LED Backlight Driving Circuit and Display Device,申请号US201113381366-传众专利搜索

LED Backlight Driving Circuit and Display Device

申请公布号：US2013107165(A1)

申请号：US201113381366

申请日期：2011.11.03

申请公布日期：2013.05.02

申请人：

LIN PO-SHEN;LIAO LIANG-CHAN;GAO XIN-MING;SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO. LTD.

发明人：LIN PO-SHEN;LIAO LIANG-CHAN;GAO XIN-MING

分类号：G02F1/13357;H05B37/00

主分类号：G02F1/13357

摘要：The present invention provides a display device and an LED backlight driving circuit thereof. The LED backlight driving circuit includes a plurality of LED light strings connected in parallel; a switch module including switches; a power module, and a switching control module. The switching control module includes: a driving unit connected to the switches; a current detection unit connected to the switches; an ON time detection unit connected to the driving unit; a reference unit, the reference unit supplying a reference value; multipliers, each of which has two input terminals respectively connected to the ON time detection unit and the current detection unit to receive a ON time value of a corresponding one of the switches and a voltage signal indicating the current of the switch; and comparison units, each of which has two input terminals respectively connected to the reference unit and an output terminal of a corresponding one of the multipliers. Each of the comparison units has an output terminal connected to the driving unit. The driving unit controls the ON time of the switch corresponding to the comparison unit according to an output result of the comparison unit.