公开(公告)号：US12073756B2

公开(公告)日：2024-08-27

申请号：US18102803

申请日：2023-01-30

Applicant: Samsung Display Co., Ltd.

Inventor： Sungjae Park ,  Seunghwan Park ,  Jinho Lee ,  Namjae Lim ,  Kyung-Sik Joo

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G2320/0233 ,  G09G2320/0673 ,  G09G2320/0686 ,  G09G2340/0435 ,  G09G2360/145

Abstract: A method of compensating for luminance of a display device includes determining position compensation values of each of panel blocks for measurement grayscale values based on a difference between luminance of a reference panel block and luminance of the each of the panel blocks for the measurement grayscale values, generating a first gamma curve for a first driving frequency and the position compensation values of the each of the panel blocks for the measurement grayscale values, generating a second gamma curve for a second driving frequency and the luminance of the panel blocks for the measurement grayscale values at the first driving frequency, and compensating for input image data based on the first gamma curve and the second gamma curve.

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：US12142217B2

公开(公告)日：2024-11-12

申请号：US18451371

申请日：2023-08-17

Applicant: SAMSUNG DISPLAY CO., LTD.

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

IPC: G09G3/3233 ,  G09G3/20

Abstract: A display device includes a display panel including a plurality of pixels, a current sensor that senses a sensing current that flows through the pixels, and a data compensator. The data compensator calculates a target current from an image frame of input image data using a current deviation for each position of the image frame and a current contribution ratio for each color of the image frame, and that generates a scale factor by comparing the target current and the sensing current. The display device further includes a timing controller that generates output image data by scaling grayscale values of the input image data using the scale factor; and a data driver that provides a data signal corresponding to the output image data to the pixels.

公开(公告)号：US11948492B2

公开(公告)日：2024-04-02

申请号：US17879350

申请日：2022-08-02

Applicant: Samsung Display Co., Ltd.

Inventor： Jinho Lee ,  Sungjae Park ,  Seunghwan Park ,  Namjae Lim ,  Youngwoon Choi ,  Jong Wook Kim

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G2310/027 ,  G09G2320/041

Abstract: A display device includes a display panel and a display panel driver. The display panel includes pixels. The display panel driver determines an average image load of input image data, determines an operation mode based on a grayscale value of the input image data and the average image load as a first operation mode or a second operation mode, applies a first scale factor to the input image data in the first operation mode, applies a second scale factor different from the first scale factor to the input image data in the second operation mode, and drives the display panel.

公开(公告)号：US12183253B2

公开(公告)日：2024-12-31

申请号：US17990171

申请日：2022-11-18

Applicant: Samsung Display Co., Ltd.

Inventor： Sungjae Park ,  Seunghwan Park ,  Namjae Lim ,  Youngwoon Choi ,  Sung-Mo Yang ,  Jinho Lee

IPC: G09G3/20

Abstract: A display apparatus includes: a display panel; a driving controller, which receives input image data including a plurality of normal image frames and a plurality of black image frames, receives a flag indicating a type of each of frames included in the input image data, generates intermediate image data by adjusting a grayscale of the input image data based on the input image data and the flag, and generates a data signal based on the intermediate image data where the type includes a normal image frame and a black image frame; and a data driver, which generates a data voltage based on the data signal and outputs the data voltage to the display panel.

公开(公告)号：US12087207B2

公开(公告)日：2024-09-10

申请号：US17823182

申请日：2022-08-30

Applicant: SAMSUNG DISPLAY CO., LTD.

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

IPC: G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/2096 ,  G09G3/2007 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2330/021 ,  G09G2330/028

Abstract: A display device includes a display panel, a driving controller, and a voltage generator. The display panel includes a plurality of pixels. Each of the pixels receives a driving voltage through a first voltage line. The driving controller receives an input image signal including first to third color signals and outputs a voltage control signal for controlling a voltage level of the driving voltage based on the first to third color signals. The voltage generator provides the driving voltage to the first voltage line and determines the voltage level of the driving voltage based on the voltage control signal. The driving controller determines first to third gate-source voltages respectively corresponding to the first to third color signals and outputs the voltage control signal based on the first to third gate-source voltages.

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：US11817031B2

公开(公告)日：2023-11-14

申请号：US17940429

申请日：2022-09-08

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/20 ,  G09G3/3225 ,  G09G3/3275 ,  G09G3/36

CPC classification number: G09G3/2044 ,  G09G3/2051 ,  G09G3/2055 ,  G09G3/3225 ,  G09G3/3275 ,  G09G3/3685 ,  G09G2310/027 ,  G09G2310/0278 ,  G09G2320/0247 ,  G09G2320/0271 ,  G09G2340/0435 ,  G09G2360/16

Abstract: A display device includes: a display panel including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, respectively; a scan driver, which provides a scan signal to the pixels through the scan lines; a data driver, which provides a data voltage to the pixels through the data lines; and a controller, which controls the scan driver and the data driver, and receives input image data at a variable input frame frequency. The controller determines whether a gray scale value of the input image data is included in any range of a first gray scale range and a second gray scale range different from the first gray scale range, and dithers the input image data when it is determined that the gray scale value of the input image data is included the first gray scale range.

公开(公告)号：US11763745B2

公开(公告)日：2023-09-19

申请号：US17937543

申请日：2022-10-03

Applicant: SAMSUNG DISPLAY CO., LTD.

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

IPC: G09G3/3233 ,  G09G3/20

CPC classification number: G09G3/3233 ,  G09G3/2007 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/027 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0242 ,  G09G2320/041 ,  G09G2320/0666

Abstract: A display device includes a display panel including a plurality of pixels, a current sensor that senses a sensing current that flows through the pixels, and a data compensator. The data compensator calculates a target current from an image frame of input image data using a current deviation for each position of the image frame and a current contribution ratio for each color of the image frame, and that generates a scale factor by comparing the target current and the sensing current. The display device further includes a timing controller that generates output image data by scaling grayscale values of the input image data using the scale factor; and a data driver that provides a data signal corresponding to the output image data to the pixels.