公开(公告)号：US20250046240A1

公开(公告)日：2025-02-06

申请号：US18361937

申请日：2023-07-31

Applicant: Novatek Microelectronics Corp.

Inventor： Zi-Yi Lian ,  Yen-Tao Liao

IPC: G09G3/3208

Abstract: The invention provides a display device and a Mura compensation method thereof. The display device includes a display panel and a Mura compensation circuit. The Mura compensation circuit defines a compensation area in the display panel based on a curve equation corresponding to a current frame rate of the display panel. The Mura compensation circuit calculates a compensation weight in the compensation area based on the current frame rate and the curve equation. The Mura compensation circuit uses the compensation weight to compensate a pixel data in the compensation area so as to generate a compensated pixel data frame. The Mura compensation circuit provides the compensated pixel data frame to the display panel for displaying images.

公开(公告)号：US12073797B1

公开(公告)日：2024-08-27

申请号：US18468747

申请日：2023-09-18

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ching-Hua Liu ,  Yen-Tao Liao

IPC: G09G3/3291 ,  G09G3/20

CPC classification number: G09G3/3291 ,  G09G3/2003 ,  G09G2300/0452 ,  G09G2310/08 ,  G09G2320/045 ,  G09G2360/16

Abstract: A driving method, for driving an organic light emitting diode (OLED) display panel, includes following steps. Input gray levels are received corresponding to red, green and blue subpixels on the OLED display panel. The input gray levels are mapped into current indices. A representative current index is calculated according to the current indices. The representative current index is compared with a current index threshold. In response to the representative current index being lower than the current index threshold, a voltage compensation value is generated according to the representative current index for shifting an initial voltage level utilized in an initial phase of the OLED display panel, and gray level compensation values are generated according to the current indices for adjusting the input gray levels into adjusted gray levels corresponding to the red, green and blue subpixels.

公开(公告)号：US20230306894A1

公开(公告)日：2023-09-28

申请号：US18076411

申请日：2022-12-07

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hui-Feng Lin ,  Yen-Tao Liao

IPC: G09G3/20 ,  G09G3/3208

CPC classification number: G09G3/2096 ,  G09G3/2007 ,  G09G3/3208 ,  G09G2320/0626 ,  G09G2320/0666 ,  G09G2320/0686 ,  G09G2330/021

Abstract: An image processing method, for processing image data to be displayed by a display panel having a display area being divided into multiple sub-areas, including: determining a power-saving ratio for each sub-area according to a power-saving level; and sequentially adjusting image data of each sub-area in the original image data according to the power-saving ratio corresponding to said sub-area to generate output image data. In the output image data, a characteristic value of the image data corresponding to one of the sub-areas is reduced.

公开(公告)号：US11140393B1

公开(公告)日：2021-10-05

申请号：US16898399

申请日：2020-06-10

Applicant: Novatek Microelectronics Corp.

Inventor： Hui-Yu Jiang ,  Heng-Yao Lin ,  Yen-Tao Liao

IPC: H04N19/124 ,  H04N19/186 ,  H04N19/159

Abstract: A display device that includes an encoder circuit, a decoder circuit and an overdrive circuit is introduced. The encoder circuit includes a prediction circuit, a quantization circuit, and a bitstream coding circuit. The prediction circuit performs a prediction operation on a first image frame to generate a second image frame. The quantization circuit performs a quantization operation on the second image frame based on a quantization parameter to generated a quantized image frame. The bitstream coding circuit encodes the quantized image frame to generate an encoded bit stream. The quantization parameter is determined according to a grey level of a pixel in the second image frame. The decoder circuit decodes the encoded bit stream to generate a reconstructed image frame. The overdrive circuit generates an overdrive image frame to be displayed on a display panel based on a third image frame and the reconstructed image frame.

公开(公告)号：US10217437B2

公开(公告)日：2019-02-26

申请号：US15448508

申请日：2017-03-02

Applicant: NOVATEK Microelectronics Corp.

Inventor： Lei Zhang ,  Danyu Fu ,  Yuanjia Du ,  Yen-Tao Liao

IPC: G09G5/02

Abstract: A method of color conversion from a red-green-blue (RGB) color space to a red-green-blue-white (RGBW) color space on an input image includes calculating RGB and white gains with respect to an image block of the input image, calculating RGB and white gain with respect to a pixel of the image block, wherein the white gain with respect to the pixel of the image block is adjusted based on the RGB gain with respect to the pixel of the image block, and performing the RGB to RGBW color conversion based on the RGB and white gain with respect to the pixel of the image block, which improves local color and detail performance of an output image corresponding to the input image.

公开(公告)号：US20240339067A1

公开(公告)日：2024-10-10

申请号：US18297626

申请日：2023-04-09

Applicant: Novatek Microelectronics Corp.

Inventor： Chan-Yi Lin ,  Yen-Tao Liao

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G2310/027

Abstract: A display device and a grayscale compensation method thereof. The display device includes a data conversion circuit, a voltage drop estimation circuit, and a compensation circuit. The data conversion circuit converts a plurality of original grayscale data of a target pixel block into current data. The voltage drop estimation circuit converts the current data into transmission line voltage drop information of the target pixel block. The compensation circuit converts the transmission line voltage drop information into at least one pixel compensation value of the target pixel block, and uses the at least one pixel compensation value to compensate the original grayscale data of the target pixel block, so as to generate a plurality of compensated grayscale data of the target pixel block.

公开(公告)号：US12112711B1

公开(公告)日：2024-10-08

申请号：US18454083

申请日：2023-08-23

Applicant: Novatek Microelectronics Corp.

Inventor： Li-Chieh Chen ,  Yen-Tao Liao

IPC: G09G3/3275

CPC classification number: G09G3/3275 ,  G09G2300/0819 ,  G09G2320/0233 ,  G09G2320/0242 ,  G09G2320/045

Abstract: The disclosure provides a processor and a pixel degradation compensation method thereof. The processor includes a processing circuit and a pixel degradation compensation circuit. The pixel degradation compensation circuit generates a current degradation value based on current sub-pixel data. The current degradation value represents the degradation effect of the current sub-pixel data on a corresponding sub-pixel in a display module. The pixel degradation compensation circuit may adjust the current degradation value to generate an adjusted degradation value corresponding to the current sub-pixel data. The adjusted degradation value is accumulated to a total degradation value corresponding to the current sub-pixel data. The pixel degradation compensation circuit compensates the current sub-pixel data based on the total degradation value corresponding to the current sub-pixel data so as to generate compensated current sub-pixel data to the display module.

公开(公告)号：US11495177B2

公开(公告)日：2022-11-08

申请号：US17368838

申请日：2021-07-07

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hui-Feng Lin ,  Yen-Tao Liao

IPC: G09G3/3233

Abstract: The present invention provides an image processing circuit for compensating image data for a display panel used for displaying first and second image patterns respectively having first and second current loadings. The image processing circuit is used for: receiving a first original image data of the first image pattern and a second original image data of the second image pattern having the same brightness value for a pixel at the same location; converting the first original image data into a first final image data to compensate for an IR drop according to the first current loading; and converting the second original image data into a second final image data to compensate for the IR drop according to the second current loading. The first final image data and the second final image data have substantially the same brightness value for the pixel at the same location.

公开(公告)号：US11056044B2

公开(公告)日：2021-07-06

申请号：US16258695

申请日：2019-01-28

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hsien-Po Huang ,  Yen-Tao Liao

IPC: G09G3/20

Abstract: A method of compensating pixel data for a display panel includes the steps of: receiving a first pixel data and a second pixel data respectively corresponding to two adjacent data lines of the display panel; generating a compensation pixel data by searching a lookup table based on the first pixel data and the second pixel data; and transmitting the compensation pixel data to one of the two adjacent data lines to be displayed on the display panel.

公开(公告)号：US10957236B2

公开(公告)日：2021-03-23

申请号：US16395247

申请日：2019-04-26

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yen-Tao Liao ,  Hung-Hsiang Chen ,  Jen-Ta Yang ,  Yi-Wei Lin ,  Huang-Chin Tang

IPC: G09G3/20

Abstract: The present invention discloses a driving method for a source driver, for driving a source line of a display panel. The driving method includes the steps of: driving the source line with a first voltage or a second voltage smaller than the first voltage in a first driving cycle; driving the source line with the first voltage in a second driving cycle next to the first driving cycle when the source line is driven with the first voltage in the first driving cycle; and driving the source line with an overdrive voltage in the second driving cycle when the source line is driven with the second voltage in the first driving cycle. The first voltage is a normal high voltage of the display panel, and the overdrive voltage is greater than the normal high voltage.