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    Touch screen with palm rejection in the presence of charger noise
    1.
    发明授权
    Touch screen with palm rejection in the presence of charger noise 有权

    公开(公告)号：US09710104B2

    公开(公告)日：2017-07-18

    申请号：US14245915

    申请日：2014-04-04

    Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

    Inventor： CheeWeng Cheong ,  Leonard Dinu ,  Dianbo Guo ,  Kien Beng Tan

    IPC: G06F3/041

    CPC classification number: G06F3/0418

    Abstract: A touch screen device having a touch screen panel and a method for operating a touch screen device are provided. The method includes monitoring, during a noise monitoring phase, channel signals of a first set of channels and a second set of channel of the touch screen panel, detecting a stylus signal in response to a channel signal greater than a stylus threshold and less than a palm threshold, selecting the first set of channels when the stylus signal is detected on at least one channel of the first set of channels and is not detected on the second set of channels, and selecting the second set of channels when the stylus signal is detected on at least one channel of the second set of channels and is not detected on the first set of channels.

    COMPACT TOUCH SCREEN CONTROLLER
    2.
    发明申请
    COMPACT TOUCH SCREEN CONTROLLER 审中-公开
    紧凑触摸屏控制器

    公开(公告)号：US20160364058A1

    公开(公告)日：2016-12-15

    申请号：US14736317

    申请日：2015-06-11

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Leonard Dinu

    IPC: G06F3/041 ,  G06F3/044

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

    Abstract: A touch screen controller is for a drive line emitting a periodic signal and capacitively intersecting sense lines. A selection circuit, for each of a number of portions of the periodic signal equal to a number of the sense lines, couples a first subset of the sense lines to a first output path, and couples a second subset of the sense lines to a second output path, the second subset being sense lines not included in the first subset. Processing circuitry, for each portion of the periodic signal, measures a capacitance of the first output path, measures a capacitance of the second output path, and sums the capacitance of the first output path and the capacitance of the second output path. The processing circuitry determines a capacitance between each sense line of the first and second subsets and the drive line as a function of the sums.

    Abstract translation: 触摸屏控制器用于发射周期信号和电容相交感测线的驱动线。 选择电路，对于等于感测线的数量的周期性信号的多个部分中的每一个，将感测线的第一子集耦合到第一输出路径，并将感测线的第二子集耦合到第二 输出路径，第二子集是不包括在第一子集中的感测线。 对于周期信号的每个部分，处理电路测量第一输出路径的电容，测量第二输出路径的电容，并且将第一输出路径的电容与第二输出路径的电容相加。 处理电路确定第一和第二子集的每个感测线与驱动线之间的电容作为和的函数。

    TOUCH REJECTION FOR COMMUNICATION BETWEEN A TOUCH SCREEN DEVICE AND AN ACTIVE STYLUS
    4.
    发明申请
    TOUCH REJECTION FOR COMMUNICATION BETWEEN A TOUCH SCREEN DEVICE AND AN ACTIVE STYLUS 有权
    触控屏幕设备与主动式笔记本之间的通信触发阻止

    公开(公告)号：US20160266673A1

    公开(公告)日：2016-09-15

    申请号：US14641717

    申请日：2015-03-09

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Leonard Dinu ,  Eng Jye Ng ,  Kien Beng Tan

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

    CPC classification number: G06F3/044 ,  G06F3/0416

    Abstract: A touch panel includes capacitive sensing electrodes and a touch controller operates in a first operating mode to detect a touch location on the touch panel. In a second operating mode, the touch controller transmits a modulated data signal through the touch panel to an active stylus. Each electrode is driven by a line driver circuit. A control circuit selectively actuates first ones of the line driver circuits to pass the modulated data signal to corresponding first ones of the electrodes which do not pass through a region of the touch panel associated with the location of the detected touch. Simultaneously, the control circuit selectively actuates second ones of the line driver circuits, different from said first ones of the line driver circuits, to ground corresponding second ones of the electrodes which do pass through the region of the touch panel associated with the location of the detected touch.

    Abstract translation: 触摸面板包括电容感测电极，并且触摸控制器在第一操作模式下操作以检测触摸面板上的触摸位置。 在第二操作模式中，触摸控制器通过触摸面板将经调制的数据信号发送到活动触针。 每个电极由线路驱动电路驱动。 控制电路选择性地致动线路驱动电路中的第一线路，以将经调制的数据信号传递到不通过与检测到的触摸的位置相关联的触摸面板的区域的对应的第一电极。 同时，控制电路选择性地将不同于所述第一线路驱动器电路的线路驱动器电路中的第二线路驱动到接地的相应的第二电极，所述对应的第二电极通过与触摸面板的位置相关联的触摸面板的区域 检测到触摸。

    SYSTEM AND METHOD OF COMMUNICATION BETWEEN A CAPACITIVE TOUCH SCREEN AND AN ACTIVE STYLUS
    5.
    发明申请
    SYSTEM AND METHOD OF COMMUNICATION BETWEEN A CAPACITIVE TOUCH SCREEN AND AN ACTIVE STYLUS 有权
    电容触摸屏和活动板之间的通信系统和方法

    公开(公告)号：US20160048234A1

    公开(公告)日：2016-02-18

    申请号：US14461977

    申请日：2014-08-18

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Praveesh Chandran ,  Baranidharan Karuppusamy ,  Giuseppe Noviello ,  Chee Weng Cheong ,  Leonard Dinu ,  Dianbo Guo ,  Kien Beng Tan ,  Chaochao Zhang

    IPC: G06F3/044 ,  G06F3/0354

    CPC classification number: G06F3/044 ,  G06F3/03545 ,  G06F3/0383 ,  G06F3/0416

    Abstract: An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.

    Abstract translation: 有源触笔电容耦合到用于通信的电容式触摸面板。 活动的笔在等待模式下操作以从面板接收初始通信。 响应于这样的接收，活动触针与实现时分复用的重复通信帧同步。 从活动手写笔到面板的通信包括：信息通信; 专用于面板的列和/或行的同步通信和通信。 从面板到活动手写笔的通信可以唯一地被寻址到手写笔，或者通常被发送到一组触控笔。

    Touch rejection for communication between a touch screen device and an active stylus
    8.
    发明授权
    Touch rejection for communication between a touch screen device and an active stylus 有权

    公开(公告)号：US09696861B2

    公开(公告)日：2017-07-04

    申请号：US14641717

    申请日：2015-03-09

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Leonard Dinu ,  Eng Jye Ng ,  Kien Beng Tan

    IPC: G06F3/044 ,  G06F3/041

    CPC classification number: G06F3/044 ,  G06F3/0416

    Abstract: A touch panel includes capacitive sensing electrodes and a touch controller operates in a first operating mode to detect a touch location on the touch panel. In a second operating mode, the touch controller transmits a modulated data signal through the touch panel to an active stylus. Each electrode is driven by a line driver circuit. A control circuit selectively actuates first ones of the line driver circuits to pass the modulated data signal to corresponding first ones of the electrodes which do not pass through a region of the touch panel associated with the location of the detected touch. Simultaneously, the control circuit selectively actuates second ones of the line driver circuits, different from said first ones of the line driver circuits, to ground corresponding second ones of the electrodes which do pass through the region of the touch panel associated with the location of the detected touch.

    Compact touch screen controller having multiplexed sense lines
    9.
    发明授权
    Compact touch screen controller having multiplexed sense lines 有权

    公开(公告)号：US10152161B2

    公开(公告)日：2018-12-11

    申请号：US14736317

    申请日：2015-06-11

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Leonard Dinu

    IPC: G06F3/041 ,  G06F3/044

    Abstract: A touch screen controller is for a drive line emitting a periodic signal and capacitively intersecting sense lines. A selection circuit, for each of a number of portions of the periodic signal equal to a number of the sense lines, couples a first subset of the sense lines to a first output path, and couples a second subset of the sense lines to a second output path, the second subset being sense lines not included in the first subset. Processing circuitry, for each portion of the periodic signal, measures a capacitance of the first output path, measures a capacitance of the second output path, and sums the capacitance of the first output path and the capacitance of the second output path. The processing circuitry determines a capacitance between each sense line of the first and second subsets and the drive line as a function of the sums.

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