发明授权
- 专利标题: Touch detection techniques for capacitive touch sense systems
- 专利标题(中): 触摸检测技术用于电容式触摸感测系统
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申请号: US13047620申请日: 2011-03-14
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公开(公告)号: US08248084B2公开(公告)日: 2012-08-21
- 发明人: Louis W. Bokma , Andrew C. Page , Dennis R. Seguine
- 申请人: Louis W. Bokma , Andrew C. Page , Dennis R. Seguine
- 申请人地址: US CA San Jose
- 专利权人: Cypress Semiconductor Corporation
- 当前专利权人: Cypress Semiconductor Corporation
- 当前专利权人地址: US CA San Jose
- 主分类号: G01R27/26
- IPC分类号: G01R27/26 ; G06F3/041
摘要:
A technique for recognizing and rejecting false activation events related to a capacitance sense interface includes measuring a capacitance value of a capacitance sense element. The measured capacitance value is analyzed to determine a baseline capacitance value for the capacitance sensor. The capacitance sense interface monitors a rate of change of the measured capacitance values and rejects an activation of the capacitance sense element as a non-touch event when the rate of change of the measured capacitance values have a magnitude greater than a threshold level, indicative of a maximum rate of change of a touch event.
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