公开(公告)号：US11758755B2

公开(公告)日：2023-09-12

申请号：US17228586

申请日：2021-04-12

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim ,  Hyena Kwak ,  Taewook Kang ,  Jiyeong Shin ,  Jaeseob Lee

IPC: H01L27/12 ,  G02F1/13 ,  H10K50/844 ,  G02F1/1333 ,  H10K50/816 ,  H10K50/828 ,  H10K50/842 ,  H10K59/35 ,  H10K59/126 ,  H10K102/00

CPC classification number: H10K50/844 ,  G02F1/133334 ,  G09G2300/0408 ,  G09G2300/0804 ,  H10K50/816 ,  H10K50/828 ,  H10K50/8426 ,  H10K59/126 ,  H10K59/35 ,  H10K2102/00 ,  H10K2102/351

Abstract: A display device includes: a base substrate including a first polymeric film; an active pattern on the base substrate and including a first channel region; and a first gate electrode overlapping the first channel region, wherein the first polymeric film has a first thickness in a first area overlapping the first channel region and a second thickness, which is smaller than the first thickness, in a second area different from the first area.

公开(公告)号：US11715421B2

公开(公告)日：2023-08-01

申请号：US17939721

申请日：2022-09-07

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0819 ,  G09G2330/021

Abstract: A pixel includes an organic light emitting diode that is configured to output light based on a driving current, and includes a first terminal and a second terminal. A driving transistor is configured to generate the driving current, and includes a first terminal to which a first power supply voltage and a bias power supply voltage are applied, a second terminal connected to the first terminal of the organic light emitting diode, and a gate terminal to which a first initialization voltage is applied. The first dual gate transistor is connected between the gate terminal of the driving transistor and the second terminal of the driving transistor. The first switching transistor includes a first terminal to which the bias power supply voltage is applied, a second terminal connected to the first terminal of the driving transistor, and a gate terminal to which a light emitting diode initialization signal is applied.

公开(公告)号：US10275094B2

公开(公告)日：2019-04-30

申请号：US15715590

申请日：2017-09-26

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim ,  Sooyoung Park ,  Joonghyun Park

IPC: G06F3/042 ,  G06F3/041 ,  H01L27/144

Abstract: A photo sensor pixel includes a pixel circuit including a driving transistor, a switching transistor having a double gate structure and a photo sensing transistor connected in series with the switching transistor. The pixel circuit drives a light emitting element therein based on a data voltage provided thereto through a data line, the switching transistor includes a top gate electrode and a bottom gate electrode, which are connected to different gate lines, respectively, and the photo sensing transistor senses incident light.

公开(公告)号：US10176778B2

公开(公告)日：2019-01-08

申请号：US15261779

申请日：2016-09-09

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：US12136391B2

公开(公告)日：2024-11-05

申请号：US17982931

申请日：2022-11-08

Applicant: Samsung Display Co., Ltd.

Inventor： Keunwoo Kim

IPC: G09G3/3233 ,  G09G3/30 ,  G09G3/32 ,  G09G3/3258

Abstract: A pixel circuit includes a light emitting element, a driving transistor which applies a driving current to the light emitting element, a write transistor which receives a write gate signal and a data voltage and is connected to a first electrode of the driving transistor, a first compensation transistor which receives a compensation gate signal and is connected to a second electrode of the driving transistor and a first electrode of a second compensation transistor, the second compensation transistor which receives the compensation gate signal, and is connected to the second electrode of the first compensation transistor and a control electrode of the driving transistor, a storage capacitor which receives a first power voltage and is connected to the control electrode of the driving transistor, and a node control transistor which receives the write gate signal and is connected to the second electrode of the first compensation transistor.

公开(公告)号：US12033546B2

公开(公告)日：2024-07-09

申请号：US18305156

申请日：2023-04-21

Applicant: Samsung Display Co., LTD.

Inventor： Keunwoo Kim ,  Taewook Kang

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0262 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247

Abstract: A display apparatus includes: a light emitting element; a driving switching element to apply a driving current to the light emitting element; and a first compensation switching element and a second compensation switching element connected in series to each other between a control electrode of the driving switching element and an output electrode of the driving switching element. A control electrode of the first compensation switching element and a control electrode of the second compensation switching element are to receive a compensation gate signal, and a falling waveform of the compensation gate signal and a rising waveform of the compensation gate signal are asymmetrical to each other.

公开(公告)号：US11538413B1

公开(公告)日：2022-12-27

申请号：US17701935

申请日：2022-03-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Keunwoo Kim ,  Meejae Kang ,  Dokyeong Lee ,  Taewook Kang

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291

Abstract: A pixel includes a display element, a driving transistor which controls an amount of a driving current flowing toward the display element, a first capacitor connected to a gate of the driving transistor, a scan transistor which transfers a data voltage to a source of the driving transistor, first and second compensation transistors connected to each other in series between the gate and a drain of the driving transistor, first and second emission control transistors which generates a path of the driving current between the display element and a power line, and a second capacitor connected between a floating node between the first and second compensation transistors and a gate of the second emission control transistor.

公开(公告)号：US20220398978A1

公开(公告)日：2022-12-15

申请号：US17701935

申请日：2022-03-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Keunwoo Kim ,  Meejae Kang ,  Dokyeong Lee ,  Taewook Kang

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291

Abstract: A pixel includes a display element, a driving transistor which controls an amount of a driving current flowing toward the display element, a first capacitor connected to a gate of the driving transistor, a scan transistor which transfers a data voltage to a source of the driving transistor, first and second compensation transistors connected to each other in series between the gate and a drain of the driving transistor, first and second emission control transistors which generates a path of the driving current between the display element and a power line, and a second capacitor connected between a floating node between the first and second compensation transistors and a gate of the second emission control transistor.

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.