发明名称 |
Object position detection system and method |
摘要 |
A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matrix. The change in capacitance of each node in both the X and Y directions of the matrix due to the approach of an object is converted to a set of voltages in the X and Y directions. These voltages are processed by digital circuitry to develop electrical signals representative of the centroid of the profile of the object, i.e, its position in the X and Y dimensions. Noise reduction and background level setting techniques inherently available in the architecture are employed.
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申请公布号 |
US6239389(B1) |
申请公布日期 |
2001.05.29 |
申请号 |
US19990337862 |
申请日期 |
1999.06.21 |
申请人 |
SYNAPTICS, INC. |
发明人 |
ALLEN TIMOTHY P.;GILLESPIE DAVID;MILLER ROBERT J.;STEINBACH GüNTER |
分类号 |
G06F1/16;G06F3/033;G06F3/041;G06F3/044;G06F3/048;(IPC1-7):G08C21/00 |
主分类号 |
G06F1/16 |
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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