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:
Jun. 22, 2010
Filed:
Mar. 24, 2008
Yen-chen Huang, Hsin-Chu, TW;
Chia-hung Sun, Hsin-Chu, TW;
Huang-ti Lin, Hsin-Chu, TW;
Yuan-pin Cho, Hsin-Chu, TW;
Yen-Chen Huang, Hsin-Chu, TW;
Chia-Hung Sun, Hsin-Chu, TW;
Huang-Ti Lin, Hsin-Chu, TW;
Yuan-Pin Cho, Hsin-Chu, TW;
AU Optronics Corp., Hsin-Chu, TW;
Abstract
A lamp current balance and feedback system and related method are disclosed for balancing the input and output currents of a lamp by making use of a lamp current balance and feedback mechanism. The operation of the lamp current balance and feedback mechanism includes coupling the input current of the lamp for generating a first balance current by a first transformer, coupling the output current of the lamp for generating a second balance current by a second transformer, coupling the first and second transformers for substantially equalizing the first and second balance currents, generating a feedback signal based on the first or second balance current by a feedback circuit, generating a pulse width modulation signal based on the feedback signal by a pulse width modulation signal generation circuit, and driving the input and output currents of the lamp based on the pulse width modulation signal by a driving circuit.