发明授权
- 专利标题： Touch-sensitive interface and method using orthogonal signaling
- 专利标题（中）： 使用正交信令的触敏接口和方法
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申请号： US12807333申请日： 2010-09-02
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公开(公告)号： US08605054B2公开(公告)日： 2013-12-10
- 发明人: William R. Krenik , Anand Dabak
- 申请人： William R. Krenik , Anand Dabak
- 申请人地址： US TX Dallas
- 专利权人： Texas Instruments Incorporated
- 当前专利权人： Texas Instruments Incorporated
- 当前专利权人地址： US TX Dallas
- 代理商 Alan A. R. Cooper; W. James Brady, III; Frederick J. Telecky, Jr.
- 主分类号： G06F3/041
- IPC分类号： G06F3/041 ; G06F3/038
摘要：
A touch screen system includes a capacitive touch screen (1) including a plurality of row conductors (7-1,2 . . . n) and a column conductor (5-1). A plurality of cotemporaneous orthogonal excitation signals (S1(t), S2(t) . . . Sn(t)) are simultaneously driven onto the row conductors, respectively. The capacitively coupled signals on the column conductor may be influenced by a touch (10) on the capacitive touch screen. Receiver circuitry (50) includes a sense amplifier (21-1) coupled to generate an amplifier output signal (r1(t)) in response to signals capacitively coupled onto the column conductor. WHT-based circuitry (35) determines amounts of signal contribution capacitively coupled by each of the excitation signals, respectively, to the amplifier output signal.
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