公开(公告)号：US11721123B2

公开(公告)日：2023-08-08

申请号：US17567907

申请日：2022-01-04

Applicant: Novatek Microelectronics Corp.

Inventor： Wei-Lun Shih ,  Tzu-Wen Hsieh ,  Huan-Teng Cheng ,  Huang-Chin Tang ,  Yueh-Teng Mai ,  Shi-Hao Huang ,  Jung-Chung Lee

IPC: G06F3/041 ,  G09G5/10 ,  G09G3/20 ,  G06V40/13

CPC classification number: G06V40/1318 ,  G09G5/10 ,  G06F3/0416 ,  G09G2320/0626

Abstract: An electronic circuit adapted to drive a display panel is provided. The display panel includes touch sensors and fingerprint sensors. The electronic circuit includes a touch sensing circuit, a fingerprint sensing circuit and a display driving circuit. The touch sensing circuit senses a touch of a finger and determines a first area corresponding to the touch on the display panel. The fingerprint sensing circuit senses a fingerprint image of the finger corresponding to the first area. The display driving circuit drives pixels of the first area with respective first gray levels and pixels of a second area outside the first area with respective second gray levels. The display driving circuit processes respective third gray levels to obtain the respective second gray levels. The display driving circuit generates gamma voltages corresponding to the respective first gray levels and the respective second gray levels according to the same gamma curve.

公开(公告)号：US20230196962A1

公开(公告)日：2023-06-22

申请号：US18170541

申请日：2023-02-17

Applicant: Novatek Microelectronics Corp.

Inventor： Huan-Teng Cheng ,  Ting-Hsuan Hung ,  Tzu-Wen Hsieh ,  Wei-Lun Shih ,  Huang-Chin Tang

IPC: G09G3/20 ,  G06F3/041 ,  G06V40/13

CPC classification number: G09G3/20 ,  G06F3/0412 ,  G06V40/1318 ,  G09G2310/0272

Abstract: An electronic circuit for operating with a display panel including touch sensors and fingerprint sensors is provided. The electronic circuit includes a first circuit, a second circuit, a third circuit, a first switch circuit and a control circuit. The first circuit generates display driving signals for driving the display panel. The second circuit receives fingerprint sensing signals from the fingerprint sensors. The third circuit determines a touch information according to touch sensing signals from the touch sensors. The first switch circuit includes a plurality of first switch units, each of the first switch units includes a first switch element and a second switch element. The control circuit controls the first switch circuit to transmit the display driving signals in a first time interval, controls the first switch circuit to transmit the fingerprint sensing signals in a second time interval, and controls the third circuit to receive the fingerprint sensing signals in a third time interval.

公开(公告)号：US11631363B2

公开(公告)日：2023-04-18

申请号：US17563047

申请日：2021-12-28

Applicant: Novatek Microelectronics Corp.

Inventor： Huan-Teng Cheng

IPC: G09G3/20

Abstract: An display driver and an operating method of the display driver are provided. The display driver includes a receiver comprising a bias current control circuit. The receiver receives image data. The bias current control circuit computes a data bit rate of the image data, and adjusting a bias current of the receiver according to the data bit rate. The operating method is adapted to the display driver.

公开(公告)号：US20230072200A1

公开(公告)日：2023-03-09

申请号：US17563047

申请日：2021-12-28

Applicant: Novatek Microelectronics Corp.

Inventor： Huan-Teng Cheng

IPC: G09G3/20

Abstract: An display driver and an operating method of the display driver are provided. The display driver includes a receiver comprising a bias current control circuit. The receiver receives image data. The bias current control circuit computes a data bit rate of the image data, and adjusting a bias current of the receiver according to the data bit rate. The operating method is adapted to the display driver.

公开(公告)号：US11320928B2

公开(公告)日：2022-05-03

申请号：US16944157

申请日：2020-07-31

Applicant: Novatek Microelectronics Corp.

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

IPC: G06F3/041 ,  G06K9/00 ,  G06F3/044 ,  G09G3/20

Abstract: An electronic circuit is adapted to drive a display panel having touch sensors and fingerprint sensors. The electronic circuit includes a first circuit, a second circuit, a first switch circuit and a control circuit. The first circuit processes touch sensing signals from the touch sensors. The second circuit processes fingerprint sensing signals corresponding to a fingerprint from the fingerprint sensors. The first switch circuit includes a plurality of first terminals coupled to the first circuit and the second circuit and a plurality of second terminals configurable to be coupled to the display panel. The first switch circuit couples a part of the first terminals to the second terminals in a first time interval and couples the other part of the first terminals to the second terminals in a second time interval. The touch sensing signals and the fingerprint sensing signals are inputted to the electronic circuit through the second terminals.

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：US10775921B2

公开(公告)日：2020-09-15

申请号：US16237754

申请日：2019-01-02

Applicant: NOVATEK Microelectronics Corp.

Inventor： Huan-Teng Cheng ,  Huang-Chin Tang

IPC: G06F3/041 ,  G09G5/12

Abstract: A method of controlling timing for a touch and display driver system includes the steps of: receiving an external signal; generating a plurality of time units each having a display period and a touch period; generating an internal signal for controlling a display operation in the display period; and synchronizing the internal signal with the external signal for a time unit among the plurality of time units at a time point different from at least one of the start of the time unit and the end of the time unit.