- 专利标题: Multiphase fingerprint sensor layout and construction
-
申请号: US16017513申请日: 2018-06-25
-
公开(公告)号: US11113497B2公开(公告)日: 2021-09-07
- 发明人: Igor Kravets , Oleksandr Hoshtanar , Hans Klein , Oleksandr Karpin
- 申请人: Cypress Semiconductor Corporation
- 申请人地址: US CA San Jose
- 专利权人: Cypress Semiconductor Corporation
- 当前专利权人: Cypress Semiconductor Corporation
- 当前专利权人地址: US CA San Jose
- 主分类号: G06F3/044
- IPC分类号: G06F3/044 ; G06K9/00 ; G06F3/041
摘要:
A capacitive fingerprint sensor includes a set of capacitive sensor electrodes in a sensing area. The set of capacitive sensor electrodes includes a set of transmit (Tx) sensor electrodes, a set of receive (Rx) sensor electrodes, and a set of compensation electrodes. The fingerprint sensor also includes a multiphase capacitance sensor that is configured to perform a sensing scan of the capacitive sensor electrodes by applying a first Tx signal to a first subset of the Tx sensor electrodes while simultaneously applying a second Tx signal to a second subset of the set of Tx sensor electrodes, and based on a compensation signal received at the set of compensation electrodes, reduce a component of the Rx signal originating from a source other than a contact at the sensing area.
公开/授权文献
- US20190005293A1 Multiphase Fingerprint Sensor Layout and Construction 公开/授权日:2019-01-03
信息查询