公开(公告)号：US10127859B2

公开(公告)日：2018-11-13

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 ,  G09G3/3233 ,  H01L27/32

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：US09754551B2

公开(公告)日：2017-09-05

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: G09G3/36 ,  G09G5/00 ,  G11C19/28

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.

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：US10916195B2

公开(公告)日：2021-02-09

申请号：US16513650

申请日：2019-07-16

Applicant: LG Display Co., Ltd.

Inventor： Sungwook Chang ,  Hoonju Chung

IPC: G09G3/32 ,  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：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：US11107388B2

公开(公告)日：2021-08-31

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: G11C19/00 ,  G09G3/20 ,  G11C19/28

Abstract: A gate 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.

公开(公告)号：US11037493B2

公开(公告)日：2021-06-15

申请号：US16716192

申请日：2019-12-16

Applicant: LG Display Co., Ltd.

Inventor： Sungwook Chang

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  G09G3/20

Abstract: An electroluminescence display device including a gate driver comprised of a plurality of stages, the gate driver comprises a kth stage for providing an emission signal to an nth pixel row (where n and k are natural numbers and 1≤k≤n); a first controller of the kth stage that is connected to the kth stage and providing an input signal; and a second controller of the kth stage that is connected to the kth stage and receiving an output signal of the kth stage as an input signal, wherein the first controller is implemented to generate a control signal for sensing the nth pixel row, and wherein the second controller is connected to an emission line, to which the emission signal is applied, to provide the output signal of the kth stage to the emission line, and the second controller is connected to a first controller of a (k+1)th stage to provide the output signal of the kth stage shifted to an emission carry signal to the first controller of the (k+1)th stage.

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：US10004124B1

公开(公告)日：2018-06-19

申请号：US15614305

申请日：2017-06-05

Applicant: LG Display Co., Ltd.

Inventor： Hoyoung Ko ,  Juhnsuk Yoo ,  Sungwook Yoon ,  Sungwook Chang

IPC: H01J1/62 ,  H05B33/10 ,  G09G3/30 ,  H01L25/04 ,  H01L51/52 ,  H01L27/32 ,  G09G3/14

Abstract: Disclosed is a display device having a display panel including pixels, a pixel circuit of each of the pixels comprising a capacitor connected between a first and second node, a driving transistor connected to the second node, a third node, and a first supply voltage, a first transistor supplying the first supply voltage or a reference voltage to the first node, a second transistor supplying the reference voltage to the second node, a third transistor supplying a data voltage to the first node, a fourth transistor forming a current path between the second and third nodes, a fifth transistor supplying the reference voltage or a reset voltage to the fourth node, a sixth transistor supplying the reference voltage to the first node, a seventh transistor forming a current path between the third and fourth nodes, and a diode connected to the fourth node and a second supply voltage.

公开(公告)号：US20160182042A1

公开(公告)日：2016-06-23

申请号：US14969280

申请日：2015-12-15

Applicant: LG Display Co., Ltd.

Inventor： DongSoo Kim ,  Hun Jeoung ,  SangHee Yu ,  SungHyun Cho ,  BoSun Lee ,  Sungwook Chang

IPC: H03K17/687 ,  G09G3/20 ,  G06F1/04

CPC classification number: H03K17/6871 ,  G06F1/04 ,  G09G3/2092 ,  G09G3/3225 ,  G09G3/3266 ,  G09G3/3648 ,  G09G3/3677 ,  G09G2300/0408 ,  G09G2300/0809 ,  G09G2310/0224 ,  G09G2310/0286 ,  G09G2310/08 ,  G09G2320/0214 ,  G11C19/28

Abstract: A gate driver and a display device including the gate driver are provided which can prevent an abnormal output of a gate-high voltage from a stage by stably maintaining a discharge potential of a pull-up node. The gate driver includes a plurality of stages, and each stage includes a pull-up transistor that outputs a clock signal input to a first clock terminal to an output terminal depending on a voltage of a pull-up node; a pull-down transistor that outputs a first source voltage input to a first source voltage terminal to the output terminal depending on a voltage of a pull-down node; and a first noise removing unit that supplies a gate-off voltage to the pull-up node to remove noise of the pull-up node in response to the clock signal input to the first clock terminal.

Abstract translation: 提供了一种栅极驱动器和包括栅极驱动器的显示装置，其可以通过稳定地维持上拉节点的放电电位来防止来自级的栅极 - 高电压的异常输出。 栅极驱动器包括多个级，并且每个级包括上拉晶体管，其根据上拉节点的电压将输入到第一时钟端子的时钟信号输出到输出端子; 下拉晶体管，其根据下拉节点的电压将输入到第一源极电压端子的第一源极电压输出到输出端子; 以及第一噪声去除单元，其向所述上拉节点提供栅极截止电压，以响应于输入到所述第一时钟端子的时钟信号来去除所述上拉节点的噪声。