发明名称 |
Self-Capacitance Measurement with Compensated Capacitance |
摘要 |
In one embodiment, a method includes dividing a first amount of charge between a capacitance of a touch sensor and a compensation capacitor. The division of the first amount of charge results in a first voltage at an input node. The method also includes applying a reference voltage at the input node. The application of the reference voltage at the input node induces a second amount of charge proportional to a difference between the first voltage and the reference voltage on an integration capacitor. The method also includes determining a first difference between the first voltage and the reference voltage based on a second amount of charge on the integration capacitor; and determining whether a touch input to the touch sensor has occurred based on the first difference.
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申请公布号 |
US2013307811(A1) |
申请公布日期 |
2013.11.21 |
申请号 |
US201213475644 |
申请日期 |
2012.05.18 |
申请人 |
HANSSEN INGAR;WHELAN RIAN |
发明人 |
HANSSEN INGAR;WHELAN RIAN |
分类号 |
G06F3/044 |
主分类号 |
G06F3/044 |
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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