发明授权
- 专利标题: Liquid crystal device, electronic apparatus and position identification method for identifying a position of an object
- 专利标题(中): 用于识别物体的位置的液晶装置,电子设备和位置识别方法
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申请号: US12037590申请日: 2008-02-26
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公开(公告)号: US08599146B2公开(公告)日: 2013-12-03
- 发明人: Sumio Utsunomiya , Takeshi Koshihara
- 申请人: Sumio Utsunomiya , Takeshi Koshihara
- 申请人地址: JP Aichi-Ken
- 专利权人: Japan Display West Inc.
- 当前专利权人: Japan Display West Inc.
- 当前专利权人地址: JP Aichi-Ken
- 代理机构: K&L Gates LLP
- 优先权: JP2007-062980 20070313
- 主分类号: G06F3/041
- IPC分类号: G06F3/041
摘要:
A liquid crystal device includes a liquid crystal panel, a plurality of detection electrodes, a switching circuit, and a position identification device. The liquid crystal panel is configured so that a liquid crystal is sealed in a gap between a first substrate and a second substrate, which are opposed to each other, and a voltage of an opposite electrode opposite the liquid crystal periodically varies. The plurality of detection electrodes are provided on a side opposite to a side on which the liquid crystal is provided via the first substrate, wherein an initial voltage is induced in each of the plurality of detection electrodes on the basis of a variation in voltage of the opposite electrode. The switching circuit sequentially connects each of the plurality of detection electrodes, in which the initial voltages are induced, to a detection portion. The position identification device generates a position signal that indicates a position of a pointing body on the basis of a detection signal produced in the detection portion.
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