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    FRONT-END SIGNAL COMPENSATION
    11.
    发明申请
    FRONT-END SIGNAL COMPENSATION 审中-公开
    前端信号补偿

    公开(公告)号：US20140028621A1

    公开(公告)日：2014-01-30

    申请号：US14042462

    申请日：2013-09-30

    Applicant: Apple Inc.

    Inventor： Steve Porter HOTELLING ,  Brian Richards Land

    IPC: G06F3/044

    CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06F2203/04104 ,  G06F2203/04107

    Abstract: A touch surface device having improved sensitivity and dynamic range is disclosed. In one embodiment, the touch surface device includes a touch-sensitive panel having at least one sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a compensation circuit, coupled to the at least one sense node, for generating a compensation signal that when summed with the output signal removes an undesired portion of the output signal so as to generated a compensated output signal; and an amplifier having an inverting input coupled to the output of the compensation circuit and a non-inverting input coupled to a known reference voltage.

    Abstract translation: 公开了具有改善的灵敏度和动态范围的触摸表面装置。 在一个实施例中，触摸表面设备包括具有至少一个感测节点的触摸敏感面板，用于在面板上提供指示触摸或无触摸状态的输出信号; 耦合到所述至少一个感测节点的补偿电路，用于产生当与所述输出信号相加时消除所述输出信号的不期望部分以产生经补偿的输出信号的补偿信号; 以及放大器，其具有耦合到所述补偿电路的输出的反相输入和耦合到已知参考电压的非反相输入。

    Touch and hover sensing
    15.
    发明授权
    Touch and hover sensing 有权

    公开(公告)号：US10268303B2

    公开(公告)日：2019-04-23

    申请号：US15083102

    申请日：2016-03-28

    Applicant: Apple Inc.

    Inventor： Jeffrey Traer Bernstein ,  David T. Amm ,  Omar S. Leung ,  Christopher Tenzin Mullens ,  Brian Michael King ,  Brian Richards Land ,  Reese T. Cutler

    IPC: G06F3/041 ,  G06F3/044 ,  G06F3/0486 ,  G06F3/0481 ,  G06F3/0484

    Abstract: Improved capacitive touch and hover sensing with a sensor array is provided. An AC ground shield positioned behind the sensor array and stimulated with signals of the same waveform as the signals driving the sensor array may concentrate the electric field extending from the sensor array and enhance hover sensing capability. The hover position and/or height of an object that is nearby, but not directly above, a touch surface of the sensor array, e.g., in the border area at the end of a touch screen, may be determined using capacitive measurements of sensors near the end of the sensor array by fitting the measurements to a model. Other improvements relate to the joint operation of touch and hover sensing, such as determining when and how to perform touch sensing, hover sensing, both touch and hover sensing, or neither.

    Front-end signal compensation
    16.
    发明授权
    Front-end signal compensation 有权

    公开(公告)号：US09323405B2

    公开(公告)日：2016-04-26

    申请号：US14042462

    申请日：2013-09-30

    Applicant: Apple Inc.

    Inventor： Steve Porter Hotelling ,  Brian Richards Land

    IPC: G09G5/00 ,  G06F3/044

    CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06F2203/04104 ,  G06F2203/04107

    Abstract: A touch surface device having improved sensitivity and dynamic range is disclosed. In one embodiment, the touch surface device includes a touch-sensitive panel having at least one sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a compensation circuit, coupled to the at least one sense node, for generating a compensation signal that when summed with the output signal removes an undesired portion of the output signal so as to generated a compensated output signal; and an amplifier having an inverting input coupled to the output of the compensation circuit and a non-inverting input coupled to a known reference voltage.

    Storing baseline information in EEPROM
    17.
    发明授权
    Storing baseline information in EEPROM 有权
    将基准信息存储在EEPROM中

    公开(公告)号：US08736577B2

    公开(公告)日：2014-05-27

    申请号：US13708675

    申请日：2012-12-07

    Applicant: Apple Inc.

    Inventor： Brian Richards Land ,  Wayne Carl Westerman ,  Steve Porter Hotelling

    IPC: G09G5/00

    CPC classification number: G06F3/044 ,  G06F3/041 ,  G06F3/0418 ,  G06F2203/04104 ,  G06F2203/04108

    Abstract: Pre-stored no-touch or no-hover (no-event) sensor output values can initially be used when a sensor panel subsystem is first booted up to establish an initial baseline of sensor output values unaffected by fingers or other objects touching or hovering over the sensor panel during boot-up. This initial baseline can then be normalized so that each sensor generates the same output value for a given amount of touch or hover, providing a uniform response across the sensor panel and enabling subsequent touch or hover events to be more easily detected. After the initial normalization process is complete, the pre-stored baseline can be discarded in favor of a newly captured no-event baseline that may be more accurate than the pre-stored baseline due to temperature or other variations.

    Abstract translation: 传感器面板子系统首次启动时，最初可以使用预先存储的无触摸或无悬停（无事件）传感器输出值，以建立传感器输出值的初始基线，不受手指或其他触摸或悬停的物体的影响 启动期间的传感器面板。 然后可以对该初始基线进行归一化，使得每个传感器为给定量的触摸或悬停生成相同的输出值，从而在传感器面板上提供均匀的响应，并使得能够更容易地检测到随后的触摸或悬停事件。 在初始归一化过程完成之后，可以丢弃预先存储的基线，以利于新捕获的无事件基线，由于温度或其他变化，可能比预先存储的基线更准确。

    Double-sided touch-sensitive panel with shield and drive combined layer
    19.
    发明授权
    Double-sided touch-sensitive panel with shield and drive combined layer 有权

    公开(公告)号：US11112904B2

    公开(公告)日：2021-09-07

    申请号：US16672187

    申请日：2019-11-01

    Applicant: Apple Inc.

    Inventor： Steven P. Hotelling ,  Brian Richards Land

    IPC: G09G5/00 ,  G06F3/041 ,  G06F3/044 ,  G06F1/16 ,  G06F3/047 ,  G02F1/1333

    Abstract: A multi-touch capacitive touch sensor panel can be created using a substrate with column and row traces formed on either side of the substrate. To shield the column (sense) traces from the effects of capacitive coupling from a modulated Vcom layer in an adjacent liquid crystal display (LCD) or any source of capacitive coupling, the row traces can be widened to shield the column traces, and the row traces can be placed closer to the LCD. In particular, the rows can be widened so that there is spacing of about 30 microns between adjacent row traces. In this manner, the row traces can serve the dual functions of driving the touch sensor panel, and also the function of shielding the more sensitive column (sense) traces from the effects of capacitive coupling.

    Storing baseline information in EEPROM
    20.
    发明授权
    Storing baseline information in EEPROM 有权

    公开(公告)号：US10761658B2

    公开(公告)日：2020-09-01

    申请号：US15070982

    申请日：2016-03-15

    Applicant: Apple Inc.

    Inventor： Brian Richards Land ,  Wayne Carl Westerman ,  Steve Porter Hotelling

    IPC: G09G5/00 ,  G06F3/044 ,  G06F3/041

    Abstract: Pre-stored no-touch or no-hover (no-event) sensor output values can initially be used when a sensor panel subsystem is first booted up to establish an initial baseline of sensor output values unaffected by fingers or other objects touching or hovering over the sensor panel during boot-up. This initial baseline can then be normalized so that each sensor generates the same output value for a given amount of touch or hover, providing a uniform response across the sensor panel and enabling subsequent touch or hover events to be more easily detected. After the initial normalization process is complete, the pre-stored baseline can be discarded in favor of a newly captured no-event baseline that may be more accurate than the pre-stored baseline due to temperature or other variations.

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