公开(公告)号：US20230360591A1

公开(公告)日：2023-11-09

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 ,  G09G2320/0247 ,  G09G2300/0842 ,  G09G2310/061

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：US20230115779A1

公开(公告)日：2023-04-13

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

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：US20210183303A1

公开(公告)日：2021-06-17

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：US20140321599A1

公开(公告)日：2014-10-30

申请号：US14133243

申请日：2013-12-18

Applicant: LG DISPLAY CO., LTD.

Inventor： Sunghyun CHO ,  Chungsik KONG ,  Sungwook CHANG

IPC: G11C19/28

CPC classification number: G11C19/28 ,  G09G2310/0286

Abstract: Provided is a gate shift register including a plurality of stages receiving a plurality of clocks to generate gate output signals, in which an n-th stage of the stages dependently connected to each other includes an output node outputting an n-th gate output signal, a pull-up TFT switching a current flow between an input terminal of a clock having an n-th phase and the output node according to a potential of a Q node, a pull-down TFT switching the current flow between an input terminal of a low potential voltage and the output node according to a potential of a QB node, and a BTS compensation unit periodically discharging the QB node at a low potential level just after the n-th stage is reset and just until the n-th stage is set in a next frame.

Abstract translation: 提供了一种门移位寄存器，包括多个级接收多个时钟以产生门输出信号，其中相位相互连接的级的第n级包括输出第n门输出信号的输出节点， 上拉TFT根据Q节点的电位切换具有第n相的时钟的输入端和输出节点之间的电流，下拉TFT切换在 低电位电压和输出节点根据QB节点的电位，并且BTS补偿单元在第n级复位之后以低电位周期性地排出QB节点，直到第n级被设置 在下一帧。

公开(公告)号：US20200027403A1

公开(公告)日：2020-01-23

申请号：US16513650

申请日：2019-07-16

Applicant: LG Display Co., Ltd.

Inventor： Sungwook CHANG ,  Hoonju CHUNG

IPC: G09G3/3258 ,  G09G3/3291

Abstract: An organic light emitting display apparatus comprises an organic light emitting display panel including a plurality of pixels each including an emission transistor that controls a timing in which an organic light emitting diode emits light; a gate driver outputting gate pulses to a plurality of gate lines provided in the organic light emitting display panel; an emission driver provided in the organic light emitting display panel and outputting an emission signal that controls turn-on and turn-off of the emission transistor to an emission line connected to the emission transistor; a data driver outputting data voltages to a plurality of data lines provided in the organic light emitting display panel; and a controller supplying a first signal and a second signal to the emission driver through one transfer line, wherein the first signal is generated for driving the emission driver when each frame starts, and the second signal is generated for driving the emission driver and has a period shorter than one frame period, and wherein the emission driver generates the emission signal through an emission start signal transferred through the one transfer line.

公开(公告)号：US20180190197A1

公开(公告)日：2018-07-05

申请号：US15621866

申请日：2017-06-13

Applicant: LG Display Co., Ltd.

Inventor： Sungwook CHANG ,  Juhnsuk YOO ,  Jungchul KIM ,  Sungwook YOON ,  Hoyoung KO

IPC: G09G3/3258 ,  H01L27/32

CPC classification number: G09G3/3258 ,  G09G3/3233 ,  G09G2300/0814 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0866 ,  G09G2320/0233 ,  G09G2320/0238 ,  G09G2320/0252 ,  G09G2320/045 ,  H01L27/3262 ,  H01L27/3265

Abstract: An electroluminescent display is disclosed. An electroluminescent display comprises a display panel including a plurality of pixels, each of the plurality of pixels including subpixels. A pixel circuit of each subpixels includes a driving transistor configured to drive the electroluminescent diode, a first switching transistor configured to supply a first voltage to a gate of the driving transistor in response to a first scan signal, a second switching transistor configured to supply a second voltage to the gate of the driving transistor in response to a second scan signal, a third switching transistor configured to supply the second voltage to a first electrode of the driving transistor in response to the second scan signal, a fourth switching transistor configured to supply a first supply voltage to a second electrode of the driving transistor in response to an emission control signal, a first capacitor between a first node connected to the gate electrode of the driving transistor and a second node connected to the second electrode of the driving transistor, and a second capacitor between the second node and a power supply line supplied with the second voltage or the first supply voltage.

公开(公告)号：US20160155409A1

公开(公告)日：2016-06-02

申请号：US14953614

申请日：2015-11-30

Applicant: LG Display Co., Ltd.

Inventor： Hun JEOUNG ,  Sanghee YU ,  Sunghyun CHO ,  Bosun LEE ,  Byoungwoo KIM ,  Sungwook CHANG

IPC: G09G5/00

CPC classification number: G09G5/003 ,  G09G3/3677 ,  G09G3/3696 ,  G09G2310/0251 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2310/0286 ,  G09G2310/0289 ,  G09G2310/063 ,  G09G2310/08 ,  G09G2320/0257 ,  G09G2330/027 ,  G09G2330/04 ,  G11C19/28

Abstract: A display panel and a method of driving the same are disclosed. The display panel includes a shift register with a plurality of stages configured to shift and to output a scan pulse for a plurality of scan lines. Each stage includes a pull-up transistor and a pull-down transistor coupled in series and defining an output node therebetween, a driver with a first node coupled to a gate electrode of the pull-up transistor and a second node coupled to a gate electrode of the pull-down transistor; and a node controller coupled to the first node, the second node, and the output node. In each stage, the node controller is configured to selectively apply a reference voltage at the first node and the second node in response to a control signal.

Abstract translation: 公开了一种显示面板及其驱动方法。 显示面板包括具有多个级的移位寄存器，配置为移位并输出多条扫描线的扫描脉冲。 每个级包括串联耦合并在其间限定输出节点的上拉晶体管和下拉晶体管，具有耦合到上拉晶体管的栅电极的第一节点的驱动器和耦合到栅电极的第二节点 的下拉晶体管; 以及耦合到所述第一节点，所述第二节点和所述输出节点的节点控制器。 在每个阶段，节点控制器被配置为响应于控制信号在第一节点和第二节点选择性地施加参考电压。

公开(公告)号：US20190051247A1

公开(公告)日：2019-02-14

申请号：US16155422

申请日：2018-10-09

Applicant: LG Display Co., Ltd.

Inventor： Sungwook CHANG ,  Juhnsuk YOO ,  Jungchul KIM ,  Sungwook YOON ,  Hoyoung KO

IPC: G09G3/3258 ,  G09G3/3233 ,  H01L27/32

CPC classification number: G09G3/3258 ,  G09G3/3233 ,  G09G2300/0814 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0866 ,  G09G2320/0233 ,  G09G2320/0238 ,  G09G2320/0252 ,  G09G2320/045 ,  H01L27/3262 ,  H01L27/3265

Abstract: An electroluminescent display is disclosed. An electroluminescent display comprises a display panel including a plurality of pixels, each of the plurality of pixels including subpixels. A pixel circuit of each subpixels includes a driving transistor configured to drive the electroluminescent diode, a first switching transistor configured to supply a first voltage to a gate of the driving transistor in response to a first scan signal, a second switching transistor configured to supply a second voltage to the gate of the driving transistor in response to a second scan signal, a third switching transistor configured to supply the second voltage to a first electrode of the driving transistor in response to the second scan signal, a fourth switching transistor configured to supply a first supply voltage to a second electrode of the driving transistor in response to an emission control signal, a first capacitor between a first node connected to the gate electrode of the driving transistor and a second node connected to the second electrode of the driving transistor, and a second capacitor between the second node and a power supply line supplied with the second voltage or the first supply voltage.

公开(公告)号：US20170316731A1

公开(公告)日：2017-11-02

申请号：US15498584

申请日：2017-04-27

Applicant: LG Display Co., Ltd.

Inventor： SungHyun CHO ,  ChungSik KONG ,  Byoungwoo KIM ,  Sungwook CHANG ,  DongSoo KIM

IPC: G09G3/20 ,  G11C19/00

CPC classification number: G09G3/2092 ,  G09G2300/0809 ,  G09G2310/0248 ,  G09G2310/0286 ,  G11C19/00 ,  G11C19/28

Abstract: Agate driving circuit and a display device are disclosed. The gate driving circuit includes a shift register including a plurality of stages. Among the stages, an Nth stage includes a first transistor charging a Q node and a junction stress control circuit. A pull-up transistor using the Q node as a gate input controls an output signal of a stage output terminal. The junction stress control circuit includes a first, second, and third control transistors. The first control transistor, the second control transistor, the third control transistor, and the first transistor are connected to each other through a common node. The second control transistor adjusts junction stresses for the first control transistor and the first transistor by controlling a voltage of the common node. When the second control transistor is turned off, the third control transistor discharges the voltage of the common node.