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.

公开(公告)号：US20210272529A1

公开(公告)日：2021-09-02

申请号：US16805818

申请日：2020-03-01

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chieh-Cheng CHEN ,  Chih-Chia KUO

IPC: G09G3/36

Abstract: A display driver circuit, configured to drive a display panel, includes a time recording circuit, a storage circuit, and an output control circuit. The time recording circuit calculates a first time interval between a first vertical synchronous pulse and a second vertical synchronous pulse subsequent to the first vertical synchronous pulse. The storage circuit stores a display data corresponding to the first vertical synchronous pulse when the first vertical synchronous pulse is received by the display driver circuit. The output control circuit is coupled with the time recording circuit and the storage circuit. When the display driver circuit receives the second vertical synchronous pulse, the output control circuit outputs data pieces, generated by dividing the display data, to the display panel. The data pieces are outputted at second time intervals, and each of the second time intervals is positively correlated with the first time interval.

公开(公告)号：US11094248B2

公开(公告)日：2021-08-17

申请号：US16824712

申请日：2020-03-20

Applicant: Novatek Microelectronics Corp.

Inventor： Sheng-Wen Hsiao

IPC: G09G3/20 ,  G09G3/32

Abstract: An LED driving apparatus for driving an LED array including an output terminal group and a converter group is provided. The output terminal group includes a plurality of output terminals. The converter group includes a plurality of digital-to-analog converters. Each of the digital-to-analog converters outputs a driving current according to pixel data to drive a corresponding one of the LEDs. Each of digital-to-analog converters includes a plurality of sub-driving current generating circuits. The sub-driving current generating circuits are coupled to the corresponding output terminal of the output terminal group. Each of the sub-driving current generating circuits generates a sub-driving current having a current value corresponding to a bit order of a bit of the pixel data. The driving current is generated by summing up the sub-driving currents.

公开(公告)号：US20210200977A1

公开(公告)日：2021-07-01

申请号：US17123134

申请日：2020-12-16

Applicant: Novatek Microelectronics Corp.

Inventor： Jou-Chia Chen ,  Hsing-Lung Chung ,  Ding-Teng Shih ,  Yi-Ting Chung

IPC: G06K9/00 ,  G06F3/041 ,  G06F21/32 ,  G06F21/84

Abstract: A driver integrated circuit for fingerprint sensing, touch sensing and display driving and a driving method thereof are provided. The driver integrated circuit is adapted for driving a touch display panel with a fingerprint sensor. The driver integrated circuit includes a fingerprint sensing control circuit, a display driving circuit, and a display driving circuit. The fingerprint sensing control circuit drives the fingerprint sensor to perform a fingerprint sensing operation. The display driving circuit drives the touch display panel to perform a display operation. The touch sensing control circuit drives the touch display panel to perform a touch operation. The fingerprint sensing control circuit and the display driving circuit have a first direct communication therebetween so as to facilitate at least one of the fingerprint sensing operation and the display operation.

公开(公告)号：US11049471B2

公开(公告)日：2021-06-29

申请号：US16524264

申请日：2019-07-29

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Jun-Yu Yang ,  Shang-Yu Su ,  Feng-Ting Pai

IPC: G09G5/02

Abstract: A display control circuit transforms a plurality of input points of an input image to a plurality of target subpixels of a display panel. In the display panel, a first row of the target subpixels and a second row of the target subpixels are non-aligned in a vertical direction. The display control circuit includes a subpixel rendering circuit. The subpixel rendering circuit maps a first row of the input points to the first row of the target subpixels, and maps a second row of the input points to the second row of the target subpixels. The coordinates of the first row of the input points are respectively equivalent to the coordinates of the first row of the target subpixels. The coordinates of the second row of the input points are respectively equivalent to the coordinates of the second row of the target subpixels being shifted in a horizontal direction.

公开(公告)号：US20210191539A1

公开(公告)日：2021-06-24

申请号：US17126049

申请日：2020-12-18

Applicant: Novatek Microelectronics Corp.

Inventor： Yen-Cheng Cheng

IPC: G06F3/044 ,  G06F3/041 ,  H04B1/04

Abstract: The disclosure includes a touch display apparatus having AFE circuit that performs a noise cancellation of an AFE channel by utilizing noise signal received by a neighboring AFE channels. The first AFE channel includes a first integrator having an input terminal coupled to the first terminal receiving a first sensing signal. The second AFE channel includes an input amplifier. The second AFE channel is coupled between the input terminal of the first integrator in the first AFE channel and a second terminal connected to the touch panel. The second AFE channel is configured to generate a reversal input signal based on a second sensing signal received by the second terminal and couple the reversal input signal to a common node between the first integrator and the first terminal.

公开(公告)号：US11037331B1

公开(公告)日：2021-06-15

申请号：US16748461

申请日：2020-01-21

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Cong Zhang ,  Jian-Hua Liang ,  Yuan-Jia Du

IPC: G06K9/46 ,  G06T9/20

Abstract: A method for de-contouring a source image is provided. In the method, a reference image is obtained based on the source image. Multi-oriented gradient calculation is performed on each pixel of the reference image, so as to obtain, for each pixel of the reference image, multiple gradient features that respectively correspond to multiple directions. For each pixel of the reference image, a monotonicity index is determined based on the corresponding gradient features. Then, a detail-protecting and de-contour operation is performed on the source image based on the monotonicity indices determined for the pixels of the reference image.