公开(公告)号：US20230215359A1

公开(公告)日：2023-07-06

申请号：US17981196

申请日：2022-11-04

Applicant: LG Display Co., Ltd.

Inventor： Dongkyu LEE ,  WooKyu SANG

IPC: G09G3/3233 ,  G09G3/20

CPC classification number: G09G3/3233 ,  G09G3/2007 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2310/0294 ,  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：US20240233621A9

公开(公告)日：2024-07-11

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

CPC classification number: G09G3/32 ,  G09G2310/0267 ,  G09G2320/0233 ,  G09G2320/0252

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：US20240135867A1

公开(公告)日：2024-04-25

申请号：US18368371

申请日：2023-09-13

Applicant: LG Display Co., Ltd.

Inventor： Taehun KIM ,  WooKyu SANG ,  Moonsoo CHUNG

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/0267 ,  G09G2320/0233 ,  G09G2320/0252

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：US20240029626A1

公开(公告)日：2024-01-25

申请号：US18221610

申请日：2023-07-13

Applicant: LG Display Co., Ltd.

Inventor： Taehun KIM ,  WooKyu SANG ,  Moonsoo CHUNG

IPC: G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/2096 ,  G09G3/3233 ,  G09G3/2007 ,  G09G2300/0842 ,  G09G2300/0819 ,  G09G2300/0861 ,  G09G2310/0262 ,  G09G2310/08 ,  G09G2340/0442 ,  G09G2320/0247

Abstract: A display device can include a light-emitting element, a driving transistor providing a driving current to the light-emitting element using a driving voltage, and a plurality of switching transistors controlling driving of the driving transistor are disposed on a display panel. A gate driving circuit supplies scan signals to the display panel through gate lines. An emission driving circuit supplies a plurality of emission signals to the display panel through a plurality of emission signal lines. A data driving circuit supplies a data voltage to the display panel. A timing controller divides the display panel into a plurality of blocks and controls a level of a bias voltage applied to the driving transistor of a corresponding block among the plurality of blocks according to a grayscale of the data voltage supplied to the corresponding block in a low-speed mode operating at a low-speed driving frequency.