公开(公告)号：US11195458B2

公开(公告)日：2021-12-07

申请号：US16727943

申请日：2019-12-27

Applicant: Novatek Microelectronics Corp.

Inventor： Wen-Pin Tsai

IPC: G09G3/3233 ,  G09G3/20

Abstract: A driving circuit that includes a plurality of sub-driving circuits, a plurality of latch circuits and a plurality of first switching circuits is introduced. The sub-driving circuits is configured to supply a plurality of driving currents to drive a first group of light sources to emit light to form a first pixel on a display medium. A quantity of the sub-driving circuits is corresponding to a first data resolution of pixel data of the first pixel. Each of the latch circuits is configured to store a different bit of the pixel data of the first pixel. The first switching circuits are respectively coupled to the sub-driving circuits and are configured to control the plurality of sub-driving circuits to supply the driving currents to the first group of light sources according to the pixel data.

公开(公告)号：US11194424B2

公开(公告)日：2021-12-07

申请号：US16876167

申请日：2020-05-18

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Feng-Lin Chan ,  Hung-Kai Chen ,  Yuan-Fu Hsueh ,  Chun-Yuan Pai

IPC: G06F3/041

Abstract: The driving apparatus for driving a touch display panel includes a first voltage generating circuit configured to generate a common reference voltage, a second voltage generating circuit configured to generate a touch driving signal, and a control circuit configured to generate a switching signal. The switching signal is at the first voltage level during display periods for providing the common reference voltage to the touch display panel. The switching signal is at the second voltage level during touch periods for providing the touch driving signal to the touch display panel. A first touch display period includes a first display period a first touch period adjacent to the first display period. A second touch display period includes a second display period and a second touch period adjacent to the second display period. The first touch display period and the second touch display period are different in time length.

公开(公告)号：US20210373736A1

公开(公告)日：2021-12-02

申请号：US17331197

申请日：2021-05-26

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Huang Chen ,  Feng-Lin Chan

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch sensing method for a touch panel and an electronic device are provided. The touch sensing method includes: selecting a portion of multiple touch sensing units as to-sense touch sensing units, applying first touch excitation signals to the those to obtain multiple first touch sensing signals, and obtaining multiple differential sensing signals based on multiple first touch sensing signals; selecting a touch sensing unit as a reference touch sensing unit, and applying a touch reference signal to it to obtain a reference sensing signal; selecting a to-sense touch sensing unit as a preprocessing touch sensing unit, and applying a second touch excitation signal to it to obtain a second touch sensing signal; obtaining a capacitance sensing signal from the reference sensing signal and the second touch sensing signal; and acquiring capacitance values of multiple to-sense touch sensing units according to the differential sensing signals and the capacitance sensing signal.

公开(公告)号：US11190198B1

公开(公告)日：2021-11-30

申请号：US16953311

申请日：2020-11-19

Applicant: NOVATEK Microelectronics Corp.

Inventor： Guan-Ying Huang ,  Chih-Yuan Chang

IPC: H03M1/06 ,  H03H19/00

Abstract: A switched capacitor circuit includes an output capacitor, a first transmission switch, a first reference buffer, a second transmission switch, a second reference buffer and a charge compensation circuit. The output capacitor includes a first terminal and a second terminal, wherein the first terminal is coupled to an output terminal of the switched capacitor circuit, and the second terminal is coupled to a reference node. The first transmission switch is coupled to the reference node. The first reference buffer is coupled to the first transmission switch. The second transmission switch is coupled to the reference node. The second reference buffer is coupled to the second transmission switch. The charge compensation circuit is coupled to the reference node.

公开(公告)号：US11182019B2

公开(公告)日：2021-11-23

申请号：US16931455

申请日：2020-07-17

Applicant: Novatek Microelectronics Corp.

Inventor： Chung-Cher Lin ,  Yun-Hsiang Yeh ,  Ta-Keng Weng

IPC: G06F3/041

Abstract: A touch scanning method shortening a first touch latency includes: scanning a Mth column of the N-column touch panel according to a touch scan (TSHD) signal; determining whether the finger is on the Mth column of the N-column touch panel according to a scan data signal; performing a fast done process according to a fast done signal when the finger is on the Mth column of the N-column touch panel; determining whether M equals to N when the finger is not on the Mth column of the N-column touch panel; and resetting M to 1 according to a scan start signal and performing an algorithm according to a finish flag signal.

公开(公告)号：US20210349599A1

公开(公告)日：2021-11-11

申请号：US17313796

申请日：2021-05-06

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hung-Hsiang Chen ,  Chang-Hung Chen ,  Huang-Chin Tang

IPC: G06F3/041 ,  G09G3/3225

Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and an OLED touch-and-display device. The method includes: dividing each display frame into at least one display period and at least one touch detection period which are alternated; during each display period, generating sequentially-shifted gate driving signals and sequentially-shifted light-emission control signals, and sequentially applying the sequentially-shifted gate driving signals to at least a part of gate driving lines, and sequentially applying the sequentially-shifted light-emission control signals to at least a part of light-emission control lines; during each touch detection period, suspending generation of sequentially-shifted gate driving signals without suspending generation of sequentially-shifted light-emission control signals; and during a period when a gate driving signal for each row of pixels is of active level, maintaining a light-emission control signal for the row of pixels at inactive level.

公开(公告)号：US20210304677A1

公开(公告)日：2021-09-30

申请号：US17199468

申请日：2021-03-12

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jun-Yu Yang ,  Wei-Jhe Ma ,  Yung-Cheng Tsai ,  Feng-Ting Pai

IPC: G09G3/3258

Abstract: The present invention provides an image compensation circuit generating output image data to drive a display panel having pixels. The image compensation circuit includes first/second control circuits and first/second compensation circuits. The first control circuit may receive input image data for the pixels and generate a plurality of first compensation values corresponding to compensation for voltage drop on the display panel according to the input image data. The first compensation circuit may compensate the input image data for the pixels with the first compensation values. The second control circuit may receive the first compensation values from the first control circuit and generate a plurality of second compensation values corresponding to compensation for channel length modulation (CLM) effect of the pixels according to the first compensation values. The second compensation circuit may compensate the input image data for the pixels with the second compensation values, to generate the output image data.

公开(公告)号：US11128219B1

公开(公告)日：2021-09-21

申请号：US16882569

申请日：2020-05-25

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chun-Yu Hsieh

IPC: H02M3/158 ,  H02M3/07 ,  G09G3/36 ,  H02M1/00

Abstract: A control circuit for at least one voltage generator includes a first transistor, a first controller, a second transistor, a second controller and a communicator. The first transistor is coupled to a first output terminal of the at least one voltage generator. The first controller is coupled to a control terminal of the first transistor. The second transistor is coupled to a second output terminal of the at least one voltage generator. The second controller is coupled to a control terminal of the second transistor. The communicator, coupled between the first controller and the second controller, is configured to selectively control the first controller and the second controller to communicate with each other or not according to the at least one voltage generator.

公开(公告)号：US11126292B2

公开(公告)日：2021-09-21

申请号：US16175845

申请日：2018-10-31

Applicant: Novatek Microelectronics Corp.

Inventor： Hui-Hung Chang ,  Meng-Hsiu Wu

IPC: G06F3/041 ,  G06F13/36 ,  G06F3/044 ,  G06F8/71

Abstract: An electronic apparatus with a touch panel including a host controller, an interface unit, and a touch panel control unit is provided. The host controller is used to control an electronic apparatus implemented with the host controller. The touch panel control unit is coupled to the host controller through the interface unit. The host controller transmits an updating information to the touch panel control unit with a format of the interface unit, in which the updating data is used to update the touch panel control unit. The touch panel control unit decodes the updating data to accordingly update.

公开(公告)号：US11113376B2

公开(公告)日：2021-09-07

申请号：US16907117

申请日：2020-06-19

Applicant: NOVATEK Microelectronics Corp.

Inventor： Sheng-Ruei Hsu ,  Chi-Ting Chen

IPC: G06F21/32 ,  G06F3/0488 ,  G06K9/00

Abstract: The present invention discloses a method of finger touch authentication through a fingerprint sensor. The method includes obtaining a plurality of touch operations through the fingerprint sensor, detecting a pattern of the plurality of touch operations; comparing the pattern with a registered pattern to generate a comparison result, and authenticating the plurality of touch operations on the basis of the comparison result, wherein the pattern indicates at least one feature, and the fingerprint sensor is capable of authenticating a fingerprint of a user after or before the finger touch authentication.