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    TOUCH DISPLAY PANEL AND DEVICE
    52.
    发明申请
    TOUCH DISPLAY PANEL AND DEVICE 审中-公开

    公开(公告)号：US20200081573A1

    公开(公告)日：2020-03-12

    申请号：US16566604

    申请日：2019-09-10

    Applicant: LG DISPLAY CO., LTD.

    Inventor： SungChul Kim ,  HoonBae Kim ,  SunYeop Kim ,  Seongkyu Kang

    IPC: G06F3/041 ,  G06F3/044

    Abstract: A touch display panel and a touch display device are discussed. A data voltage, supplied to subpixels corresponding to a touch electrode, has a polarity pattern configured to minimize the cumulative transition value of the data voltage. Noise in touch sensing signals, caused by the transition of the data voltage, can be prevented, and touch sensing performance can be improved. A data voltage having polarities opposite to those of a previous frame is supplied in every specific frames, or some subpixels of a frame are set to have opposite polarities. Deteriorations in subpixels, caused by inversion driving for improving touch sensing performance, can be prevented.

    Touch display device, touch driving circuit and method for driving thereof
    53.
    发明授权
    Touch display device, touch driving circuit and method for driving thereof 有权

    公开(公告)号：US10564758B2

    公开(公告)日：2020-02-18

    申请号：US15803022

    申请日：2017-11-03

    Applicant: LG DISPLAY CO., LTD.

    Inventor： Sungsu Han ,  SungChul Kim

    IPC: G06F3/041 ,  G06F3/044

    Abstract: The present exemplary embodiments relate to a touch display device and a driving method thereof. According to the present exemplary embodiments, when a touch of the user is sensed during a touch sensing period of each frame, the touch force is sensed by being limited to an area determined based on the sensed touch position, thereby efficiently sensing the touch force. In this case, the touch force sensing is repeated for a limited area during the force sensing period of each frame, so that the touch force sensing report rate is improved. Further, the touch force sensing is performed only during the force sensing period of a frame allocated to a limited area so that power consumption according to the touch force sensing is reduced and the precision for sensing a touch force may be maintained.

    Touch screen device and method of driving the same
    57.
    发明授权
    Touch screen device and method of driving the same 有权

    公开(公告)号：US10013123B2

    公开(公告)日：2018-07-03

    申请号：US14942370

    申请日：2015-11-16

    Applicant: LG Display Co., Ltd.

    Inventor： SungChul Kim ,  CheolSe Kim

    IPC: G06F3/044 ,  G06F3/041

    CPC classification number: G06F3/044 ,  G06F3/0412

    Abstract: Disclosed are a touch screen device and a method of driving the same, which minimize an influence of parasitic capacitance of a touch electrode and sense a voltage charged into capacitance(s) of the touch electrode. The touch screen device includes a touch electrode, a touch driving line connected to the touch electrode, a touch driving voltage output unit connected to the touch driving line through a first switch to output a touch driving voltage, a current source connected to the touch driving line through a second switch to discharge electrical charges charged into parasitic capacitance of the touch electrode according to a predetermined discharge current, and a touch voltage sensing unit connected to the touch driving line through a third switch to sense a voltage charged into each of finger capacitance and the parasitic capacitance of the touch electrode.

    Display device with integrated touch screen and method for driving the same
    59.
    发明授权
    Display device with integrated touch screen and method for driving the same 有权

    公开(公告)号：US09910549B2

    公开(公告)日：2018-03-06

    申请号：US14968681

    申请日：2015-12-14

    Applicant: LG Display Co., Ltd.

    Inventor： JungHan Lee ,  HongChul Kim ,  SungChul Kim ,  JeongSeop Lee ,  SeungEun Pyo

    IPC: G06F3/044 ,  G06F3/041

    CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416

    Abstract: Discussed are a display device with an integrated touch screen and a method of operating the same. The display device according to an embodiment includes a display panel including a plurality of pixel electrodes; a touch screen including m number of electrodes which are formed to overlap with the plurality of pixel electrodes, wherein m is a multiple of n, and n is an integer equal to or greater than two, and wherein the m electrodes are divided into n number of electrode groups; a touch driver configured to generate a touch scan signal and to supply the generated touch scan signal to a display driver; and the display driver configured to apply a common voltage or the touch scan signal to one or more of the m electrodes depending on a driving mode of the display device.

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