公开(公告)号：US11705075B2

公开(公告)日：2023-07-18

申请号：US17872936

申请日：2022-07-25

Applicant: Samsung Display Co., Ltd.

Inventor： Young Soo Sohn ,  Jong Man Kim ,  Bong Gyun Kang ,  Jae Woo Ryu ,  Sung Mo Yang

IPC: G09G3/3291

CPC classification number: G09G3/3291 ,  G09G2310/027 ,  G09G2320/045

Abstract: A display device includes a display panel, a first memory, and a degradation compensator. The first memory device stores stress data including degradation values representing a degradation degree of each of the blocks in the display panel. The degradation compensator loads the stress data from the first memory device, updates the stress data based on current input data and a maximum degradation value, updates the maximum degradation value based on degradation values included in the updated stress data, and generate compensated data by compensating for the current input data based on the updated stress data. The degradation compensator determines whether a first degradation value included in the stress data is normal by comparing the first degradation value with the maximum degradation value, and updates the first degradation value based on at least one adjacent degradation value adjacent to the first degradation value, when the first degradation value is abnormal.

公开(公告)号：US11594167B2

公开(公告)日：2023-02-28

申请号：US17511859

申请日：2021-10-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Byeong Doo Kang ,  Jong Man Kim ,  Jae Woo Ryu ,  Yoon Sup Kim ,  Yoon Ju Kim

IPC: G09G3/20

Abstract: A driving method of a display device including a power source which supplies a power voltage to a power base line, and pixels connected to power branch lines commonly connected to the power base line, includes calculating a first scale factor based on input grayscales received during a first frame period; calculating first output grayscales by applying the first scale factor to first input grayscales received during a second frame period, where the second frame period is a frame period immediately next to the first frame period; displaying an image by at least a part of the pixels based on the first output grayscales; and providing a first current limiting signal to the power source and calculating a second scale factor smaller than the first scale factor when a current of the power base line exceeds a reference value.

公开(公告)号：US11205368B2

公开(公告)日：2021-12-21

申请号：US17008409

申请日：2020-08-31

Applicant: Samsung Display Co., Ltd.

Inventor： Jong Man Kim ,  Sang Su Han ,  Da Eun Kang ,  Jae Woo Ryu

IPC: G09G3/20

Abstract: A display device and a method of driving the same are described. The display device includes: an over driver to overdrive current frame data included in input image data to output overdriving frame data; a data driver to generate a data signal for the current frame data based on the overdriving frame data; and a display panel including a plurality of pixels to receive the data signal, the over driver may calculate a temporal change rate or a spatial change rate of the input image data, and output the overdriving frame data utilizing a reference formula having a first main parameter determined according to the calculated result. Therefore, overdriving may be performed dynamically according to the spatial change rate or the temporal change rate of the input image data.

公开(公告)号：US20220277683A1

公开(公告)日：2022-09-01

申请号：US17511859

申请日：2021-10-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Byeong Doo KANG ,  Jong Man Kim ,  Jae Woo Ryu ,  Yoon Sup Kim ,  Yoon Ju Kim

IPC: G09G3/20

Abstract: A driving method of a display device including a power source which supplies a power voltage to a power base line, and pixels connected to power branch lines commonly connected to the power base line, includes calculating a first scale factor based on input grayscales received during a first frame period; calculating first output grayscales by applying the first scale factor to first input grayscales received during a second frame period, where the second frame period is a frame period immediately next to the first frame period; displaying an image by at least a part of the pixels based on the first output grayscales; and providing a first current limiting signal to the power source and calculating a second scale factor smaller than the first scale factor when a current of the power base line exceeds a reference value.

公开(公告)号：US10861408B2

公开(公告)日：2020-12-08

申请号：US16259565

申请日：2019-01-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jong Man Kim ,  Dong Hyun Yeo ,  Byung Kil Jeon ,  Yong Bum Kim ,  Woo Jung Jung

IPC: G09G3/36 ,  G02F1/133

Abstract: A liquid crystal display device includes: a display panel including a plurality of pixels for displaying an image; a temperature sensor for sensing a temperature; an image data corrector for calculating correction parameters based on a grayscale change, calculating temperature parameters based on preset reference temperatures and the correction parameters, and correcting current image data to provide corrected image data based on the correction parameters and the temperature parameters; and a data driver for converting the corrected current image data into a data voltage and supplying the data voltage to the display panel. At least one of the correction parameters has a value that varies linearly with the sensed temperature and is based in part on the temperature parameters.

公开(公告)号：US11455935B2

公开(公告)日：2022-09-27

申请号：US17197982

申请日：2021-03-10

Applicant: Samsung Display Co., Ltd.

Inventor： Young Soo Sohn ,  Jong Man Kim ,  Sung Mo Yang ,  Seung Young Choi

IPC: G09G3/20

Abstract: A display device according to an embodiment includes a display panel including a plurality of pixels, and an image sticking compensator configured to generate a second image data by reflecting an age data accumulated in a first image data input from an external source. The image sticking compensator generates the age data by accumulating a deterioration data generated by reflecting a frequency weight corresponding to a determined frequency of a previous frame to an image data of the previous frame after the image data of the previous frame is stored.

公开(公告)号：US11062660B1

公开(公告)日：2021-07-13

申请号：US16942224

申请日：2020-07-29

Applicant: Samsung Display Co., Ltd.

Inventor： Young Soo Sohn ,  Jong Man Kim ,  Bong Gyun Kang ,  Jae Woo Ryu ,  Sung Mo Yang

IPC: G09G3/3291

Abstract: A display device includes a display panel, a first memory, and a degradation compensator. The first memory device stores stress data including degradation values representing a degradation degree of each of the blocks in the display panel. The degradation compensator loads the stress data from the first memory device, updates the stress data based on current input data and a maximum degradation value, updates the maximum degradation value based on degradation values included in the updated stress data, and generate compensated data by compensating for the current input data based on the updated stress data. The degradation compensator determines whether a first degradation value included in the stress data is normal by comparing the first degradation value with the maximum degradation value, and updates the first degradation value based on at least one adjacent degradation value adjacent to the first degradation value, when the first degradation value is abnormal.

公开(公告)号：US20190392777A1

公开(公告)日：2019-12-26

申请号：US16259565

申请日：2019-01-28

Applicant: Samsung Display Co., Ltd.

Inventor： Jong Man Kim ,  Dong Hyun Yeo ,  Byung Kil Jeon ,  Yong Bum Kim ,  Woo Jung Jung

IPC: G09G3/36 ,  G02F1/133

Abstract: A liquid crystal display device includes: a display panel including a plurality of pixels for displaying an image; a temperature sensor for sensing a temperature; an image data corrector for calculating correction parameters based on a grayscale change, calculating temperature parameters based on preset reference temperatures and the correction parameters, and correcting current image data to provide corrected image data based on the correction parameters and the temperature parameters; and a data driver for converting the corrected current image data into a data voltage and supplying the data voltage to the display panel. At least one of the correction parameters has a value that varies linearly with the sensed temperature and is based in part on the temperature parameters.