公开(公告)号：US11749196B1

公开(公告)日：2023-09-05

申请号：US17961098

申请日：2022-10-06

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/0257 ,  G09G2320/045 ,  G09G2330/021

Abstract: A pixel includes a first switching transistor, a second switching transistor, a driving transistor, and a light emitting element. The first switching transistor includes a first terminal to which a bias power supply voltage is applied, a second terminal connected to a first node, and a gate terminal to which a light emitting element initialization signal is applied. The second switching transistor includes a first terminal connected to the first node, a second terminal connected to a second node, and a gate terminal to which the light emitting element initialization signal is applied. The driving transistor includes a first terminal connected to the second node, a second terminal connected to a third node, and a gate terminal. The light emitting element is connected to the driving transistor. The first node is connected to the third node, and the bias power supply voltage is applied to the second and third nodes.

公开(公告)号：US11617289B2

公开(公告)日：2023-03-28

申请号：US17244013

申请日：2021-04-29

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim ,  Doo-Na Kim ,  Meejae Kang ,  Thanh Tien Nguyen

IPC: G09G3/3258 ,  G09G3/3266

Abstract: A display device includes a pixel including a pixel driving transistor and a pixel switching transistor, the pixel driving transistor including a first active layer including a first channel area having a first length, a first gate insulating layer on the first active layer, a first gate electrode on the first gate insulating layer, a first source electrode and a first drain electrode above the first gate electrode, the pixel switching transistor including a second active layer including a second channel area having a second length that is shorter than the first length, a second gate insulating layer on the second active layer, a second gate electrode on the second gate insulating layer, a second source and a second drain electrode above the second gate electrode, and wherein the pixel driving transistor and the pixel switching transistor each include a P-MOS transistor.

公开(公告)号：US11411122B2

公开(公告)日：2022-08-09

申请号：US17086545

申请日：2020-11-02

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jaeseob Lee ,  Meejae Kang ,  Yoonho Khang ,  Keunwoo Kim ,  Hanbit Kim ,  Thanhtien Nguyen

IPC: H01L29/786 ,  H01L27/32

Abstract: A display device including: a first thin film transistor (TFT) including a first semiconductor layer and a first gate electrode, the first semiconductor layer including a first channel region, a first source region, and a first drain region; a third TFT including a third semiconductor layer and a third gate electrode, the third semiconductor layer including a third channel region, a third source region, and a third drain region, wherein a leakage current of the third TFT in an off-state is less than a leakage current of the first TFT in an off-state; and a pixel electrode connected to one of the first source region and the first drain region, wherein the one of the first source region and the first drain region is connected to the third TFT.

公开(公告)号：US20220238070A1

公开(公告)日：2022-07-28

申请号：US17521207

申请日：2021-11-08

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/3208

Abstract: A pixel includes a first capacitor including a first electrode connected to a wire of a first power supply voltage, and a second electrode connected to a gate node, a first transistor including a gate electrode connected to the gate node, and a back gate electrode connected to a back gate line, a second transistor which transmits a data signal to a source of the first transistor in response to a first gate signal, a third transistor which diode-connects the first transistor in response to the first gate signal, a fourth transistor which transmits an initialization voltage to the gate node in response to a second gate signal. The first transistor receives a back gate voltage, which is obtained by delaying the first gate signal by a ½ frame, through the back gate electrode in a low-frequency driving mode.

公开(公告)号：US20220173188A1

公开(公告)日：2022-06-02

申请号：US17411870

申请日：2021-08-25

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: H01L27/32

Abstract: Provided are a thin-film transistor substrate that has enhanced electrical characteristics, such as off-current characteristics of a thin-film transistor, without increasing the number of mask processes, a display apparatus, and a method of manufacturing the thin-film transistor substrate. The thin-film transistor substrate includes: a semiconductor layer including a first conductive region, a second conductive region, and a first semiconductor region; a lower electrode disposed on the semiconductor layer and at least partially overlapping the first semiconductor region; and an upper electrode disposed on the lower electrode and at least partially overlapping the first semiconductor region, a first boundary between the first semiconductor region and the first conductive region coincides with an edge of the upper electrode, and a second boundary between the first semiconductor region and the second conductive region coincides with an edge of the lower electrode or an edge of the upper electrode.

公开(公告)号：US09952475B2

公开(公告)日：2018-04-24

申请号：US15072849

申请日：2016-03-17

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Keunwoo Kim ,  Gunwoo Yang

IPC: G02F1/1343 ,  G02F1/1362 ,  G02F1/1368

CPC classification number: G02F1/13624 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/134345

Abstract: A liquid crystal display which enhances an aperture ratio and stabilizes a storage voltage includes a first substrate, a second substrate opposing the first substrate, a liquid crystal layer between the first substrate and the second substrate, a gate line, a data line, a first sub-pixel electrode, and a second sub-pixel electrode on the first substrate, a first transistor connected to the gate line, the data line, and the first sub-pixel electrode, and a second transistor connected to the gate line, the data line, and the second sub-pixel electrode and including a source electrode, a drain electrode and at least one floating electrode between the source electrode and the drain electrode.

公开(公告)号：US20170162147A1

公开(公告)日：2017-06-08

申请号：US15240971

申请日：2016-08-18

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Keunwoo Kim

IPC: G09G3/36 ,  G11C19/28

CPC classification number: G09G3/3655 ,  G09G3/20 ,  G09G3/3607 ,  G09G3/3688 ,  G09G2300/0426 ,  G09G2310/0267 ,  G09G2310/027 ,  G09G2310/0286 ,  G09G2310/08 ,  G11C19/28 ,  G11C19/287

Abstract: A gate driving circuit including a plurality of stages to respectively output gate signals to gate lines and connected to each other in cascade, an ith stage from among the plurality of stages including: a first output unit to generate a gate signal from a clock signal received at an input terminal; a first control unit to control the potential of a first node; a first pull-down unit to provide a first low voltage to a gate output terminal to drop down the gate signal, the first low voltage being lower than a gate off voltage of the gate signal; a first holding unit and a stabilization unit, each to provide a second low voltage having a higher level than that of the first low voltage to the gate output terminal; and a second control unit to control an operation of the first holding unit.

公开(公告)号：US12277905B2

公开(公告)日：2025-04-15

申请号：US18753689

申请日：2024-06-25

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/3233 ,  G09G3/32

Abstract: A pixel includes a first switching transistor, a second switching transistor, a driving transistor, and a light emitting element. The first switching transistor includes a first terminal to which a bias power supply voltage is applied, a second terminal connected to a first node, and a gate terminal to which a light emitting element initialization signal is applied. The second switching transistor includes a first terminal connected to the first node, a second terminal connected to a second node, and a gate terminal to which the light emitting element initialization signal is applied. The driving transistor includes a first terminal connected to the second node, a second terminal connected to a third node, and a gate terminal. The light emitting element is connected to the driving transistor. The first node is connected to the third node, and the bias power supply voltage is applied to the second and third nodes.

公开(公告)号：US12107088B2

公开(公告)日：2024-10-01

申请号：US17455188

申请日：2021-11-16

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: H01L27/14 ,  H01L27/12

CPC classification number: H01L27/1218 ,  H01L27/124 ,  H01L27/1255

Abstract: A display device includes a substrate including a polymer film, a first active pattern above the substrate, and including a first channel region, a gate electrode above the first active pattern, and overlapping the first channel region, a first storage capacitor electrode above the gate electrode, and overlapping the gate electrode, a second active pattern at a layer above the first storage capacitor electrode, and including a second channel region, a first gate line above the second active pattern, and overlapping the second channel region, and a blocking pattern between the first channel region and the first gate line in a plan view.

公开(公告)号：US12106717B2

公开(公告)日：2024-10-01

申请号：US18362335

申请日：2023-07-31

Applicant: Samsung Display Co., LTD.

Inventor： Keunwoo Kim

IPC: G09G3/3241 ,  G09G3/3266 ,  G09G3/3291

CPC classification number: G09G3/3241 ,  G09G3/3266 ,  G09G3/3291 ,  G09G2300/0439 ,  G09G2310/0278

Abstract: A pixel includes an organic light emitting diode that includes first and second terminals. A driving transistor generates a driving current, and includes a first terminal for a first power supply voltage, a second terminal connected to the first terminal of the organic light emitting diode, and a gate terminal for an initialization voltage. The first switching transistor includes a first terminal connected to a first node, a second terminal connected to the gate terminal of the driving transistor, and a gate terminal for a data initialization gate signal. The second switching transistor includes a first terminal for the initialization voltage, a second terminal connected to the first node, a first gate terminal for the data initialization gate signal, and a second gate terminal for a light emitting element initialization signal. The first terminal of the organic light emitting diode is connected to the first node.