公开(公告)号：US12175944B2

公开(公告)日：2024-12-24

申请号：US18145078

申请日：2022-12-22

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Seokgyu Ban ,  Wook Lee ,  Jaehoon Shin

IPC: G09G3/3291

Abstract: A display apparatus includes a display panel, a compensator, a controller, and a data driver. The compensator determines a degradation grayscale of a compensation region of the display panel. The degradation grayscale may be determined based on a driving time of at least one pixel in the compensation region and degradation data corresponding to the at least one pixel. The controller generates compensated image data for input image data based on the degradation grayscale. The data driver provides a data voltage to the at least one pixel based on the compensated image data.

公开(公告)号：US12033569B1

公开(公告)日：2024-07-09

申请号：US18205394

申请日：2023-06-02

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jung Ki Min ,  Wook Lee ,  Sang Jae Yeo

IPC: G09G3/32

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

Abstract: A display device includes a display unit, a scan driver, and a data driver. The display unit includes pixels coupled to scan lines, sensing scan lines, data lines, and sensing lines. The scan driver supplies a scan signal to the scan lines, and supplies a sensing scan signal to the sensing scan lines. The data driver supplies an image data voltage to the data lines, and detects sensing values of the pixels on a pixel column basis through the sensing lines during a sensing period. The data driver includes an analog-to-digital converter which converts the detected sensing values into digital data during the sensing period and outputs sensing data. The analog-to-digital converter pauses the detection of the sensing values during a first period of the sensing period.

公开(公告)号：US11922869B2

公开(公告)日：2024-03-05

申请号：US17983462

申请日：2022-11-09

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sunghoon Bang ,  Seokgyu Ban ,  Dong-Ki Eun ,  Seungho Park ,  Wook Lee

IPC: G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2310/061 ,  G09G2320/0257 ,  G09G2320/0271 ,  G09G2320/041

Abstract: A display device including: a display panel including a plurality of pixels; a display panel driver configured to drive the display panel; a memory device configured to store a reference current-temperature model that is set for the display panel, a global offset of the display panel, which is calculated based on the reference current-temperature model in a manufacturing stage of the display panel, and a local offset of the display panel, which is calculated based on a characteristic difference between the pixels in the manufacturing stage; and a panel temperature determiner configured to measure sensing currents flowing through the pixels when a temperature sensing voltage is applied to the pixels, calculate correction sensing currents by applying the global offset and the local offset to the sensing currents, and determine temperatures of the pixels by substituting the correction sensing currents into the reference current-temperature model.

公开(公告)号：US11626045B2

公开(公告)日：2023-04-11

申请号：US16783109

申请日：2020-02-05

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Wook Lee

IPC: G09G3/00 ,  G09G3/3241 ,  G09G3/3275 ,  G09G3/3266 ,  G09G3/3233

Abstract: A display device includes a display panel including a pixel electrically connected to a feedback line, a sensor electrically connected to the feedback line, the sensor being configured to measure an impedance of the pixel in response to a first control signal, and to measure a driving current flowing through the pixel in response to a second control signal, and a timing controller configured to selectively generate the first control signal and the second control signal based on an aging time of the display panel.

公开(公告)号：US11514847B2

公开(公告)日：2022-11-29

申请号：US17475617

申请日：2021-09-15

Applicant: Samsung Display Co., Ltd.

Inventor： Seok Gyu Ban ,  Kyung Man Kim ,  Wook Lee

IPC: G09G3/32

Abstract: A display device includes a display unit, a timing controller, a data driver, and a sensing unit. The display unit includes a data line, a sensing line, and a pixel that includes a light emitting element and a transistor for providing a driving current to the light emitting element. The timing controller generates a first voltage value by compensating a first grayscale value and generates a second voltage value by remapping the first voltage value from a first voltage range to in a second voltage range. The data driver generates a data voltage based on the second voltage value and supplies the data voltage to the data line. The sensing unit provides an initialization voltage to the sensing line. A voltage difference between the data voltage and a threshold voltage of the transistor is greater than or equal to the initialization voltage.

公开(公告)号：US11501716B2

公开(公告)日：2022-11-15

申请号：US17121097

申请日：2020-12-14

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Bo Young An ,  Wook Lee

IPC: G09G3/3266 ,  G09G3/3291

Abstract: A display device includes a display unit including a plurality of pixels and a sensing unit disposed outside the display unit, where the sensing unit senses deterioration information of a driving transistor in each of the pixels through a plurality of sensing lines, and compensates for deterioration of the driving transistor. the sensing unit senses the deterioration information during a first sensing period, and the first sensing period is included in each of a power-off period in which power for the display device to display an image is not supplied, a power-on period in which the display device is turned on, and an image display period in which the image is continuously displayed after the display device is turned on.

公开(公告)号：US10984717B2

公开(公告)日：2021-04-20

申请号：US15827624

申请日：2017-11-30

Applicant: Samsung Display Co. Ltd.

Inventor： Wook Lee

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

Abstract: An organic light-emitting display device includes a plurality of pixels, each of which is connected to a scan line, a data line, a first power line and a second power line, and includes a light-emitting diode. A voltage applied to an anode of the light-emitting diode is higher than a voltage applied to a cathode in a first operation period, and a voltage applied to the anode of the light-emitting diode is lower than a voltage applied to the cathode in at least a part of a second operation period different from the first operation period.

公开(公告)号：US10553156B2

公开(公告)日：2020-02-04

申请号：US16162105

申请日：2018-10-16

Applicant: Samsung Display Co., Ltd.

Inventor： Sang Jae Yeo ,  Wook Lee

IPC: G09G3/32 ,  G09G3/3233 ,  G09G3/3291 ,  G09G3/3266

Abstract: A display device includes: a first pixel row including n pixels coupled to a first scan line; a second pixel row including m pixels coupled to a second scan line; a first power voltage source for supplying a first power voltage to the pixels of the first pixel row and the second pixel row through a first power voltage line; a current sensor for sensing a value of a line current flowing between the first power voltage line and a selected pixel row among the first pixel row and the second pixel row; and a timing controller for calculating a converted current value of the selected pixel row, wherein n is a natural number, and m is a natural number greater than n.

公开(公告)号：US20200020278A1

公开(公告)日：2020-01-16

申请号：US16511378

申请日：2019-07-15

Applicant: Samsung Display Co., Ltd.

Inventor： Wook Lee

IPC: G09G3/3258 ,  G09G3/3275

Abstract: A display device includes: a pixel circuit including a switching transistor connected to a data line, a storage capacitor connected to the switching transistor, a driving transistor connected to the storage capacitor, an organic light-emitting diode connected to the driving transistor and a sensing transistor connected between a sensing line and the driving transistor; and a data-sensing circuit including a first selector connected to the data line and the sensing line, a second selector connected to an output terminal of an amplifier, he first selector and a feedback capacitor, where the second selector selectively connects the output terminal of the amplifier to the first selector and the feedback capacitor, a third selector connected to the sensing line, and a fourth selector connected to the output terminal of the amplifier and the third selector.

公开(公告)号：US09620058B2

公开(公告)日：2017-04-11

申请号：US14446879

申请日：2014-07-30

Applicant: Samsung Display Co., Ltd.

Inventor： Wook Lee

IPC: G09G3/3208 ,  G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2320/0295 ,  G09G2320/041

Abstract: An organic light emitting display device includes pixels, a data driver, a scan driver, a control line driver and a temperature estimating unit. The pixels are respectively disposed at intersection portions of data lines, scan lines, sensing control lines and emission control lines. The data driver supplies data signals to the data lines. The scan driver progressively supplies a scan signal to the scan lines. The control line driver progressively supplies a sensing control signal to the sensing control lines during a temperature sensing period, and progressively supplies an emission control signal to the emission control lines during a normal driving period. The temperature estimating unit estimates temperatures of the pixels according to the amplitudes of currents supplied from the pixels through data lines during the temperature sensing period.