发明名称 |
HIGH SPEED LOW POWER MULTI-TOUCH TOUCH DEVICE AND CONTROLLER THEREFOR |
摘要 |
A touch-sensitive device includes a touch panel, a drive unit, a sense unit, and a measurement unit. A touch applied to a node of the panel changes a capacitive coupling between two electrodes (a drive electrode and a sense electrode) of the touch panel. The drive unit delivers a drive signal, which may comprise one or more drive pulses, to the drive electrode. The sense unit couples to the sense electrode, and generates a response signal that that is used to accumulate charge in a charge accumulator to provide an accumulated signal. The accumulated signal is responsive to the capacitive coupling between the electrodes, and is measured to provide an indication of a touch at the node. |
申请公布号 |
WO2011149750(A2) |
申请公布日期 |
2011.12.01 |
申请号 |
WO2011US37096 |
申请日期 |
2011.05.19 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
REBESCHI, THOMAS J.,;CORDEIRO, CRAIG A., |
分类号 |
G06F3/044;G06F3/041;G09G3/20 |
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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