发明名称 |
Light sensing circuit, liquid crystal display having the same, and method of driving the same using detected external light, internal light, and peripheral light |
摘要 |
A light sensing circuit includes a sensor unit, a voltage generator and a readout circuit. The sensor unit includes a first sensor that detects an external light to output a first current value, a third sensor that detects an internal light generated from the backlight unit to output a third current value, and a second sensor that detects a peripheral light isolated from the external light and the internal light to output a second current value. The sensor unit outputs a first differential value between the third current value and the second current value and a second differential value between the first current value and the second current value. The voltage generator generates a reference voltage based on the first differential value and a sensing voltage based on the second differential value. The readout circuit outputs brightness information of the external light using the reference voltage and the sensing voltage. |
申请公布号 |
US8174486(B2) |
申请公布日期 |
2012.05.08 |
申请号 |
US20090357874 |
申请日期 |
2009.01.22 |
申请人 |
WOO DOO-HYUNG;SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
WOO DOO-HYUNG |
分类号 |
G09G3/36 |
主分类号 |
G09G3/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|