公开(公告)号：US20230112253A1

公开(公告)日：2023-04-13

申请号：US18078072

申请日：2022-12-08

Applicant: Samsung Display Co., LTD.

Inventor： Keun Woo KIM ,  Tae Wook KANG ,  Han Bit KIM ,  Bum Mo SUNG ,  Do Kyeong LEE ,  Jae Seob LEE

IPC: H01L27/32

Abstract: A light emitting display device includes: a light emitting element; a second transistor connected to a scan line; a first transistor which applies a current to the light emitting element; a capacitor connected to a gate electrode of the first transistor; and a third transistor connected to an output electrode of the first transistor and the gate electrode of the first transistor. Channels of the second transistor, the first transistor, and the third transistor are disposed in a polycrystalline semiconductor layer, and a width of a channel of the third transistor is in a range of about 1 µm to about 2 µm, and a length of the channel of the third transistor is in a range of about 1 µm to about 2.5 µm.

公开(公告)号：US20220140038A1

公开(公告)日：2022-05-05

申请号：US17572913

申请日：2022-01-11

Applicant: Samsung Display Co., Ltd.

Inventor： Joon Woo BAE ,  So Young KOO ,  Han Bit KIM ,  Thanh Tien NGUYEN ,  Kyoung Won LEE ,  Yong Su LEE ,  Jae Seob LEE ,  Gyoo Chul JO

IPC: H01L27/32 ,  H01L51/52 ,  H01L29/786 ,  H01L27/12

Abstract: An organic light emitting diode display according to an exemplary embodiment includes: a substrate; a first buffer layer on the substrate; a first semiconductor layer on the first buffer layer; a first gate insulating layer on the first semiconductor layer; a first gate electrode and a blocking layer on the first gate insulating layer; a second buffer layer on the first gate electrode; a second semiconductor layer on the second buffer layer; a second gate insulating layer on the second semiconductor layer; and a second gate electrode on the second gate insulating layer.

公开(公告)号：US20210049958A1

公开(公告)日：2021-02-18

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.

公开(公告)号：US20220139966A1

公开(公告)日：2022-05-05

申请号：US17386854

申请日：2021-07-28

Applicant: Samsung Display Co., LTD.

Inventor： Han Bit KIM ,  Mee Jae KANG ,  Keun Woo KIM ,  Doo-Na KIM ,  Sang Sub KIM ,  Do Kyeong LEE ,  Jae Hwan CHU

IPC: H01L27/12

Abstract: A display device includes a substrate, a semiconductor layer disposed on the substrate, and including a first channel portion, a second channel portion, a connecting portion disposed between the first channel portion and the second channel portion, and electrode regions, a first insulating layer disposed on the semiconductor layer, a gate conductor disposed on the first insulating layer and including a first gate electrode overlapping the first channel portion and a second gate electrode overlapping the second channel portion, signal lines disposed on the substrate, a first electrode electrically connected to at least one of electrode regions of the semiconductor layer, an emission layer disposed on the first electrode, and a second electrode disposed on the emission layer, and the first channel portion and the second channel portion of the semiconductor layer each have a first width greater than a second width of the connecting portion.

公开(公告)号：US20200342815A1

公开(公告)日：2020-10-29

申请号：US16811514

申请日：2020-03-06

Applicant: Samsung Display Co., LTD.

Inventor： Keun Woo KIM ,  Mee Jae KANG ,  Han Bit KIM ,  Thanh Tien NGUYEN ,  Yong Su LEE ,  Jae Seob LEE

IPC: G09G3/3266 ,  G09G3/3291

Abstract: A display device including pixels is provided. Each of the pixels includes a first transistor having a gate electrode connected to a first node, a first electrode connected to a second node, and a second electrode connected to a third node, a second transistor having a gate electrode connected to a first scan line, a first electrode connected to a data line, and a second electrode connected to the second node, and a third transistor having a first gate electrode connected to the first scan line, a second gate electrode, a first electrode connected to the first node, and a second electrode connected to the third node. The second gate electrode may be in a floating state, and the third transistor may be aged to alleviate a leakage current in order to improve image generation.

公开(公告)号：US20240121984A1

公开(公告)日：2024-04-11

申请号：US18455832

申请日：2023-08-25

Applicant: Samsung Display Co., LTD.

Inventor： Han Bit KIM ,  Keun Woo KIM ,  Doo Na KIM ,  Sang Sub KIM ,  Chan Yeob SEOL ,  Jae Hwan CHU ,  Sang Gun CHOI

IPC: H10K59/121 ,  H10K59/131

CPC classification number: H10K59/1213 ,  H10K59/131

Abstract: A display device including a pixel electrode, and a pixel circuit electrically connected to the pixel electrode. The pixel circuit includes a first transistor including sub-transistors electrically connected to each other through a first common node, a second transistor including sub-transistors electrically connected to each other through a second common node, a first electrode electrically connecting the first common node with the second common node, and a second electrode disposed to overlap the first electrode and electrically connected to a direct current power source.

公开(公告)号：US20240081099A1

公开(公告)日：2024-03-07

申请号：US18505778

申请日：2023-11-09

Applicant: Samsung Display Co., Ltd.

Inventor： Joon Woo BAE ,  So Young KOO ,  Han Bit KIM ,  Thanh Tien NGUYEN ,  Kyoung Won LEE ,  Yong Su LEE ,  Jae Seob LEE ,  Gyoo Chul JO

IPC: H10K59/121 ,  H10K50/844 ,  H10K59/126 ,  H10K59/131

CPC classification number: H10K59/1213 ,  H10K50/844 ,  H10K59/1216 ,  H10K59/126 ,  H10K59/131 ,  H01L29/7869

Abstract: An organic light emitting diode display according to an exemplary embodiment includes: a substrate; a first buffer layer on the substrate; a first semiconductor layer on the first buffer layer; a first gate insulating layer on the first semiconductor layer; a first gate electrode and a blocking layer on the first gate insulating layer; a second buffer layer on the first gate electrode; a second semiconductor layer on the second buffer layer; a second gate insulating layer on the second semiconductor layer; and a second gate electrode on the second gate insulating layer.

公开(公告)号：US20210210014A1

公开(公告)日：2021-07-08

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

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：US20240145483A1

公开(公告)日：2024-05-02

申请号：US18405283

申请日：2024-01-05

Applicant: Samsung Display Co., LTD.

Inventor： Han Bit KIM ,  Mee Jae KANG ,  Keun Woo KIM ,  Doo-Na KIM ,  Sang Sub KIM ,  Do Kyeong LEE ,  Jae Hwan CHU

IPC: H01L27/12

CPC classification number: H01L27/1222 ,  H01L27/124 ,  H01L27/156

Abstract: A display device includes a substrate, a semiconductor layer disposed on the substrate, and including a first channel portion, a second channel portion, a connecting portion disposed between the first channel portion and the second channel portion, and electrode regions, a first insulating layer disposed on the semiconductor layer, a gate conductor disposed on the first insulating layer and including a first gate electrode overlapping the first channel portion and a second gate electrode overlapping the second channel portion, signal lines disposed on the substrate, a first electrode electrically connected to at least one of electrode regions of the semiconductor layer, an emission layer disposed on the first electrode, and a second electrode disposed on the emission layer, and the first channel portion and the second channel portion of the semiconductor layer each have a first width greater than a second width of the connecting portion.

公开(公告)号：US20240107808A1

公开(公告)日：2024-03-28

申请号：US18525662

申请日：2023-11-30

Applicant: Samsung Display Co., LTD.

Inventor： Keun Woo KIM ,  Tae Wook KANG ,  Han Bit KIM ,  Bum Mo SUNG ,  Do Kyeong LEE ,  Jae Seob LEE

IPC: H10K59/121

CPC classification number: H10K59/1213 ,  H10K59/1216 ,  H01L29/6675

Abstract: A light emitting display device includes: a light emitting element; a second transistor connected to a scan line; a first transistor which applies a current to the light emitting element; a capacitor connected to a gate electrode of the first transistor; and a third transistor connected to an output electrode of the first transistor and the gate electrode of the first transistor. Channels of the second transistor, the first transistor, and the third transistor are disposed in a polycrystalline semiconductor layer, and a width of a channel of the third transistor is in a range of about 1 μm to about 2 μm, and a length of the channel of the third transistor is in a range of about 1 μm to about 2.5 μm.