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    Stylus pen and touch sensing system and driving method of the same
    2.
    发明授权
    Stylus pen and touch sensing system and driving method of the same 有权

    公开(公告)号：US10203782B2

    公开(公告)日：2019-02-12

    申请号：US15215769

    申请日：2016-07-21

    Applicant: LG Display Co., Ltd.

    Inventor： Doyoung Jung ,  Hyunguk Jang ,  Sungchul Kim ,  Sanghyuck Bae ,  Sungsu Han ,  Suyun Ju

    IPC: G06F3/045 ,  G06F3/038 ,  G06F3/044 ,  G06F3/0354

    Abstract: A touch sensing system comprises a touchscreen with a plurality of touch electrodes, to which a touchscreen driving signal is applied, and a stylus pen that generates a pen driving signal based on the touchscreen driving signal and sends the same to the touchscreen. The stylus pen comprises: an amplifier that amplifies the touchscreen driving signal to generate an amplified signal; a comparator that compares the amplified signal with a preset reference voltage to generate a comparator output signal; and a signal processor that measures the pulse width of the comparator output signal, adjusts an amount of delay based on a measurement, and determines an output timing of the pen driving signal based on an adjusted amount of delay to synchronize the pen driving signal with the touchscreen driving signal.

    Touch sensing system including active stylus pen
    3.
    发明授权
    Touch sensing system including active stylus pen 有权

    公开(公告)号：US10474280B2

    公开(公告)日：2019-11-12

    申请号：US15381410

    申请日：2016-12-16

    Applicant: LG Display Co., Ltd.

    Inventor： Hyunguk Jang ,  Cheolse Kim ,  Sungchul Kim ,  Sanghyuck Bae ,  Sungsu Han ,  Suyun Ju ,  Doyoung Jung

    IPC: G06F3/041 ,  G06F3/0354 ,  G06F3/038 ,  G06F3/044

    Abstract: A touch sensing system is disclosed. The touch sensing system includes an active stylus pen that generates a first pen driving signal for detecting a touch input in synchronization with a touch driving signal input from a touch screen and a second pen driving signal for detecting an additional input related to an additional function of the active stylus pen in a touch driving period and outputs the first and second pen driving signals to the touch screen; and a touch driving device that applies the touch driving signal to the touch screen, senses the first pen driving signal in a first period of the touch driving period, and senses the second pen driving signal in a second period of the touch driving period.

    Active stylus pen and touch sensing system including the same
    5.
    发明授权
    Active stylus pen and touch sensing system including the same 有权

    公开(公告)号：US10241597B2

    公开(公告)日：2019-03-26

    申请号：US15392783

    申请日：2016-12-28

    Applicant: LG DISPLAY CO., LTD.

    Inventor： Doyoung Jung ,  Cheolse Kim ,  Buyeol Lee ,  Hyunguk Jang ,  Sanghyuck Bae

    IPC: G06F3/01 ,  G06F3/03 ,  G06F3/041 ,  G06F3/044 ,  G06F3/046 ,  G06F3/043 ,  G06F3/048 ,  H01Q1/24 ,  G06F3/038 ,  G06F3/0354

    Abstract: An active stylus pen is insensitive to external noise and has enhanced sensing performance with respect to an uplink signal input from a touch screen. The active stylus pen includes a housing connected to a ground, a conductive tip protruding outwardly from one side of the housing and brought into contact with a touch screen, a conductor layer surrounding an outer surface of the housing with an insulator interposed therebetween, a pen driving circuit connected to the conductor layer, and a switch connecting the conductor layer and the pen driving circuit. The pen driving circuit is cased by the housing, receives an uplink signal and a touch sensor driving signal from the touch screen, generates a pen driving signal synchronized with the touch sensor driving signal and outputs the generated pen driving signal to the touch screen through the conductive tip.

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