公开(公告)号：US11282459B2

公开(公告)日：2022-03-22

申请号：US16914163

申请日：2020-06-26

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hyojin Lee ,  Sangan Kwon ,  Jinyoung Roh

IPC: G09G3/3258 ,  G09G3/3291

Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel displays an image based on input image data. The gate driver outputs a gate signal to a gate line of the display panel. The data driver outputs a data voltage to a data line of the display panel. The driving controller is configured to control an operation of the gate driver and an operation of the data driver, to determine a driving mode of the display apparatus among one of a normal driving mode and a low frequency driving mode, and to determine a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage configured to store flicker values for a part of grayscale values among all of grayscale values of the input image data.

公开(公告)号：US11176881B2

公开(公告)日：2021-11-16

申请号：US16921329

申请日：2020-07-06

Applicant: Samsung Display Co., Ltd.

Inventor： Jinyoung Roh ,  Sangan Kwon ,  Sehyuk Park ,  Hyojin Lee

IPC: G09G3/3233 ,  G09G3/3283 ,  G09G3/3266 ,  G09G3/20

Abstract: A display device includes a display panel and a panel driver configured to drive the display panel. The panel driver receives input image data corresponding to first, second, and third colors at an input frame frequency, and detects whether the input image data represent a still or dynamic image. If the input image data represent the dynamic image, the panel driver drives the display panel at a first output frame frequency substantially the same as the input frame frequency. If the input image data represent the still image, the panel driver calculates a plurality of flicker indexes of the still image for at least two of the first, second, third colors, one or more combinations of the first, second, and third colors, and drives the display panel at a second output frame frequency that is determined based on the plurality of flicker indexes.

公开(公告)号：US20200327846A1

公开(公告)日：2020-10-15

申请号：US16788647

申请日：2020-02-12

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hyojin Lee ,  Jinyoung Roh

IPC: G09G3/20

Abstract: A display device including a display panel including a plurality of pixels, and a driver configured to drive the display panel. The driver includes a dither configured to perform a dithering operation on image data including a plurality of pixel data for the plurality of pixels to generate dithered image data including a plurality of dithered pixel data respectively corresponding to the plurality of pixel data, and a still image detector configured to receive the dithered image data, to detect dither-irrelevant pixel data that are not changed from the plurality of pixel data by the dithering operation among the plurality of dithered pixel data, and to determine whether the dithered image data represent a still image by using the dither-irrelevant pixel data.

公开(公告)号：US11823607B2

公开(公告)日：2023-11-21

申请号：US17740290

申请日：2022-05-09

Applicant: Samsung Display Co., Ltd.

Inventor： Hyojin Lee ,  Sehyuk Park ,  Eunho Lee ,  Jinyoung Roh ,  Hui Nam ,  Bong-Hyun You

IPC: G09G3/3225 ,  G09G3/20

CPC classification number: G09G3/2007 ,  G09G3/3225 ,  G09G2320/0247 ,  G09G2330/021

Abstract: A driving controller of a display device, the controller including a segment divider configured to divide the image signal into a plurality of segments and define a predetermined number of adjacent segments among the plurality of segments as a segment block, an image signal adder configured to add up a gray scale value of the image signal of each of the predetermined number of adjacent segments and output the added-up gray scale values, an average gray scale calculator configured to receive the added-up gray scale values and output an average gray scale value, a correction circuit configured to output corrected added-up gray scale values obtained by adding a weight value to each of the added-up gray scale values on the basis of the average gray scale value, and a driving frequency determiner configured to determine the driving frequency of the display device on the basis of the corrected added-up gray scale values.

公开(公告)号：US11715419B2

公开(公告)日：2023-08-01

申请号：US17244095

申请日：2021-04-29

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hongsoo Kim ,  Jinyoung Roh ,  Hyojin Lee ,  Jaekeun Lim

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3283 ,  G09G3/36

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3283 ,  G09G3/3677 ,  G09G2310/08 ,  G09G2320/0626 ,  G09G2330/021

Abstract: A display device includes a display panel which defines first and second display areas, and includes pixels connected to data lines and scan lines, respectively, a data driving circuit which drives the data lines, a scan driving circuit which drives the scan lines, and a driving controller which receives an image signal and a control signal, control the data and scan driving circuits according to an operation mode, and output clock signals. In a multi-frequency mode, the scan driving circuit includes a first scan driving circuit corresponding to the first display area and a second scan driving circuit corresponding to the second display area. The second scan driving circuit sequentially drives first scan lines among scan lines corresponding to the second display area during a first frame, and sequentially drives second scan lines among scan lines corresponding to the second display area during a second frame.

公开(公告)号：US11705074B2

公开(公告)日：2023-07-18

申请号：US17539555

申请日：2021-12-01

Applicant: Samsung Display Co., Ltd.

Inventor： Woomi Bae ,  Hae-Kwan Seo ,  Youngha Sohn ,  Hyojin Lee ,  Jaekeun Lim

IPC: G09G3/3291 ,  G09G3/3233 ,  G09G3/3266

CPC classification number: G09G3/3291 ,  G09G3/3233 ,  G09G3/3266 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2360/16

Abstract: A display device includes a display panel that includes a first display area and a second display area, a data driving circuit which drives a plurality of data lines, a scan driving circuit which drives a plurality of scan lines, and a driving controller which controls the data driving circuit and the scan driving circuit such that the first display area is driven at a first driving frequency, and the second display area is driven at a second driving frequency lower than the first driving frequency during a multi-frequency mode, where the driving controller receives an image signal and provides to the data driving circuit an image data signal obtained by compensating for a gamma level of the image signal corresponding to the second display area during the multi-frequency mode.

公开(公告)号：US11551603B2

公开(公告)日：2023-01-10

申请号：US17212392

申请日：2021-03-25

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hongsoo Kim ,  Jinyoung Roh ,  Hyojin Lee ,  Jaekeun Lim

IPC: G09G3/20

Abstract: A display apparatus includes a display panel, a data driver and a frequency controller. The display panel displays an image based on an input image data. The data driver outputs a data voltage to the display panel. The frequency controller determines a driving frequency of the display panel based on the input image data and a play speed setting.

公开(公告)号：US11532279B2

公开(公告)日：2022-12-20

申请号：US17190962

申请日：2021-03-03

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan Kwon ,  Hyojin Lee ,  Jinyoung Roh ,  Sehyuk Park

IPC: G09G5/10 ,  G09G3/3275 ,  G09G3/3258 ,  G09G3/3233 ,  G09G3/20

Abstract: An OLED display device includes display panel and a panel driver. The panel driver receives input image data at an input frame frequency and determines whether the input image data represent a still image. When the input image data do not represent the still image, the panel driver drives the display panel at a first output frame frequency substantially equal to the input frame frequency. When the input image data represent the still image, the panel driver drives the display panel at a second output frame frequency lower than the input frame frequency for a low frequency driving time and drives the display panel at a third output frame frequency higher than the second output frame frequency for a high frequency insertion time determined by one of a panel characteristic of the display panel and a representative gray level of the input image data, after the low frequency driving time.

公开(公告)号：US11417268B2

公开(公告)日：2022-08-16

申请号：US17341323

申请日：2021-06-07

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sehyuk Park ,  Hyojin Lee ,  Hui Nam

IPC: G09G3/32

Abstract: A display device is capable of improving the image quality, the display device including: a display panel; a pixel on the display panel and including at least one light emitting element; a timing controller configured to receive an image data signal of the pixel and to compensate for a gray value of the image data signal based on the number of light emitting elements of the pixel to generate a compensated image data signal; and a data driver configured to select a compensation data signal corresponding to the compensated image data signal from the timing controller and to apply the compensation data signal to the pixel.

公开(公告)号：US11094258B2

公开(公告)日：2021-08-17

申请号：US16932031

申请日：2020-07-17

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Joon-Chul Goh ,  Sangan Kwon ,  Jinyoung Roh ,  Hyojin Lee

IPC: G09G3/325 ,  G09G3/3275

Abstract: A pixel circuit includes: a main circuit including: a driving transistor that includes a gate terminal connected to a first node, a first terminal connected to a second node, and a second terminal connected to a third node; and an organic light-emitting element connected to the driving transistor and configured to control the organic light-emitting element by controlling a driving current corresponding to a data signal applied via a data line to flow into the organic light-emitting element; and a sub circuit including: a first compensation transistor that includes a gate terminal configured to receive a first gate signal, a first terminal connected to the first node, and a second terminal connected to a fourth node; and a second compensation transistor that includes a gate terminal configured to receive a second gate signal, a first terminal connected to the fourth node, and a second terminal connected to the third node.