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:
Dec. 13, 2011
Filed:
Jul. 02, 2009
Shih-meng Chang, Taipei County, TW;
Chia-lin Liu, Taichung County, TW;
Chi-neng MO, Taoyuan County, TW;
Ke-horng Chen, Taipei County, TW;
Chi-lin Chen, Taipei County, TW;
Shih-Meng Chang, Taipei County, TW;
Chia-Lin Liu, Taichung County, TW;
Chi-Neng Mo, Taoyuan County, TW;
Ke-Horng Chen, Taipei County, TW;
Chi-Lin Chen, Taipei County, TW;
Chunghwa Picture Tubes, Ltd., Taoyuan, TW;
Abstract
A driving circuit of a backlight module is provided. The driving circuit has a dimming unit used for transmitting signals, wherein the dimming unit can adjust a current flowing through a light-emitting diode (LED) according a pulse width modulation signal and an enable signal, so as to adjust a light-emitting intensity of the LED. In the present invention, fewer devices are used to implement the dimming unit, and a transmission gate is replaced by a N-type transistor and a P-type transistor, such that a chip area and a circuit cost of the driving circuit are reduced.