公开(公告)号：US11295108B2

公开(公告)日：2022-04-05

申请号：US16907176

申请日：2020-06-20

Applicant: NOVATEK Microelectronics Corp.

Inventor： Tsen-Wei Chang ,  Chih-Peng Hsia ,  Wei-Lun Shih ,  Hong-Chu Chen ,  Su-Wei Lien ,  Sheng-Wen Hsiao ,  Liang-Chi Cheng

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.

公开(公告)号：US20220092287A1

公开(公告)日：2022-03-24

申请号：US17407133

申请日：2021-08-19

Applicant: Novatek Microelectronics Corp.

Inventor： Wei-Lun Shih ,  Wu Wei Lin ,  Kuei Jung Chen

IPC: G06K9/00 ,  G06F3/041 ,  G09G3/36

Abstract: An electronic circuit adapted to control an operation of a gate driver circuit is provided. The electronic circuit includes a gate control circuit. The gate control circuit outputs control signals to the gate driver circuit in a display period and a fingerprint sensing period via the same output nodes. The control signals include a start pulse signal and a switch control signal. The switch control signal controls the gate driver circuit to operate in the display period or the fingerprint sensing period. The gate driver circuit includes a plurality of shift register groups and a switch circuit. The shift register groups output scan signals according to the start pulse signal. The switch circuit receives and outputs the scan signals to display scan lines in the display period and outputs the scan signals to fingerprint scan lines in the fingerprint sensing period according to the switch control signal.

公开(公告)号：US20210357615A1

公开(公告)日：2021-11-18

申请号：US17216705

申请日：2021-03-30

Applicant: Novatek Microelectronics Corp.

Inventor： Wei-Lun Shih ,  Wu Wei Lin ,  Ting-Hsuan Hung ,  Wen-Yi Hsieh

IPC: G06K9/00 ,  G06F3/041

Abstract: In the invention, a fingerprint driving circuit, a fingerprint sensing device, an electronic apparatus, and an operation method of the fingerprint sensing device are provided. By keeping fingerprint sensing lines in a non-fingerprint sensing region in an electrically non-floating state, flash phenomenon in a display panel may be avoided.

公开(公告)号：US11170194B2

公开(公告)日：2021-11-09

申请号：US16865404

申请日：2020-05-03

Applicant: NOVATEK Microelectronics Corp.

Inventor： Huan-Teng Cheng ,  Wei-Lun Shih ,  Huang-Chin Tang

IPC: G06K9/00 ,  G09G3/34 ,  G06F1/3234 ,  G06F3/041 ,  G06F3/0481 ,  G09G5/10 ,  G06K9/20 ,  G06F3/0488 ,  G09G3/20

Abstract: A control circuit configured to control a display panel under normal display includes a display driver circuit, a touch sensing circuit and a fingerprint sensing circuit. The touch sensing circuit, coupled to the display driver circuit, is configured to detect a predetermined touch gesture on the display panel and determine a position of the display panel on which the predetermined touch gesture is detected. The fingerprint sensing circuit, coupled to the touch sensing circuit, is configured to perform fingerprint sensing on at least one zone corresponding to the position when the predetermined touch gesture is detected, in order to perform a specific function.

公开(公告)号：US20210081640A1

公开(公告)日：2021-03-18

申请号：US17107962

申请日：2020-12-01

Applicant: NOVATEK Microelectronics Corp.

Inventor： Tsen-Wei Chang ,  Chih-Peng Hsia ,  Wei-Lun Shih ,  Hong-Chu Chen ,  Su-Wei Lien ,  Sheng-Wen Hsiao ,  Liang-Chi Cheng

IPC: G06K9/00 ,  G06F3/041 ,  G06K9/20 ,  G06K9/03

Abstract: The present invention provides a control method for an optical fingerprint sensor and a touch controller. 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 the step of applying an anti-loading driving (ALD) signal on at least one of the first control signal line, the second control signal line, the first voltage source line, the second voltage source line and the sensing line when the touch controller is in a touch operation period.