发明授权
- 专利标题： Optical touch screen system and sensing method for the same
- 专利标题（中）： 光触摸屏系统和感应方式相同
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申请号： US13253105申请日： 2011-10-05
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公开(公告)号： US09052780B2公开(公告)日： 2015-06-09
- 发明人: Chih Hung Lu , Tzung Min Su , Chih Hsin Lin , Hsin Chia Chen , Cheng Nan Tsai
- 申请人： Chih Hung Lu , Tzung Min Su , Chih Hsin Lin , Hsin Chia Chen , Cheng Nan Tsai
- 申请人地址： TW Hsin-Chu
- 专利权人： Pixart Imaging Inc.
- 当前专利权人： Pixart Imaging Inc.
- 当前专利权人地址： TW Hsin-Chu
- 代理机构： Bacon & Thomas PLLC
- 代理商 Juan Carlos A. Marquez
- 优先权： TW099135672A 20101020
- 主分类号： G06F3/042
- IPC分类号： G06F3/042 ; G06F3/041
摘要：
An optical touch screen system includes a touch screen, an image-sensing device, and a processing device. The image-sensing device generates a plurality of light-shielding information of an object at a plurality of time points. The processing device coupled to the image-sensing device includes a computing unit calculating a projected size difference value according to the plurality of light-shielding information, wherein the projected size difference value is a difference value between the projected sizes of the object on the touch screen at two different time points.