公开(公告)号：US20240304147A1

公开(公告)日：2024-09-12

申请号：US18666328

申请日：2024-05-16

Applicant: LG Display Co., Ltd.

Inventor： Jaesung Kim

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2320/0233

Abstract: A pixel for an organic light emitting display device includes an organic light emitting diode that emits light by a driving current, a driving transistor configured to control the driving current, a first transistor to connect the second node and the third node, a second transistor to apply a data voltage to the first node, a third transistor to apply a high-potential driving voltage to the second node, a fourth transistor that forms a current path between the driving transistor and the organic light emitting diode, a fifth transistor to apply an initial voltage to the driving transistor, a sixth transistor configured to apply a reset voltage to a fourth node which is an anode electrode of the organic light emitting diode, a seventh transistor configured to apply the high-potential driving voltage to the fifth node, and an eighth transistor configured to apply a reference voltage to the fifth node.

公开(公告)号：US12020640B2

公开(公告)日：2024-06-25

申请号：US17460529

申请日：2021-08-30

Applicant: LG Display Co., Ltd.

Inventor： Jaesung Kim

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2320/0233

Abstract: A pixel for an organic light emitting display device includes an organic light emitting diode that emits light by a driving current, a driving transistor configured to control the driving current, a first transistor to connect the second node and the third node, a second transistor to apply a data voltage to the first node, a third transistor to apply a high-potential driving voltage to the second node, a fourth transistor that forms a current path between the driving transistor and the organic light emitting diode, a fifth transistor to apply an initial voltage to the driving transistor, a sixth transistor configured to apply a reset voltage to a fourth node which is an anode electrode of the organic light emitting diode, a seventh transistor configured to apply the high-potential driving voltage to the fifth node, and an eighth transistor configured to apply a reference voltage to the fifth node.

公开(公告)号：US11380246B2

公开(公告)日：2022-07-05

申请号：US17108459

申请日：2020-12-01

Applicant: LG Display Co., Ltd.

Inventor： Jaesung Kim ,  Kiwoo Kim ,  Sungwook Chang ,  Hyungsoo Kim

IPC: G09G3/32

Abstract: An electroluminescent display device comprises subpixels each including a pixel driving circuit driven in accordance with an initialization period, a sampling period and a light emission period. The pixel driving circuit includes a light emitting diode, a driving transistor including a gate connected to a first node, a drain connected to a second node, and a source connected to a third node, a first switching circuit turned on for the initialization period, providing an initialization voltage to the first node and providing a fixed voltage to the third node, a second switching circuit turned on for the sampling period, applying a data voltage to the third node and providing the initialization voltage to an anode of the light emitting diode, and a light emitting control circuit controlled by an emission signal and turned on for the light emission period to provide a high potential voltage to the third node.

公开(公告)号：US11798467B2

公开(公告)日：2023-10-24

申请号：US17958541

申请日：2022-10-03

Applicant: LG Display Co., Ltd.

Inventor： JungChul Kim ,  HoYoung Lee ,  Sungwook Chang ,  Jaesung Kim

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2310/061 ,  G09G2320/0247

Abstract: A light emitting display apparatus includes a pixel driving circuit including a driving transistor and an anode reset capacitor connected to a gate of the driving transistor and a light emitting device configured to emit light with a current supplied through the driving transistor. An anode reset period, where a data voltage is not supplied to the driving transistor, is between refresh periods where the light emitting device emits the light with the data voltage supplied to the driving transistor, and an anode reset voltage supplied to the anode reset capacitor in the refresh period is higher than an initial voltage which is input to the gate of the driving transistor in the refresh period.

公开(公告)号：US12243485B2

公开(公告)日：2025-03-04

申请号：US17528920

申请日：2021-11-17

Applicant: LG Display Co., Ltd.

Inventor： Jaesung Kim ,  JuhnSuk Yoo ,  HoYoung Lee

IPC: G09G3/325 ,  G09G3/3291 ,  H10K59/121 ,  H10K59/131

Abstract: According to an aspect of the present disclosure, an organic light emitting display apparatus includes an organic light emitting diode; a driving transistor which supplies a driving current to the organic light emitting diode; and a plurality of switching transistors to transmit a reference voltage and a data voltage to a gate electrode of the driving transistor, respectively. According to the present disclosure, one frame is divided into a refresh period in which a data voltage is written and a hold period in which the data voltage written in the refresh period is held. The refresh period includes an initialization period, a sampling period, a programming period, and an emission period, and the sampling period and the programming period may be separate from each other.

公开(公告)号：US10476023B2

公开(公告)日：2019-11-12

申请号：US15833050

申请日：2017-12-06

Applicant: LG DISPLAY CO., LTD.

Inventor： Jaesung Kim ,  MinWoo Oh

IPC: H01L51/52 ,  H01L27/32 ,  G09G3/3266 ,  G09G3/3233 ,  H01L27/12 ,  G09G3/3291

Abstract: The present disclosure relates to a display element comprising an organic light emitting diode including a first electrode and a second electrode, a driving transistor including a first node to be supplied with a data voltage, a second node connected to the first electrode of the organic light emitting diode, and a third node electrically connected to a driving voltage line, a first transistor electrically connected between a data line configured to supply the data voltage and the first node of the driving transistor, a second transistor electrically connected between an initialization voltage line configured to supply an initialization voltage and the second node of the driving transistor, and a capacitor electrically connected between the first node and the second node of the driving transistor.

公开(公告)号：US12033570B2

公开(公告)日：2024-07-09

申请号：US18225113

申请日：2023-07-22

Applicant: LG Display Co., Ltd.

Inventor： JungChul Kim ,  HoYoung Lee ,  Sungwook Chang ,  Jaesung Kim

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2310/061 ,  G09G2320/0247

Abstract: A light emitting display apparatus includes a pixel driving circuit including a driving transistor and an anode reset capacitor connected to a gate of the driving transistor and a light emitting device configured to emit light with a current supplied through the driving transistor. An anode reset period, where a data voltage is not supplied to the driving transistor, is between refresh periods where the light emitting device emits the light with the data voltage supplied to the driving transistor, and an anode reset voltage supplied to the anode reset capacitor in the refresh period is higher than an initial voltage which is input to the gate of the driving transistor in the refresh period.

公开(公告)号：US20220173189A1

公开(公告)日：2022-06-02

申请号：US17528920

申请日：2021-11-17

Applicant: LG Display Co., Ltd.

Inventor： Jaesung Kim ,  JuhnSuk Yoo ,  HoYoung Lee

IPC: H01L27/32

Abstract: According to an aspect of the present disclosure, an organic light emitting display apparatus includes an organic light emitting diode; a driving transistor which supplies a driving current to the organic light emitting diode; and a plurality of switching transistors to transmit a reference voltage and a data voltage to a gate electrode of the driving transistor, respectively. According to the present disclosure, one frame is divided into a refresh period in which a data voltage is written and a hold period in which the data voltage written in the refresh period is held. The refresh period includes an initialization period, a sampling period, a programming period, and an emission period, and the sampling period and the programming period may be separate from each other.

公开(公告)号：US20220122534A1

公开(公告)日：2022-04-21

申请号：US17460529

申请日：2021-08-30

Applicant: LG Display Co., Ltd.

Inventor： Jaesung Kim

IPC: G09G3/3233

Abstract: A pixel for an organic light emitting display device includes an organic light emitting diode that emits light by a driving current, a driving transistor configured to control the driving current, a first transistor to connect the second node and the third node, a second transistor to apply a data voltage to the first node, a third transistor to apply a high-potential driving voltage to the second node, a fourth transistor that forms a current path between the driving transistor and the organic light emitting diode, a fifth transistor to apply an initial voltage to the driving transistor, a sixth transistor configured to apply a reset voltage to a fourth node which is an anode electrode of the organic light emitting diode, a seventh transistor configured to apply the high-potential driving voltage to the fifth node, and an eighth transistor configured to apply a reference voltage to the fifth node.

公开(公告)号：US20180182995A1

公开(公告)日：2018-06-28

申请号：US15833050

申请日：2017-12-06

Applicant: LG DISPLAY CO., LTD.

Inventor： Jaesung Kim ,  MinWoo Oh

IPC: H01L51/52 ,  H01L27/32 ,  G09G3/3291 ,  G09G3/3266 ,  G09G3/3233

CPC classification number: H01L51/5206 ,  G09G3/3233 ,  G09G3/3266 ,  G09G3/3291 ,  G09G2300/0426 ,  G09G2300/0465 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2310/0262 ,  H01L27/124 ,  H01L27/1255 ,  H01L27/3262 ,  H01L27/3265 ,  H01L27/3276 ,  H01L51/5221

Abstract: The present disclosure relates to a display element comprising an organic light emitting diode including a first electrode and a second electrode, a driving transistor including a first node to be supplied with a data voltage, a second node connected to the first electrode of the organic light emitting diode, and a third node electrically connected to a driving voltage line, a first transistor electrically connected between a data line configured to supply the data voltage and the first node of the driving transistor, a second transistor electrically connected between an initialization voltage line configured to supply an initialization voltage and the second node of the driving transistor, and a capacitor electrically connected between the first node and the second node of the driving transistor.