公开(公告)号：US11972721B2

公开(公告)日：2024-04-30

申请号：US17948787

申请日：2022-09-20

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Kyoung Ho Lim ,  Seung Ho Park ,  Hee Sook Park ,  Sang Myeon Han

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2320/0233 ,  G09G2320/0257 ,  G09G2320/0271 ,  G09G2320/043

Abstract: A display device is disclosed that includes pixels, a memory, and a degradation compensator. The pixels include light emitting elements. The memory is operable to store degradation information including degradation degrees of the light emitting elements. The degradation compensator is operable to receive the degradation information and generate output grayscales by changing each of input grayscales of the pixels in proportion to each of the degradation degrees. The degradation compensator includes a degradation information changer for changing the degradation information by decreasing a degradation degree having a variation greater than a threshold value among variations of the degradation degrees.

公开(公告)号：US11670212B2

公开(公告)日：2023-06-06

申请号：US17523218

申请日：2021-11-10

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jae Hoon Lee ,  Seung Ho Park ,  Jin Ho Lee ,  Sang Myeon Han

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/0257 ,  G09G2320/048

Abstract: An image sticking compensation device includes: a deterioration calculator which calculates deterioration data of a current frame based on input image data and sensing frequency information which are received from a timing controller; an accumulator which accumulates the deterioration data and generates age data in which the deterioration data is accumulated; and a compensator which determines a grayscale compensation value corresponding to the age data and an input grayscale value of the input image data, and outputs age compensation data by applying the grayscale compensation value to the input image data. The sensing frequency information includes a frequency of the current frame, and the deterioration data varies in accordance with the frequency of the current frame.

公开(公告)号：US11651738B2

公开(公告)日：2023-05-16

申请号：US17367399

申请日：2021-07-04

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Kuk Hwan Ahn ,  Seok Ha Hong

IPC: G09G3/3266 ,  G09G3/3275 ,  G09G3/3233

CPC classification number: G09G3/3266 ,  G09G3/3233 ,  G09G3/3275 ,  G09G2310/0248 ,  G09G2310/08 ,  G09G2330/08 ,  G09G2330/10

Abstract: An nth (where n is a natural number) stage is included in a scan driver of a display. The nth stage includes: a first input circuit for controlling a voltage of a first node in response to a carry signal of a previous stage; a second input circuit for controlling the voltage of the first node in response to a carry signal of a next stage; a first control circuit for controlling a voltage of an output terminal in response to the carry signal of the next stage; an output circuit for outputting an nth scan signal and an nth carry signal in response to the voltage of the first node and a voltage of a second node; and a leakage control circuit for supplying a control voltage to the first input circuit and the second input circuit in response to one of the nth scan signal and the nth carry signal.

公开(公告)号：US10672357B2

公开(公告)日：2020-06-02

申请号：US15801951

申请日：2017-11-02

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Soo-Yeon Lee ,  Seok Ha Hong ,  Bong Hyun You ,  Jai-Hyun Koh

IPC: G09G3/36

Abstract: A stage of a gate driving circuit includes: a first control transistor diode-connected between a first input end of the stage and a first node, biased by a first input signal, and back-biased by a second input signal; a second control transistor including a control end which receives a third input signal, a first end connected to the first node, and a second end connected to a first voltage, and back-biased by a fourth input signal; a first output transistor including a control end connected to the first node, a first end connected to a clock input end of the stage, and a second end connected to a first output end of the stage; and a capacitor connected between the control and second ends of the first output transistor. The second input signal and the fourth input signal have enable levels during different periods.

公开(公告)号：US20200058251A1

公开(公告)日：2020-02-20

申请号：US16412663

申请日：2019-05-15

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Dong Hak Pyo ,  Seung Ho Park ,  Kyoung Ho Lim ,  Sang Myeon Han

IPC: G09G3/3225 ,  G09G3/36

Abstract: A display device and a method of driving the same. The display device includes a display panel including a plurality of pixels, a degradation compensator configured to output compensation data based on age values of the plurality of pixels and an input grayscale value of input image data, a scan driver configured to supply a scan signal to the display panel, and a data driver configured to supply a data signal corresponding to the compensation data to the display panel. The degradation compensator includes a first compensation unit configured to generate a first compensation grayscale value with reference to the input grayscale value and a first age value, and a second compensation unit configured to generate a second compensation grayscale value with reference to the first compensation grayscale value and the first age value.

公开(公告)号：US10062328B2

公开(公告)日：2018-08-28

申请号：US15222582

申请日：2016-07-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jae Hoon Lee ,  Jin Woo Kim ,  Do Hyung Ryu ,  Jae Woo Song ,  Hae Goo Jung

IPC: G06F3/038 ,  G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2320/0271 ,  G09G2320/0285 ,  G09G2320/045 ,  G09G2320/046 ,  G09G2320/048 ,  G09G2330/028

Abstract: An organic light emitting display device includes: pixels including driving transistors positioned in regions divided by scan lines and data lines; a data accumulating unit arranged to accumulate first data; a first storage unit storing current and voltage change information corresponding to a degradation of an organic light emitting diode (OLED); a second storage unit storing a compensation value corresponding at least partially to channel length modulation of the driving transistors; and a timing controller programmed to carry out an altering of first data corresponding to an ith pixel so as to generate second data to be supplied to the ith pixel, the altering carried out according to: accumulation stress information for the ith pixel, the accumulation stress information corresponding to the accumulated first data and being stored in the data accumulating unit, the current and voltage change information, and a compensation value corresponding to the ith pixel.

公开(公告)号：US10019939B2

公开(公告)日：2018-07-10

申请号：US15140332

申请日：2016-04-27

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Seung Ho Park ,  Do Hyung Ryu ,  Jae Woo Song ,  Hae Goo Jung

IPC: G09G3/32 ,  G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2320/0238 ,  G09G2320/0271 ,  G09G2320/041 ,  G09G2320/048 ,  G09G2320/0686

Abstract: An organic light emitting display device includes a display panel having pixels and a display panel driver driving the display panel. Each of the pixels includes an organic light emitting diode, and the display panel driver selects one of the pixels, determines a reference grayscale value, compares a grayscale value, and determines the selected pixel as a low grayscale pixel when the grayscale value is lower than the reference grayscale value and higher than a black grayscale value. Some of the low grayscale pixels display the black grayscale value when there are more than one neighboring low grayscale pixels. The reference grayscale value is determined based on a reference grayscale variable, and the reference grayscale variable includes at least one of a temperature of the display panel, a time period when the selected pixel emits light, and a wavelength of light emitted by the selected pixel.

公开(公告)号：US09437166B2

公开(公告)日：2016-09-06

申请号：US14451802

申请日：2014-08-05

Applicant: Samsung Display Co., Ltd.

Inventor： Jun-Yong Song ,  Jae Hoon Lee

IPC: G09G3/36 ,  G09G5/18 ,  G09G3/20

CPC classification number: G09G5/18 ,  G09G3/20 ,  G09G2300/0408 ,  G09G2310/0267 ,  G09G2310/0283 ,  G09G2310/0286 ,  G09G2310/08

Abstract: A scan driver includes stages dependently connected to each other, where each of the stages outputs a gate signal, where a first scanning start signal is input to a first stage of the stages, where a second scanning start signal is input to a last stage of the stages, where each of the first scanning start signal and the second scanning start signal has one pulse per frame, where the stages sequentially output a gate-on voltage between a time when a pulse of the first scanning start signal for a frame is input to the first stage and a time when a pulse of the second scanning start signal for the frame is input to the last stage, and where the stages output a first low voltage lower than the gate-on voltage after the pulse of the second scanning start signal for the frame is input to the last stage.

Abstract translation: 扫描驱动器包括依赖于彼此连接的级，其中每个级输出门信号，其中第一扫描开始信号被输入到级的第一级，其中第二扫描开始信号被输入到最后级 其中第一扫描开始信号和第二扫描开始信号中的每一个每帧具有一个脉冲，其中级在输入帧的第一扫描开始信号的脉冲的时间之间顺序地输出栅极导通电压 到第一级，并且将帧的第二扫描开始信号的脉冲输入到最后级的时间，并且其中级在第二扫描开始的脉​​冲之后输出低于栅极导通电压的第一低电压 帧的信号被输入到最后阶段。

公开(公告)号：US11670228B2

公开(公告)日：2023-06-06

申请号：US17952314

申请日：2022-09-26

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Jung Taek Kim

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2310/0278 ,  G09G2310/08 ,  G09G2320/0271

Abstract: A display device includes: a display unit including a scan line, a data line, and a pixel connected to the scan line and the data line; a scan driver for supplying a scan signal to the scan line; a data driver for supplying a data signal to the data line in a display mode, supplying a first voltage and a second voltage to the data line respectively during a first period and a second period in a sensing mode, and outputting a first sensing signal and a second sensing signal by sensing a driving current of the pixel during the first period and the second period; and a timing controller for converting first image data into second image data, based on the first sensing signal and the second sensing signal.

公开(公告)号：US11574591B2

公开(公告)日：2023-02-07

申请号：US17381134

申请日：2021-07-20

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Myeong Su Kim ,  Jae Woo Ryu

IPC: G09G3/3233 ,  G09G3/3275 ,  G09G3/3266

Abstract: A display device includes pixels connected to scan lines, sensing lines, readout lines, and data lines; a scan driver including stages to supply a scan signal and a sensing signal to the scan lines and the sensing lines; a data driver which supplies a data signal to the data lines; a timing controller which divides one frame into an active period including a scan period in which the data signal is supplied to the data lines and a display period in which the pixels emit light in response to the data signal, and a blank period including a sensing period in which electrical characteristics of the pixels are detected and a reset period in which the stages are reset; and a compensator which generates a compensation value for compensating for deterioration of the pixels based on sensing values provided from the readout lines during the sensing period.