公开(公告)号：US11341896B2

公开(公告)日：2022-05-24

申请号：US16600431

申请日：2019-10-11

Applicant: LG Display Co., Ltd.

Inventor： Hoyoung Ko ,  JuhnSuk Yoo

IPC: G09G3/30 ,  G09G3/20

Abstract: An electroluminescent display device comprises a pixel including a plurality of subpixels; a plurality of power lines for providing a power voltage to the plurality of subpixels; a data line for providing data signals to the plurality of subpixels; a plurality of gate lines for providing gate signals to the plurality of subpixels; and a reference node line for connecting a plurality of reference nodes included in the plurality of subpixels, wherein each of the subpixels comprises a light emitting diode and a subpixel driving circuit for controlling light emission of the light emitting diode, and wherein the subpixel driving circuit provides a driving current without including a high potential voltage to the light emitting diode as a reference voltage that is applied from one of the plurality of power lines to the reference node included in the subpixel driving circuit, and some of the plurality of subpixels include a compensation transistor connected to the reference node receiving the reference voltage.

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：US10559261B2

公开(公告)日：2020-02-11

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

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：US11631364B2

公开(公告)日：2023-04-18

申请号：US17730584

申请日：2022-04-27

Applicant: LG DISPLAY CO., LTD.

Inventor： Hoyoung Ko ,  JuhnSuk Yoo

IPC: G09G3/30 ,  G09G3/20

Abstract: An electroluminescent display device comprises a pixel including a plurality of subpixels; a plurality of power lines for providing a power voltage to the plurality of subpixels; a data line for providing data signals to the plurality of subpixels; a plurality of gate lines for providing gate signals to the plurality of subpixels; and a reference node line for connecting a plurality of reference nodes included in the plurality of subpixels, wherein each of the subpixels comprises a light emitting diode and a subpixel driving circuit for controlling light emission of the light emitting diode, and wherein the subpixel driving circuit provides a driving current without including a high potential voltage to the light emitting diode as a reference voltage that is applied from one of the plurality of power lines to the reference node included in the subpixel driving circuit, and some of the plurality of subpixels include a compensation transistor connected to the reference node receiving the reference voltage.

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.