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    Gamma voltage generation circuit and display device including the same
    2.
    发明授权
    Gamma voltage generation circuit and display device including the same 有权

    公开(公告)号：US12170049B2

    公开(公告)日：2024-12-17

    申请号：US18232573

    申请日：2023-08-10

    Applicant: SAMSUNG DISPLAY CO., LTD.

    Inventor： Se Byung Chae ,  Su Bin Kim ,  Jin Young Jeon

    IPC: H01M10/0585 ,  G09G3/20 ,  G09G3/32

    Abstract: A display device includes a display unit including a pixel which displays an image based on a first power voltage and a data signal, a gamma voltage generator which generates gamma voltages, and a data driver which generates the signal using the gamma voltages and provides the data signal to the pixel. The gamma voltage generator generates first and second reference voltages, generates first and second corrected reference voltages by correcting the first and second reference voltages using a target voltage and an external power voltage provided from the display unit in correspondence with the first power voltage, and generates the gamma voltages by dividing the first and second corrected reference voltages. The gamma voltage generator sets the target voltage based on at least one selected from the first reference voltage, the second reference voltage, and a ground voltage.

    Display device
    3.
    发明授权
    Display device 有权

    公开(公告)号：US12165601B2

    公开(公告)日：2024-12-10

    申请号：US18124975

    申请日：2023-03-22

    Applicant: SAMSUNG DISPLAY CO., LTD.

    Inventor： Se Byung Chae

    IPC: G09G3/3291 ,  G09G3/32 ,  G09G3/3233 ,  G09G3/3208

    Abstract: A display device includes: a pixel which emits light at a luminance corresponding to a data voltage applied thereto; and a data driver which supplies the data voltage to the pixel. The data driver includes: a first amplifier which outputs a first reference voltage; a first booster circuit including an input terminal connected to a first input terminal of the first amplifier, and an output terminal connected to a second input terminal of the first amplifier; a second amplifier which outputs a second reference voltage; a resistance string which receives the first and second reference voltages, and generate gamma voltages which are intermediate voltages between the first and second reference voltages; a digital-analog converter which outputs a gamma voltage corresponding to a gray scale of the pixel among the gamma voltages; and a source amplifier which outputs the gamma voltage as the data voltage.

    Gamma voltage generation circuit and display device including the same
    4.
    发明授权
    Gamma voltage generation circuit and display device including the same 有权

    公开(公告)号：US11462146B2

    公开(公告)日：2022-10-04

    申请号：US17519921

    申请日：2021-11-05

    Applicant: SAMSUNG DISPLAY CO., LTD.

    Inventor： Se Byung Chae ,  Su Bin Kim ,  Jin Young Jeon

    IPC: G09G3/20 ,  G09G3/32

    Abstract: A display device includes a display unit including a pixel which displays an image based on a first power voltage and a data signal, a gamma voltage generator which generates gamma voltages, and a data driver which generates the signal using the gamma voltages and provides the data signal to the pixel. The gamma voltage generator generates first and second reference voltages, generates first and second corrected reference voltages by correcting the first and second reference voltages using a target voltage and an external power voltage provided from the display unit in correspondence with the first power voltage, and generates the gamma voltages by dividing the first and second corrected reference voltages. The gamma voltage generator sets the target voltage based on at least one selected from the first reference voltage, the second reference voltage, and a ground voltage.

    Gamma voltage generation circuit and display device including the same
    6.
    发明授权
    Gamma voltage generation circuit and display device including the same 有权

    公开(公告)号：US11763723B2

    公开(公告)日：2023-09-19

    申请号：US17958126

    申请日：2022-09-30

    Applicant: SAMSUNG DISPLAY CO., LTD.

    Inventor： Se Byung Chae ,  Su Bin Kim ,  Jin Young Jeon

    IPC: G09G3/20 ,  G09G3/32

    CPC classification number: G09G3/2007 ,  G09G3/32 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2310/0297 ,  G09G2310/08 ,  G09G2320/0673

    Abstract: A display device includes a display unit including a pixel which displays an image based on a first power voltage and a data signal, a gamma voltage generator which generates gamma voltages, and a data driver which generates the signal using the gamma voltages and provides the data signal to the pixel. The gamma voltage generator generates first and second reference voltages, generates first and second corrected reference voltages by correcting the first and second reference voltages using a target voltage and an external power voltage provided from the display unit in correspondence with the first power voltage, and generates the gamma voltages by dividing the first and second corrected reference voltages. The gamma voltage generator sets the target voltage based on at least one selected from the first reference voltage, the second reference voltage, and a ground voltage.

    Display driving circuit, display device including the same, and method of driving display device
    7.
    发明授权
    Display driving circuit, display device including the same, and method of driving display device 有权

    公开(公告)号：US11587487B2

    公开(公告)日：2023-02-21

    申请号：US17412609

    申请日：2021-08-26

    Applicant: SAMSUNG DISPLAY CO., LTD.

    Inventor： Hyun Chang Kim ,  Se Byung Chae

    IPC: G09G3/20

    Abstract: A display driving circuit includes a clock signal generator which generates a clock signal at a frequency in response to a frequency control signal, a frequency variation determiner which adaptively changes a frequency variation of the clock signal, based on a magnitude of a deviation between the frequency of the clock signal and a target frequency calculated based on a reference clock signal supplied from the outside, and a frequency controller which generates the frequency control signal which updates the frequency of the clock signal, based on the frequency variation, and provides the frequency control signal to the clock signal generator.

    DISPLAY DEVICE
    8.
    发明申请
    DISPLAY DEVICE 有权

    公开(公告)号：US20220358881A1

    公开(公告)日：2022-11-10

    申请号：US17735990

    申请日：2022-05-03

    Applicant: Samsung Display Co., Ltd.

    Inventor： Se Byung Chae ,  Weon Jun Choe

    IPC: G09G3/3233 ,  G09G3/20

    Abstract: A display device includes a display panel, a scan driver, a data compensator, and a data driver. The display panel includes a first area and a second area distinguished from each other along a scan direction. Each of the first and second areas include pixels. The scan driver is configured to sequentially provide scan signals to the display panel along the scan direction. The data compensator is configured to: detect a pattern in which a difference between adjacent grayscale values in image data is greater than a reference value; and generate compensated image data by compensating for grayscale values corresponding to the second area in the image data based on the pattern corresponding to the first area. The data driver is configured to: generate data signals based on the compensated image data; and provide the data signals to the display panel.

    Data driver and driving method thereof
    9.
    发明授权
    Data driver and driving method thereof 有权

    公开(公告)号：US10535301B2

    公开(公告)日：2020-01-14

    申请号：US15835121

    申请日：2017-12-07

    Applicant: Samsung Display Co., Ltd.

    Inventor： Se Byung Chae ,  Weon Jun Choe ,  Jin Young Jeon

    IPC: G09G3/3233

    Abstract: A data driver includes an input unit configured to receive data from outside, a digital-analog converter configured to generate a data signal by using the data, a data comparator configured to compare a reference gray scale value with the data and to generate a first control signal or a second control signal corresponding to a comparison result, and an output unit configured to supply the data signal to data lines, wherein the output unit includes at least one buffer, and a slew rate of the at least one buffer is set to vary depending on whether the first control signal or the second control signal is generated.

    DISPLAY DEVICE
    10.
    发明申请
    DISPLAY DEVICE 审中-公开

    公开(公告)号：US20190340974A1

    公开(公告)日：2019-11-07

    申请号：US16177779

    申请日：2018-11-01

    Applicant: Samsung Display Co., Ltd.

    Inventor： Ji Hyun Ka ,  Tae Hoon Kwon ,  Ki Myeong Eom ,  Chung Yi ,  Se Byung Chae ,  Deok Jun Choi ,  Moon Sang Hwang

    IPC: G09G3/3225 ,  G09G3/3275

    Abstract: A display device includes: a display region including a first pixel region, a second pixel region, and a third pixel region; a dummy region including a first dummy region disposed between the second pixel region and the third pixel region; first, second, and third pixels respectively arranged in the first pixel region, the second pixel region, and the third pixel region in a matrix of vertical lines and horizontal lines; a data converter configured to: receive first image data including effective data corresponding to the display region and dummy data corresponding to the dummy region; and generate second image data by converting a gray scale value of dummy data corresponding to at least one region of the first dummy region in the first image data into a predetermined first gray scale value, the first gray scale value being between a lowest gray scale value and a highest gray scale value.

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