发明授权
- 专利标题: Coordinate input apparatus
- 专利标题(中): 协调输入装置
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申请号: US777924申请日: 1991-10-17
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公开(公告)号: US5239138A公开(公告)日: 1993-08-24
- 发明人: Katsuyuki Kobayashi , Shinnosuke Taniishi , Atsushi Tanaka , Yuichiroh Yoshimura , Kiyoshi Kaneko , Ryohzo Yanagisawa , Takeshi Kamono
- 申请人: Katsuyuki Kobayashi , Shinnosuke Taniishi , Atsushi Tanaka , Yuichiroh Yoshimura , Kiyoshi Kaneko , Ryohzo Yanagisawa , Takeshi Kamono
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-279303 19901019
- 主分类号: G06K11/06
- IPC分类号: G06K11/06 ; G06F3/033 ; G06F3/043
摘要:
A coordinate input apparatus determines the coordinates of contact of a vibration pen with a vibration transmission plate by detecting vibrations from the pen through a vibration sensor. Constants required for measurement are generated in a constant determination circuit on the basis of vibration cycle measurements and a circuit measures the cycle of the detected vibrations from the vibration sensor using the determined constants. Automatic determination of constants eliminates inaccuracies due to component variations and reduces production costs and maintenance.
公开/授权文献
- US6160305A Beta dependent temperature sensor for an integrated circuit 公开/授权日:2000-12-12