公开(公告)号：US20230005409A1

公开(公告)日：2023-01-05

申请号：US17940414

申请日：2022-09-08

Applicant: Samsung Display Co., Ltd.

Inventor： Suk Hun LEE ,  Sangan KWON ,  Hong Soo KIM ,  Jin Young ROH ,  Sehyuk PARK ,  Hyo Jin LEE

IPC: G09G3/20

Abstract: A display apparatus includes a display panel displaying an image based on an input image data, a data driver outputting a data voltage to a data line, and a driving controller determining a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage configured to store flicker values for grayscale values corresponding to the input image data, a voltage drop determiner configured to adjust a flicker value of the flicker values based on a voltage drop of the display panel, a still image determiner configured to determine whether the input image data is a still image or a video image, and a driving frequency determiner configured to determine the driving frequency of the display panel using the flicker value based on the input image data being the still image.

公开(公告)号：US20210056895A1

公开(公告)日：2021-02-25

申请号：US16943293

申请日：2020-07-30

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin LEE ,  Joon-Chul GOH ,  Sangan KWON ,  Hui NAM ,  Jin Young ROH ,  Sehyuk PARK

IPC: G09G3/325 ,  G09G3/3275

Abstract: A pixel circuit includes a main-circuit that controls an organic light-emitting element by controlling a driving current to flow into the organic light-emitting element and a sub-circuit including a first compensation transistor including a gate terminal which receives a first gate signal, a second compensation transistor including a gate terminal which receives a second gate signal, and an initialization transistor including a gate terminal which receives an initialization signal. Here, in a low-frequency driving mode, a driving frequency of the first gate signal is N hertz (Hz), a driving frequency of the initialization signal is N Hz, a driving frequency of the second gate signal is M Hz, the first compensation transistor and the initialization transistor are turned on during a first time duration in N non-light-emitting periods per second, and the second compensation transistor is turned on during a second time duration in M non-light-emitting periods per second.

公开(公告)号：US20210043143A1

公开(公告)日：2021-02-11

申请号：US16931509

申请日：2020-07-17

Applicant: Samsung Display Co., Ltd.

Inventor： HongSoo KIM ,  Sehyuk PARK ,  Sangan KWON ,  Jinyoung ROH ,  Sukhun LEE ,  Hyojin LEE ,  Junheyung JUNG

IPC: G09G3/3258 ,  G09G3/3291

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 the display panel. The data driver outputs a data voltage to the display panel. The driving controller selectively determines a driving mode of the display apparatus between one of a normal driving mode and a low frequency driving mode, and determines a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage storing flicker values for grayscale values of the input image data and a data remapper converting the grayscale value of the input image data to decrease a size of a maximum frequency grayscale area corresponding to a maximum driving frequency in the low frequency driving mode.

公开(公告)号：US20210027715A1

公开(公告)日：2021-01-28

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：US20210027686A1

公开(公告)日：2021-01-28

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：US20240312381A1

公开(公告)日：2024-09-19

申请号：US18674165

申请日：2024-05-24

Applicant: Samsung Display Co., LTD.

Inventor： Jinyoung ROH ,  HongSoo KIM ,  Sangan KWON ,  Sehyuk PARK ,  Hyo Jin LEE

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2310/0202 ,  G09G2310/0267 ,  G09G2310/027 ,  G09G2320/0247 ,  G09G2320/10 ,  G09G2330/023

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：US20210193054A1

公开(公告)日：2021-06-24

申请号：US17190962

申请日：2021-03-03

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan KWON ,  Hyojin LEE ,  Jinyoung ROH ,  Sehyuk PARK

IPC: 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：US20210049959A1

公开(公告)日：2021-02-18

申请号：US16932031

申请日：2020-07-17

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk PARK ,  Joon-Chul GOH ,  Sangan KWON ,  Jinyoung ROH ,  Hyojin LEE

IPC: G09G3/325 ,  G09G3/3275

Abstract: A pixel circuit includes: a main circuit including: a driving transistor that includes a gate terminal connected to a first node, a first terminal connected to a second node, and a second terminal connected to a third node; and an organic light-emitting element connected to the driving transistor and configured to control the organic light-emitting element by controlling a driving current corresponding to a data signal applied via a data line to flow into the organic light-emitting element; and a sub circuit including: a first compensation transistor that includes a gate terminal configured to receive a first gate signal, a first terminal connected to the first node, and a second terminal connected to a fourth node; and a second compensation transistor that includes a gate terminal configured to receive a second gate signal, a first terminal connected to the fourth node, and a second terminal connected to the third node.

公开(公告)号：US20210035505A1

公开(公告)日：2021-02-04

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: 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：US20200350389A1

公开(公告)日：2020-11-05

申请号：US16843637

申请日：2020-04-08

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin LEE ,  Jinyoung ROH ,  Sehyuk PARK ,  Sangan KWON ,  Hui NAM

IPC: H01L27/32 ,  G09G3/3291

Abstract: A display apparatus includes: a display panel configured to display an image based on input image data; a gate driver configured to output a gate signal to the display panel; a data driver configured to output a data voltage to the display panel; a driving controller configured to control an operation of the gate driver and an operation of the data driver, to determine a normal driving mode and a low frequency driving mode based on the input image data, and to determine a driving frequency of the display panel based on the input image data; and a touch driver configured to detect a touch event occurring on the display panel, and to output a touch interrupt signal representing the touch event to the driving controller.