发明名称 |
MUTUAL CAPACITANCE MEASUREMENT IN A MULTI-TOUCH INPUT DEVICE |
摘要 |
Systems and methods for determining multiple touch events in a multi-touch sensor system are provided. The system may include a capacitance measurement unit, a pulse drive unit, and a touch sensor having a plurality of nodes and a plurality of electrodes comprising at least two sets of electrodes. The method may include connecting a first electrode in a first set to the capacitance measurement unit, the pulse drive unit driving a voltage or current pulse onto a second electrode in a second set of electrodes. The method may further include the capacitance measurement unit measuring the mutual capacitance at a node corresponding to the first and second electrodes. The method may include comparing the measured mutual capacitance at the node with a previously measured mutual capacitance for the node, and reporting that the node has been touched if there has been a deviation from the previously measured mutual capacitance. |
申请公布号 |
EP2564297(A1) |
申请公布日期 |
2013.03.06 |
申请号 |
EP20110718626 |
申请日期 |
2011.04.28 |
申请人 |
MICROCHIP TECHNOLOGY INCORPORATED |
发明人 |
HANAUER, JERRY;O'CONNOR, TODD |
分类号 |
G06F3/044;G06F3/041 |
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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