公开(公告)号：US11367381B2

公开(公告)日：2022-06-21

申请号：US17135928

申请日：2020-12-28

Applicant: LG Display Co., Ltd.

Inventor： Young-Sung Cho ,  Chui Nam ,  Byeong-Seong So ,  Hyung-Uk Jang

IPC: G09G3/30

Abstract: An electroluminescent display device has a plurality of pixels and each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, the driving transistor generating pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, an internal compensator comprising a first capacitor connected between the first node and a second node, and a second capacitor connected between the second node and an input terminal for the high-level source voltage, the internal compensator controlling a threshold voltage of the driving transistor with reference to a first scan signal, a second scan signal opposite to the first scan signal in phase, a third scan signal lagging the first scan signal in phase, a fourth scan signal leading the first scan signal in phase, and an emission signal, and a light emitting element connected between a fifth node to be connected to the fourth node and an input terminal for a low-level source voltage.

公开(公告)号：US11100867B2

公开(公告)日：2021-08-24

申请号：US16710848

申请日：2019-12-11

Applicant: LG Display Co., Ltd.

Inventor： Youngsung Cho ,  Byeong-Seong So

IPC: G09G3/3266 ,  G09G3/3258 ,  G09G3/3291

Abstract: Disclosed is a light emitting display apparatus in which two of three scan signals used by a pixel driving circuit provided in one pixel are supplied through two scan lines provided in the pixel and the other remaining signal is supplied through a scan line provided in another pixel adjacent to the pixel.

公开(公告)号：US11804181B2

公开(公告)日：2023-10-31

申请号：US17952032

申请日：2022-09-23

Applicant: LG DISPLAY CO., LTD.

Inventor： Youngsung Cho ,  Byeong-Seong So

IPC: G09G3/32 ,  G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  H10K59/124

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  H10K59/124 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2354/00

Abstract: A display device includes: a display panel including a plurality of data lines, a plurality of gate lines, and a plurality of pixels connected to the plurality of data lines and the plurality of gate lines; a data driving circuit configured to supply data signals to the plurality of data lines; a gate driving circuit configured to supply gate signals to the plurality of gate lines; and a power supply circuit configured to supply a first body voltage and a second body voltage having a voltage level that is less than the first body voltage to the plurality of pixels, the plurality of pixels being selectively supplied with the first body voltage and the second body voltage.

公开(公告)号：US11195461B2

公开(公告)日：2021-12-07

申请号：US17116770

申请日：2020-12-09

Applicant: LG Display Co., Ltd.

Inventor： Hyung-Uk Jang ,  Byeong-Seong So ,  Young-Sung Cho

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

Abstract: An electroluminescent display device having a plurality of pixels is disclosed. Each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, the driving transistor generating pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, a light emitting element connected between the fourth node and an input terminal for a low-level source voltage, an internal compensator controlling voltages of the first to fourth nodes in accordance with operations of a plurality of switching transistors in an initialization period, a data writing period and an emission period, and a refresh transistor configured to apply the high-level source voltage to the second node in accordance with a scan signal in a refresh period preceding an initialization period.

公开(公告)号：US11175759B2

公开(公告)日：2021-11-16

申请号：US16714438

申请日：2019-12-13

Applicant: LG Display Co., Ltd.

Inventor： Byeong-Seong So ,  Youngsung Cho

IPC: G06F3/041 ,  H01Q1/24

Abstract: Disclosed is a display apparatus with an integrated antenna, in which an antenna and a touch screen are embedded, and the display apparatus comprises a display panel including a touch screen and an antenna electrode, wherein the display panel is divided into a display area and a non-display area surrounding the display area and includes a pixel array part including pixel driving circuits provided in the display area and an electrode array part provided on the pixel array part and including the touch screen and the antenna electrode, the display area includes a pixel including the pixel driving circuit, and a portion of the touch screen is open.

公开(公告)号：US20240206231A1

公开(公告)日：2024-06-20

申请号：US18528466

申请日：2023-12-04

Applicant: LG Display Co., Ltd.

Inventor： Youngsung Cho ,  Byeong-Seong So

IPC: H10K59/121 ,  H10K59/131

CPC classification number: H10K59/1213 ,  H10K59/131

Abstract: A display device and a display panel are disclosed that include an efficient arrangement of pixel circuits of a first optical bezel area due to the display panel requiring a high resolution or low power consumption. The first optical bezel area is positioned between a first optical area and the normal area. A plurality of first subpixel circuit units and a plurality of second subpixel circuit units are disposed in the first optical bezel area, and a plurality of third subpixel circuit units are disposed in the normal area. At least one of a length in a first direction and a length in a second direction of the first and second subpixel circuit units is different from the length in the first direction and the length in the second direction of the third subpixel circuit unit.

公开(公告)号：US11741890B2

公开(公告)日：2023-08-29

申请号：US17952013

申请日：2022-09-23

Applicant: LG DISPLAY CO., LTD.

Inventor： SeungSeok Ryoo ,  Byeong-Seong So

IPC: G09G3/3266 ,  G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0426 ,  G09G2300/0876 ,  G09G2310/08 ,  G09G2330/028

Abstract: The present disclosure relates to a power supply device including a gate driving circuit configured to supply gate signals to a plurality of gate lines, a first power supply circuit configured to supply a first initialization voltage having a voltage level between a first voltage level and a second voltage level to a plurality of first initialization power lines, the first initialization voltage having the first voltage level in a first period, a third voltage level between the first and second voltage levels in a second period, and the second voltage level in a third period, and a second power supply circuit configured to supply a driving voltage to a plurality of driving power lines among the plurality of power lines, and a display device including the power supply device.

公开(公告)号：US11232756B2

公开(公告)日：2022-01-25

申请号：US17116750

申请日：2020-12-09

Applicant: LG Display Co., Ltd.

Inventor： Hyung-Uk Jang ,  Chul Nam ,  Byeong-Seong So ,  Young-Sung Cho

IPC: G09G3/3291 ,  G09G3/3266

Abstract: An electroluminescent display device having a plurality of pixels is disclosed. Each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, to generate pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, a light emitting element connected between the fourth node and an input terminal for a low-level source voltage, an internal compensator including first and second capacitors, and switching transistors, and a kick-back compensation transistor to apply a DC voltage higher than an initialization voltage to the first node in a kick-back compensation period between an initialization period and a data writing period.

公开(公告)号：US20210201759A1

公开(公告)日：2021-07-01

申请号：US17135928

申请日：2020-12-28

Applicant: LG Display Co., Ltd.

Inventor： Young-Sung Cho ,  Chul Nam ,  Byeong-Seong So ,  Hyung-Uk Jang

IPC: G09G3/30

Abstract: An electroluminescent display device has a plurality of pixels and each pixel includes a driving transistor having a gate connected to a first node, a source connected to a third node, and a drain connected to a fourth node, the driving transistor generating pixel current corresponding to a data voltage when a high-level source voltage is applied to the third node, an internal compensator comprising a first capacitor connected between the first node and a second node, and a second capacitor connected between the second node and an input terminal for the high-level source voltage, the internal compensator controlling a threshold voltage of the driving transistor with reference to a first scan signal, a second scan signal opposite to the first scan signal in phase, a third scan signal lagging the first scan signal in phase, a fourth scan signal leading the first scan signal in phase, and an emission signal, and a light emitting element connected between a fifth node to be connected to the fourth node and an input terminal for a low-level source voltage.

公开(公告)号：US12232353B2

公开(公告)日：2025-02-18

申请号：US17384395

申请日：2021-07-23

Applicant: LG Display Co., Ltd.

Inventor： Byeong-Seong So

IPC: H10K50/84 ,  H10K50/82 ,  H10K50/822 ,  H10K50/844 ,  H10K59/12 ,  H10K59/121 ,  G02F1/1333 ,  G02F1/1335 ,  H01L27/146 ,  H10K50/80 ,  H10K59/126 ,  H10K59/35

Abstract: The present disclosure relates to a display apparatus. The display apparatus includes a plurality of light-transmitting areas disposed between the plurality of pixels. The light-transmitting area is formed between structures disposed in the light-emitting area adjacent to the light-transmitting area, and the structure physically disconnects a cathode layer of the light-emitting area and a cathode layer of the light-transmitting area. The cathode layer may be patterned in the light-transmitting area. Accordingly, when patterning is performed with a laser, it is possible to prevent the edge of the cathode layer from being curled in the outer portion of the light-transmitting area. In addition, it is possible to pattern with low energy and solve the damage due to thermal energy of the laser beam by preventing heat conduction to the light-emitting area of the light-emitting device layer. Further, it is possible to improve the reliability by blocking the moisture permeable path.