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:
Nov. 08, 2011
Filed:
Nov. 15, 2006
Xiaojun Wang, Shenzhen, CN;
Sheng-tai Lee, Taipei, TW;
Youling LI, Shenzhen, CN;
Da Liu, Milpitas, CA (US);
RU Guo, Santa Clara, CA (US);
Xiaojun Wang, Shenzhen, CN;
Sheng-Tai Lee, Taipei, TW;
Youling Li, Shenzhen, CN;
Da Liu, Milpitas, CA (US);
Ru Guo, Santa Clara, CA (US);
O2Micro Inc, Santa Clara, CA (US);
Abstract
A circuit structure for LCD backlight is disclosed in the present invention. The circuit structure includes an inverter topology, a current balance circuit, and a plurality of loads. The current balance circuit is coupled to the plurality of loads and capable of balancing current of N loads by using N/2−1 balance chokes. The circuit structure may further include a protection circuit which is coupled to the low voltage sides of the plurality of loads. The protection circuit is capable of sensing lamp voltages and providing a feedback signal to a controller. Furthermore, the protection circuit is composed of count-reduced and cost-competitive electronic elements.