发明名称 |
Optical touch circuit and liquid crystal display device using same |
摘要 |
In an exemplary optical touch circuit and a LCD device using the same, an optical sensing unit is turned on or off according to an irradiation light intensity and accordingly generates a first signal. A first signal readout unit is electrically coupled to the optical sensing unit and turned on or off according to a first operation timing sequence and accordingly outputs the first signal. A touch reference unit is for providing a reference voltage. A second signal readout unit is turned on or off according to a second operation timing sequence and accordingly outputs the reference voltage. The touch sensing unit is electrically coupled to the first and second signal readout units and uses a voltage difference between the first signal and the reference voltage as a basis to determine that whether the optical touch circuit is touched or not. |
申请公布号 |
US8730211(B2) |
申请公布日期 |
2014.05.20 |
申请号 |
US201213490628 |
申请日期 |
2012.06.07 |
申请人 |
CHENG YI-RU;HSU YA-LING;CHUNG YUEH-HUNG;HUANG HSUEH-YING;AU OPTRONICS CORP. |
发明人 |
CHENG YI-RU;HSU YA-LING;CHUNG YUEH-HUNG;HUANG HSUEH-YING |
分类号 |
G06F3/042 |
主分类号 |
G06F3/042 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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