公开(公告)号：US20210005130A1

公开(公告)日：2021-01-07

申请号：US16828726

申请日：2020-03-24

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/20 ,  G09G5/393

Abstract: A display driver includes a still image detector configured to receive a compressed image bitstream at an input frame frequency from a host processor, and to detect a still image by comparing the compressed image bitstream of a current frame and the compressed image bitstream of a previous frame, a driving frequency changer configured to output the compressed image bitstream at a first output frame frequency equal to the input frame frequency when the still image is not detected, and to output the compressed image bitstream at a second output frame frequency lower than the input frame frequency when the still image is detected, and a decoder configured to generate original image data at the first output frame frequency and the second output frame 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：US20220343826A1

公开(公告)日：2022-10-27

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: G09G3/20 ,  G09G3/3225

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：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：US20210049949A1

公开(公告)日：2021-02-18

申请号：US16943170

申请日：2020-07-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jin LEE ,  Jae Keun LIM ,  Hong Soo KIM ,  Jinyoung ROH ,  Sehyuk PARK

IPC: G09G3/20

Abstract: A display apparatus including: a display panel configured to display an image based on input image data; a data driver configured to output a data voltage to the display panel; and a driving controller configured to determine a driving frequency of the display panel based on flicker values for grayscale values of the input image data and output a driving frequency signal representing the driving frequency of the display panel to a host.

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.

公开(公告)号：US20220059034A1

公开(公告)日：2022-02-24

申请号：US17515742

申请日：2021-11-01

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

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：US20210343245A1

公开(公告)日：2021-11-04

申请号：US17379929

申请日：2021-07-19

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3291

Abstract: A display apparatus includes a display panel, a gate driver, a data driver and an emission driver. The display panel includes a pixel. The gate driver outputs a data write gate signal having a corresponding active level and a data initialization gate signal having a corresponding active level to the pixel in a writing frame, outputs the data write gate signal not having the corresponding active level and the data initialization gate signal not having the corresponding active level to the pixel in a holding frame and outputs the data write gate signal having the corresponding active level and the data initialization gate signal not having the corresponding active level to the pixel in a writing compensation frame. The data driver outputs a data voltage to the pixel. The emission driver outputs an emission signal to the pixel.