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Class Information
Number: 315/278
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply > Transformer in the supply circuit > Three or more coil-type transformers
Description: Systems wherein the transformer is of the type having three or more coils or windings.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7557514 |
Inverter driving circuit |
Jul. 7, 2009 |
| 7492106 |
Inverter circuit, backlight assembly, liquid crystal display having the same, and method thereof |
Feb. 17, 2009 |
| 7477023 |
Inverter circuit and backlight assembly having the same |
Jan. 13, 2009 |
| 7449843 |
Transformer for driving multi-lamp and backlight module thereof |
Nov. 11, 2008 |
| 7436124 |
Voltage fed inverter for fluorescent lamps |
Oct. 14, 2008 |
| 7402957 |
Inverter circuit, backlight assembly, and liquid crystal display with backlight assembly |
Jul. 22, 2008 |
| 7402959 |
Phase sampling protection device |
Jul. 22, 2008 |
| 7385358 |
Power supply circuit and transformer thereof |
Jun. 10, 2008 |
| 7365501 |
Inverter transformer |
Apr. 29, 2008 |
| 7315130 |
Switching control for inverter startup and shutdown |
Jan. 1, 2008 |
| 7294973 |
Discharge tube lighting apparatus, light source apparatus, and display apparatus |
Nov. 13, 2007 |
| 7274156 |
Power supply circuit and transformer thereof |
Sep. 25, 2007 |
| 7242151 |
Multiple lamp balance transformer and drive circuit |
Jul. 10, 2007 |
| 7239092 |
Limited open circuit voltage ballast |
Jul. 3, 2007 |
| 7180249 |
Switching element driving circuit and discharge lamp lighting apparatus |
Feb. 20, 2007 |
| 7161307 |
Power factor correction apparatus with embedded DC--DC converter |
Jan. 9, 2007 |
| 7154233 |
Converter circuit with coupled inductances having asymmetrical air gap arrangement |
Dec. 26, 2006 |
| 7075249 |
Arrangement in connection with a coupling device of a fluorescent lamp |
Jul. 11, 2006 |
| 7049765 |
Transformer for dimmer switch or on/off switch and method of use |
May. 23, 2006 |
| 7045970 |
Electronic ballast for a lamp to be operated with iterative voltage pulses |
May. 16, 2006 |
| 7019467 |
Thermally-protected ballast for high-intensity-discharge lamps |
Mar. 28, 2006 |
| 6940233 |
Method and system of driving a CCFL |
Sep. 6, 2005 |
| 6936977 |
Ballast circuit having enhanced output isolation transformer circuit with high power factor |
Aug. 30, 2005 |
| 6888320 |
Switching power supply for discharge lamp and method for powering a lamp |
May. 3, 2005 |
| 6812652 |
Constant current regulator for airport lighting |
Nov. 2, 2004 |
| 6642672 |
Integrated filter with common-mode and differential-mode functions |
Nov. 4, 2003 |
| 6597130 |
Driving apparatus of discharge tube lamp |
Jul. 22, 2003 |
| 6583574 |
Power saver for discharge lamps |
Jun. 24, 2003 |
| 6570345 |
Constant current regulator for airport lighting |
May. 27, 2003 |
| 6433492 |
Magnetically shielded electrodeless light source |
Aug. 13, 2002 |
| 6376989 |
Dimmable discharge lamp for dielectrically impeded discharges |
Apr. 23, 2002 |
| 6369525 |
White light-emitting-diode lamp driver based on multiple output converter with output current mode control |
Apr. 9, 2002 |
| 6362577 |
Discharge lamp lighting circuit |
Mar. 26, 2002 |
| 6316883 |
Power-factor correction circuit of electronic ballast for fluorescent lamps |
Nov. 13, 2001 |
| 6246183 |
Dimmable electrodeless light source |
Jun. 12, 2001 |
| 6239557 |
Transformer winding technique with reduced parasitic capacitance effects |
May. 29, 2001 |
| 6229270 |
Variable high frequency lamp controllers and systems |
May. 8, 2001 |
| 6215256 |
High-efficient electronic stabilizer with single stage conversion |
Apr. 10, 2001 |
| 6194844 |
Circuit arrangement and method for operating at least one high-pressure discharge lamp |
Feb. 27, 2001 |
| 6160357 |
Bridge commutator with separate drive oscillator for electrodeless lamps |
Dec. 12, 2000 |
| 6114815 |
Device and process for lighting discharge lamp |
Sep. 5, 2000 |
| 6091206 |
Electronic ballast system for fluorescent lamps |
Jul. 18, 2000 |
| 6040662 |
Fluorescent lamp inverter apparatus |
Mar. 21, 2000 |
| 5990633 |
High-pressure discharge lamp having decoupled ignition and load circuits |
Nov. 23, 1999 |
| 5945785 |
Power source device with minimized variation in circuit efficiency due to variation in applied voltage to driving transformer |
Aug. 31, 1999 |
| 5900700 |
Process and circuit arrangement for operating cold cathode discharge lamps |
May. 4, 1999 |
| 5898278 |
Series resonant lamp circuit having direct electrode connection between rectifier and AC source |
Apr. 27, 1999 |
| 5889373 |
Fluorescent lamp ballast with current feedback using a dual-function magnetic device |
Mar. 30, 1999 |
| RE35994 |
Variable control, current sensing ballast |
Dec. 15, 1998 |
| 5847518 |
High voltage transformer with secondary coil windings on opposing bobbins |
Dec. 8, 1998 |
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