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    SEMICONDUCTOR DEVICE, DRIVER IC, AND ELECTRONIC DEVICE
    124.
    发明申请
    SEMICONDUCTOR DEVICE, DRIVER IC, AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20180211595A1

    公开(公告)日：2018-07-26

    申请号：US15935184

    申请日：2018-03-26

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Kei TAKAHASHI ,  Roh YAMAMOTO

    IPC: G09G3/3233 ,  G06F3/044 ,  G06F3/041

    Abstract: A semiconductor device includes first to fourth terminals, a switch circuit, and an integrating circuit. The integrating circuit includes an amplifier circuit having a (−) terminal, a first (+) terminal, and a second (+) terminal. The integrating circuit is configured to integrate an input signal of the (−) terminal using an average voltage of a voltage of the first (+) terminal and a voltage of the second (+) terminal as a reference voltage. The switch circuit is configured to electrically connect the (−) terminal to the second terminal, the first (+) terminal to the first terminal, the second (+) terminal to the third terminal the (−) terminal to the third terminal, the first (+) terminal to the second terminal, and the second (+) terminal to the fourth terminal. The present semiconductor device is used as a semiconductor device sensing a current flowing through a pixel in a display panel.

    SEMICONDUCTOR DEVICE
    125.
    发明申请
    SEMICONDUCTOR DEVICE 审中-公开

    公开(公告)号：US20180102741A1

    公开(公告)日：2018-04-12

    申请号：US15679203

    申请日：2017-08-17

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Kei TAKAHASHI ,  Yoshifumi TANADA

    IPC: H03F1/02 ,  H03F1/34 ,  G05F1/56 ,  G05F1/46 ,  H03F3/45 ,  H02M3/156

    Abstract: Power consumption of a signal processing circuit is reduced. Further, power consumption of a semiconductor device including the signal processing circuit is reduced. The signal processing circuit includes a reference voltage generation circuit, a voltage divider circuit, an operational amplifier, a bias circuit for supplying bias current to the operational amplifier, and first and second holding circuits. The first holding circuit is connected between the reference voltage generation circuit and the bias circuit. The second holding circuit is connected between the voltage divider circuit and a non-inverting input terminal of the operational amplifier. Reference voltage from the reference voltage generation circuit and reference voltage from the voltage divider circuit can be held in the first and second holding circuits, respectively, so that the reference voltage generation circuit can stop operating. Thus, power consumption of the reference voltage generation circuit can be reduced.

    Display Device and Electronic Device
    126.
    发明申请
    Display Device and Electronic Device 审中-公开

    公开(公告)号：US20180083074A1

    公开(公告)日：2018-03-22

    申请号：US15707485

    申请日：2017-09-18

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Shunpei YAMAZAKI ,  Johan BERGQUIST ,  Daisuke KUBOTA ,  Kei TAKAHASHI

    IPC: H01L27/32 ,  H05K5/00

    CPC classification number: H01L27/3232 ,  G09G2300/023 ,  G09G2300/046 ,  H01L27/3267 ,  H05K5/0017

    Abstract: A display device that has an excellent visibility even under strong light is provided. In the display device, a first display element that reflects visible light and a second display element that emits visible light are between a first substrate and a second substrate. The display device can display an image with high visibility by operating the first display element under strong light and operating the second display element under weak light. Furthermore, a first surface of the second substrate is provided with a touch sensor, and a second surface opposite to the first surface is provided with an anti-reflection layer. Such a structure can sufficiently reduce reflection of external light on the display surface under strong light, further increasing the visibility.

    SEMICONDUCTOR DEVICE, DRIVER IC, AND ELECTRONIC DEVICE
    130.
    发明申请
    SEMICONDUCTOR DEVICE, DRIVER IC, AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20170186371A1

    公开(公告)日：2017-06-29

    申请号：US15387273

    申请日：2016-12-21

    Applicant: Semiconductor Energy Laboratory Co., Ltd.

    Inventor： Kei TAKAHASHI ,  Roh YAMAMOTO

    IPC: G09G3/3233 ,  G06F3/041 ,  G06F3/044

    CPC classification number: G09G3/3233 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04107 ,  G09G2300/0426 ,  G09G2300/0809 ,  G09G2300/0842

    Abstract: A semiconductor device includes first to fourth terminals, a switch circuit, and an integrating circuit. The integrating circuit includes an amplifier circuit having a (−) terminal, a first (+) terminal, and a second (+) terminal. The integrating circuit is configured to integrate an input signal of the (−) terminal using an average voltage of a voltage of the first (+) terminal and a voltage of the second (+) terminal as a reference voltage. The switch circuit is configured to electrically connect the (−) terminal to the second terminal, the first (+) terminal to the first terminal, the second (+) terminal to the third terminal the (−) terminal to the third terminal, the first (+) terminal to the second terminal, and the second (+) terminal to the fourth terminal. The present semiconductor device is used as a semiconductor device sensing a current flowing through a pixel in a display panel.

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