公开(公告)号：US11798463B2

公开(公告)日：2023-10-24

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: G09G3/3266 ,  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：US11508313B2

公开(公告)日：2022-11-22

申请号：US17326570

申请日：2021-05-21

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：US11495181B2

公开(公告)日：2022-11-08

申请号：US17317071

申请日：2021-05-11

Applicant: Samsung Display Co., Ltd.

Inventor： Soon-Dong Kim ,  Sangan Kwon ,  Changnoh Yoon ,  Seungjae Lee

IPC: G09G3/3291 ,  G09G3/3266

Abstract: The display device includes a display panel in which a first display area and a second display area adjacent to the first display area are defined, a data driving circuit which drives the plurality of data lines, a scan driving circuit which drives the plurality of scan lines, and a driving controller which receives an image signal and a control signal, and controls the data driving circuit and the scan driving circuit based on an operation mode, where the driving controller includes a luminance deviation compensation unit which compensates for luminance deviation of the first display area and the second display area when the operation mode is a multi-frequency mode in which the first display area is driven at a first frequency and the second display area is driven at a second frequency different from the first frequency.

公开(公告)号：US11475838B2

公开(公告)日：2022-10-18

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 ,  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：US11423843B2

公开(公告)日：2022-08-23

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：US11367400B2

公开(公告)日：2022-06-21

申请号：US17217373

申请日：2021-03-30

Applicant: Samsung Display Co., Ltd.

Inventor： Taehoon Kim ,  Soon-Dong Kim ,  Changnoh Yoon ,  Sangan Kwon ,  Eun Sil Yun

IPC: G09G3/3266 ,  G09G3/3275 ,  G09G3/3233

Abstract: A display device includes a display panel including a first image unit and a second image unit, a data driver which applies data voltages to the display panel, a first scan driver which applies write scan signals to the display panel, a second scan driver which applies compensation scan signals and initialization scan signals to the display panel, and a masking part connected to the second scan driver and which selectively applies the initialization scan signals to the second image unit.

公开(公告)号：US11302269B2

公开(公告)日：2022-04-12

申请号：US17237197

申请日：2021-04-22

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kyunho Kim ,  Sangan Kwon ,  Yong-Jin Shin ,  Joonsuk Baik

IPC: G09G3/3291 ,  H01L27/32

Abstract: An organic light emitting diode (OLED) display includes pixel rows, and a panel driver configured to drive the display panel. The panel driver includes a determining circuit configured to select one pixel row from the plurality of pixel rows, to determine load data based on input image data for the one pixel row, and to determine target mobility data corresponding to the load data, a sensing circuit configured to generate mobility sensing data corresponding to mobility values of driving transistors of a plurality of pixels included in the one pixel row by performing a mobility sensing operation on the one pixel row, and a current control circuit configured to compare the mobility sensing data and the target mobility data to generate a result, and to adjust a panel current flowing through the display panel according to the result.

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：US11120715B2

公开(公告)日：2021-09-14

申请号：US16853391

申请日：2020-04-20

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan Kwon ,  Kyunho Kim ,  Sungjin Kim ,  Subin Park ,  Yeseul Lee

IPC: G09G3/00 ,  G09G3/20

Abstract: A method of obtaining overdriving data includes providing a first data voltage corresponding to a current line reference gray level to a second pixel for first and second data writing times for first and second pixels in a first frame, measuring first luminance based on the first data voltage, applying a second data voltage corresponding to a previous line reference gray level for the first data writing time in a second frame, providing a third data voltage of an overdriving voltage corresponding to a predicted overdriving gray level added to the first data voltage for the second data writing time in the second frame, measuring second luminance based on the third data voltage, and determining an overdriving value corresponding to a reference gray level pair of the current and the previous line reference gray level as the predicted overdriving gray level when the first and second luminance are the same.