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    Liquid crystal display device and driving method thereof
    11.
    发明授权
    Liquid crystal display device and driving method thereof 有权

    公开(公告)号：US08638291B2

    公开(公告)日：2014-01-28

    申请号：US13677963

    申请日：2012-11-15

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Yasunori Yoshida ,  Hajime Kimura

    IPC: G09G3/36

    Abstract: To provide a hold-type display device without a problem of motion blur and a driving method thereof. The length of a period for displaying a blanking image in one frame period is controlled in accordance with a control parameter showing the degree of motion blur, and the level of a signal supplied to a display element is changed in accordance with the length of the period for displaying the blanking image. Accordingly, the hold-type display device without a problem of motion blur and the driving method thereof can be provided.

    Display device and driving method thereof
    12.
    发明授权
    Display device and driving method thereof 有权

    公开(公告)号：US11600236B2

    公开(公告)日：2023-03-07

    申请号：US17673937

    申请日：2022-02-17

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Yasunori Yoshida ,  Hajime Kimura

    IPC: G09G3/34 ,  G09G3/20 ,  G09G3/36 ,  G02F1/01 ,  G09G5/10

    Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2

    Display device
    13.
    发明授权
    Display device 有权

    公开(公告)号：US10319298B2

    公开(公告)日：2019-06-11

    申请号：US15815774

    申请日：2017-11-17

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Shunpei Yamazaki ,  Hajime Kimura ,  Atsushi Umezaki ,  Yasunori Yoshida ,  Hideaki Shishido ,  Takuya Kimishima ,  Yasuyuki Arai

    IPC: G09G3/3233 ,  G09G3/00 ,  G09G3/20 ,  G09G3/3225

    Abstract: In a display element such as an organic EL element, deterioration progresses due to light emission, and emission luminance is lowered even if the same voltage is applied to the display element. Therefore, use over time causes variations in luminance of each pixel, thereby a so-called “image burn-in” phenomenon occurs. Given this factor, the invention provides a display device which can reduce the difference in deterioration of a display element in each pixel and suppress variations in light emission of a display element in a pixel. It is prevented that only a specific pixel has a long accumulated lighting time. For that purpose, a gray scale of a display pattern is changed to prevent the difference in deterioration of display element in pixels from increasing. Alternatively, a specific display pattern is prevented from being fixedly displayed in a specific region. Further alternatively, a pixel lagging behind in deterioration is deteriorated so that the accumulated lighting time of pixels is equal to each other.

    Display device and driving method thereof
    17.
    发明授权
    Display device and driving method thereof 有权

    公开(公告)号：US11341924B2

    公开(公告)日：2022-05-24

    申请号：US16924262

    申请日：2020-07-09

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Yasunori Yoshida ,  Hajime Kimura

    IPC: G02F1/1343 ,  G09G3/34 ,  G09G3/20 ,  G09G3/36 ,  G02F1/01 ,  G09G5/10

    Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2

    Display device and driving method thereof
    18.
    发明授权
    Display device and driving method thereof 有权

    公开(公告)号：US10714024B2

    公开(公告)日：2020-07-14

    申请号：US16012024

    申请日：2018-06-19

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Yasunori Yoshida ,  Hajime Kimura

    IPC: G02F1/01 ,  G09G3/34 ,  G09G3/20 ,  G09G3/36 ,  G09G5/10

    Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½)Lmax2

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