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    LEVEL SHIFTER AND DISPLAY DEVICE
    1.
    发明申请
    LEVEL SHIFTER AND DISPLAY DEVICE 有权

    公开(公告)号：US20220208052A1

    公开(公告)日：2022-06-30

    申请号：US17458118

    申请日：2021-08-26

    Applicant: LG Display Co., Ltd.

    Inventor： Hoon Jang ,  SoonDong Cho

    IPC: G09G3/20

    Abstract: Embodiments of the present disclosure relate to a level shifter and a display device capable of differently controlling a signal waveform between a first clock signal and a second clock signal used to output a first gate signal and a second gate signal. Accordingly, it is possible to reduce the variation in output characteristics between the first gate signal and the second gate signal, thereby improving image quality.

    Display device including touch sensor
    2.
    发明授权
    Display device including touch sensor 有权

    公开(公告)号：US10795473B2

    公开(公告)日：2020-10-06

    申请号：US16155632

    申请日：2018-10-09

    Applicant: LG Display Co., Ltd.

    Inventor： Juno Hur ,  Soondong Cho ,  Hoon Jang ,  Dongju Kim

    IPC: G06F3/041 ,  G06F3/044 ,  G09G3/36

    Abstract: Provided is a display device including a level shifter generating an output clock swinging between a first voltage and a third voltage during a display period and swinging between a second voltage and the third voltage during a touch sensing period. Waveform distortion of a no-load alternating current (AC) signal may be prevented without eliminating a stabilizing capacitor of the level shifter, and thus, sensing sensitivity may be increased by reducing noise of a touch sensor signal.

    Touch power circuit having operational amplifier and touch display device using the same
    3.
    发明授权
    Touch power circuit having operational amplifier and touch display device using the same 有权

    公开(公告)号：US10444881B2

    公开(公告)日：2019-10-15

    申请号：US15812702

    申请日：2017-11-14

    Applicant: LG Display Co., Ltd.

    Inventor： Hoon Jang ,  Soon-Dong Cho ,  Juno Hur ,  Dong-Ju Kim ,  Won-Yong Jang

    IPC: G06F3/041 ,  G06F3/044 ,  H03F3/45 ,  G09G3/36

    Abstract: Disclosed are a touch power circuit and a touch display device in which an operational amplifier buffers an input pulse having a first voltage and a higher second voltage alternate, and uses the buffered input pulse to provide an output pulse. The operational amplifier includes a non-inverting input terminal to which the input pulse is supplied, an inverting input terminal connected to the output terminal, and an output unit driven according to a result of amplifying a difference between a voltage of the non-inverting input terminal and a voltage of the inverting input terminal and configured to charge and discharge the output terminal. The circuits and devices may further include an offset voltage applier configured to supply an offset voltage having a first polarity to the non-inverting input terminal and/or the inverting input terminal to level-shift the input pulse.

    Backlight unit
    5.
    发明授权
    Backlight unit 有权
    背光单元

    公开(公告)号：US09119253B2

    公开(公告)日：2015-08-25

    申请号：US14533272

    申请日：2014-11-05

    Applicant: LG Display Co., Ltd.

    Inventor： Hoon Jang

    IPC: H05B37/02 ,  H05B33/08

    CPC classification number: H05B33/0815 ,  H05B33/0812 ,  H05B33/0845 ,  H05B33/086

    Abstract: A backlight unit includes a first switch receiving a constant current applied from an outside circuit and a sensing current, a first comparator receiving an output of the first switch, a second switch receiving an output of the first comparator, a second comparator receiving an output of the second switch; a thin film transistor having a gate electrode receiving an output of the second comparator; a light-emitting diode array connected to a source electrode of the thin film transistor; and a current sensor connected to a drain electrode of the thin film transistor.

    Abstract translation: 背光单元包括接收从外部电路施加的恒定电流和感测电流的第一开关，接收第一开关的输出的第一比较器，接收第一比较器的输出的第二开关，接收第一比较器的输出的第二比较器 第二个开关; 薄膜晶体管，其具有接收所述第二比较器的输出的栅电极; 连接到薄膜晶体管的源电极的发光二极管阵列; 以及连接到薄膜晶体管的漏电极的电流传感器。

    Power supply and display apparatus including the same
    6.
    发明授权
    Power supply and display apparatus including the same 有权

    公开(公告)号：US11551598B2

    公开(公告)日：2023-01-10

    申请号：US17398706

    申请日：2021-08-10

    Applicant: LG Display Co., Ltd.

    Inventor： Won Yong Jang ,  Hoon Jang ,  Soon Dong Cho

    IPC: G09G3/20

    Abstract: The present disclosure may provide a display apparatus including a display panel configured to display an image, a shift register configured to supply a scan signal to the display panel, a level shifter configured to output clock signals for driving the shift register, a power supply configured to supply a gate voltage to the level shifter, and a controller configured to sense a node voltage of a circuit generating the gate voltage, detect a short circuit between the clock signals based on a sensed value and an internal reference value, and control the power supply when the short circuit occurs between the clock signals.

    Power Supply and Display Apparatus Including the Same
    7.
    发明申请
    Power Supply and Display Apparatus Including the Same 有权

    公开(公告)号：US20220068179A1

    公开(公告)日：2022-03-03

    申请号：US17398706

    申请日：2021-08-10

    Applicant: LG Display Co., Ltd.

    Inventor： Won Yong Jang ,  Hoon Jang ,  Soon Dong Cho

    IPC: G09G3/20

    Abstract: The present disclosure may provide a display apparatus including a display panel configured to display an image, a shift register configured to supply a scan signal to the display panel, a level shifter configured to output clock signals for driving the shift register, a power supply configured to supply a gate voltage to the level shifter, and a controller configured to sense a node voltage of a circuit generating the gate voltage, detect a short circuit between the clock signals based on a sensed value and an internal reference value, and control the power supply when the short circuit occurs between the clock signals.

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