发明授权
- 专利标题： Coordinate-position detecting device and a method for detecting the coordinate-position
- 专利标题（中）： 坐标位置检测装置和检测坐标位置的方法
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申请号： US09349513申请日： 1999-07-09
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公开(公告)号： US06285359B1公开(公告)日： 2001-09-04
- 发明人: Tsutomu Ogasawara , Kenichi Takekawa , Takahiro Ito
- 申请人： Tsutomu Ogasawara , Kenichi Takekawa , Takahiro Ito
- 优先权： JP11-027775 19990204
- 主分类号： G09G500
- IPC分类号： G09G500
摘要：
A coordinate-position detecting device comprising a white board as a coordinate-position entry area, and three reflecting members each for recursively reflecting light from two optical units. The angle between the write-in surface of the white board and the reflecting surface of the reflecting member at the bottom is an obtuse angle. Further, of angles obtained by dividing the above angle by a horizontal surface, the angle between the horizontal surface and the reflecting surface is an acute angle.