公开(公告)号：US20230117873A1

公开(公告)日：2023-04-20

申请号：US17863893

申请日：2022-07-13

Applicant: Samsung Display Co., Ltd.

Inventor： JIHYE KIM ,  YU-CHOL KIM ,  Seongoh YEOM ,  JAKYOUNG JIN

IPC: G09G3/32

Abstract: A display device includes a light-emitting device, a first transistor, and a second transistor connected between the first transistor and the light-emitting device and including a gate electrode which receives the emission control signal. When a driving frequency is a second frequency less than a first frequency, one frame includes an active period and a blank period, and during the active period, a pulse width of the emission control signal has a first value, and during the blank period, the pulse width of the emission control signal has a second value different from the first value.

公开(公告)号：US20240257720A1

公开(公告)日：2024-08-01

申请号：US18493977

申请日：2023-10-25

Applicant: Samsung Display Co., LTD.

Inventor： Seongoh YEOM ,  YU-CHOL KIM ,  JIHYE KIM ,  JIN-WOOK YANG ,  EUI-MYEONG CHO ,  JAKYOUNG JIN

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2360/16

Abstract: A luminance compensation method of a display device includes a first luminance for a reference grayscale at a first operating frequency and a second luminance for the reference grayscale at a second operating frequency are measured. A first reference value is calculated based on the first luminance and the second luminance, a first duty ratio of the initialization control signal is changed into a second duty ratio depending on a comparison result of the first reference value and a threshold value After the first duty ratio is changed into the second duty ratio, a third luminance for the reference grayscale is measured, and a second reference value is calculated based on the first luminance and the third luminance. A final duty ratio corresponding to the threshold value is calculated depending on a comparison result of the second reference value and the threshold value.

公开(公告)号：US20240153434A1

公开(公告)日：2024-05-09

申请号：US18239124

申请日：2023-08-29

Applicant: Samsung Display Co., Ltd.

Inventor： JIHYE KIM ,  YU-CHOL KIM ,  JIN-WOOK YANG ,  Seongoh YEOM ,  EUI-MYEONG CHO ,  JAKYOUNG JIN

IPC: G09G3/20

CPC classification number: G09G3/2096 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2310/0267 ,  G09G2320/0233

Abstract: Disclosed is a display device including a display panel including a pixel, a scan driver, and a driving controller that controls driving of the scan driver. The scan driver provides the pixel with a first mode scan signal having a first active period and a second active period in a first mode and provides the pixel with a second mode scan signal having a compensation active period in a second mode. The driving controller determines whether an operating frequency of the display device corresponds to one of predetermined compensation frequencies in a variable frequency mode, and operates the scan driver in the first mode or the second mode depending on a determination result of the determining.

公开(公告)号：US20240249661A1

公开(公告)日：2024-07-25

申请号：US18387293

申请日：2023-11-06

Applicant: Samsung Display Co., LTD.

Inventor： JAKYOUNG JIN ,  JIHYE KIM ,  YU-CHOL KIM ,  JIN-WOOK YANG ,  Seongoh YEOM ,  EUI-MYEONG CHO

IPC: G09G3/20 ,  G09G3/32

CPC classification number: G09G3/2096 ,  G09G3/32 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0294 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2330/028

Abstract: A display device includes a display panel including a plurality of pixels and a panel driver that drives the display panel in a first mode where an operating frequency is fixed, and a second mode where the operating frequency is variable. Each of the plurality of pixels includes a light-emitting element and a pixel driving circuit connected to a first electrode of the light-emitting element. The panel driver includes a driving controller that determines whether the operating frequency corresponds to one of predetermined compensation frequencies in the second mode, and outputs a voltage control signal depending on the determination result, and a voltage generator that changes a voltage level of an anode initialization voltage applied to the first electrode in response to the voltage control signal.

公开(公告)号：US20240203329A1

公开(公告)日：2024-06-20

申请号：US18588844

申请日：2024-02-27

Applicant: Samsung Display Co., Ltd.

Inventor： JIHYE KIM ,  YU-CHOL KIM ,  Seongoh YEOM ,  JAKYOUNG JIN

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0426 ,  G09G2300/0852 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2310/061

Abstract: A display device includes a light-emitting device, a first transistor, and a second transistor connected between the first transistor and the light-emitting device and including a gate electrode which receives the emission control signal. When a driving frequency is a second frequency less than a first frequency, one frame includes an active period and a blank period, and during the active period, a pulse width of the emission control signal has a first value, and during the blank period, the pulse width of the emission control signal has a second value different from the first value.