公开(公告)号：US20220157250A1

公开(公告)日：2022-05-19

申请号：US17342585

申请日：2021-06-09

Applicant: Samsung Display Co., Ltd.

Inventor： TAEHOON KIM ,  SANGAN KWON ,  SOON-DONG KIM ,  HUI NAM ,  BONGHYUN YOU ,  CHANGNOH YOON ,  JAEKEUN LIM

IPC: G09G3/3266 ,  G09G3/3225

Abstract: Provided is a scan driver of a display device, and the scan driver includes a driving circuit and a masking circuit. The driving circuit includes a control circuit, a first output circuit, and a second output circuit. The control circuit outputs a first control signal and a second control signal. The first output circuit is connected to a first output terminal which outputs a first scan signal and a first voltage terminal and operates in response to a first control signal. The second output circuit is connected to a first output terminal and a second voltage terminal and operates in response to a second control signal. The masking circuit outputs a second scan signal to a second output terminal in response to the first control signal and the second control signal and is connected to an input terminal to which a masking signal is supplied.

公开(公告)号：US20220068202A1

公开(公告)日：2022-03-03

申请号：US17328392

申请日：2021-05-24

Applicant: Samsung Display Co., Ltd.

Inventor： SOON-DONG KIM ,  SANGAN KWON ,  TAEHOON KIM ,  HUI NAM ,  JUNHEYUNG JUNG

IPC: G09G3/3233 ,  G09G5/14

Abstract: A display apparatus includes a display panel including a pixel to display an image based on input image data, a driving controller which determines a driving frequency of a first display area of the display panel to be a first driving frequency and determines a driving frequency of a second display area of the display panel to be a second driving frequency less than the first driving frequency when the first display area displays a moving image and the second display area of the display panel displays a still image, and an emission driver which outputs a moving image emission signal corresponding to the first driving frequency and a still image emission signal corresponding to the second driving frequency to the display panel. A width of a non-emission period of the still image emission signal is greater than a width of a non-emission period of the moving image emission signal.

公开(公告)号：US20220068195A1

公开(公告)日：2022-03-03

申请号：US17228842

申请日：2021-04-13

Applicant: Samsung Display Co., Ltd.

Inventor： EUN SIL YUN ,  SANGAN KWON ,  SOON-DONG KIM ,  TAEHOON KIM ,  BONGHYUN YOU ,  CHANGNOH YOON

IPC: G09G3/32

Abstract: Provided is a display device including a display panel, a data driving circuit configured to drive a plurality of data lines, a scan driving circuit configured to drive a plurality of scan lines, and a driving controller configured to determine an operation mode based on an input signal, and configured to control the data driving circuit and the scan driving circuit in order to drive a first display region of the display panel at a first driving frequency and drive a second display region of the display panel at a second driving frequency while the operation mode is a multi-frequency mode, wherein the driving controller may change the operation mode to a compensation mode in which the second display region is periodically driven at the first driving frequency when the duration of the multi-frequency mode is greater than a reference time.

公开(公告)号：US20240404451A1

公开(公告)日：2024-12-05

申请号：US18585325

申请日：2024-02-23

Applicant: Samsung Display Co., LTD.

Inventor： JIHYE KIM ,  SANGAN KWON ,  SOON-DONG KIM ,  TAEHOON KIM ,  GEUNJEONG PARK ,  CHANGNOH YOON

IPC: G09G3/20 ,  G09G3/00 ,  G09G3/32

Abstract: A driving controller includes a compensation unit that receives an image signal corresponding to a first display area and a second display area, calculates stress data based on the image signal and previous stress data, and outputs an image data signal, which is obtained by compensating for the image signal based on the stress data, a memory that stores the stress data of a previous frame from the compensation unit and provides the previous stress data, and a multi-frequency compensation unit that receives a data enable signal, counts a number of consecutive masking enable frames when the data enable signal indicates a multi-frequency mode, calculates accumulated second stress data based on the number of the consecutive masking enable frames and second stress data, which corresponds to the second display area, from among the stress data from the memory, and stores the accumulated second stress data in the memory.

公开(公告)号：US20240371312A1

公开(公告)日：2024-11-07

申请号：US18418890

申请日：2024-01-22

Applicant: Samsung Display Co., LTD.

Inventor： TAEHOON KIM ,  SANGAN KWON ,  SOON-DONG KIM ,  GEUNJEONG PARK ,  CHANGNOH YOON ,  JAEKEUN LIM

IPC: G09G3/20 ,  G09G3/00 ,  G09G3/32

Abstract: A display panel driving circuit includes a scan driving circuit including a scan stage and a timing controller. The scan stage includes a first circuit connected to a first input node of receiving a first clock signal, a second circuit connected to a second input node of receiving a second clock signal, a third circuit connected to a third input node of receiving a carry signal, the first circuit, and the second circuit and connected to a first control node and a second control node, a pull-up transistor electrically connected to the first input node and an output node of outputting a scan signal and turned on/off by the first control node, and a pull-down transistor electrically connected to the output node and a low-level voltage line and turned on/off by the second control node.

公开(公告)号：US20240153455A1

公开(公告)日：2024-05-09

申请号：US18403199

申请日：2024-01-03

Applicant: Samsung Display Co., Ltd.

Inventor： SOON-DONG KIM ,  SANGAN KWON ,  TAEHOON KIM ,  HUI NAM ,  JUNHEYUNG JUNG

IPC: G09G3/3233 ,  G09G5/14

CPC classification number: G09G3/3233 ,  G09G5/14 ,  G09G3/3266

Abstract: A display apparatus includes a display panel including a pixel to display an image based on input image data, a driving controller which determines a driving frequency of a first display area of the display panel to be a first driving frequency and determines a driving frequency of a second display area of the display panel to be a second driving frequency less than the first driving frequency when the first display area displays a moving image and the second display area of the display panel displays a still image, and an emission driver which outputs a moving image emission signal corresponding to the first driving frequency and a still image emission signal corresponding to the second driving frequency to the display panel. A width of a non-emission period of the still image emission signal is greater than a width of a non-emission period of the moving image emission signal.

公开(公告)号：US20230419882A1

公开(公告)日：2023-12-28

申请号：US18142237

申请日：2023-05-02

Applicant: Samsung Display Co., LTD.

Inventor： JAEKEUN LIM ,  BON-SEOG GU ,  SANGAN KWON ,  SOON-DONG KIM ,  JINYOUNG ROH ,  HAE-KWAN SEO

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0852 ,  G09G2300/0819 ,  G09G2320/0233 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2310/0202

Abstract: A display device includes a display panel including a pixel including a pixel circuit and a light emitting element, a plurality of scan lines connected to the pixel circuit, an emission control line connected to the pixel circuit, and a data line connected to the pixel circuit. The pixel circuit includes a first capacitor connected to a first node and a second node opposite to the first node, a first circuit portion that includes a first transistor connected between the data line and the first node and a second transistor connected between the first transistor and the first node, and a second circuit portion connected to the second node and the light emitting element. Before the light emitting element emits light, a reference voltage is provided to a third node between the first transistor and the second transistor.

公开(公告)号：US20230178003A1

公开(公告)日：2023-06-08

申请号：US17890761

申请日：2022-08-18

Applicant: Samsung Display Co., Ltd.

Inventor： SOON-DONG KIM ,  SANGAN KWON ,  TAEHOON KIM ,  JIN-WOOK YANG

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/0267 ,  G09G2330/021

Abstract: A display device includes: a display panel including a plurality of pixels connected to a plurality of scan lines; a scan driving circuit, which drives the plurality of scan lines in synchronization with a clock signal; and a driving controller, which outputs the clock signal. While an operating mode is a multi-frequency mode, the driving controller comparts the display panel into a first display area and a second display area. A hold frame of the multi-frequency mode includes a first section during which the first display area is driven, and a second section during which the second display area is driven. The driving controller outputs the clock signal of a normal power mode during the first section and outputs the clock signal of a low-power mode during the second section.

公开(公告)号：US20230087545A1

公开(公告)日：2023-03-23

申请号：US17991197

申请日：2022-11-21

Applicant: Samsung Display Co., Ltd.

Inventor： CHANGNOH YOON ,  SOON-DONG KIM ,  SANGAN KWON ,  SEUNGJAE LEE ,  JUNHEYUNG JUNG

IPC: G09G3/3275 ,  G09G3/3266

Abstract: A display device includes a display panel including pixels connected to data lines and scan lines, a data driving circuit which drives the data lines, a scan driving circuit which drives the scan lines, and a driving controller divides the display panel into first and second display regions, controls the data driving circuit and the scan driving circuit to drive the first display region at a first driving frequency and to drive the second display region at a second driving frequency lower than the first driving frequency, and sets third driving frequencies respectively corresponding to horizontal lines in a boundary region, which is defined by a portion of the second display region adjacent to the first display region, during a multi-frequency mode. Each of the third driving frequencies has a frequency level between the first driving frequency and the second driving frequency.

公开(公告)号：US20250054440A1

公开(公告)日：2025-02-13

申请号：US18666151

申请日：2024-05-16

Applicant: Samsung Display Co., LTD.

Inventor： CHANGNOH YOON ,  SANGAN KWON ,  SOON-DONG KIM ,  JIHYE KIM ,  TAEHOON KIM ,  MIN-KYU PARK

IPC: G09G3/3208

Abstract: An electronic device includes a display panel that operates in a normal mode, a multi-frequency mode, or a refresh mode, a driving controller, and a host generating and outputting a luminance information. In the multi-frequency mode, a display area defined in the display panel is divided into a first display area and a second display area, and the driving controller controls the first display area and the second display area so as to operate at different frequencies. In the normal mode, the driving controller controls the display area so as to operate at a normal frequency. In the refresh mode, the driving controller controls the display area so as to operate at the normal frequency during one frame. When the luminance information changes, the display panel operates in the refresh mode.