发明授权
- 专利标题: Touch panel sensing circuit
- 专利标题(中): 触摸屏感应电路
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申请号: US12755422申请日: 2010-04-07
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公开(公告)号: US08259087B2公开(公告)日: 2012-09-04
- 发明人: Ke-Horng Chen , Chi-Lin Chen , Yi-Chun Chen , Chih-Chung Chen , Chia-Lin Liu , Huai-An Li , Chi-Neng Mo
- 申请人: Ke-Horng Chen , Chi-Lin Chen , Yi-Chun Chen , Chih-Chung Chen , Chia-Lin Liu , Huai-An Li , Chi-Neng Mo
- 申请人地址: TW Bade, Taoyuan
- 专利权人: Chunghwa Picture Tubes, Ltd.
- 当前专利权人: Chunghwa Picture Tubes, Ltd.
- 当前专利权人地址: TW Bade, Taoyuan
- 代理商 Winston Hsu; Scott Margo
- 优先权: TW99103318A 20100204
- 主分类号: G06F3/045
- IPC分类号: G06F3/045
摘要:
In a capacitance sensing analog circuit of a touch panel sensing circuit, by raising a magnitude of a current flowing through a sensing capacitor to form an amplified sensing capacitance, while sensing the amplified sensing capacitance with the aid of pulse width modulation signals, higher resolution of the original sensing capacitance may thus be achieved. Besides, by using a self-calibrating capacitance sensing circuit on the touch panel sensing circuit, linear errors and DC errors of an output signal of the capacitance sensing analog circuit may be filtered off, and thereby resolution of a capacitance amplifying ratio may be effectively raised so as to relieve errors within the capacitance amplifying ratio caused by noises.
公开/授权文献
- US20110186359A1 Touch Panel Sensing Circuit 公开/授权日:2011-08-04