Invention Grant
- Patent Title: Control method for optical fingerprint sensor and related control circuit and optical fingerprint sensor
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Application No.: US16907176Application Date: 2020-06-20
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Publication No.: US11295108B2Publication Date: 2022-04-05
- Inventor: Tsen-Wei Chang , Chih-Peng Hsia , Wei-Lun Shih , Hong-Chu Chen , Su-Wei Lien , Sheng-Wen Hsiao , Liang-Chi Cheng
- Applicant: NOVATEK Microelectronics Corp.
- Applicant Address: TW Hsin-Chu
- Assignee: NOVATEK Microelectronics Corp.
- Current Assignee: NOVATEK Microelectronics Corp.
- Current Assignee Address: TW Hsin-Chu
- Agent Winston Hsu
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G09G3/36 ; G06F3/041 ; G06F3/044

Abstract:
A control method for an optical fingerprint sensor is provided for canceling or reducing capacitive loading. The optical fingerprint sensor includes a plurality of pixels, and each of the pixels has a first control signal line and a second control signal line. Each of the pixels is further coupled to a first voltage source line, a second voltage source line and a sensing line. The control method includes a plurality of steps, and the steps are applying a first anti-loading driving (ALD) signal on the second control signal line, and applying a second ALD signal on at least one of the first control signal line, the first voltage source line, the second voltage source line and the sensing line.
Public/Granted literature
- US20200342196A1 Control method for optical fingerprint sensor and related control circuit and optical fingerprint sensor Public/Granted day:2020-10-29
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