公开(公告)号：US11436985B2

公开(公告)日：2022-09-06

申请号：US17315449

申请日：2021-05-10

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/3291 ,  G09G3/20

Abstract: A display apparatus includes a display panel including pixels, a gate driver applying a gate signal to a gate line, a data driver applying a data voltage to a data line and a driving controller determining a mode of an input image data to a moving image mode or a static image mode according to whether the input image data is a moving image or a static image, driving the display panel in a moving image driving frequency in the moving image mode and in a static image driving frequency in the static image mode, operating the gate driver in an alternate driving mode such that the gate driver scans a first group of the gate lines in a first duration and a second group of the gate lines in a second duration and inserting a compensation frame to scan all of the gate lines when an image transition is occurred in the static image mode.

公开(公告)号：US11386852B2

公开(公告)日：2022-07-12

申请号：US16922906

申请日：2020-07-07

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Joon-Chul Goh ,  Sangan Kwon ,  HongSoo Kim ,  Hui Nam ,  Jinyoung Roh ,  Hyojin Lee

IPC: G09G3/36 ,  G09G3/3291 ,  G09G3/3266

Abstract: A display device includes a display panel including a first partial panel region and a second partial panel region, and a panel driver configured to drive the display panel. The panel driver determines a first driving frequency for the first partial panel region and a second driving frequency for the second partial panel region. When the first driving frequency and the second driving frequency are different from each other, the panel driver sets a boundary portion including a boundary between the first partial panel region and the second partial panel region, and determines a third driving frequency for the boundary portion to be between the first driving frequency and the second driving frequency.

公开(公告)号：US11328649B2

公开(公告)日：2022-05-10

申请号：US16717907

申请日：2019-12-17

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/20 ,  G09G3/3225

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：US11257435B2

公开(公告)日：2022-02-22

申请号：US16931509

申请日：2020-07-17

Applicant: Samsung Display Co., Ltd.

Inventor： HongSoo Kim ,  Sehyuk Park ,  Sangan Kwon ,  Jinyoung Roh ,  Sukhun Lee ,  Hyojin Lee ,  Junheyung Jung

IPC: G09G5/10 ,  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 the display panel. The data driver outputs a data voltage to the display panel. The driving controller selectively determines a driving mode of the display apparatus between one of a normal driving mode and a low frequency driving mode, and determines a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage storing flicker values for grayscale values of the input image data and a data remapper converting the grayscale value of the input image data to decrease a size of a maximum frequency grayscale area corresponding to a maximum driving frequency in the low frequency driving mode.

公开(公告)号：US11170693B2

公开(公告)日：2021-11-09

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：US11170688B2

公开(公告)日：2021-11-09

申请号：US16027798

申请日：2018-07-05

Applicant: Samsung Display Co., Ltd.

Inventor： Hongsoo Kim ,  Sehyuk Park

IPC: G09G3/20 ,  G09G3/34 ,  G09G3/3208 ,  G09G3/3233

Abstract: A method of driving a display panel including a plurality of pixels, each of which outputs different color lights corresponding to voltage ranges to which a driving voltage applied thereto belongs, includes dividing one image frame into first through third sub-frames, outputting a first color image displayed by a first color by applying a first driving voltage belonging to a first voltage range to the pixels in the first sub-frame, outputting a second color image displayed by a second color by applying a second driving voltage belonging to a second voltage range to the pixels in the second sub-frame, and outputting a third color image displayed by a third color by applying a third driving voltage belonging to a third voltage range to the pixels in the third sub-frame.

公开(公告)号：US11037507B2

公开(公告)日：2021-06-15

申请号：US16721564

申请日：2019-12-19

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/3275

Abstract: A display device includes: a display panel including a plurality of pixels; and a driving controller configured to: generate a data signal corresponding to an input image data; generate a data voltage based on the data signal; and output the data voltage to the pixels, wherein the driving controller is configured to output the data signal in at least one driving frequency higher than a predetermined low frequency during an image transition period in a low frequency driving mode during which the data signal outputs in the low frequency.

公开(公告)号：US11030939B2

公开(公告)日：2021-06-08

申请号：US16383436

申请日：2019-04-12

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：US20210110771A1

公开(公告)日：2021-04-15

申请号：US16868463

申请日：2020-05-06

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Sangan Kwon ,  Jin Young Roh ,  Sehyuk Park

IPC: G09G3/3258

Abstract: A pixel of a display device includes a capacitor; a light emitting diode; and first, second, third, and fourth transistors. The display device has a normal frequency mode and a low frequency mode. Two electrodes of the capacitor are respectively connected to a first voltage source and a gate node. A gate electrode of the first transistor is connected to the gate node. In a hold period in the low frequency mode, both the second and third transistors receive a scan signal, the third transistor diode-connects the first transistor, the fourth transistor receives an initialization signal and transfers an initialization voltage to the gate node, the scan signal is at a first off voltage level, and the initialization signal is at a second off voltage level unequal to the first off voltage level. The cathode of the light emitting diode is connected to a second voltage source.

公开(公告)号：US12165599B2

公开(公告)日：2024-12-10

申请号：US18407362

申请日：2024-01-08

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/3266 ,  G09G3/3275

Abstract: A display apparatus includes a display panel, a gate driver, a data driver, a driving controller and a power voltage generator. The display panel displays an image based on input image data. The gate driver outputs a gate signal to a gate line. The data driver outputs a data voltage to a data line. The driving controller drives display areas of the display panel in different driving frequencies. The power voltage generator outputs a data power voltage to the data driver. The driving controller outputs an output data enable signal including a writing period having an active signal and a holding period having an inactive signal for the respective display areas. The power voltage generator generates the data power voltage having a high power voltage level during the writing period and a low power voltage level in at least a portion of the holding period.