公开(公告)号：US11195444B2

公开(公告)日：2021-12-07

申请号：US17038256

申请日：2020-09-30

Applicant: Samsung Display Co., Ltd.

Inventor： Keun Woo Kim ,  Tae Wook Kang ,  Hye Na Kwak ,  Doo Na Kim ,  Han Bit Kim ,  Bum Mo Sung ,  Do Kyeong Lee ,  Yong Su Lee ,  Jae Hwan Chu

IPC: G09G3/20

Abstract: A display device includes: a pixel unit including a plurality of pixels; a scan driver having a plurality of stages and configured to supply a scan signal to the pixel unit; and a light emission control driver having a plurality of stages and configured to supply a light emission control signal to the pixel unit, wherein a first transistor of a plurality of transistors included in at least one of the stages of the scan driver or the stages of the light emission control driver comprises: an active layer pattern on a base layer, and including a channel region forming a channel, and first and second regions on opposite sides of the channel region; and a gate electrode spaced apart from the active layer pattern with a first insulating film therebetween, and overlapping the channel region.

公开(公告)号：US11410602B2

公开(公告)日：2022-08-09

申请号：US17092832

申请日：2020-11-09

Applicant: Samsung Display Co., LTD.

Inventor： Keun Woo Kim ,  Hye Na Kwak ,  Doo Na Kim ,  Han Bit Kim ,  Yong Su Lee

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

Abstract: A display device includes a driving circuit that drives a pixel, and a display region including the pixel. The pixel includes a light emitting element electrically connected between a first power source and a second power source, a first transistor electrically connected between the first power source and the light emitting element to control a driving current, the first transistor including a first gate electrode electrically connected to a first node, and a second gate electrode electrically connected to a bias control line, and a switching transistor electrically connected between a data line and the first node, the switching transistor including a gate electrode electrically connected to a scan line. The driving circuit varies a control signal provided to the bias control line in a second period based on a first data signal provided to the data line during a first period.

公开(公告)号：US11437455B2

公开(公告)日：2022-09-06

申请号：US16856780

申请日：2020-04-23

Applicant: Samsung Display Co., LTD.

Inventor： Keun Woo Kim ,  Hye Na Kwak ,  Doo Na Kim ,  Sang Sub Kim ,  Thanh Tien Nguyen ,  Yong Su Lee ,  Jae Hwan Chu

IPC: G09G3/3233 ,  H01L27/32 ,  H01L27/12 ,  H01L29/786 ,  H01L29/66

Abstract: A display device includes a pixel disposed in a display region. The pixel includes a light-emitting element connected between a first power source and a second power source; a first transistor connected between the first power source and the light-emitting element to control a driving current flowing in the light-emitting element in response to a voltage of a first node; and at least one switching transistor to transmit a data signal or a voltage of an initialization power source to the first node. The switching transistor includes a first channel region, a first conductive region and a second conductive region which are respectively disposed at opposite sides of the first channel region, and a first wide band-gap region disposed between the first channel region and the second conductive region.

公开(公告)号：US11659745B2

公开(公告)日：2023-05-23

申请号：US17683848

申请日：2022-03-01

Applicant: Samsung Display Co., LTD.

Inventor： Myoung Geun Cha ,  Sang Gun Choi ,  Hye Na Kwak ,  Yun Jung Oh ,  Ki Seok Choi

IPC: G06F3/044 ,  H01L27/12 ,  H01L27/32 ,  H01L29/786

CPC classification number: H01L27/3276 ,  G06F3/0445 ,  H01L27/323 ,  H01L27/3262 ,  H01L27/3265 ,  H01L27/3272 ,  H01L27/124 ,  H01L27/1222 ,  H01L27/1255 ,  H01L29/78633 ,  H01L29/78675

Abstract: A display device including: a substrate including a main area and a sub-area at a side of the main area; a thin-film transistor on the substrate and positioned in the main area; a first insulating layer on a gate electrode of the thin-film transistor; a light-emitting element on the first insulating layer, positioned in the main area, and electrically connected to the thin-film transistor; a plurality of pads on the first insulating layer and positioned in the sub-area; and a light-blocking layer overlapping the plurality of pads and located between the substrate and the first insulating layer.

公开(公告)号：US12159585B2

公开(公告)日：2024-12-03

申请号：US18448817

申请日：2023-08-11

Applicant: Samsung Display Co., LTD.

Inventor： Keun Woo Kim ,  Hye Na Kwak ,  Chan Yeob Seol ,  Bum Mo Sung ,  Ji Yeong Shin

IPC: G09G3/3233 ,  G09G3/3291

Abstract: A display device includes: a light emitting element on a substrate; a third-first transistor and a third-second transistor connected in series between a gate electrode of the first transistor and a drain electrode of the first transistor; a first metal layer on the substrate and comprising a gate electrode of the third-first transistor and a gate electrode of the third-second transistor; a hydrogen passivation layer on the first metal layer; a semiconductor region of each of a first transistor, the third-first transistor, and the third-second transistor on the hydrogen passivation layer; a gate electrode on the capping layer; a first bias electrode on a same layer as the gate electrode of the first transistor and overlapping the semiconductor region of the third-first transistor; and a second bias electrode on a same layer as the first bias electrode and overlapping the semiconductor region of the third-second transistor.

公开(公告)号：US11158261B2

公开(公告)日：2021-10-26

申请号：US16852848

申请日：2020-04-20

Applicant: Samsung Display Co., Ltd.

Inventor： Keun Woo Kim ,  Mee Jae Kang ,  Hye Na Kwak ,  Han Bit Kim ,  Thanh Tien Nguyen ,  Yong Su Lee ,  Jae Seob Lee

IPC: G09G3/325 ,  G09G3/3283 ,  G09G3/3266

Abstract: A display device includes: a pixel including: a light emitting element connected between a first power source and a second power source; a first transistor connected between the first power source and the light emitting element to control a driving current, and including a first gate electrode connected to a first node and a second gate electrode connected to a bias control line; and a switching transistor connected between a data line and the first node, and including a gate electrode connected to a scan line; and a driving circuit to drive the pixel according to a driving frequency. The driving circuit drives the pixel in a first mode when the driving frequency is in a first range, and sequentially supplies a control signal having a first voltage and a second voltage to the bias control line during a light emission period of the pixel in the first mode.