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：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.

公开(公告)号：US10600359B2

公开(公告)日：2020-03-24

申请号：US15839497

申请日：2017-12-12

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Seungho Park ,  Baekwoon Lee

IPC: G09G3/30 ,  G09G3/3208 ,  G09G3/20 ,  G09G3/10 ,  H01L51/56 ,  H01L27/32

Abstract: An organic light emitting display apparatus includes a first data line, a comparator, and a data generator. The first data line is connected to a first pixel. The comparator compares first image data of input image data to at least one of a first critical grayscale value or a second critical grayscale value, where the first image data corresponds to the first pixel. The data generator determines the first critical grayscale value or the second critical grayscale value as first corrected image data when the first image data is equal to or greater than the first critical grayscale value but lower than the second critical grayscale value.

公开(公告)号：US09870732B2

公开(公告)日：2018-01-16

申请号：US14922357

申请日：2015-10-26

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Seungho Park ,  Baekwoon Lee

IPC: G09G5/02 ,  G09G3/3208 ,  G09G3/20

CPC classification number: G09G3/3208 ,  G09G3/2055 ,  G09G2320/0233 ,  G09G2320/0247

Abstract: An organic light emitting display apparatus includes a first data line, a comparator, and a data generator. The first data line is connected to a first pixel. The comparator compares first image data of input image data to at least one of a first critical grayscale value or a second critical grayscale value, where the first image data corresponds to the first pixel. The data generator determines the first critical grayscale value or the second critical grayscale value as first corrected image data when the first image data is equal to or greater than the first critical grayscale value but lower than the second critical grayscale value.

公开(公告)号：US12260819B2

公开(公告)日：2025-03-25

申请号：US18213898

申请日：2023-06-26

Applicant: Samsung Display Co., Ltd.

Inventor： Namjae Lim ,  Seokgyu Ban ,  Sangmyeon Han ,  Seungho Park ,  Byoungkwan An

IPC: G09G3/3233 ,  G09G3/20

Abstract: A display device includes a display unit which includes a plurality of pixels, a degradation controller which includes a voltage compensator configured to calculate a driving voltage increase amount based on a degradation amount of a maximum degradation pixel among the pixels and a global current controller configured to calculate calculates a first scale factor for compensating a power increase amount according to the driving voltage increase amount, a driving voltage provider which is configured to increase a driving voltage provided to the pixels based on the driving voltage increase amount, a data compensator which is configured to generate output image data by scaling the first scale factor to grayscale values of input image data, and a data driver which is configured to provide data voltages to the pixels based on the output image data.

公开(公告)号：US12236572B2

公开(公告)日：2025-02-25

申请号：US18596017

申请日：2024-03-05

Applicant: Samsung Display Co., Ltd.

Inventor： Mingyu Kim ,  Seyun Kim ,  Seungho Park ,  Hyungwoo Yim

IPC: G06T7/00 ,  G09G3/20

Abstract: An inspection system for inspecting a display device including pixels includes a camera for capturing the display device and providing a sensing image signal and an inspection device for receiving the sensing image signal and outputting a compensation signal for compensating for luminance of a defective pixel. The inspection device includes an image detector outputting a sensing input signal corresponding to the sensing image signal, a defect coordinate detector detecting the defective pixel based on the sensing input signal and outputting defect coordinates indicating a position of the defective pixel, an image analyzer analyzing consistency of the defect coordinates based on the sensing image signal and the sensing input signal and outputting final coordinates, and a defect compensation calculator outputting a compensation signal for adjusting luminance of compensation pixels adjacent to the defective pixel from among the pixels based on the final coordinates.

公开(公告)号：US12080249B2

公开(公告)日：2024-09-03

申请号：US17443606

申请日：2021-07-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sangmyeon Han ,  Seungho Park ,  Byoungkwan An ,  Jaehoon Lee

IPC: G09G3/3291 ,  H10K59/121

CPC classification number: G09G3/3291 ,  H10K59/1213 ,  H10K59/1216 ,  G09G2310/027 ,  G09G2320/0257

Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The display panel includes a pixel. The driving controller generates an age compensation value using a sensed age generated based on sensing data of the pixel and an accumulated age generated based on accumulated grayscale values of input image data, generates a final age based on the age compensation value, and compensates a grayscale value of the input image data based on a final age to generate a data signal. The data driver converts the data signal to a data voltage and outputs the data voltage to the display panel.