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    Pixel circuit and display device
    21.
    发明授权
    Pixel circuit and display device 有权

    公开(公告)号：US11270639B2

    公开(公告)日：2022-03-08

    申请号：US17006023

    申请日：2020-08-28

    Applicant: JOLED INC.

    Inventor： Tetsuro Yamamoto

    IPC: G09G3/3233

    Abstract: A pixel circuit configured to emit light based on an image signal includes: a light emitting element (organic EL element); a driver transistor configured to adjust current supplied to the light emitting element; and a write transistor connected between a signal line to which the image signal is applied and the driver transistor. The driver transistor includes: a gate electrode; a counter electrode disposed opposite the gate electrode; and a channel disposed between the gate electrode and the counter electrode. A potential applied to the counter electrode in a write period in which the write transistor conducts current in a state in which the image signal is applied to the signal line reduces a resistance value of the driver transistor to lower value than a potential applied to the counter electrode in an emission period of the light emitting element does.

    Organic EL display panel
    22.
    发明授权
    Organic EL display panel 有权

    公开(公告)号：US10749134B2

    公开(公告)日：2020-08-18

    申请号：US16384424

    申请日：2019-04-15

    Applicant: JOLED INC.

    Inventor： Tetsuro Yamamoto ,  Yasunobu Hiromasu

    IPC: H01L51/52 ,  H01L27/32

    Abstract: The pixels of an organic EL display panel each include an anode electrode layer, an organic layer, and a cathode electrode layer. Each of the organic layer and the cathode electrode layer is shared by the plurality of pixels. An organic EL element in each of the pixels includes an anode section, a cathode section, and a light emitting section. A conductor layer having a recess is provided in a region outside a region of the organic EL element in a view from a light exiting direction in which the organic EL element emits light. The recess includes a coated section that is covered with the organic layer and a conductor exposed section where the conductor layer is exposed. The cathode electrode layer is connected to part of the conductor exposed section.

    Pixel circuit and display unit
    23.
    发明授权
    Pixel circuit and display unit 有权

    公开(公告)号：US10685601B2

    公开(公告)日：2020-06-16

    申请号：US16239875

    申请日：2019-01-04

    Applicant: JOLED Inc.

    Inventor： Tetsuro Yamamoto

    IPC: G09G3/3233 ,  G09G3/3258

    Abstract: A pixel circuit includes a driving transistor, a write transistor, a first switching transistor, a second switching transistor, a first storage capacitor, and a second storage capacitor. The driving transistor controls a current flowing in a light-emitting device. The write transistor controls application of a signal voltage to a gate of the driving transistor. The first switching transistor controls a gate voltage of the driving transistor upon correction operation that allows a gate-source voltage of the driving transistor to come close to a threshold voltage of the driving transistor. The second switching transistor is provided at a path between first and second terminals. The first storage capacitor is provided at a path between the gate of the driving transistor and the first terminal. The second storage capacitor is provided at a path between the gate of the driving transistor and the second terminal.

    PIXEL CIRCUIT AND DISPLAY UNIT
    24.
    发明申请
    PIXEL CIRCUIT AND DISPLAY UNIT 审中-公开

    公开(公告)号：US20190259339A1

    公开(公告)日：2019-08-22

    申请号：US16239819

    申请日：2019-01-04

    Applicant: JOLED Inc.

    Inventor： Tetsuro Yamamoto

    IPC: G09G3/3266 ,  H01L27/32

    Abstract: A pixel circuit includes a driving transistor, a write transistor, a first switching transistor, a first storage capacitor, a second and third switching transistors, and a second storage capacitor. The driving transistor controls a current flowing in a light-emitting device. The write transistor controls application of a signal voltage to a source end of the driving transistor. The first switching transistor controls a gate voltage of the driving transistor during correction operation that allows a gate-source voltage of the driving transistor to come close to a threshold voltage of the driving transistor. The second switching and third switching transistors are provided, in series, at an electrically conductive path between the source end of the driving transistor and a first voltage line.

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