公开(公告)号：US11501699B1

公开(公告)日：2022-11-15

申请号：US17683763

申请日：2022-03-01

Applicant: Samsung Display Co., Ltd.

Inventor： Yang-Hwa Choi ,  Junghwan Hwang

IPC: G09G3/32

Abstract: A display device includes a display panel including a pixel and a panel driver which drives the display panel at a first panel frequency in a first driving mode and drives the display panel at a second panel frequency in a second driving mode. The pixel includes a light emitting element and first, second, third, and fourth transistors. The first transistor is connected between a power line and the light emitting element. The second transistor is connected between a data line and the first transistor and receives a first scan signal. The third transistor is connected between the first transistor and an initialization voltage line and receives a second scan signal. The fourth transistor is connected between the first transistor and a reset voltage line and receives a third scan signal. The third scan signal is inactivated in the first driving mode and is activated in the second driving mode.

公开(公告)号：US20220351680A1

公开(公告)日：2022-11-03

申请号：US17707906

申请日：2022-03-29

Applicant: Samsung Display Co., Ltd.

Inventor： Yang-Hwa Choi ,  Hyuk Kim ,  Junghwan Hwang

IPC: G09G3/3233

Abstract: An electronic device includes a pixel driving circuit to operate in a light emitting mode or a sensing mode and including a reference voltage line for receiving a reference voltage comprising a first reference voltage and a second reference voltage different from the first reference voltage and a light emitting diode including a first electrode, a light emitting element, and a second electrode. The light emitting diode has in an on-state or an off-state in the light emitting mode, the first reference voltage is applied to the reference voltage line in the light emitting mode, a first voltage is applied to the first electrode in the off-state, a second voltage is applied to the first electrode in the on-state, the sensing mode includes an initialization period and a sensing period, and the second reference voltage is applied to the reference voltage line in the initialization period.

公开(公告)号：US10515592B2

公开(公告)日：2019-12-24

申请号：US16043739

申请日：2018-07-24

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yanguk Nam ,  Dae-sik Lee ,  Yoomi Kim ,  Junghwan Hwang

IPC: G09G3/3258 ,  G09G3/3233 ,  H01L27/32 ,  G09G3/36

Abstract: A display device includes: a display panel including data lines, gate lines, and pixels, the display panel is operated in an active period or in a blank period; and a driving circuit for driving the display panel, the driving circuit including: a signal controller for outputting clock control signals; a voltage generator for receiving the clock control signals, wherein the voltage generator outputs active clock signals synchronized with the clock control signals during the active period and outputs blank clock signals during the blank period; and an overcurrent detection circuit for receiving the clock control signals and the blank clock signals, the overcurrent detection circuit detects an overcurrent of the blank clock signals, and a phase difference between the clock control signals in the active period is different from a phase difference between the clock control signals in the blank period.

公开(公告)号：US10460691B2

公开(公告)日：2019-10-29

申请号：US15162499

申请日：2016-05-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Junghwan Hwang ,  Chanwook Shim ,  Youngchul Jo

IPC: G09G3/36

Abstract: A display device to display an image during frame intervals, and to display a blank image during a blank interval defined between the frame intervals, includes: a gate driving circuit including a plurality of stages, an ith stage (i is an integer greater than or equal to 2) from among the plurality of stages including a clock terminal to receive a clock signal, wherein the clock signal swings between a first clock voltage and a second clock voltage smaller than the first clock voltage during a normal interval corresponding to each of the frame intervals, and the clock signal is changed to a voltage lower than the second clock voltage during a stabilization interval corresponding to the blank interval.

公开(公告)号：US11798475B2

公开(公告)日：2023-10-24

申请号：US17707906

申请日：2022-03-29

Applicant: Samsung Display Co., Ltd.

Inventor： Yang-Hwa Choi ,  Hyuk Kim ,  Junghwan Hwang

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3283

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3283 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2320/0233 ,  G09G2320/043

Abstract: An electronic device includes a pixel driving circuit to operate in a light emitting mode or a sensing mode and including a reference voltage line for receiving a reference voltage comprising a first reference voltage and a second reference voltage different from the first reference voltage and a light emitting diode including a first electrode, a light emitting element, and a second electrode. The light emitting diode has in an on-state or an off-state in the light emitting mode, the first reference voltage is applied to the reference voltage line in the light emitting mode, a first voltage is applied to the first electrode in the off-state, a second voltage is applied to the first electrode in the on-state, the sensing mode includes an initialization period and a sensing period, and the second reference voltage is applied to the reference voltage line in the initialization period.

公开(公告)号：US11790855B2

公开(公告)日：2023-10-17

申请号：US17720907

申请日：2022-04-14

Applicant: Samsung Display Co., Ltd.

Inventor： Yang-Hwa Choi ,  Hyuk Kim ,  Junghwan Hwang

IPC: G09G3/30 ,  G09G3/3266 ,  G09G3/3225 ,  G09G3/3258 ,  G09G3/3233 ,  G09G3/3291

CPC classification number: G09G3/3266 ,  G09G3/3225 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3291 ,  G09G2300/0417 ,  G09G2300/0842 ,  G09G2310/021 ,  G09G2310/0243 ,  G09G2310/0251 ,  G09G2310/0286 ,  G09G2310/061 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/0261 ,  G09G2320/0295 ,  G09G2320/043

Abstract: A display device includes a plurality of pixels connected to a plurality of first scan lines, a plurality of second scan lines, and a plurality of data lines, where the pixels are arranged in a plurality of rows, a plurality of first stages connected to the first scan lines, a plurality of second stages connected to the second scan lines, and a data driver connected to the data lines. Each of the first scan lines is connected to pixels arranged in a corresponding row among the rows. Each of the second scan lines is commonly connected to pixels arranged in corresponding 8h rows among the plurality of rows, where h is a natural number.

公开(公告)号：US10748471B2

公开(公告)日：2020-08-18

申请号：US16234446

申请日：2018-12-27

Applicant: Samsung Display Co., LTD.

Inventor： Junghwan Hwang

IPC: G09G3/20

Abstract: A gate driving circuit comprising stages cascade-connected with each other and configured to output gate signals, a stage of the stages including a pull-up circuit configured to output a high voltage of a clock signal as a high voltage of a gate signal in response to a bootstrap voltage of a control node in a period of a frame period, a first discharging circuit configured to discharge a voltage of the control node to a first low voltage in response to a carry signal of at least one stage of the plurality of stages that is subsequent to the stage, and a second discharging circuit configured to discharge a voltage of the control node to a second low voltage being lower than the first low voltage in response to a carry signal of at least one stage of the plurality of stages that is subsequent to the stage.

公开(公告)号：US10733950B2

公开(公告)日：2020-08-04

申请号：US16518710

申请日：2019-07-22

Applicant: Samsung Display Co., Ltd.

Inventor： Junghwan Hwang ,  Sehyoung Cho

IPC: G09G3/36

Abstract: A gate driving circuit includes: a plurality of stages to provide gate signals to gate lines of a display panel, a k-th stage, where k is a natural number greater than or equal to 2, from among the plurality of stages being configured: to receive a clock signal, a (k−1)th carry signal from a (k−1)th stage, a (k+1)th carry signal from a (k+1)th stage, a (k+2)th carry signal from a (k+2)th stage, a first voltage, and a second voltage, the clock signal being a pulse signal in which a high voltage and a third voltage appear periodically, and the third voltage having a lower voltage level than those of the first voltage and the second voltage; and to output a k-th gate signal and a k-th carry signal.

公开(公告)号：US10360863B2

公开(公告)日：2019-07-23

申请号：US15227924

申请日：2016-08-03

Applicant: Samsung Display Co., Ltd.

Inventor： Junghwan Hwang ,  Sehyoung Cho

IPC: G09G3/36

Abstract: A gate driving circuit includes: a plurality of stages to provide gate signals to gate lines of a display panel, a k-th stage, where k is a natural number greater than or equal to 2, from among the plurality of stages being configured: to receive a clock signal, a (k−1)th carry signal from a (k−1)th stage, a (k+1)th carry signal from a (k+1)th stage, a (k+2)th carry signal from a (k+2)th stage, a first voltage, and a second voltage, the clock signal being a pulse signal in which a high voltage and a third voltage appear periodically, and the third voltage having a lower voltage level than those of the first voltage and the second voltage; and to output a k-th gate signal and a k-th carry signal.

公开(公告)号：US11749206B2

公开(公告)日：2023-09-05

申请号：US17657256

申请日：2022-03-30

Applicant: Samsung Display Co., Ltd.

Inventor： Hyuk Kim ,  Yanghwa Choi ,  Junghwan Hwang

IPC: G09G3/3266 ,  G09G3/3233

CPC classification number: G09G3/3266 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2360/16

Abstract: A display apparatus includes: a pixel part including a plurality of pixels, each of the plurality of pixels to receive a first scan signal and an emission signal; and a scan driver to output the first scan signal and the emission signal to each of the plurality of pixels. In a second driving mode in which the display apparatus is driven with a first driving frequency lower than a maximum driving frequency, the scan driver is to supply the first scan signal to the plurality of pixels according to the first driving frequency, and supply the emission signal to the plurality of pixels according to the maximum driving frequency.