公开(公告)号：US20250069555A1

公开(公告)日：2025-02-27

申请号：US18789355

申请日：2024-07-30

Applicant: LG Display Co., Ltd.

Inventor： Byeongchul KIM ,  Dongsup SIM

IPC: G09G3/3266 ,  G09G3/3233

Abstract: Disclosed is a display device that reduces a flicker phenomenon that occurs in a low-speed operation in a Variable Refresh Rate (VRR) mode by tuning a bias voltage based on a refresh rate and supplying the tuned bias voltage to a display panel. The display device includes a display panel including a plurality of pixels; and a power supply for supplying a bias voltage and an anode reset voltage to the plurality of pixels, wherein when the display device operates in a VRR mode, the display device is configured to adjust at least one of a level and an application time of the bias voltage based on a refresh rate in an anode reset frame.

公开(公告)号：US20230215364A1

公开(公告)日：2023-07-06

申请号：US18068927

申请日：2022-12-20

Applicant: LG Display Co., Ltd.

Inventor： Hyunkyo LIM ,  Dongsup SIM

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/0626

Abstract: A display device includes a display panel including a plurality of pixels connected to a data line and a gate line; a data driver configured to apply a data voltage to the data line for an active period and to apply a parking voltage to the data line for a blank period for which the data voltage is not applied; a gate driver for applying a scan signal to the gate line; a light-emission signal generator for applying a light-emission signal to the plurality of pixels; and a controller configured to operate the display device based on a plurality of bands, wherein the plurality of bands have different highest target luminance levels based on operating environments of the display device, wherein in at least one of the plurality of bands, a duty ratio of the light-emission signal is smaller than a duty ratio of the parking voltage. Thus, parking voltage mura is reduced and uniformity of the display panel is improved to improve image quality.

公开(公告)号：US20240242673A1

公开(公告)日：2024-07-18

申请号：US18619029

申请日：2024-03-27

Applicant: LG Display Co., Ltd.

Inventor： Hyunkyo LIM ,  Dongsup SIM

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/0626

Abstract: A display device includes a display panel including a plurality of pixels connected to a data line and a gate line; a data driver configured to apply a data voltage to the data line for an active period and to apply a parking voltage to the data line for a blank period for which the data voltage is not applied; a gate driver for applying a scan signal to the gate line; a light-emission signal generator for applying a light-emission signal to the plurality of pixels; and a controller configured to operate the display device based on a plurality of bands, wherein the plurality of bands have different highest target luminance levels based on operating environments of the display device, wherein in at least one of the plurality of bands, a duty ratio of the light-emission signal is smaller than a duty ratio of the parking voltage. Thus, parking voltage mura is reduced and uniformity of the display panel is improved to improve image quality.

公开(公告)号：US20240242672A1

公开(公告)日：2024-07-18

申请号：US18525426

申请日：2023-11-30

Applicant: LG Display Co., Ltd.

Inventor： Byeongchul KIM ,  Dongsup SIM

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0452 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/0242 ,  G09G2320/041 ,  G09G2330/021

Abstract: A display device in one example includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, where each of the first sub-pixel, the second sub-pixel, and the third sub-pixel includes a driving transistor, a first transistor, and a second transistor. The driving transistor includes a gate electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, and provides a driving current to a light emitting diode. The first transistor includes a first electrode receiving a bias voltage, a second electrode connected to the second node, and a gate electrode to which a third scan signal is applied. The second transistor includes a first electrode connected to the third node, a second electrode connected to an anode of the light emitting diode, and a gate electrode to which an emission control signal is applied.