Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Reexamination Certificate
2005-03-08
2005-03-08
Lee, Wilson (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
C315S2090SC, C315S291000, C315S307000
Reexamination Certificate
active
06864642
ABSTRACT:
A fluorescent lamp electronic ballast includes a DC to DC flyback converter, a commutator circuit, and a current sensor. The flyback converter includes a flyback transformer connected to a diode/capacitor combination, and includes a switch used to produce a flyback waveform that is rectified by the diode and results in a high voltage DC output at the capacitor. The commutator circuit receives the high voltage DC output and converts the high voltage DC output to an AC signal for operating the fluorescent lamp. The current sensor senses a DC lamp current from the output of the flyback converter and provides a current sense signal to the flyback converter. The flyback converter switch is controlled based on the current sense signal. Preferred ballasts advantageously provide a continuously dimmable lamp load, a universal type ballast for a wide range of lamp loads and combinations, and programmed start.
REFERENCES:
patent: 3700960 (1972-10-01), Lake
patent: 3967159 (1976-06-01), Dendy et al.
patent: 3969652 (1976-07-01), Herzog
patent: 3991344 (1976-11-01), Tabor
patent: 3999100 (1976-12-01), Dendy et al.
patent: 4004188 (1977-01-01), Cooper
patent: 4184197 (1980-01-01), Cuk et al.
patent: 4240009 (1980-12-01), Paul
patent: 4251752 (1981-02-01), Stolz
patent: 4277726 (1981-07-01), Burke
patent: 4358716 (1982-11-01), Cordes et al.
patent: 4388563 (1983-06-01), Hyltin
patent: 4392085 (1983-07-01), Knoll et al.
patent: 4412154 (1983-10-01), Klein
patent: 4415839 (1983-11-01), Lesea
patent: 4464606 (1984-08-01), Kane
patent: 4469988 (1984-09-01), Cronin
patent: 4477748 (1984-10-01), Grubbs
patent: 4485434 (1984-11-01), Beeston et al.
patent: 4504775 (1985-03-01), Becker
patent: 4523128 (1985-06-01), Stamm et al.
patent: 4672522 (1987-06-01), Lesea
patent: 4700113 (1987-10-01), Stupp et al.
patent: 4723098 (1988-02-01), Grubbs
patent: 4724360 (1988-02-01), Luursema
patent: 4870327 (1989-09-01), Jorgensen
patent: 4873616 (1989-10-01), Fredrick et al.
patent: 4873617 (1989-10-01), Fredrick et al.
patent: 4949015 (1990-08-01), Nilssen
patent: 4958108 (1990-09-01), Jorgensen
patent: 5363020 (1994-11-01), Chen et al.
patent: 5416387 (1995-05-01), Cuk et al.
patent: 5428268 (1995-06-01), Melis et al.
patent: 5449981 (1995-09-01), Auld, Jr. et al.
patent: 5483127 (1996-01-01), Widmayer et al.
patent: 5698952 (1997-12-01), Stebbins
patent: 5814976 (1998-09-01), Allison
patent: 5969484 (1999-10-01), Santi et al.
patent: 6680582 (2004-01-01), Cammack
patent: 20020113559 (2002-08-01), Lam
patent: 20020135320 (2002-09-01), Kominami et al.
patent: 20020153849 (2002-10-01), Ribarich
patent: 20030222713 (2003-12-01), Kominani et al.
Mammano, Robert, Switching Power Supply Topology Voltage Mode vs. Current Mode, UNITRODE Design Note, DN-62, 10/94, pp. 1-4.
UNITRODE Advanced Regulating Pulse Width Modulator SLUS181A-Nov. 1999, pp. 1-7.
UNITRODE Current Mode PWM Controller, 4/97 pp. 1-8.
UNITRODE Regulating Pulse Width Modulators, 2/96, pp. 1-8.
UNITRODE Application Note U-112, A High Precision PWM Transconductance Amplifier for Microstepping Using Unitrode's UC3637, pp. 3-124-3-132.
UNITRODE Application Note U-102, UC1637/2637/3637 Switched Mode Controller for DC Motor Drive, pp. 3-67-3-78.
Unitrode Products from Texas Instruments, Advanced PWM Motor Controller, SLUS290A-Jan. 1998, Revised Jan. 2003, pp. 1-9.
UNITRODE Application Note U-100A, UC3842/3/4/5 Provides Low-Cost Current-Mode Control, pp. 3-53-3-66.
Zendzian Dave, Class-D Audio Amplifier, Unitrode, pp. 1-7.
Constant Current/Constant Power Regulation Circuits for TOPSwitch® Design Note DN-14, Jun. 1996, pp. 1-16.
TOP242-250 TOPSwitch®-GX Family, Extended Power, Design Flexible, EcoSmart®, Integrated Off-Line Switcher, Sep. 2002, pp. 1-52.
TOP232-234 TOPSWITCH®-FX Family, Design Flexible, EcoSmart®, Integrated Off-Line Switcher, Power Integrations, Inc., Jan. 2000pp. 1-36.
Nemirow Arthur T.
Sears Storm S
Brooks & Kushman P.C.
Bruce Industries, Inc.
Lee Wilson
Vu Jimmy T
LandOfFree
Electronic ballast with DC output flyback converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic ballast with DC output flyback converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic ballast with DC output flyback converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3443310