公开(公告)号：US11922869B2

公开(公告)日：2024-03-05

申请号：US17983462

申请日：2022-11-09

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sunghoon Bang ,  Seokgyu Ban ,  Dong-Ki Eun ,  Seungho Park ,  Wook Lee

IPC: G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2310/061 ,  G09G2320/0257 ,  G09G2320/0271 ,  G09G2320/041

Abstract: A display device including: a display panel including a plurality of pixels; a display panel driver configured to drive the display panel; a memory device configured to store a reference current-temperature model that is set for the display panel, a global offset of the display panel, which is calculated based on the reference current-temperature model in a manufacturing stage of the display panel, and a local offset of the display panel, which is calculated based on a characteristic difference between the pixels in the manufacturing stage; and a panel temperature determiner configured to measure sensing currents flowing through the pixels when a temperature sensing voltage is applied to the pixels, calculate correction sensing currents by applying the global offset and the local offset to the sensing currents, and determine temperatures of the pixels by substituting the correction sensing currents into the reference current-temperature model.

公开(公告)号：US11676543B2

公开(公告)日：2023-06-13

申请号：US17326684

申请日：2021-05-21

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Wonwoo Jang ,  Seungho Park ,  Kyoungho Lim

IPC: G09G3/3275

CPC classification number: G09G3/3275 ,  G09G2310/027 ,  G09G2360/16

Abstract: A display device includes a display panel, a controller, and a data driver. The display panel includes a plurality of pixels. The controller detects a logo region including a logo in image data, determines a correction gain based on a first average gray level of the logo region and a second average gray level of a peripheral region adjacent to the logo region, and generates corrected image data by correcting the image data based on the correction gain. The data driver provides data signals to the plurality of pixels based on the corrected image data.

公开(公告)号：US20190026861A1

公开(公告)日：2019-01-24

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

CPC classification number: G06T3/4007 ,  G06T3/40 ,  G09G3/3208 ,  G09G2320/0257 ,  G09G2320/0285 ,  G09G2320/045 ,  G09G2340/04

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：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：US11087692B2

公开(公告)日：2021-08-10

申请号：US16237814

申请日：2019-01-02

Applicant: Samsung Display Co., Ltd.

Inventor： Seungho Park ,  Miyoung Joo

IPC: G09G3/3283 ,  H01L27/32 ,  G09G3/3225 ,  G09G3/20

Abstract: A method of driving a display panel includes: grouping m adjacent pixels, which output same color light, into one pixel-group in the display panel, where m is an integer greater than or equal to two; determining whether a unit grayscale (UG) to be implemented by the pixel-group is greater than or equal to a determined reference grayscale (REFG) by analyzing respective data signals applied to the pixel-group; performing, in response to the UG being greater than or equal to the REFG, a normal driving that implements the UG by controlling all of the m adjacent pixels to emit light with first luminance corresponding to the respective data signals; and performing, in response to the UG being less than the REFG, a combination driving that implements the UG by controlling only a portion of the m adjacent pixels to emit light with second luminance that is greater than the first luminance.

公开(公告)号：US10664959B2

公开(公告)日：2020-05-26

申请号：US16286062

申请日：2019-02-26

Applicant: Samsung Display Co., Ltd.

Inventor： Jihye Shin ,  Seonhaeng Kim ,  Seungho Park

IPC: G06T5/00 ,  G09G5/10 ,  G09G3/20

Abstract: A method of performing an image-adaptive tone-mapping for a display device including performing a first tone-mapping on an image frame by applying a first tone-mapping function to respective non-target display blocks, and performing a second tone-mapping on the image frame by applying a second tone-mapping function obtained by applying a local weighted value to the first tone-mapping function to respective target display blocks.