公开(公告)号：US11869445B2

公开(公告)日：2024-01-09

申请号：US17864762

申请日：2022-07-14

Applicant: SAMSUNG DISPLAY CO., LTD.

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

IPC: G09G3/3275 ,  G09G3/3266

CPC classification number: G09G3/3275 ,  G09G3/3266 ,  G09G2310/0278

Abstract: A display device includes a display panel, a data driver, a scan driver, and a driving controller. The display panel includes a first display area and a second display area, which operate at different frequencies from each other in a multi-frequency mode. The driving controller controls the data driver and the scan driver. The driving controller generates boundary compensation data by compensating for boundary image signals, which are input to correspond to a boundary area of the first display area in the multi-frequency mode and drives the data driver based on a compensation image signal including the boundary compensation data.

公开(公告)号：US11538421B2

公开(公告)日：2022-12-27

申请号：US16824377

申请日：2020-03-19

Applicant: Samsung Display Co., Ltd.

Inventor： Hongsoo Kim ,  Sehyuk Park ,  Hyo Jin Lee ,  Sangan Kwon ,  Jinyoung Roh ,  Sukhun Lee ,  Jun Heyung Jung

IPC: G09G3/3291

Abstract: A display device includes display device includes: a display panel including a plurality of pixels; a data driver configured to generate data voltages based on output image data, and to provide the data voltages to the plurality of pixels; and a controller configured to receive input image data and input frequency information from a host processor, and to provide the output image data to the data driver, wherein the controller includes an adaptive refresh block configured to: determine a target frequency by analyzing the input image data; determine a masking ratio based on an input frequency represented by the input frequency information and the target frequency; and selectively output the input image data as the output image data by performing a masking operation on the input image data with the masking ratio.

公开(公告)号：US11514866B2

公开(公告)日：2022-11-29

申请号：US17358083

申请日：2021-06-25

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan Kwon ,  Soon-Dong Kim ,  Taehoon Kim ,  Hui Nam ,  Junhee Moon ,  Eun Sil Yun ,  Changnoh Yoon

IPC: G09G3/3275 ,  G09G3/3266

Abstract: Provided is a display device. The display device includes a display panel that includes a first display region and a second display region, 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 control the data driving circuit and the scan driving circuit so as to operate the first display region and the second display region at different frequencies when an operation mode is a multi-frequency mode, wherein the driving controller changes the operation mode to a normal mode when a difference between an image signal of a current frame of the first display region and an image signal of a previous frame of the first display region is equal to or greater than a reference value during the multi-frequency mode.

公开(公告)号：US11462169B2

公开(公告)日：2022-10-04

申请号：US17307969

申请日：2021-05-04

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Sangan Kwon ,  Jin Young Roh ,  Sehyuk Park

IPC: G09G3/3258 ,  G09G3/3233

Abstract: A pixel of a display device includes a capacitor; a light emitting diode; and first, second, third, and fourth transistors. The display device has a normal frequency mode and a low frequency mode. Two electrodes of the capacitor are respectively connected to a first voltage source and a gate node. A gate electrode of the first transistor is connected to the gate node. In a hold period in the low frequency mode, both the second and third transistors receive a scan signal, the third transistor diode-connects the first transistor, the fourth transistor receives an initialization signal and transfers an initialization voltage to the gate node, the scan signal is at a first off voltage level, and the initialization signal is at a second off voltage level unequal to the first off voltage level. The cathode of the light emitting diode is connected to a second voltage source.

公开(公告)号：US11423846B2

公开(公告)日：2022-08-23

申请号：US17240111

申请日：2021-04-26

Applicant: Samsung Display Co., Ltd.

Inventor： Changnoh Yoon ,  Sangan Kwon ,  Soon-Dong Kim ,  Taehoon Kim ,  Hui Nam ,  Eun Sil Yun ,  Seungjae Lee

IPC: G09G3/3275 ,  G09G3/3266

Abstract: A display device includes a display panel, a data driving circuit which drives a plurality of data lines, a scan driving circuit which drives a plurality of scan lines, and a driving controller which controls the data driving circuit and the scan driving circuit such that the display panel is divided into a first display region and a second display region during a multi-frequency mode and the first display region and the second display region are respectively operated at different frequencies, where the driving controller changes an operation mode to a normal mode when a still image and a moving image are simultaneously displayed in the first display region during the multi-frequency mode and the duration of the still image reaches a predetermined time.

公开(公告)号：US11386852B2

公开(公告)日：2022-07-12

申请号：US16922906

申请日：2020-07-07

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Joon-Chul Goh ,  Sangan Kwon ,  HongSoo Kim ,  Hui Nam ,  Jinyoung Roh ,  Hyojin Lee

IPC: G09G3/36 ,  G09G3/3291 ,  G09G3/3266

Abstract: A display device includes a display panel including a first partial panel region and a second partial panel region, and a panel driver configured to drive the display panel. The panel driver determines a first driving frequency for the first partial panel region and a second driving frequency for the second partial panel region. When the first driving frequency and the second driving frequency are different from each other, the panel driver sets a boundary portion including a boundary between the first partial panel region and the second partial panel region, and determines a third driving frequency for the boundary portion to be between the first driving frequency and the second driving frequency.

公开(公告)号：US11315457B2

公开(公告)日：2022-04-26

申请号：US17231388

申请日：2021-04-15

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan Kwon ,  Jinoh Kwag ,  Soon-Dong Kim ,  Taehoon Kim ,  Hui Nam ,  Bonghyun You ,  Eun Sil Yun ,  Changnoh Yoon

IPC: G09G3/00 ,  G09G3/3275 ,  G09G3/3266 ,  G09G5/14 ,  G09G3/3233

Abstract: A display device includes a driving controller which provides a first start signal and a second start signal corresponding to an operation mode to a scan driving circuit. The scan driving circuit includes a first scan driving circuit having first dummy driving stages and first driving stages which sequentially drive scan lines corresponding to a first display region among a plurality of scan lines in synchronization with the first start signal and a second scan driving circuit having second dummy driving stages and second driving stages which sequentially drive scan lines corresponding to a second display region among the plurality of scan lines in synchronization with the second start signal. The first dummy driving stages are disposed on a first side surface of the display panel and the second dummy driving stages are disposed on a second side surface of the display panel.

公开(公告)号：US11257435B2

公开(公告)日：2022-02-22

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: G09G5/10 ,  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：US20210383763A1

公开(公告)日：2021-12-09

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：US20210110771A1

公开(公告)日：2021-04-15

申请号：US16868463

申请日：2020-05-06

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Sangan Kwon ,  Jin Young Roh ,  Sehyuk Park

IPC: G09G3/3258

Abstract: A pixel of a display device includes a capacitor; a light emitting diode; and first, second, third, and fourth transistors. The display device has a normal frequency mode and a low frequency mode. Two electrodes of the capacitor are respectively connected to a first voltage source and a gate node. A gate electrode of the first transistor is connected to the gate node. In a hold period in the low frequency mode, both the second and third transistors receive a scan signal, the third transistor diode-connects the first transistor, the fourth transistor receives an initialization signal and transfers an initialization voltage to the gate node, the scan signal is at a first off voltage level, and the initialization signal is at a second off voltage level unequal to the first off voltage level. The cathode of the light emitting diode is connected to a second voltage source.