公开(公告)号：US20210312855A1

公开(公告)日：2021-10-07

申请号：US17078378

申请日：2020-10-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Minjae Jeong ,  Joonho Lee ,  Keechan Park ,  Kyunghoon Chung ,  Chongchul Chai

IPC: G09G3/32

Abstract: A display panel, a pixel circuit, and a display device are disclosed. The display panel includes sub-pixels and a driver driving the sub-pixels. Each sub-pixel includes: an emission element; a first transistor configured to generate a driving current; a constant current control circuit configured to receive a reference voltage and a bias voltage for setting a value of the driving current and including a first capacitor configured to store a first compensation voltage generated by adding a threshold voltage of the first transistor to a difference between the bias voltage and the reference voltage; and a pulse width control circuit configured to receive a data voltage used to determine an emission duration of the emission element and including a second transistor configured to control a pulse width of the driving current according to the data voltage and a second capacitor configured to store a second compensation voltage corresponding to a threshold voltage of the second transistor.

公开(公告)号：US10792709B2

公开(公告)日：2020-10-06

申请号：US15828202

申请日：2017-11-30

Applicant: Samsung Display Co., Ltd.

Inventor： Jinseok Son ,  Myungkyu Kim ,  Kyunghoon Chung

IPC: B08B3/02 ,  B08B7/00 ,  B08B7/04 ,  B08B3/08 ,  C23C14/04 ,  H05B33/10 ,  H01L51/52 ,  H01L51/56 ,  H01L51/00

Abstract: A mask cleaning apparatus and method of using the same includes a preheating zone preheating a mask, a first ultraviolet cleaning zone irradiating the mask with a first ultraviolet laser beam at a first irradiation angle, a first cooling zone cooling the mask irradiated with the first ultraviolet laser beam, a second ultraviolet cleaning zone irradiating the mask with a second ultraviolet laser beam at a second irradiation angle, a second cooling zone cooling the mask irradiated with the second ultraviolet laser beam, an infrared cleaning zone irradiating the mask with an infrared laser beam at a third irradiation angle, and a peeling zone spraying air onto the mask irradiated with the infrared laser beam.

公开(公告)号：US10262585B2

公开(公告)日：2019-04-16

申请号：US14936553

申请日：2015-11-09

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Takahiro Senda ,  Kyunghoon Chung

IPC: G09G3/32 ,  G09G3/3233 ,  G09G3/20 ,  G09G3/3291

Abstract: An organic light-emitting display apparatus includes an organic light-emitting diode, a driving transistor arranged to receive a first driving voltage and to supply a driving current to the organic light-emitting diode, a data line arranged to transfer a sustain voltage and a data voltage, a sensing transistor which is connected to the data line, and which is arranged to transfer the sustain voltage to an anode of the organic light-emitting diode in response to a sensing control signal, a switching transistor which is connected to the data line, and which is arranged to transfer the data voltage to the driving transistor in response to a scan signal, and a data compensation unit arranged to compensate image data according to characteristic information of the organic light-emitting diode, the characteristic information transmitted to the data compensation unit through the sensing transistor and the data line.

公开(公告)号：US12207499B2

公开(公告)日：2025-01-21

申请号：US17747060

申请日：2022-05-18

Applicant: Samsung Display Co., Ltd. ,  IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)

Inventor： Oh-Kyong Kwon ,  Minjae Jeong ,  Kyunghoon Chung

IPC: G09G3/3266 ,  G09G3/3275 ,  H10K59/121 ,  H10K59/131

Abstract: A pixel including: a light emitting diode; a first capacitor connected between first and second nodes; a second capacitor connected between the second node and a third node; a first transistor including a first electrode connected to the second node, a second electrode connected to an anode of the light emitting diode, and a gate electrode connected to the first node; a second transistor including a first electrode connected to the third node, a second electrode connected to a reference voltage line, and a gate electrode connected to a first scan line; a third transistor including a first electrode electrically connected to the first node, a second electrode connected to the reference voltage line, and a gate electrode connected to a second scan line; and a fourth transistor including a first electrode connected to a data line, a second electrode connected to the third node, and a gate electrode connected to a third scan line.

公开(公告)号：US20240355270A1

公开(公告)日：2024-10-24

申请号：US18492823

申请日：2023-10-24

Applicant: Samsung Display Co., LTD. ,  Research & Business Foundation SUNGKYUNKWAN UNIVERSITY

Inventor： Haemin Kim ,  Yong-Sang Kim ,  Kyunghoon Chung ,  Eun Kyo Jung ,  Hwarim Im

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0426 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0286 ,  G09G2310/08 ,  G09G2320/0214

Abstract: An emission driving circuit comprises a pull-up circuit configured to output a first power voltage as an emission signal in response to a voltage of a pull-up control node, a first pull-down control circuit configured to control a voltage of a pull-down control node in response to the voltage of the pull-up control node, and a pull-down circuit configured to output a second power voltage as the emission signal in response to the voltage of the pull-down control node, wherein the first pull-down control circuit comprises a first transistor and a second transistor which are electrically connected in series.

公开(公告)号：US11942029B2

公开(公告)日：2024-03-26

申请号：US18203158

申请日：2023-05-30

Applicant: Samsung Display Co., LTD. ,  IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)

Inventor： Byungchang Yu ,  Oh-Kyong Kwon ,  Kyunghoon Chung

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2320/0247

Abstract: A display device includes a pixel. The pixel includes a light-emitting element, a first capacitor, and first to fifth transistors. The first transistor is connected between a first voltage line receiving a first driving voltage and the light-emitting element, and operates in response to a potential of a first node, and the second transistor is connected between a data line and the first node, and receives a first scan signal. The first capacitor is connected between the first node and a second node, and the third transistor is connected between the first transistor and the first node, and receives a second scan signal. The fourth transistor is connected between a reference voltage line and the first node, and receives a third scan signal, and the fifth transistor is connected between the first transistor and the second node, and receives an emission control signal.

公开(公告)号：US20230363206A1

公开(公告)日：2023-11-09

申请号：US18179969

申请日：2023-03-07

Applicant: Samsung Display Co., Ltd.

Inventor： Haemin Kim ,  Bonyong Koo ,  Myunghoon Park ,  Byungchang Yu ,  Donghoon Lee ,  Kyunghoon Chung

IPC: H10K59/121 ,  H10K59/131 ,  H10K59/124 ,  H10K59/123

CPC classification number: H10K59/1216 ,  H10K59/131 ,  H10K59/124 ,  H10K59/123 ,  H10K59/1213 ,  G09G2300/0852 ,  G09G2300/0426 ,  G09G3/3241

Abstract: A display apparatus includes a first capacitor electrode, a second capacitor electrode over the first capacitor electrode and overlapping the first capacitor electrode, a power voltage line over the second capacitor electrode and electrically connected to the second capacitor electrode, a connection electrode at a same layer as the power voltage line, the connection electrode being electrically connected to the first capacitor electrode, and a pixel electrode over the connection electrode and electrically connected to the connection electrode. A high-quality image may be displayed on the display apparatus.

公开(公告)号：US11626467B2

公开(公告)日：2023-04-11

申请号：US17152934

申请日：2021-01-20

Applicant: Samsung Display Co., Ltd.

Inventor： Sunhwa Lee ,  Mukyung Jeon ,  Hyeongseok Kim ,  Gyungsoon Park ,  Youngwan Seo ,  Kyunghoon Chung

IPC: H01L27/32 ,  G09G3/3258

Abstract: A display panel includes a first display area having a first light transmittance and a second display area having a second light transmittance that is higher than the first light transmittance. The display panel further comprises a plurality of first pixels disposed in the first display area and a plurality of second pixels disposed in the second display area. A first power line is connected to the plurality of first pixels. The first power line is configured to provide a first power voltage. A second power line is connected to the plurality of second pixels. The second power line is configured to provide a second power voltage having a voltage level that is different from a voltage level of the first power voltage.

公开(公告)号：US11217154B2

公开(公告)日：2022-01-04

申请号：US17147768

申请日：2021-01-13

Applicant: SAMSUNG DISPLAY CO., LTD. ,  KONKUK UNIVERSITY INDUSTRIAL COOPERATION CORP

Inventor： Minjae Jeong ,  Keechan Park ,  Joonho Lee ,  Kyunghoon Chung ,  Chongchul Chai

IPC: G09G3/36 ,  H03K3/0233 ,  G09G3/32

Abstract: A display panel includes sub-pixels each including a light-emitting element and a pixel circuit including a first transistor and a second transistor; a timing control unit to generate bias data based on first characteristic information of the first transistor, and generate correction data based on second characteristic information of the second transistor; and a data sensing driving unit configured to receive the bias data and the correction data, and output a bias voltage and a grayscale voltage to the pixel circuit. The pixel circuit includes the first transistor to output a driving current to the light-emitting element; a first driving circuit to control a magnitude of the driving current based on the bias voltage; and a second driving circuit including the second transistor and configured to control a pulse width of the driving current based on the grayscale voltage.

公开(公告)号：US12243491B2

公开(公告)日：2025-03-04

申请号：US18339558

申请日：2023-06-22

Applicant: Samsung Display Co., Ltd.

Inventor： Haemin Kim ,  Youngwan Seo ,  Byungchang Yu ,  Geunho Lee ,  Kyunghoon Chung

IPC: G09G3/3266

Abstract: A display panel includes a scan driving circuit. The scan driving circuit includes a first transistor that outputs a high-voltage of a scan signal during a turn-on period. The first transistor includes a first semiconductor pattern layer including a first input region, a first output region, and a first channel region, a first gate electrode overlapping the first channel region, a second semiconductor pattern layer including a second input region electrically connected to the first input region, a second output region electrically connected to the first output region, and a second channel region overlapping the first channel region, and a second gate electrode overlapping the second channel region, and electrically connected to the first gate electrode.