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:
Jan. 05, 2016
Filed:
Dec. 26, 2012
Shenzhen China Star Optoelectronics Technology Co., Ltd, Shenzhen, CN;
Anle Hu, Shenzhen, CN;
Xiang Yang, Shenzhen, CN;
Other;
Abstract
A light emitting diode (LED) backlight driver circuit includes an LED lightbar and a driver module of the LED lightbar. The driver module includes a backlight driver integrated chip (IC) regulating an output voltage of the driver module, and the backlight driver IC includes a first comparator correcting the output voltage of the driver module. The output end of each LED lightbar is coupled to an inverting input end of the first comparator, and a non-inverting input end of the first comparator is coupled to a protection module. The protection module includes a detection unit detecting an output current of the driver module. When the output current of the driver module detected by the detection unit is greater than a preset first current, the protection module outputs a first reference voltage to the non-inverting input end of the first comparator. When the output current of the driver module detected by the detection unit is lower than the preset first current, the protection module outputs a second reference voltage, which is lower than the first reference voltage, to the non-inverting input end of the first comparator.