公开(公告)号：US11244633B2

公开(公告)日：2022-02-08

申请号：US16920322

申请日：2020-07-02

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Sangan Kwon ,  HongSoo Kim ,  Jinyoung Roh ,  Hyo Jin Lee

IPC: G09G3/3291

Abstract: A method of driving a display panel includes dividing an input image into a plurality of segments, generating a flicker value of a segment of the plurality of segments, determining whether to compensate the flicker value of the segment or not according to a segment size, compensating the flicker value of the segment based on the segment size, determining a frame rate of the display panel based on the flicker value of the segment and outputting a data voltage to the display panel in the frame rate. The flicker value of the segment is compensated based on the flicker value of the segment and flicker values of segments that are adjacent to the segment.

公开(公告)号：US11238810B2

公开(公告)日：2022-02-01

申请号：US16923477

申请日：2020-07-08

Applicant: Samsung Display Co., Ltd.

Inventor： HongSoo Kim ,  Sangan Kwon ,  Jinyoung Roh ,  Sehyuk Park ,  Sukhun Lee ,  Hyojin Lee

IPC: G09G3/3266 ,  G09G3/3275

Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel displays an image based on input image data. The gate driver outputs a gate signal to a gate line of the display panel. The data driver outputs a data voltage to a data line of the display panel. The driving controller controls operations of the gate driver and the data driver and drive a still image display area and a video image display area of a display area of the display panel in different driving frequencies. The driving controller includes a still image determiner which divides the input image data into a plurality of still image determining blocks, respectively determines whether the still image determining blocks represent a still image or a video image and determines a boundary between the still image display area and the video image display area.

公开(公告)号：US11195465B2

公开(公告)日：2021-12-07

申请号：US16737363

申请日：2020-01-08

Applicant: Samsung Display Co., Ltd.

Inventor： Hyojin Lee ,  Sehyuk Park ,  Jinyoung Roh ,  Geunjeong Park ,  Eunho Lee ,  Hui Nam ,  Bonghyun You

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3275 ,  H01L27/12

Abstract: A display device including: a display panel including a pixel connected to a first scan line, second scan line, and data line, the pixel including: a first switch connected to the first scan line; a second switch connected to the second scan line; and a light emitting element; a low-frequency driving controller to output a power control signal having a first level in a first mode and a second power control signal having a second level in a second mode; a scan driver including first and second scan drivers to drive the first and second scan lines, wherein one of the first and second scan drivers operates in the second mode; and a data driver to operate in the second mode in response to the power control signal having the second level, wherein the data driver operates at a frequency lower than a reference frequency in the second mode.

公开(公告)号：US11087665B2

公开(公告)日：2021-08-10

申请号：US16923355

申请日：2020-07-08

Applicant: Samsung Display Co., Ltd.

Inventor： Jinyoung Roh ,  HongSoo Kim ,  Sangan Kwon ,  Sehyuk Park ,  Hyo Jin Lee

IPC: G09G3/20

Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel including a gate line and a data line displays an image based on input image data. The gate driver outputs a gate signal to the gate line. The data driver outputs a data voltage to the data line. The driving controller includes an area divider dividing the input image data into first and second area data, a first variable frequency driver determining a first driving frequency of the first area data based on a flicker value according to a grayscale value and generating a first data signal of the first driving frequency and a second variable frequency driver determining a second driving frequency of the second area data based on a flicker value according to a grayscale value and generating a second data signal of the second driving frequency.

公开(公告)号：US10971077B2

公开(公告)日：2021-04-06

申请号：US16923008

申请日：2020-07-07

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan Kwon ,  Hyojin Lee ,  Jinyoung Roh ,  Sehyuk Park

IPC: G09G5/10 ,  G09G3/3275 ,  G09G3/3258 ,  G09G3/3233 ,  G09G3/20

Abstract: An OLED display device includes display panel and a panel driver. The panel driver receives input image data at an input frame frequency and determines whether the input image data represent a still image. When the input image data do not represent the still image, the panel driver drives the display panel at a first output frame frequency substantially equal to the input frame frequency. When the input image data represent the still image, the panel driver drives the display panel at a second output frame frequency lower than the input frame frequency for a low frequency driving time and drives the display panel at a third output frame frequency higher than the second output frame frequency for a high frequency insertion time determined by one of a panel characteristic of the display panel and a representative gray level of the input image data, after the low frequency driving time.

公开(公告)号：US12300153B2

公开(公告)日：2025-05-13

申请号：US18120627

申请日：2023-03-13

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Donggyu Lee ,  Jae-Hyeon Jeon ,  Jin-Wook Yang

IPC: G09G3/32

Abstract: A display device includes a display panel including a pixel which receives a luminance control voltage, a driving controller which receives an input image signal and a control signal and provides an output image signal to the display panel, and a voltage generator which generates the luminance control voltage in response to a voltage control signal from the driving controller. The driving controller determines a current operating frequency based on the control signal, and outputs the voltage control signal based on a difference value between the current operating frequency and a previous operating frequency and an operating time of the previous operating frequency when the current operating frequency is different from the previous operating frequency, where the luminance control voltage is changed from a first voltage level to a second voltage level based on the voltage control signal.

公开(公告)号：US12283222B2

公开(公告)日：2025-04-22

申请号：US18118414

申请日：2023-03-07

Applicant: Samsung Display Co., Ltd.

Inventor： Jae-Hyeon Jeon ,  Sehyuk Park ,  Youngha Sohn ,  Jin-Wook Yang ,  Donggyu Lee

IPC: G09G3/32

Abstract: A display device includes a display panel including a pixel and a driving controller to drive the display panel. The driving controller generates a compensating signal, when a first driving frequency of a first frame is determined as being higher than a second driving frequency of a second frame by comparing a first cycle count value of the first frame with a second cycle count value of the second frame subsequent to the first frame.

公开(公告)号：US12165594B2

公开(公告)日：2024-12-10

申请号：US18196659

申请日：2023-05-12

Applicant: Samsung Display Co., LTD.

Inventor： Donggyu Lee ,  Hongsoo Kim ,  Sehyuk Park ,  Youngha Sohn ,  Jin-Wook Yang ,  Jae-Hyeon Jeon

IPC: G09G3/3258 ,  G09G3/3233

Abstract: An electronic device includes a display panel which includes a plurality of pixels and displays an image at each of multiple frames, a driving circuit which drives the multiple frames at multiple operating frequencies, a voltage generator which provides a voltage to the display panel, and a drive controller. The drive controller includes a representative frequency calculator which calculates a representative frequency, based on operating frequencies of ‘n’ number of frames before one frame of the multiple frames, and a compensating signal calculator which outputs a compensating signal, based on the representative frequency and a count number in the one frame. The drive controller transmits the compensating signal to the voltage generator, the voltage includes a reference voltage, the voltage generator generates the reference voltage based on the compensating signal, and the voltage generator provides the reference voltage to each of the plurality of pixels.

公开(公告)号：US11823607B2

公开(公告)日：2023-11-21

申请号：US17740290

申请日：2022-05-09

Applicant: Samsung Display Co., Ltd.

Inventor： Hyojin Lee ,  Sehyuk Park ,  Eunho Lee ,  Jinyoung Roh ,  Hui Nam ,  Bong-Hyun You

IPC: G09G3/3225 ,  G09G3/20

CPC classification number: G09G3/2007 ,  G09G3/3225 ,  G09G2320/0247 ,  G09G2330/021

Abstract: A driving controller of a display device, the controller including a segment divider configured to divide the image signal into a plurality of segments and define a predetermined number of adjacent segments among the plurality of segments as a segment block, an image signal adder configured to add up a gray scale value of the image signal of each of the predetermined number of adjacent segments and output the added-up gray scale values, an average gray scale calculator configured to receive the added-up gray scale values and output an average gray scale value, a correction circuit configured to output corrected added-up gray scale values obtained by adding a weight value to each of the added-up gray scale values on the basis of the average gray scale value, and a driving frequency determiner configured to determine the driving frequency of the display device on the basis of the corrected added-up gray scale values.

公开(公告)号：US11715419B2

公开(公告)日：2023-08-01

申请号：US17244095

申请日：2021-04-29

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hongsoo Kim ,  Jinyoung Roh ,  Hyojin Lee ,  Jaekeun Lim

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3283 ,  G09G3/36

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3283 ,  G09G3/3677 ,  G09G2310/08 ,  G09G2320/0626 ,  G09G2330/021

Abstract: A display device includes a display panel which defines first and second display areas, and includes pixels connected to data lines and scan lines, respectively, a data driving circuit which drives the data lines, a scan driving circuit which drives the scan lines, and a driving controller which receives an image signal and a control signal, control the data and scan driving circuits according to an operation mode, and output clock signals. In a multi-frequency mode, the scan driving circuit includes a first scan driving circuit corresponding to the first display area and a second scan driving circuit corresponding to the second display area. The second scan driving circuit sequentially drives first scan lines among scan lines corresponding to the second display area during a first frame, and sequentially drives second scan lines among scan lines corresponding to the second display area during a second frame.