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    Display device and method of driving display device
    2.
    发明授权
    Display device and method of driving display device 有权

    公开(公告)号：US11367379B1

    公开(公告)日：2022-06-21

    申请号：US17409865

    申请日：2021-08-24

    Applicant: Samsung Display Co., Ltd.

    Inventor： Se Hyuk Park ,  Jae Keun Lim ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee

    IPC: G09G3/20

    Abstract: A display device according to an embodiment of the disclosure includes a timing controller, a scan driver including a plurality of stages connected to a plurality of clock signal lines and generating a plurality of scan signals in response to the scan start signal, a data driver configured to generate a plurality of data signals based on the image data, and a pixel portion including a plurality of pixels. One stage in the scan driver transmits a carry signal to 2n-th next stage. The timing controller selects any one of a normal frequency and low frequencies lower than the normal frequency as a driving frequency based on the input image data, and adjusts a clock duty of the plurality of clock signals so that a time required to output all of the plurality of scan signals during one frame is constant irrespective of the driving frequency.

    Display device and dimming driving method thereof
    3.
    发明授权
    Display device and dimming driving method thereof 有权

    公开(公告)号：US12002413B2

    公开(公告)日：2024-06-04

    申请号：US18176910

    申请日：2023-03-01

    Applicant: Samsung Display Co., LTD.

    Inventor： Hong Soo Kim ,  Myung Woo Lee ,  Suk Hun Lee

    IPC: G09G3/32

    CPC classification number: G09G3/32 ,  G09G2320/0633 ,  G09G2330/028

    Abstract: A display device comprises a pixel configured to be driven in cycle periods during a frame period defined by a vertical start signal, and a display driver configured to divide a cycle period into subfields for driving, configured to control an amount of current flowing through the pixel and to control emission on-duties of the subfields, and configured to independently determine, for the cycle period, a reference duty that is a minimum emission on-duty set in the cycle period based on a dimming signal.

    Display device
    5.
    发明授权
    Display device 有权

    公开(公告)号：US11610537B2

    公开(公告)日：2023-03-21

    申请号：US17535340

    申请日：2021-11-24

    Applicant: Samsung Display Co., Ltd.

    Inventor： Jae Keun Lim ,  Hong Soo Kim ,  Jin Young Roh ,  Se Hyuk Park ,  Woo Mi Bae ,  Hyo Jin Lee

    IPC: G09G3/32

    Abstract: Provided is a display device comprising a pixel unit including first pixel rows connected to first scan lines and second pixel rows alternating with the first pixel rows and connected to second scan lines, a scan driver including first scan stages connected to the first scan lines and second scan stages connected to the second scan lines, and an emission driver including emission stages in which each of emission lines is connected to two or more pixel rows. Accordingly, the display device is capable of changing a display frequency and maintaining the same cycle in which luminance decreases when the display frequency is changed.

    Display device and driving method thereof
    6.
    发明授权
    Display device and driving method thereof 有权

    公开(公告)号：US11587514B2

    公开(公告)日：2023-02-21

    申请号：US17583938

    申请日：2022-01-25

    Applicant: Samsung Display Co., Ltd.

    Inventor： Jin Young Roh ,  Hong Soo Kim ,  Se Hyuk Park ,  Hyo Jin Lee ,  Jae Keun Lim

    IPC: G09G3/3291 ,  G09G3/3266

    Abstract: Embodiments of the present disclosure relate to a display device and a driving method thereof, and the display device includes a demultiplexer connected to a first data line and transferring a data signal from the first data line to a plurality of second data lines during a data writing period of one frame, a compensator calculating an on-pixel ratio (OPR) using input data in the one frame and generating compensation data corresponding to a calculated OPR, and a data driver supplying the data signal to the first data line using the input data during the data writing period, and supplying a compensation data signal to the first data line using the compensation data in a blank period of the one frame, and the demultiplexer supplies the compensation data signal from the first data line to a second data line during the blank period.

    Display device and driving method thereof
    7.
    发明授权
    Display device and driving method thereof 有权

    公开(公告)号：US11482157B2

    公开(公告)日：2022-10-25

    申请号：US17535331

    申请日：2021-11-24

    Applicant: Samsung Display Co., Ltd.

    Inventor： Jae Keun Lim ,  Hong Soo Kim ,  Jin Young Roh ,  Se Hyuk Park ,  Hyo Jin Lee

    IPC: G09G3/20

    Abstract: Provided is a display device including a pixel unit in which each of pixel rows extends in a first direction, odd numbered pixel rows and even numbered pixel rows are alternately disposed in a second direction, and pixels included in the pixel rows are designated as dots having two or more units, a gray difference calculator that calculates difference between representative grays of dots adjacent in the second direction among dots of a p-th pair of the pixel rows, an edge detector that increases an edge dot number when a first condition in which the difference between the representative grays is larger than a first threshold value is satisfied, and a first pattern detector that increases an edge number when the edge dot number is larger than a second threshold value, and that generates a first pattern detection signal when the edge number is larger than a third threshold value.

    Display apparatus and method of driving display panel using the same
    8.
    发明授权
    Display apparatus and method of driving display panel using the same 有权

    公开(公告)号：US11195468B2

    公开(公告)日：2021-12-07

    申请号：US17014969

    申请日：2020-09-08

    Applicant: Samsung Display Co., Ltd.

    Inventor： Se Hyuk Park ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim

    IPC: G09G3/36 ,  G09G3/3258 ,  G09G3/3291 ,  H01L27/32 ,  H01L29/786 ,  H01L27/12

    Abstract: A display apparatus includes a display panel, a first gate driver, a second gate driver, a third gate driver, and a data driver. The display apparatus is operable in a low frequency driving mode, and the low frequency driving mode includes a writing frame and a holding frame. At least one of gate power voltages used to generate a first gate signal, a second gate signal, and an emission signal has a first voltage level in the writing frame of the low frequency driving mode and a second voltage level in the holding frame of the low frequency driving mode. The data voltage is applied to the pixel in the writing frame of the low frequency driving mode. The data voltage applied to the pixel in the writing frame of the low frequency driving mode is maintained in the holding frame of the low frequency driving mode.

    Display device having variable power sources
    10.
    发明授权
    Display device having variable power sources 有权

    公开(公告)号：US11158262B2

    公开(公告)日：2021-10-26

    申请号：US16445755

    申请日：2019-06-19

    Applicant: SAMSUNG DISPLAY CO., LTD.

    Inventor： Bon Seog Gu ,  Hong Soo Kim ,  Woo Mi Bae ,  Ki Wan Ahn ,  Joo Sun Yoon ,  Chong Chul Chai

    IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3275

    Abstract: A display device includes a display panel including pixels; a panel driver to supply a scan signal and a data signal to the pixels; and a power supply to generate a first supply voltage and a second supply voltage, and to change the first supply voltage and/or the second supply voltage to provide it to the pixels. The pixels emit light in response to the scan signal based on the data signal during an emission period where a voltage difference between the first supply voltage and the second supply voltage is larger than a first reference voltage. A first voltage difference between the first supply voltage and the second supply voltage at a start of the emission period is larger than an average voltage difference between the first supply voltage and the second supply voltage throughout the emission period.

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