发明名称 |
Active Stylus Self-Capacitance Measurement |
摘要 |
In one embodiment, a method includes modifying an amount of charge of a capacitance of a touch sensor. The modified amount of charge results in a voltage at the capacitance being a first pre-determined voltage level. The method also includes applying a first pre-determined amount of charge to the capacitance. The application of the first pre-determined amount of charge to the capacitance modifies the voltage at the capacitance from the first pre-determined voltage level to a first charging voltage level. The method also includes determining a first voltage at a sampling capacitor. The first voltage is proportional to a difference between the first charging voltage level and a reference voltage level. The method also includes determining whether a touch and stylus input to the touch sensor has occurred based on the first voltage and a second voltage. |
申请公布号 |
US2014043279(A1) |
申请公布日期 |
2014.02.13 |
申请号 |
US201213571016 |
申请日期 |
2012.08.09 |
申请人 |
PEDERSEN TROND JARLE;BAKKEN VEMUND KVAL |
发明人 |
PEDERSEN TROND JARLE;BAKKEN VEMUND KVAL |
分类号 |
G06F3/045 |
主分类号 |
G06F3/045 |
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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