公开(公告)号：US11961493B2

公开(公告)日：2024-04-16

申请号：US17943296

申请日：2022-09-13

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jinho Lee ,  Seunghwan Park ,  Youngwoon Choi ,  Sungjae Park ,  Seungho Park ,  Kitae Yoon ,  Namjae Lim

IPC: G09G5/10 ,  G09G3/3233

CPC classification number: G09G5/10 ,  G09G2310/027 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2340/16 ,  G09G2360/16

Abstract: A display device including: a display panel including first through N-th pixel rows; and a panel driver configured to sequentially receive first through N-th line data for the first through the N-th pixel rows in each frame period, and to drive the display panel based on the first through the N-th line data, the panel driver including: a current control circuit configured to determine a current control value for a (K+1)-th pixel row based on the first through K-th line data for the first through K-th pixel rows received in a current frame period and (K+1)-th through the N-th line data for the (K+1)-th through the N-th pixel rows received in a previous frame period; and a data correction circuit configured to correct the (K+1)-th line data for the (K+1)-th pixel row based on the current control value in the current frame period.

公开(公告)号：US20230040791A1

公开(公告)日：2023-02-09

申请号：US17882612

申请日：2022-08-08

Applicant: Samsung Display Co., LTD.

Inventor： NAMJAE LIM ,  Sungjae Park ,  Seungho Park ,  Seunghwan Park ,  Jaehoon Lee ,  Jinho Lee ,  Youngwoon Choi

IPC: G09G3/3291 ,  G09G3/3266

Abstract: A display device includes a display panel, a luminance compensator, and a data driver. The display panel includes a plurality of pixels. The luminance compensator is configured to calculate a scaling factor based on a target current, a black image current, and a sensing current. The target current is calculated based on an input current input to the display panel. The sensing current is measured from the display panel. The data driver is configured to generate a data voltage based on input image data to supply the data voltage to the pixels. The data voltage has a voltage level adjusted based on the scaling factor.

公开(公告)号：US12277887B2

公开(公告)日：2025-04-15

申请号：US18085489

申请日：2022-12-20

Applicant: Samsung Display Co., Ltd.

Inventor： Huisu Kim ,  Seyun Kim ,  Hyungwoo Yim ,  Hakmo Choi ,  Seungho Park ,  Kyung-Sik Joo

IPC: G09G3/20 ,  G06T7/90

Abstract: A method of detecting a stain of a display panel is disclosed that includes capturing a first color image of the display panel, capturing a second color image of the display panel, generating a merged image by merging a color coordinate map of the first color image and a color coordinate map of the second color image, generating a background image of the merged image by a morphology filtering, generating a flattened image by operating the merged image and the background image and detecting an area of the flattened image in which a color coordinate value exceeds a threshold value as a stain area.

公开(公告)号：US11929014B2

公开(公告)日：2024-03-12

申请号：US17869218

申请日：2022-07-20

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Sung-Mo Yang ,  Seungho Park ,  Dae-Sik Lee

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0828 ,  G09G2320/0271 ,  G09G2330/021

Abstract: A display device includes a display panel which displays an image based on input image data, a driving controller which generates a voltage control signal for adjusting a first power voltage applied to the display panel in an (N+M)-th frame based on a maximum grayscale value of the input image data of an N-th frame, where N is a positive integer, and M is a positive integer, and a power voltage generator which senses a power current applied to the display panel in the (N+M)-th frame, generates a second power voltage based on the voltage control signal, and controls a voltage level of the first power voltage based on the second power voltage and a current level of the power current.

公开(公告)号：US11847978B2

公开(公告)日：2023-12-19

申请号：US17882612

申请日：2022-08-08

Applicant: Samsung Display Co., LTD.

Inventor： Namjae Lim ,  Sungjae Park ,  Seungho Park ,  Seunghwan Park ,  Jaehoon Lee ,  Jinho Lee ,  Youngwoon Choi

IPC: G09G3/3291 ,  G09G3/3266

CPC classification number: G09G3/3291 ,  G09G3/3266 ,  G09G2300/0842 ,  G09G2310/0272 ,  G09G2310/0278 ,  G09G2320/0233

Abstract: A display device includes a display panel, a luminance compensator, and a data driver. The display panel includes a plurality of pixels. The luminance compensator is configured to calculate a scaling factor based on a target current, a black image current, and a sensing current. The target current is calculated based on an input current input to the display panel. The sensing current is measured from the display panel. The data driver is configured to generate a data voltage based on input image data to supply the data voltage to the pixels. The data voltage has a voltage level adjusted based on the scaling factor.

公开(公告)号：US11776458B2

公开(公告)日：2023-10-03

申请号：US17895648

申请日：2022-08-25

Applicant: Samsung Display Co., Ltd.

Inventor： Wonwoo Jang ,  Seungho Park

IPC: G09G3/20 ,  G09G3/3208 ,  G06T7/13 ,  G09G3/30

CPC classification number: G09G3/2096 ,  G06T7/13 ,  G09G3/30 ,  G09G3/3208 ,  G09G2300/0452 ,  G09G2320/0233 ,  G09G2320/0242

Abstract: A display device includes a display panel and a driving circuit that receives an input image signal and provides an output image signal corresponding to the input image signal to the display panel. The driving circuit includes an edge and slope detector that detects an edge of the input image signal, and determines an angle between the edge and a virtual line parallel to a first direction, a weight calculator that determines a weight, based on the edge and the angle, and a rendering module that compensates for the input image signal, based on the weight, and outputs the output image signal. The weight is determined through an arithmetic operation between the edge and the angle.

公开(公告)号：US10733702B2

公开(公告)日：2020-08-04

申请号：US15917475

申请日：2018-03-09

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Shin Kim ,  Seungho Park

IPC: G06T3/40 ,  G09G3/3208

Abstract: A display device includes a display panel including a display panel including a plurality of pixels, a memory device configured to store pre-scaling data and compensation data, and a panel driver configured to generate first image data by performing a pre-scaling operation on input image data based on the pre-scaling data, generate second image data by performing a compensation operation on the input image data based on the compensation data, and provide a driving signal to the pixels to display a pre-scaled image corresponding to the first image data, or to display a compensated image corresponding to the second image data, wherein the pre-scaling operation is performed before the compensation operation is performed.

公开(公告)号：US20190279549A1

公开(公告)日：2019-09-12

申请号：US16292585

申请日：2019-03-05

Applicant: Samsung Display Co., Ltd.

Inventor： Jihye Shin ,  Seungho Park ,  Seonhaeng Kim

IPC: G09G3/20

Abstract: A method of performing image-adaptive tone mapping includes: determining a tone mapping curve based on a data signal corresponding to an image frame to be displayed on a display panel; determining whether a scene-change occurs between the image frame and a previous image frame by comparing the data signal with a previous data signal corresponding to the previous image frame; generating, in response to a determination that the scene-change does not occur, a final tone mapping curve based on the tone mapping curve and a previous tone mapping curve, which is applied to the previous image frame; determining, in response to a determination that the scene change occurs, the tone mapping curve as the final tone mapping curve; and performing a tone mapping by applying the final tone mapping curve to the image frame.

公开(公告)号：US12288529B2

公开(公告)日：2025-04-29

申请号：US18750577

申请日：2024-06-21

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Seungho Park ,  Sung-Mo Yang

IPC: G09G3/3275 ,  G09G3/32

Abstract: A driving controller includes an overcurrent load calculator calculating a load of an input image signal, comparing the load and a reference load, and outputting a first signal corresponding to a first comparison result, an overcurrent reference controller analyzing a grayscale of the input image signal and outputting one of a first reference current signal corresponding to the grayscale and a second reference current signal, whose current level is higher than that of the first reference current signal, as a reference current signal, a current sensor receiving a feedback current signal, comparing a current level of the feedback current signal and a current level of the reference current signal, and outputting a second signal corresponding to a second comparison result, and a voltage controller outputting a voltage control signal for adjusting a voltage level of a driving voltage, based on the first signal and the second signal.

公开(公告)号：US12165578B2

公开(公告)日：2024-12-10

申请号：US18367483

申请日：2023-09-13

Applicant: Samsung Display Co., Ltd.

Inventor： Jongman Kim ,  Sangmyeon Han ,  Byoungkwan An ,  Seungho Park ,  Namjae Lim ,  Joonhyeok Jeon

IPC: G09G3/3208

Abstract: A display driver includes a nonvolatile memory, an encoder, a decoder, and a compensator. The nonvolatile memory is configured to store accumulated stress data and compensation data corresponding to the accumulated stress data. The encoder is configured to encode the compensation data received from the nonvolatile memory to generate encoded compensation data. The decoder is configured to decode the encoded compensation data to generate decoded compensation data. The compensator is configured to process input image data based on the decoded compensation data and generate accumulated stress data.