公开(公告)号：US20240135893A1

公开(公告)日：2024-04-25

申请号：US18143829

申请日：2023-05-04

Applicant: Samsung Display Co., LTD.

Inventor： SEOKHA HONG ,  JONG-WOONG PARK

IPC: G09G3/36 ,  G09G3/3291

CPC classification number: G09G3/3607 ,  G09G3/3291 ,  G09G2320/0666 ,  G09G2360/147

Abstract: A method of compensating for degradation of a display device includes: determining a reference region including a part of a first display region and a second display region having pixel structures from each other; determining first stress data of first pixels based on a first average luminance value of the first pixels disposed on the part of the first display region; determining second stress data of second pixels based on a second average luminance value of the second pixels disposed on a central region of the second display region; determining third stress data of third pixels based on a third average luminance value of the third pixels disposed on an outer region of the second display region; compensating for degradation of the second pixels based on the first and second stress data, and compensating for degradation of the third pixels based on the first and third stress data.

公开(公告)号：US20220108667A1

公开(公告)日：2022-04-07

申请号：US17493097

申请日：2021-10-04

Applicant: Samsung Display Co., Ltd.

Inventor： JONG-WOONG PARK ,  SUK HOON KU ,  Seok Jeong SONG

IPC: G09G5/10 ,  G09G3/3275

Abstract: A data compensation circuit includes a reference frame memory device which stores reference frame data, an accumulated stress memory device which stores cumulative stress data for each of pixels, a stress data generating block which compares output image data with the reference frame data to generate stress data for each of the pixels, a memory control block which adds the stress data to the cumulative stress data to update the cumulative stress data and a compensating block which generates the output image data by generating afterimage compensation data for each of the pixels based on the cumulative stress data and compensating input image data based on the afterimage compensation data.

公开(公告)号：US20240105127A1

公开(公告)日：2024-03-28

申请号：US18354241

申请日：2023-07-18

Applicant: Samsung Display Co., LTD.

Inventor： JONG-WOONG PARK ,  WONJU SHIN ,  BYUNG KI CHUN ,  KANGHEE LEE

IPC: G09G3/3291 ,  G09G3/20

CPC classification number: G09G3/3291 ,  G09G3/2007 ,  G09G3/2096 ,  G09G2320/045 ,  G09G2330/021 ,  G09G2330/028 ,  G09G2330/12 ,  G09G2360/12 ,  G09G2360/16

Abstract: A display apparatus includes a display panel, a driving controller, and a data driver. The driving controller generates a data signal based on input image data. The data driver converts the data signal into a data voltage and outputs the data voltage to the display panel. The driving controller includes a deterioration compensator. The deterioration compensator generates an alpha value based on a ratio between a sensed current read from a portion of the display panel applied with a high power voltage or a portion of the display panel applied with a low power voltage and a predicted current calculated from the input image data and generates the data signal using the input image data, a stress value of a pixel, and the alpha value.

公开(公告)号：US20190333438A1

公开(公告)日：2019-10-31

申请号：US16508519

申请日：2019-07-11

Applicant: Samsung Display Co., Ltd.

Inventor： JEONGEUN KIM ,  JONG-WOONG PARK

IPC: G09G3/20

Abstract: A display device includes a display panel including a plurality of pixels, the display panel having an active region in which an image is displayed and an inactive region adjacent to the active region, an image processor setting image data of the inactive region to dummy data, and performing a rendering operation for a boundary pixel of the plurality of pixels based on the dummy data to generate output image data, the boundary pixel located in the active region and adjacent to the inactive region, and a panel driver providing a driving signal to the display panel to display the image corresponding to the output image data.

公开(公告)号：US20250104601A1

公开(公告)日：2025-03-27

申请号：US18651869

申请日：2024-05-01

Applicant: Samsung Display Co., LTD.

Inventor： HYEONMIN KIM ,  YUNKI BAEK ,  JONG-WOONG PARK ,  HYE-SANG PARK ,  SOOYEON LEE ,  WONBOK LEE

IPC: G09G3/20 ,  G09G3/3208

Abstract: In a method of compressing stress data in a display device, the stress data is divided into block stress data for a pixel block, a plurality of compressed codes are generated by encoding the block stress data in a plurality of encoding modes, it is determined whether the plurality of encoding modes are available encoding modes for the block stress data based on code lengths of the plurality of compressed codes and a number of available bits for the pixel block, a final encoding mode is selected among the available encoding modes based on quantization values of the available encoding modes, and a compressed bitstream for the pixel block is generated based on a compressed code corresponding to the final encoding mode among the plurality of compressed codes.

公开(公告)号：US20240371331A1

公开(公告)日：2024-11-07

申请号：US18638001

申请日：2024-04-17

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： JUNHAN KO ,  MITSURU FUJII ,  SEOKYOUNG YOON ,  JONG-WOONG PARK

IPC: G09G3/3291 ,  G09G3/32

Abstract: A display device includes a display panel, a control circuit, and a data driving circuit. The display panel displays an image based on data voltages, and includes a display area divided into a plurality of blocks. The control circuit receives input image data, determines a boot-up area among the blocks when the input image data is a moving image, and generates output image data by increasing low-grayscale values lower than a threshold grayscale among input grayscale values of the input image data in the boot-up area. The data driving circuit generates the data voltages based on the output image data.

公开(公告)号：US20240233664A9

公开(公告)日：2024-07-11

申请号：US18143829

申请日：2023-05-05

Applicant: Samsung Display Co., LTD.

Inventor： SEOKHA HONG ,  JONG-WOONG PARK

IPC: G09G3/36 ,  G09G3/3291

CPC classification number: G09G3/3607 ,  G09G3/3291 ,  G09G2320/0666 ,  G09G2360/147

Abstract: A method of compensating for degradation of a display device includes: determining a reference region including a part of a first display region and a second display region having pixel structures from each other; determining first stress data of first pixels based on a first average luminance value of the first pixels disposed on the part of the first display region; determining second stress data of second pixels based on a second average luminance value of the second pixels disposed on a central region of the second display region; determining third stress data of third pixels based on a third average luminance value of the third pixels disposed on an outer region of the second display region; compensating for degradation of the second pixels based on the first and second stress data, and compensating for degradation of the third pixels based on the first and third stress data.

公开(公告)号：US20250124851A1

公开(公告)日：2025-04-17

申请号：US18650399

申请日：2024-04-30

Applicant: Samsung Display Co., LTD.

Inventor： SEOKHA HONG ,  HYUNGJIN KIM ,  JONG-WOONG PARK ,  KANGHEE LEE ,  KYUNGSU LEE

IPC: G09G3/32

Abstract: A display device includes: a display panel, and a driving controller to receive an image signal and a control signal, drive the first display region of the display panel at a first driving frequency, and drive the second display region at a second driving frequency. The driving controller counts a first stress time of each of the first horizontal lines, and calculates a first operating time of each of the first horizontal lines based on the first stress time and the first driving frequency, counts a second stress time of each of the second horizontal lines and calculates a second operating time of each of the second horizontal lines based on the second stress time and the second driving frequency, and outputs an image data signal obtained by compensating for stress for the image signal based on the image signal, the first operating time, and the second operating time.

公开(公告)号：US20230282154A1

公开(公告)日：2023-09-07

申请号：US17986115

申请日：2022-11-14

Applicant: Samsung Display Co., Ltd.

Inventor： YOUNGSOO SOHN ,  JONG-WOONG PARK ,  SeokJeong SONG ,  JIYEON BAIK

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2330/021

Abstract: A driving controller includes a compensator that calculates a compensation value based on first accumulated stress, and outputs an output image signal by compensating for the input image signal with the compensation value, a stress converter that converts the output image signal into current stress in response to an enable signal, an accumulation stress calculator that outputs second accumulated stress by adding the first accumulated stress and the current stress in response to the enable signal, a memory that stores the second accumulated stress and provides the first accumulated stress to the compensator and the accumulation stress calculator, and an operating time calculator that receives a current operating frequency and outputs the enable signal of an active level based on the current operating frequency.

公开(公告)号：US20220398961A1

公开(公告)日：2022-12-15

申请号：US17708546

申请日：2022-03-30

Applicant: Samsung Display Co., Ltd.

Inventor： KYUNGSU LEE ,  JONG-WOONG PARK ,  WONJU SHIN ,  JUNHAN KO

IPC: G09G3/20

Abstract: An electronic device includes a main processor that provides an image signal and an image-sticking correction signal, and a display module that receives the image signal and the image-sticking correction signal and outputs an image data signal obtained by compensating for the image signal. The display module includes a compensation circuit that calculates cumulative stress based on the image data signal and outputs an image-sticking compensation signal and a compensation adjuster that outputs the image data signal obtained by correcting the image signal based on the image-sticking correction signal and the image-sticking compensation signal. The image-sticking correction signal is input by a user manipulation.