The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2007
Filed:
Mar. 15, 2005
Chin-der Wey, Houlong Township, Miaoli County, TW;
Chia-hung Sun, Kaohsiung, TW;
Hsien-jen LI, Hemei Township, Changhua County, TW;
Yi-chun Yen, Sanchong, TW;
Chin-Der Wey, Houlong Township, Miaoli County, TW;
Chia-Hung Sun, Kaohsiung, TW;
Hsien-Jen Li, Hemei Township, Changhua County, TW;
Yi-Chun Yen, Sanchong, TW;
AU Optronics Corp., Hsin-Chu, TW;
Abstract
A lamp driving device for driving a lamp. A feedback circuit includes a voltage falling unit and a rectification circuit. The voltage falling unit provides a low voltage signal in response to a first DC power signal, a first AC power signal or a first driving power signal. The rectification circuit rectifies the low voltage signal to generate a feedback signal. The rectification circuit provides the feedback signal. A controller provides a control signal in response to the feedback signal. A first DC-to-AC converter transforms the first DC power signal to the first AC power signal in response to the control signal. A first voltage raising unit raises the voltage of the first AC power signal to generate the first driving power signal. The first raising unit provides the first driving power signal to a first end of the lamp, so that the lamp achieves the desired brightness stably.