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：US11632046B2

公开(公告)日：2023-04-18

申请号：US17827862

申请日：2022-05-30

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim ,  Jung-taek Kim ,  Joon Suk Baik ,  Sang Su Han ,  Jae Woo Ryu ,  Myung Ho Lee

IPC: H02M3/156 ,  H03F3/14

Abstract: A power voltage generator includes a booster, a voltage sensor, a constant voltage controller and a constant current controller. The booster is configured to boost an input voltage to an output voltage based on an on-off operation of a switch. The voltage sensor is configured to generate a sensing voltage by sensing the output voltage. The constant voltage controller is configured to generate a first switching signal to control the switch by comparing the sensing voltage with a reference voltage. The constant current controller is configured to generate a gain based on a ratio of an electrode signal of the switch and a target signal by comparing the electrode signal of the switch with the target signal.

公开(公告)号：US10997883B2

公开(公告)日：2021-05-04

申请号：US16408595

申请日：2019-05-10

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Da Eun Kang ,  Jae Woo Ryu

IPC: G09G3/00 ,  G09G3/3225 ,  G09G3/3275

Abstract: A crack detector may include a plurality of crack detection switches for connecting and disconnecting data lines of a display panel to one another. A signal supply may supply a detection control signal for controlling opening/closing of the crack detection switches and supply a crack detection signal to a first data line. A crack determiner may be configured to determine a crack of the display panel by comparing an output signal supplied from a second data line connected to the first data line through one of the crack detection switches, with a preset reference value.

公开(公告)号：US12112682B2

公开(公告)日：2024-10-08

申请号：US17895623

申请日：2022-08-25

Applicant: Samsung Display Co., Ltd.

Inventor： Seongjun Kim ,  Youngsoo Sohn ,  Jae Woo Ryu ,  Kwan-Young Oh ,  Seungyoung Choi

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G2310/027

Abstract: A display apparatus includes a display panel, a driving controller, a gate driver and a data driver. The driving controller is configured to insert a compensation image to first image data including a normal image to generate second image data. The gate driver is configured to shift an output time of a gate signal and to output the gate signal having a shifted output time to the display panel. The data driver is configured to generate a data voltage based on the second image data and to output the data voltage to the display panel. A gate shift amount when the compensation image is applied is substantially the same as a gate shift amount immediately before the compensation image is applied.

公开(公告)号：US11574591B2

公开(公告)日：2023-02-07

申请号：US17381134

申请日：2021-07-20

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Myeong Su Kim ,  Jae Woo Ryu

IPC: G09G3/3233 ,  G09G3/3275 ,  G09G3/3266

Abstract: A display device includes pixels connected to scan lines, sensing lines, readout lines, and data lines; a scan driver including stages to supply a scan signal and a sensing signal to the scan lines and the sensing lines; a data driver which supplies a data signal to the data lines; a timing controller which divides one frame into an active period including a scan period in which the data signal is supplied to the data lines and a display period in which the pixels emit light in response to the data signal, and a blank period including a sensing period in which electrical characteristics of the pixels are detected and a reset period in which the stages are reset; and a compensator which generates a compensation value for compensating for deterioration of the pixels based on sensing values provided from the readout lines during the sensing period.

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：US10984718B2

公开(公告)日：2021-04-20

申请号：US16541822

申请日：2019-08-15

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Joon Suk Baik ,  Jae Woo Ryu ,  Myung Ho Lee ,  Sang Su Han

IPC: G09G3/3258 ,  G09G3/20

Abstract: A display device may include pixels coupled to scan lines and data lines, at least one scan driver for supplying a scan signal to the pixels through the scan lines, and a data driver for supplying a data signal and a bias signal to the pixels through the data lines. The pixels are supplied with the data signal when the scan signal is supplied during display periods, and are supplied with the bias signal when the scan signal is supplied during a bias period between the display periods. By the bias signal, a bias voltage is supplied to first group pixels that emit light with a preset grayscale during the display periods.

公开(公告)号：US12062339B2

公开(公告)日：2024-08-13

申请号：US18369439

申请日：2023-09-18

Applicant: Samsung Display Co., Ltd.

Inventor： Jung-Taek Kim ,  Byeong-Doo Kang ,  Jae Woo Ryu ,  Joonsuk Baik ,  Sekeun Lee

IPC: G09G3/3266 ,  G09G3/3275

CPC classification number: G09G3/3266 ,  G09G3/3275 ,  G09G2300/0842 ,  G09G2310/0278 ,  G09G2310/0294 ,  G09G2310/061

Abstract: In a display device, each of pixels includes a light emitting element and a pixel circuit which is connected to the light emitting element at a first node and drives the light emitting element in response to a corresponding driving scan signal among driving scan signals during a display period. The pixel circuit is connected to a corresponding readout line among readout lines at a second node. The sensing circuit senses a potential of the first node through the corresponding readout line during a blank period, and each of frames includes the display period and the blank period. At least two driving scan signals among the driving scan signals respectively include a plurality of rewriting periods, each of which is activated during the blank period corresponding thereto, and the rewriting periods of the driving scan signals have different durations from each other.

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：US20220262295A1

公开(公告)日：2022-08-18

申请号：US17485771

申请日：2021-09-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jung Taek KIM ,  Jae Woo Ryu ,  Joon Suk Baik ,  Se Keun Lee

IPC: G09G3/20

Abstract: A display device includes a plurality of pixels, a power supply, a voltmeter, and a timing controller. The power supply is configured to generate an initialization voltage to be supplied to a sensing pixel among the pixels. The voltmeter is configured to measure a first value of the initialization voltage supplied to the sensing pixel during an active period of a frame period and a second value of the initialization voltage supplied to the sensing pixel during a vertical blank period of the frame period. The timing controller is configured to generate rewrite image data that is supplied to the sensing pixel during the vertical blank period. The rewrite image data is generated from image data applied to the pixels during the active period and a difference between the first and second values.