Invention Grant
US09001109B2 LED backlight driving circuit, backlight module, and LCD device
有权
LED背光驱动电路,背光模组和LCD装置
- Patent Title: LED backlight driving circuit, backlight module, and LCD device
- Patent Title (中): LED背光驱动电路,背光模组和LCD装置
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Application No.: US13583928Application Date: 2012-07-09
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Publication No.: US09001109B2Publication Date: 2015-04-07
- Inventor: Fei Li , Xinming Gao , Xiang Yang
- Applicant: Fei Li , Xinming Gao , Xiang Yang
- Applicant Address: CN Shenzhen
- Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Current Assignee Address: CN Shenzhen
- Agency: IPro, Inc.
- Agent Na Xu
- International Application: PCT/CN2012/078366 WO 20120709
- International Announcement: WO2014/005340 WO 20140109
- Main IPC: G09G5/00
- IPC: G09G5/00 ; G09G3/34 ; H05B33/08

Abstract:
The present disclosure discloses a light emitting diode (LED) backlight driving circuit, a backlight module, and a liquid crystal display (LCD) device. The LED backlight driving circuit includes an LED lightbars. An output end of the LED lightbar is connected with a control integrated circuit (IC) in series, and is also connected with a shunt controllable switch. The shunt controllable switch is switched on when a voltage of the output end of the LED lightbar exceeds a preset value and is switched off when the voltage is less than the preset value. In the present disclosure, because a shunt controllable switch is connected in parallel in the control IC, when the LED lightbars are short-circuited, the shunt controllable switch is switched on, a part of current flows towards the shunt controllable switch, and the burden of the control IC is alleviated. Thus, the temperature of the control IC is reduced.
Public/Granted literature
- US20140009455A1 LED BACKLIGHT DRIVING CIRCUIT, BACKLIGHT MODULE, AND LCD DEVICE Public/Granted day:2014-01-09
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