发明授权
US08643592B2 Light sensing circuit, backlight control apparatus having the same, and liquid crystal display device having the same
有权
光感测电路，具有该光感测电路的背光控制装置和具有该光感测电路的液晶显示装置
- 专利标题： Light sensing circuit, backlight control apparatus having the same, and liquid crystal display device having the same
- 专利标题（中）： 光感测电路，具有该光感测电路的背光控制装置和具有该光感测电路的液晶显示装置
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申请号： US13104441申请日： 2011-05-10
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公开(公告)号： US08643592B2公开(公告)日： 2014-02-04
- 发明人: Jeong-Won Yoon , Su-Hwan Moon
- 申请人： Jeong-Won Yoon , Su-Hwan Moon
- 申请人地址： KR Seoul
- 专利权人： LG Display Co., Ltd.
- 当前专利权人： LG Display Co., Ltd.
- 当前专利权人地址： KR Seoul
- 代理机构： Brinks Gilson & Lione
- 优先权： KR2006-57131 20060623
- 主分类号： H01L31/0376
- IPC分类号： H01L31/0376
摘要：
A light sensing circuit capable of enhancing a reliability by lowering a dependency on a temperature change without using a resistor, a backlight control apparatus having the same, and an LCD device having the same. The light sensing circuit includes a first MOS-transistor; and a second MOS-transistor serially connected to the first MOS-transistor between a first power terminal and a ground terminal, in which a second power terminal is connected to each gate terminal of the first MOS-transistor and the second MOS-transistor, and an optical amount detecting terminal is connected to a common connection point between a drain terminal of the first MOS-transistor and a source terminal of the second MOS-transistor.
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