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CAPACITIVE FINGERPRINT SENSOR WITH SENSING ELEMENTS COMPRISING TIMING CIRCUITRY
专利权人:
发明人:
RIEDIJK FRANK
申请号:
IN201727013216
公开号:
IN201727013216A
申请日:
2017.04.13
申请国别(地区):
IN
年份:
2017
代理人:
摘要:
The present invention relates to a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger the capacitive fingerprint sensor comprising a plurality of sensing elements each including: a protective dielectric top layer to be touched by the fingeran electrically conductive sensing structure arranged underneath the top layercharge measuring circuitry connected to the sensing structure for sequentially transitioning between at least a first measurement state and a second measurement state to perform a measurement sequence resulting in an output signal from the charge measuring circuitry being indicative of a change of a charge carried by the sensing structure resulting from a change in a potential difference between the finger and the sensing structure and timing circuitry connected to the charge measuring circuitry for controlling a timing of at least one of the measurement states.
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中国工程科技知识中心
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http://www.ckcest.cn/home/

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