DA/AC convert for driving cold cathode fluorescent lamp

Details DA/AC convert for driving cold cathode fluorescent lamp DA/AC convert for driving cold cathode fluorescent lamp

2006-10-17

2010-11-02

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S2090PZ, C315S307000, C310S318000

Reexamination Certificate

active

07825605

ABSTRACT:
The present invention discloses a DC/AC converter in the backlight power supply system using cold cathode fluorescent lamp (CCFL). The DC/AC converter comprises a front end DC/DC converter, a full-bridge or half bridge inverter, and a piezoelectric transformer. Even with a wide range of input voltages, the front end DC/DC converter produces a predetermined DC voltage or a DC voltage with a predetermined small range and the cascaded inverter operates with a switching frequency close to the resonant frequency of the piezoelectric transformer, which helps the backlight power supply system achieve high efficiency.

REFERENCES:
patent: 5528192 (1996-06-01), Agiman
patent: 5615093 (1997-03-01), Nalbant
patent: 5619402 (1997-04-01), Liu
patent: 5705877 (1998-01-01), Shimada
patent: 5757173 (1998-05-01), Agiman
patent: 5892336 (1999-04-01), Lin et al.
patent: 5923129 (1999-07-01), Henry
patent: 5930121 (1999-07-01), Henry
patent: 6013969 (2000-01-01), Noma et al.
patent: 6104146 (2000-08-01), Chou et al.
patent: 6198234 (2001-03-01), Henry
patent: 6198245 (2001-03-01), Du et al.
patent: 6259615 (2001-07-01), Lin
patent: 6307765 (2001-10-01), Choi
patent: 6396722 (2002-05-01), Lin
patent: 6459602 (2002-10-01), Lipcsei
patent: 6469922 (2002-10-01), Choi
patent: 6501234 (2002-12-01), Lin et al.
patent: 6507173 (2003-01-01), Spiridon et al.
patent: 6515881 (2003-02-01), Chou et al.
patent: 6531831 (2003-03-01), Chou et al.
patent: 6559606 (2003-05-01), Chou et al.
patent: 6570344 (2003-05-01), Lin
patent: 6654268 (2003-11-01), Choi
patent: 6657274 (2003-12-01), Comeau et al.
patent: 6720705 (2004-04-01), Nakatsuka et al.
patent: 6756769 (2004-06-01), Bucur et al.
patent: 6781325 (2004-08-01), Lee et al.
patent: 6809938 (2004-10-01), Lin et al.
patent: 6853047 (2005-02-01), Comeau et al.
patent: 6856519 (2005-02-01), Lin et al.
patent: 6864669 (2005-03-01), Bucur
patent: 6870330 (2005-03-01), Choi
patent: 6873322 (2005-03-01), Hartular
patent: 6876157 (2005-04-01), Henry
patent: 6888338 (2005-05-01), Popescu-Stanesti et al.
patent: 6897698 (2005-05-01), Gheorghiu et al.
patent: 6900993 (2005-05-01), Lin et al.
patent: 6906497 (2005-06-01), Bucur et al.
patent: 6911786 (2005-06-01), Qiu
patent: 6936975 (2005-08-01), Lin et al.
patent: 6946806 (2005-09-01), Choi
patent: 6979959 (2005-12-01), Henry
patent: 6999328 (2006-02-01), Lin
patent: 7023709 (2006-04-01), Lipcsei et al.
patent: 7057611 (2006-06-01), Lin et al.
patent: 7061183 (2006-06-01), Ball
patent: 7075245 (2006-07-01), Liu
patent: 7095392 (2006-08-01), Lin
patent: 7112929 (2006-09-01), Chiou
patent: 7112943 (2006-09-01), Bucur et al.
patent: 7120035 (2006-10-01), Lin et al.
patent: 7126289 (2006-10-01), Lin et al.
patent: 7141933 (2006-11-01), Ball
patent: 7157886 (2007-01-01), Agarwal et al.
patent: 7161309 (2007-01-01), Chiou et al.
patent: 7173382 (2007-02-01), Ball
patent: 7183724 (2007-02-01), Ball
patent: 7183727 (2007-02-01), Ferguson et al.
patent: 7187139 (2007-03-01), Jin
patent: 7187140 (2007-03-01), Ball
patent: 7190123 (2007-03-01), Lee et al.
patent: 7200017 (2007-04-01), Lin
patent: 2002/0180380 (2002-12-01), Lin
patent: 2005/0030776 (2005-02-01), Lin
patent: 2005/0093471 (2005-05-01), Jin
patent: 2005/0093482 (2005-05-01), Ball
patent: 2005/0093484 (2005-05-01), Ball
patent: 2005/0151716 (2005-07-01), Lin
patent: 2005/0174818 (2005-08-01), Lin et al.
patent: 2005/0225261 (2005-10-01), Jin
patent: 2006/0202635 (2006-09-01), Liu
patent: 2006/0232222 (2006-10-01), Liu et al.
patent: 2006/0279521 (2006-12-01), Lin
patent: 2007/0001627 (2007-01-01), Lin et al.
patent: 2007/0046217 (2007-03-01), Liu
patent: 2007/0047276 (2007-03-01), Lin et al.
patent: 2007/0085493 (2007-04-01), Kuo et al.
patent: 2008/0136343 (2008-06-01), Yu et al.
Fukunaga, H., H. Kakehashi, H. Ogasawara, Y. Ohta, “Effect of Dimension on Characteristics of Rosen-Type Piezoelectric Transformer”, IEEE PESC'98, pp. 1504-1510.
Zhou, Jinghai, Fengfeng Tao, Fred C. Lee, “Inductor-Less Charge Pump PFC Electronic Ballast”, 2001 IEEE Industry Application Conference, pp. 524-529.
Sanz, M., P. Alou, R. Prieto, J.A. Cobos, and J.Uceda, “Comparison of Different Alternatives to Drive Piezoelectric Transformers”, IEEE APEC'02, pp. 358-364.
Lin, Ray-Lee , “Piezoelectric Transformer Characterization and Application of Electronic Ballast”, VT Ph.D thesis, Nov. 2001, 16 pages.
Kakehashi, Hidenori, Takayuki Hidaka, Tamotsu Ninomiya, Masahito Shoyama, Hiroshi Ogasawara, Yukihiko Ohta, “Electronic Ballast Using Piezoelectric Transformers for Fluorescent Lamps,” Proceedings of IEEE PESC'98, pp. 29-35.

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