公开(公告)号：US20240038155A1

公开(公告)日：2024-02-01

申请号：US18485048

申请日：2023-10-11

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  Wookyu Sang

IPC: G09G3/3208

CPC classification number: G09G3/3208 ,  G09G2310/08 ,  G09G2320/0252 ,  G09G2320/0233

Abstract: An electroluminescent display device using a variable refresh rate (VRR) mode. The occurrence of a difference in luminance at a time point of a refresh rate change is reduced, thereby preventing viewers from perceiving the change of the refresh rate.

公开(公告)号：US11545083B2

公开(公告)日：2023-01-03

申请号：US17472399

申请日：2021-09-10

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  Wookyu Sang

IPC: G09G3/3208

Abstract: An electroluminescent display device using a variable refresh rate (VRR) mode. The occurrence of a difference in luminance at a time point of a refresh rate change is reduced, thereby preventing viewers from perceiving the change of the refresh rate.

公开(公告)号：US10242634B2

公开(公告)日：2019-03-26

申请号：US14983708

申请日：2015-12-30

Applicant: LG Display Co., Ltd.

Inventor： Wookyu Sang ,  Sangjin Nam ,  Ooksang Yoo ,  Seungjin Yoo

IPC: G09G3/36 ,  G09G3/3275

Abstract: A display device is disclosed. A display panel includes a plurality of subpixels of a plurality of colors arranged in a matrix form, and a plurality of gate lines and data lines respectively connected to the subpixels. A data driver is configured to supply data voltages to the subpixels through a plurality of source channels and the data lines. A switch circuit is configured to connect one of the source channels selectively to one of the data lines during a first scan period in one horizontal period and to a different one of the data lines during a second scan period in the one horizontal period. The data driver is configured to supply data voltages of one color to the one of the source channels during both the first scan period and the second scan period in the one horizontal period.

公开(公告)号：US12165579B2

公开(公告)日：2024-12-10

申请号：US18485048

申请日：2023-10-11

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  Wookyu Sang

IPC: G09G3/3208

Abstract: An electroluminescent display device using a variable refresh rate (VRR) mode. The occurrence of a difference in luminance at a time point of a refresh rate change is reduced, thereby preventing viewers from perceiving the change of the refresh rate.

公开(公告)号：US12112693B1

公开(公告)日：2024-10-08

申请号：US18224374

申请日：2023-07-20

Applicant: LG DISPLAY CO., LTD.

Inventor： Wookyu Sang ,  Moonsoo Chung

IPC: G09G3/32 ,  G09G3/3266

CPC classification number: G09G3/32 ,  G09G3/3266 ,  G09G2310/0267 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/0271

Abstract: A display device according to the embodiment of the present disclosure includes: a display panel that includes a display area where a plurality of pixels is disposed and a non-display area disposed around the display area; a gate driver that provides a scan signal and an emission control signal to the display panel; and a controller that drives the display panel in accordance with a refresh rate. The plurality of pixels includes a light emitting element and a pixel circuit that drives the light emitting element. The pixel circuit is driven in sets including at least one refresh period and at least one hold period in low frequency driving. The controller controls dynamically the refresh rate during the at least one set when a gradation of an image changes, and simultaneously, changes and supplies a bias voltage during the at least one hold period.

公开(公告)号：US20220101785A1

公开(公告)日：2022-03-31

申请号：US17472399

申请日：2021-09-10

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  Wookyu Sang

IPC: G09G3/3208

Abstract: An electroluminescent display device using a variable refresh rate (VRR) mode. The occurrence of a difference in luminance at a time point of a refresh rate change is reduced, thereby preventing viewers from perceiving the change of the refresh rate.

公开(公告)号：US12183268B2

公开(公告)日：2024-12-31

申请号：US18368371

申请日：2023-09-14

Applicant: LG Display Co., Ltd.

Inventor： Taehun Kim ,  Wookyu Sang ,  Moonsoo Chung

IPC: G09G3/32 ,  G09G3/20 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3266 ,  H01L25/075 ,  H01L33/36

Abstract: A display device can include a light emitting element and a pixel circuit including a driving transistor; a first capacitor connected between the driving transistor and a first node; a first transistor connected between the first capacitor and a data line to operate based on a first scan signal; a first light emission transistor connected between the first capacitor and a reference voltage line to operate based on a light emission signal; and a second light emission transistor connected between the driving transistor and a low-potential voltage line to operate based on the light emission signal. The first scan signal sequentially includes a dummy scan signal section and driving scan signal section for turning on the first transistor, and the light emission signal includes a coupling period for turning on the first and second light emission transistors between the dummy scan signal section and the driving scan signal section.

公开(公告)号：US12062320B2

公开(公告)日：2024-08-13

申请号：US18224376

申请日：2023-07-20

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyoungsik Kim ,  Wookyu Sang

IPC: G09G3/20

CPC classification number: G09G3/2096 ,  G09G3/20 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0294 ,  G09G2310/08 ,  G09G2320/0223 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2330/028 ,  G09G2340/0435

Abstract: Embodiments of the present disclosure relate to a pixel circuit comprising: a light emitting device which emits light with a luminance corresponding to an amount of driving current applied thereto; a driving transistor which controls the amount of the driving current applied to the light emitting device; a storage capacitor which is connected to the driving transistor; a first transistor which is turned on according to a first scan signal and transmits a data voltage to the storage capacitor; and a second transistor which is turned on according to a second scan signal and diode-connects the driving transistor, wherein the driving transistor and the first transistor are low temperature poly-silicon (LTPS) thin film transistors, and wherein the second transistor is an oxide semiconductor thin film transistor.

公开(公告)号：US11929025B2

公开(公告)日：2024-03-12

申请号：US17981196

申请日：2022-11-04

Applicant: LG Display Co., Ltd.

Inventor： Dongkyu Lee ,  Wookyu Sang

IPC: G09G3/32 ,  G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/3233 ,  G09G3/2007 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0294 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2330/021

Abstract: Disclosed is a display device comprising a light emitting element, and a pixel driving circuit connected to the light emitting element and configured to include first to fourth nodes, wherein the pixel driving circuit includes a driving transistor connected to the first to third nodes, a plurality of switching transistors, a storage capacitor, and a plurality of signals and voltage lines, wherein an initialization voltage applied through an initialization line among the plurality of signals and voltage lines is varied based on a data voltage.

公开(公告)号：US10311810B2

公开(公告)日：2019-06-04

申请号：US15606999

申请日：2017-05-26

Applicant: LG Display Co., Ltd.

Inventor： Wookyu Sang

IPC: G09G3/36 ,  G02F1/13 ,  G09G3/34 ,  G02F1/163

Abstract: A liquid crystal display device includes a plurality of data lines; a plurality of gate lines and a pixel array including a plurality of subpixels formed of first-color to fourth-color subpixels. The plurality of subpixels has a first arrangement or a second arrangement. The first arrangement is an arrangement in which in each row of the pixel array two of the first-color to fourth-color subpixels is interleaved. The second arrangement is a different arrangement than the first arrangement in which in each row of the pixel array two of the first-color to fourth-color subpixels are interleaved. A data driver is configured to drive the pixel array according to a first driving method when the pixel array has the first arrangement and drive the pixel array according to at least one second driving method that is different from the first driving method when the pixel array has the second arrangement.