990 |
| 4906901 |
Power supply for outdoor lighting systems using high frequency |
Mar. 6, 1990 |
| 4888525 |
Sun tanning apparatus having electronic operating system |
Dec. 19, 1989 |
| 4804916 |
Input voltage compensated, microprocessor controlled, power regulator |
Feb. 14, 1989 |
| 4798998 |
Electronically dimmed power limited lighting system |
Jan. 17, 1989 |
| 4710682 |
Fluorescent lamp operating circuit |
Dec. 1, 1987 |
| 4704561 |
Push-pull generator |
Nov. 3, 1987 |
| 4684851 |
DC/AC converter for feeding a metal vapor discharge tube |
Aug. 4, 1987 |
| 4667133 |
Power-limited lighting system |
May. 19, 1987 |
| 4641061 |
Solid state ballast for gaseous discharge lamps |
Feb. 3, 1987 |
| 4626747 |
Class-3 lighting system |
Dec. 2, 1986 |
| 4591764 |
Plug-in auxiliary tracks for track lighting systems |
May. 27, 1986 |
| 4588924 |
High efficiency converter for discharge lamps |
May. 13, 1986 |
| 4525648 |
DC/AC Converter with voltage dependent timing circuit for discharge lamps |
Jun. 25, 1985 |
| 4508997 |
Lighting control system |
Apr. 2, 1985 |
| 4503362 |
Frequency stabilized, gain controlled ballast system |
Mar. 5, 1985 |
| 4498031 |
Variable frequency current control device for discharge lamps |
Feb. 5, 1985 |
| 4449073 |
Runway approach lighting system with fault monitor |
May. 15, 1984 |
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