发明名称 |
Touch sensing apparatus |
摘要 |
A touch sensing apparatus includes a signal source for generating an alternating current signal, a conductor connected to the signal source, a sensor for receiving a noise generated by a contact of an object. The sensor together with the conductor form a simulated capacitor that results in alternating current signal flowing through the sensor when the sensor is contacted by the object. A detector has a first input end and a second input end. The detector results in voltage differences between the first and second input ends thereof when receiving the alternating current signal output from the sensor, and thus output a signal. A rectifying circuit is used for rectifying the alternating current signal generated by the signal source and simultaneously generating a noise. One end of the rectifier circuit is connected to the signal source and other end of the rectifier circuit is connected to the negative power input end of the detector.
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申请公布号 |
US7170301(B1) |
申请公布日期 |
2007.01.30 |
申请号 |
US20060308892 |
申请日期 |
2006.05.23 |
申请人 |
HONG FU JIN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD. |
发明人 |
HSIEH KUAN-HONG;CHUNG SHIN-HONG;WANG HAN-CHE;LIN SHI-QUAN |
分类号 |
G01R27/26;H03K17/955;H03K17/96 |
主分类号 |
G01R27/26 |
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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