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    Touch sensing system
    11.
    发明授权
    Touch sensing system 有权

    公开(公告)号：US09665221B2

    公开(公告)日：2017-05-30

    申请号：US14482127

    申请日：2014-09-10

    Applicant: LG Display Co., Ltd.

    Inventor： Sungsu Han ,  Seongkyu Kang

    IPC: G06F3/044 ,  G06F3/041

    CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G06F2203/04111

    Abstract: A touch sensing system includes a touch screen including touch sensors and sensing lines, the touch sensors and the sensing lines being divided into first and second sensing areas, a first touch sensing integrated circuit (IC) sensing a touch input of the first sensing area using a signal received through receiving channels, a second touch sensing IC sensing a touch input of the second sensing area using a signal received through receiving channels separated from the receiving channels of the first touch sensing IC, differential amplifiers between the sensing lines and the receiving channels of the first and second touch sensing ICs, and a switch connecting a sensing line, which is closest to the first sensing area among the sensing lines of the second sensing area, to an Nth differential amplifier connected to a last receiving channel of the first touch sensing IC.

    Touch display device, touch driving circuit and touch driving method thereof
    14.
    发明授权
    Touch display device, touch driving circuit and touch driving method thereof 有权

    公开(公告)号：US11740737B2

    公开(公告)日：2023-08-29

    申请号：US17507631

    申请日：2021-10-21

    Applicant: LG Display Co., Ltd.

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

    IPC: G06F3/041 ,  G06F3/044 ,  G09G3/20

    CPC classification number: G06F3/04184 ,  G06F3/0412 ,  G06F3/0448 ,  G06F3/04166 ,  G09G3/20 ,  G09G2310/0291 ,  G09G2310/0297 ,  G09G2310/08

    Abstract: Embodiments of the present disclosure relate to a touch display device, a touch driving circuit and a touch driving method thereof, and more particularly, a touch display device, a touch driving circuit and a touch driving method thereof enabling to reduce the distortion phenomenon of the common voltage caused by a load of the touch electrodes. In addition, embodiments of the present disclosure relate to a touch display device, a touch driving circuit and touch driving method thereof enabling reduction of the distortion phenomenon of the common voltage according to a structure of the touch electrodes. In addition, embodiments of the present disclosure relate to a touch display device, a touch driving circuit and touch driving method thereof enabling to reduce the distortion phenomenon of the common voltage generated in a driving process in which a display driving operation and a touch driving operation are alternated.

    Driving circuit and sensing unit thereof
    19.
    发明授权
    Driving circuit and sensing unit thereof 有权

    公开(公告)号：US10452180B2

    公开(公告)日：2019-10-22

    申请号：US15707714

    申请日：2017-09-18

    Applicant: LG Display Co., Ltd.

    Inventor： SungYub Lee ,  HongChul Kim ,  YoungJoon Lee ,  Seongkyu Kang

    IPC: G06F3/045 ,  G06F3/041 ,  G02F1/1333 ,  G02F1/1343 ,  G06F3/044

    Abstract: Provided is a driving circuit included in a touch display device, which is capable of performing display driving, touch sensing, and additional sensing in addition to the touch sensing. The driving circuit includes a common electrode driving controller, a pixel electrode driving controller, and a sending unit. The common electrode driving controller is configured to apply a common voltage to a common electrode during a display-driving period. The pixel electrode driving controller is configured to apply a data voltage to a pixel electrode during the display-driving period. The sensing unit is connected to the common electrode driving controller during a first sensing period and to the pixel electrode driving controller during a second sensing period. The sensing unit is configured to sense a change in capacitance between the common electrode or pixel electrode and an object that is in contact with the display panel.

    Touch sensing system
    20.
    发明授权
    Touch sensing system 有权
    触摸感应系统

    公开(公告)号：US09465497B2

    公开(公告)日：2016-10-11

    申请号：US14478196

    申请日：2014-09-05

    Applicant: LG Display Co., Ltd.

    Inventor： Sungsu Han ,  Seongkyu Kang

    IPC: G06F3/044 ,  G06F3/041 ,  G06F3/01

    CPC classification number: G06F3/044 ,  G06F3/0418

    Abstract: A touch sensing system includes a plurality of touch sensors, sensing lines connected to the touch sensors, a touch sensing integrated circuit (IC) sensing a touch input using signals received through a plurality of receiving channels, a plurality of differential amplifiers which are formed between the sensing lines and the receiving channels of the touch sensing IC and amplify a difference between touch sensor signals received through adjacent sensing lines, and a multiplexer which connects the adjacent sensing lines to input terminals of each differential amplifier in a forward sensing mode and switches the adjacent sensing lines connected to the input terminals of each differential amplifier in a reverse sensing mode.

    Abstract translation: 触摸感测系统包括多个触摸传感器，连接到触摸传感器的感测线，使用通过多个​​接收通道接收的信号感测触摸输入的触摸感测集成电路（IC）;多个差分放大器， 触摸感测IC的感测线路和接收通道，并且放大通过相邻感测线路接收的触摸传感器信号之间的差异;以及多路复用器，其将相邻感测线路连接到前向感测模式中的每个差分放大器的输入端子，并切换 相邻的感测线以反向感测模式连接到每个差分放大器的输入端。

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