Invention Grant
- Patent Title: Multiphase fingerprint sensor layout and construction
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Application No.: US16017513Application Date: 2018-06-25
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Publication No.: US11113497B2Publication Date: 2021-09-07
- Inventor: Igor Kravets , Oleksandr Hoshtanar , Hans Klein , Oleksandr Karpin
- Applicant: Cypress Semiconductor Corporation
- Applicant Address: US CA San Jose
- Assignee: Cypress Semiconductor Corporation
- Current Assignee: Cypress Semiconductor Corporation
- Current Assignee Address: US CA San Jose
- Main IPC: G06F3/044
- IPC: G06F3/044 ; G06K9/00 ; G06F3/041

Abstract:
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.
Public/Granted literature
- US20190005293A1 Multiphase Fingerprint Sensor Layout and Construction Public/Granted day:2019-01-03
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