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    CURRENT SOURCE DEVICE FOR ELECTROSTATIC DISCHARGE AND DISPLAY DEVICE INCLUDING THE SAME
    1.
    发明公开
    CURRENT SOURCE DEVICE FOR ELECTROSTATIC DISCHARGE AND DISPLAY DEVICE INCLUDING THE SAME 审中-公开

    公开(公告)号：US20240196498A1

    公开(公告)日：2024-06-13

    申请号：US18532346

    申请日：2023-12-07

    申请人： LX SEMICON CO., LTD.

    发明人： Min Cheol KONG ,  Ji Hwan KIM

    IPC分类号： H05B45/54 ,  H05B47/24 ,  H05K9/00

    CPC分类号： H05B45/54 ,  H05B47/24 ,  H05K9/0067

    摘要： A current source device for electrostatic discharge and a display device including the same are disclosed. The current source device includes a sourcing circuit including a first MOS transistor configured to transmit a current flowing from a pad to a first node in response to a current control voltage, and a second MOS transistor configured to transmit the current flowing from the first node to a ground in response to a bias voltage, and a control circuit including an amplifier configured to generate the current control voltage based on a setting voltage applied from an outside and a voltage of the first node, a first resistor disposed between an output terminal of the amplifier and a gate terminal of the first MOS transistor, and a first switch configured to transmit the bias voltage to a gate terminal of the second MOS transistor in response to a switching control signal.

    LED DRIVING DEVICE AND LED LIGHTING DEVICE INCLUDING THE SAME
    2.
    发明公开
    LED DRIVING DEVICE AND LED LIGHTING DEVICE INCLUDING THE SAME 审中-公开

    公开(公告)号：US20240147592A1

    公开(公告)日：2024-05-02

    申请号：US18499976

    申请日：2023-11-01

    申请人： LX SEMICON CO., LTD.

    发明人： Byung Jun SEO ,  Ji Hwan KIM ,  Young Jin WOO ,  Jong Min LEE ,  Ju Pyo HONG

    IPC分类号： H05B45/44 ,  H05B45/14

    CPC分类号： H05B45/44 ,  H05B45/14

    摘要： The present disclosure relates to a light emitting diode (LED) driving device that may expand a usable range of LED current and battery voltage by reducing heat generation of an integrated circuit, and an LED lighting device including the same, which may include a current controller that constantly controls an LED current flowing through an LED string and an IC heat dissipation part connected to a node between the LED string and the current controller to dissipate IC heat of the current controller, wherein when a battery voltage supplied to the LED string increases, the IC heat dissipation part reduces a first LED current flowing from the LED string to the current controller and simultaneously increases a second LED current flowing from the LED string to the current controller via the IC heat dissipation part, thereby reducing the IC heat generation of the current controller.

    LIGHT-EMITTING DRIVING DEVICE AND A BACKLIGHT APPARATUS
    6.
    发明公开
    LIGHT-EMITTING DRIVING DEVICE AND A BACKLIGHT APPARATUS 审中-公开

    公开(公告)号：US20240260153A1

    公开(公告)日：2024-08-01

    申请号：US18428662

    申请日：2024-01-31

    申请人： LX SEMICON CO., LTD.

    发明人： Sang Suk KIM ,  Jang Su KIM ,  Ji Hwan KIM ,  Jin Ho CHOI

    IPC分类号： H05B45/325 ,  H05B45/10

    CPC分类号： H05B45/325 ,  H05B45/10

    摘要： The light-emitting driving device can include a driving current generation circuit, a sensing circuit, a PWM signal generation circuit, and a controller. The driving current generation circuit can be connected to a channel terminal of a light-emitting string including a plurality of semiconductor light-emitting elements to generate a driving current supplied to the channel terminal. The sensing circuit is connected to the channel terminal to sense a voltage of the channel terminal. The PWM signal generation circuit can generate a PWM signal that controls the supply of driving current. The controller is connected to the sensing circuit to control at least one or more of the intensity of the driving current and the duty ratio of the PWM signal based on the sensed voltage of the channel terminal.

    CURRENT SUPPLY CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME
    9.
    发明申请
    CURRENT SUPPLY CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME 有权

    公开(公告)号：US20230083076A1

    公开(公告)日：2023-03-16

    申请号：US17941887

    申请日：2022-09-09

    申请人： LX Semicon Co., Ltd.

    发明人： Ji Hwan KIM ,  Sang Suk KIM ,  Jang Su KIM

    IPC分类号： G09G3/20

    摘要： The present disclosure provides a current mirror circuit including a first transistor configured to be supplied with a data current from a data driving circuit; a second transistor configured to drive a light emitting diode by mirroring the data current transferred to the first transistor; a capacitor disposed between the first transistor and the second transistor and configured to store a voltage of a gate terminal of the second transistor therein; and a first switch disposed between the first transistor and the second transistor and configured to adjust an input current of the gate terminal of the second transistor.