发明名称 |
Coordinate input apparatus and control method and program therefor |
摘要 |
A light irradiated on a coordinate input screen from a pointing device is detected, and pieces of output information obtained as detection results for light at least at three known positions including first to third positions are stored. The coordinate values of the light formed on the coordinate input screen are calculated using at least two of the stored pieces of output information at the first to third positions.
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申请公布号 |
US6900791(B2) |
申请公布日期 |
2005.05.31 |
申请号 |
US20010900065 |
申请日期 |
2001.07.06 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
TANAKA ATSUSHI;KOBAYASHI KATSUYUKI |
分类号 |
G06F3/041;G06F3/033;G06F3/042;(IPC1-7):G09G5/00;G09G5/08 |
主分类号 |
G06F3/041 |
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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