公开(公告)号：US20210104194A1

公开(公告)日：2021-04-08

申请号：US17125732

申请日：2020-12-17

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim ,  Sooyoung Park ,  Joonghyun Park ,  Dongwoo Kim ,  Kyoung-Ju Shin

IPC: G09G3/3233 ,  G09G3/3283

Abstract: A display device includes: pixels to emit light of various intensity in accordance with driving signals; data lines to communicate the driving signals to the pixels; scan lines to communicate scan signals to select at least one of the pixels to receive the driving signals; a first power supply to supply at least one driving voltage to the pixels; and a second power supply including an initial voltage terminal to supply an initial voltage to the pixels. The at least one pixel includes: a driving transistor connected between the first power supply and an anode electrode of an organic light emitting diode, a third transistor including an oxide transistor, the third transistor having a first electrode connected to the initial voltage terminal, a second electrode connected to the anode electrode, and first and second gate electrodes, each of which is connected to one of the scan lines, and a fourth transistor including a poly-silicon transistor, the fourth transistor having a first electrode connected to the first power supply, and a second electrode connected to a second electrode of the driving transistor.

公开(公告)号：US10902778B2

公开(公告)日：2021-01-26

申请号：US16684686

申请日：2019-11-15

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim ,  Sooyoung Park ,  Joonghyun Park ,  Dongwoo Kim ,  Kyoung-Ju Shin

IPC: G09G3/36 ,  G09G3/3233 ,  G09G3/3283 ,  H05B45/00

Abstract: A display device includes: pixels to emit light of various intensity in accordance with driving signals; data lines to communicate the driving signals to the pixels; scan lines to communicate scan signals to select at least one of the pixels to receive the driving signal; and a power supply to supply at least one driving voltage to the pixels. The at least one pixel includes: a switching transistor including an oxide transistor, the switching transistor having a first electrode connected to the data line, a second electrode connected to a first node, and first and second gate electrodes, each of which is connected to one of the scan lines, and a driving transistor including a poly-silicon transistor, and the driving transistor being connected between the power supply and an organic light emitting diode.

公开(公告)号：US10593282B2

公开(公告)日：2020-03-17

申请号：US16224589

申请日：2018-12-18

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/36

Abstract: A k-th driving stage includes a first pull-down transistor. The first pull-down transistor includes a first control electrode receiving a second control signal activated after the k-th gate signal is output, a second control electrode receiving the switching signal synchronized with a clock signal, an input electrode receiving a first discharge voltage, and an output electrode connected to the output electrode of the first output transistor.

公开(公告)号：US10367097B2

公开(公告)日：2019-07-30

申请号：US15221785

申请日：2016-07-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Keunwoo Kim

IPC: G02F1/136 ,  H01L29/786 ,  H01L21/027 ,  G02F1/1333 ,  G02F1/1343 ,  G02F1/1362 ,  H01L21/306 ,  H01L27/12 ,  H01L29/417 ,  G02F1/1368

Abstract: A liquid crystal display device and a method of manufacturing a liquid crystal display device, the liquid crystal display device including a first substrate and a second substrate spaced apart from each other; 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 switching element connected to the gate line, the data line, and the first sub-pixel electrode; and a second switching element connected to the gate line, the first sub-pixel electrode, and the second sub-pixel electrode.

公开(公告)号：US20190147823A1

公开(公告)日：2019-05-16

申请号：US16224589

申请日：2018-12-18

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/36

CPC classification number: G09G3/3677 ,  G09G3/3688 ,  G09G3/3696 ,  G09G2300/0809 ,  G09G2310/0286

Abstract: A k-th driving stage includes a first pull-down transistor. The first pull-down transistor includes a first control electrode receiving a second control signal activated after the k-th gate signal is output, a second control electrode receiving the switching signal synchronized with a clock signal, an input electrode receiving a first discharge voltage, and an output electrode connected to the output electrode of the first output transistor.

公开(公告)号：US12120919B2

公开(公告)日：2024-10-15

申请号：US17679691

申请日：2022-02-24

Applicant: Samsung Display Co., Ltd.

Inventor： Jaehwan Chu ,  Meejae Kang ,  Keunwoo Kim ,  Doona Kim ,  Sangsub Kim ,  Hanbit Kim ,  Dokyeong Lee ,  Yongsu Lee

IPC: H10K59/12 ,  H10K59/121

CPC classification number: H10K59/1213 ,  H10K59/1216 ,  H10K59/1201

Abstract: A method of manufacturing a display apparatus includes forming a first photosensitive pattern and a second photosensitive pattern of different thicknesses on an active layer; forming a driving semiconductor layer and a compensation semiconductor layer using the first photosensitive pattern and the second photosensitive pattern as masks to etch the active layer; exposing an upper surface of the driving semiconductor layer by etching the first photosensitive pattern and forming a third photosensitive pattern by etching at least a portion of the second photosensitive pattern; forming a first insulating layer on the driving semiconductor layer and the third photosensitive pattern; exposing an upper surface of the compensation semiconductor layer by stripping the third photosensitive pattern; and forming a second insulating layer on the first insulating layer and the compensation semiconductor layer.

公开(公告)号：US12039932B2

公开(公告)日：2024-07-16

申请号：US18234089

申请日：2023-08-15

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/3233 ,  G09G3/32

CPC classification number: G09G3/3233 ,  G09G3/32 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  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：US12002419B2

公开(公告)日：2024-06-04

申请号：US17521207

申请日：2021-11-08

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/3208

CPC classification number: G09G3/3208 ,  G09G2300/0809 ,  G09G2310/08 ,  G09G2320/0214 ,  G09G2330/021

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：US11910648B2

公开(公告)日：2024-02-20

申请号：US17411870

申请日：2021-08-25

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: H01L27/14 ,  H10K59/121 ,  H01L27/12 ,  H01L29/66 ,  H01L29/786 ,  H10K59/12

CPC classification number: H10K59/1213 ,  H10K59/1216 ,  H01L27/1222 ,  H01L27/1255 ,  H01L27/1274 ,  H01L29/66757 ,  H01L29/78675 ,  H01L29/78696 ,  H10K59/1201

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：US11715422B2

公开(公告)日：2023-08-01

申请号：US17871089

申请日：2022-07-22

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.