Invention Grant
US09449212B2 Capacitive fingerprint sensor with sensing elements comprising timing circuitry
有权
具有包含定时电路的感测元件的电容式指纹传感器
- Patent Title: Capacitive fingerprint sensor with sensing elements comprising timing circuitry
- Patent Title (中): 具有包含定时电路的感测元件的电容式指纹传感器
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Application No.: US14812578Application Date: 2015-07-29
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Publication No.: US09449212B2Publication Date: 2016-09-20
- Inventor: Frank Robert Riedijk
- Applicant: FINGERPRINT CARDS AB
- Applicant Address: SE Göteborg
- Assignee: FINGERPRINT CARDS AB
- Current Assignee: FINGERPRINT CARDS AB
- Current Assignee Address: SE Göteborg
- Agency: Remarck Law Group PLC
- Priority: SE1451633-0 20141222
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G01R27/26 ; G06F3/0354 ; G07C9/00

Abstract:
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 finger; an electrically conductive sensing structure arranged underneath the top layer; charge 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.
Public/Granted literature
- US20160180138A1 CAPACITIVE FINGERPRINT SENSOR WITH SENSING ELEMENTS COMPRISING TIMING CIRCUITRY Public/Granted day:2016-06-23
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