发明授权
US08269751B2 Photo element and driving method thereof and liquid crystal display
有权
照片元件及其驱动方法和液晶显示器
- 专利标题： Photo element and driving method thereof and liquid crystal display
- 专利标题（中）： 照片元件及其驱动方法和液晶显示器
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申请号： US12626669申请日： 2009-11-26
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公开(公告)号： US08269751B2公开(公告)日： 2012-09-18
- 发明人: Ting-Chung Liu , Po-Yang Chen , Hsien-Tang Hu , Chien-Chih Hsiau
- 申请人： Ting-Chung Liu , Po-Yang Chen , Hsien-Tang Hu , Chien-Chih Hsiau
- 申请人地址： TW Taipei
- 专利权人： Hannstar Display Corp.
- 当前专利权人： Hannstar Display Corp.
- 当前专利权人地址： TW Taipei
- 代理机构： Huffman Law Group, P.C.
- 优先权： TW98109166A 20090320
- 主分类号： G06F3/042
- IPC分类号： G06F3/042
摘要：
A photo element includes a photo thin film transistor (TFT), a switch thin film transistor, and a compensation thin film transistor. A bias line provides a bias voltage to the photo TFT. The photo TFT generates a photo-induced current under an illuminated environment. A first switch line provides a voltage to open the switch TFT, and thus the photo-induced current is read out through a readout line. A second switch line provides compensation current to open the compensation TFT. The compensation current applies a reverse-biased stress to the photo TFT; therefore the threshold voltage and sensitivity of the photo TFT can be maintained.
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