公开(公告)号：US10283071B2

公开(公告)日：2019-05-07

申请号：US15891389

申请日：2018-02-08

Applicant: Novatek Microelectronics Corp.

Inventor： I-Te Liu ,  Chia-Wei Chang ,  Chien-Yu Chen ,  Hsien-Wen Lo

IPC: G09G3/20 ,  G09G3/36

Abstract: An integrated circuit for driving a display panel is provided. The integrated circuit includes a gamma mapping circuit and a mura compensation circuit. The gamma mapping circuit is configured to receive a gray level of an image data, map the gray level to a gamma code according to at least one gamma table, and output the gamma code. The mura compensation circuit is configured to receive the gamma code, and compensate the gamma code according to at least one de-mura table to generate a compensation result after the gamma mapping circuit performs the step of mapping the gray level to the gamma code. The integrated circuit drives the display panel according to the compensation result. In addition, a method for driving a display panel is also provided.

公开(公告)号：US20190340965A1

公开(公告)日：2019-11-07

申请号：US15973493

申请日：2018-05-07

Applicant: Novatek Microelectronics Corp.

Inventor： Chia-Wei Chang ,  Jen-Hao Liao ,  Po-Chuan Chang-Chian

IPC: G09G3/00 ,  G09G3/3233

Abstract: A display apparatus including a display panel, a display driver, a controller and an external circuit is introduced. The display drive includes a power circuit that supplies a first voltage and a second voltage to the display panel to sense a plurality of sensing currents flowing through the display panel according to the first voltage and the second voltage in a first operating mode. The display driver receives the plurality of sensing currents and a target current from the display panel in the first operating mode. The controller is coupled to the display driver and configured to determine a plurality of offsets according to the plurality of sensing currents and the target current in the first operating mode. The external memory is coupled to the controller and the display driver to store the offsets in the first operating mode. The display driver and a method adapted to a display apparatus are also introduced.

公开(公告)号：US11151944B2

公开(公告)日：2021-10-19

申请号：US16802578

申请日：2020-02-27

Applicant: Novatek Microelectronics Corp.

Inventor： Yung-Yu Hsieh ,  Tse-Yuan Chen ,  Jen-Hao Liao ,  Chun-Hsiao Teng ,  Chia-Wei Chang

IPC: G09G3/3266 ,  G09G3/3291

Abstract: A driving circuit, a display apparatus and a driving method thereof are provided. The display panel is divided into a plurality of regions including a first region having a rectangular form and a second region having a free form. The driving circuit generates a plurality of control clocks having a first duty cycle during a first period and a second duty cycle different from the first duty cycle during a second period, or having a first phase shift during the first period and a second phase shift different from the first phase shift during the second period, or having a first driving capability during the first period and a second driving capability different from the first driving capability during the second period. Wherein, the control clocks are configured to be transmitted to a gate driving circuit disposed on the display panel for generating a first plurality of scan signals controlling the first region and a second plurality of scan signals controlling the second region according to the control clocks, so as to reduce a luminance difference between the first region and the second region.

公开(公告)号：US20200273409A1

公开(公告)日：2020-08-27

申请号：US16802578

申请日：2020-02-27

Applicant: Novatek Microelectronics Corp.

Inventor： Yung-Yu Hsieh ,  Tse-Yuan Chen ,  Jen-Hao Liao ,  Chun-Hsiao Teng ,  Chia-Wei Chang

IPC: G09G3/3266 ,  G09G3/3291

Abstract: A driving circuit, a display apparatus and a driving method thereof are provided. The display panel is divided into a plurality of regions including a first region having a rectangular form and a second region having a free form. The driving circuit generates a plurality of control clocks having a first duty cycle during a first period and a second duty cycle different from the first duty cycle during a second period, or having a first phase shift during the first period and a second phase shift different from the first phase shift during the second period, or having a first driving capability during the first period and a second driving capability different from the first driving capability during the second period. Wherein, the control clocks are configured to be transmitted to a gate driving circuit disposed on the display panel for generating a first plurality of scan signals controlling the first region and a second plurality of scan signals controlling the second region according to the control clocks, so as to reduce a luminance difference between the first region and the second region.

公开(公告)号：US10699662B2

公开(公告)日：2020-06-30

申请号：US15614629

申请日：2017-06-06

Applicant: Novatek Microelectronics Corp.

Inventor： I-Te Liu ,  Chia-Wei Chang ,  Chien-Yu Chen ,  Hsien-Wen Lo

IPC: G09G3/36 ,  G09G3/20 ,  G09G3/3233

Abstract: An integrated circuit for driving a display panel is provided. The integrated circuit includes a gamma mapping unit and a mura compensation unit. The gamma mapping unit is configured to receive a gray level of an image data, map the gray level to a gamma code according to at least one gamma table, and output the gamma code. The mura compensation unit is configured to receive the gamma code, and compensate the gamma code according to at least one de-mura table to generate a compensation result after the gamma mapping unit performs the step of mapping the gray level to the gamma code. The integrated circuit drives the display panel according to the compensation result. In addition, a method for driving a display panel is also provided.

公开(公告)号：US10593243B2

公开(公告)日：2020-03-17

申请号：US15973493

申请日：2018-05-07

Applicant: Novatek Microelectronics Corp.

Inventor： Chia-Wei Chang ,  Jen-Hao Liao ,  Po-Chuan Chang-Chian

IPC: G09G3/00 ,  G09G3/3233

Abstract: A display apparatus including a display panel, a display driver, a controller and an external circuit is introduced. The display drive includes a power circuit that supplies a first voltage and a second voltage to the display panel to sense a plurality of sensing currents flowing through the display panel according to the first voltage and the second voltage in a first operating mode. The display driver receives the plurality of sensing currents and a target current from the display panel in the first operating mode. The controller is coupled to the display driver and configured to determine a plurality of offsets according to the plurality of sensing currents and the target current in the first operating mode. The external memory is coupled to the controller and the display driver to store the offsets in the first operating mode. The display driver and a method adapted to a display apparatus are also introduced.

公开(公告)号：US20180166030A1

公开(公告)日：2018-06-14

申请号：US15891389

申请日：2018-02-08

Applicant: Novatek Microelectronics Corp.

Inventor： I-Te Liu ,  Chia-Wei Chang ,  Chien-Yu Chen ,  Hsien-Wen Lo

IPC: G09G3/36 ,  G09G3/3258

CPC classification number: G09G3/3696 ,  G09G3/20 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/046

Abstract: An integrated circuit for driving a display panel is provided. The integrated circuit includes a gamma mapping circuit and a mura compensation circuit. The gamma mapping circuit is configured to receive a gray level of an image data, map the gray level to a gamma code according to at least one gamma table, and output the gamma code. The mura compensation circuit is configured to receive the gamma code, and compensate the gamma code according to at least one de-mura table to generate a compensation result after the gamma mapping circuit performs the step of mapping the gray level to the gamma code. The integrated circuit drives the display panel according to the compensation result. In addition, a method for driving a display panel is also provided.

公开(公告)号：US20180075802A1

公开(公告)日：2018-03-15

申请号：US15614629

申请日：2017-06-06

Applicant: Novatek Microelectronics Corp.

Inventor： I-Te Liu ,  Chia-Wei Chang ,  Chien-Yu Chen ,  Hsien-Wen Lo

IPC: G09G3/3233 ,  G09G3/36

Abstract: An integrated circuit for driving a display panel is provided. The integrated circuit includes a gamma mapping unit and a mura compensation unit. The gamma mapping unit is configured to receive a gray level of an image data, map the gray level to a gamma code according to at least one gamma table, and output the gamma code. The mura compensation unit is configured to receive the gamma code, and compensate the gamma code according to at least one de-mura table to generate a compensation result after the gamma mapping unit performs the step of mapping the gray level to the gamma code. The integrated circuit drives the display panel according to the compensation result. In addition, a method for driving a display panel is also provided.