发明名称 |
Minimizing mismatch during compensation |
摘要 |
A method and apparatus for minimizing mismatch effects between a compensation signal and an output signal generated by a touch surface device is disclosed. In one embodiment the apparatus includes a touch-sensitive panel having a sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a drive circuit for generating a sinusoidal drive signal provided to the sense node of the touch-sensitive panel; at least one non-touch-sensitive node within the touch-sensitive panel, for generating a sinusoidal compensation signal, wherein the sinusoidal compensation signal is summed with the output signal to provide a sinusoidal compensated output signal; and a sensing circuit for receiving the sinusoidal compensated output signal. |
申请公布号 |
US8711129(B2) |
申请公布日期 |
2014.04.29 |
申请号 |
US20070650038 |
申请日期 |
2007.01.03 |
申请人 |
HOTELLING STEVE PORTER;LAND BRIAN RICHARDS;APPLE INC. |
发明人 |
HOTELLING STEVE PORTER;LAND BRIAN RICHARDS |
分类号 |
G09G5/00 |
主分类号 |
G09G5/00 |
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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