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    • 3. 发明授权
    • Negative pixel compensation
    • 负像素补偿
    • US08482544B2
    • 2013-07-09
    • US12500870
    • 2009-07-10
    • Brian Richards LandMarduke YousefporSteven Porter Hotelling
    • Brian Richards LandMarduke YousefporSteven Porter Hotelling
    • H03K17/96
    • G06F3/044G06F3/0418G06F2203/04104
    • Negative pixel compensation in a touch sensitive device is disclosed. The device can compensate for a negative pixel effect in touch signal outputs due to poor grounding of an object touching the device. To do so, the device can switch to a configuration to measure the grounding condition of the touching object and use the measurement to compensate the touch output values from the device accordingly. In the switched configuration, a first set of lines of the device can be switched between a coupling to a stimulation signal input to drive the device, a coupling to a capacitance signal output to output a signal indicative of the object's grounding condition, and a coupling to ground. A second set of lines of the device can be coupled to a touch signal output to output a signal indicative of the object's touch at the device. In addition or alternatively, in the switched configuration, the first set of lines of the device can be switched to function as the second set of lines and vice versa. The grounding signal can be applied to the touch signal to compensate for the negative pixel effect.
    • 公开了触敏装置中的负像素补偿。 由于接触设备的物体接地不良,该装置可以补偿触摸信号输出中的负像素效应。 为此,设备可以切换到配置以测量触摸对象的接地状态,并使用测量值相应地补偿设备的触摸输出值。 在切换配置中,设备的第一组线路可以在耦合到输入的刺激信号以驱动设备之间切换,耦合到电容信号输出以输出指示对象的接地状态的信号,以及耦合 到地面 设备的第二组线可以耦合到触摸信号输出以输出指示对象在设备处的触摸的信号。 另外或替代地,在切换配置中,设备的第一组线路可以被切换以用作第二组线路,反之亦然。 接地信号可以应用于触摸信号来补偿负像素效应。
    • 5. 发明申请
    • FULL SCALE CALIBRATION MEASUREMENT FOR MULTI-TOUCH SURFACES
    • 用于多触摸表面的全尺寸校准测量
    • US20120154339A1
    • 2012-06-21
    • US13405218
    • 2012-02-24
    • Brian Richards LandSteve Porter HotellingRichard Wei Kwang Lim
    • Brian Richards LandSteve Porter HotellingRichard Wei Kwang Lim
    • G06F3/041
    • G06F3/0418
    • Normalization of regions of a sensor panel capable of detecting multi-touch events, or a sensor panel capable of detecting multi-hover events, is disclosed to enable each sensor in the sensor panel to trigger a virtual button in a similar manner, given the same amount of touch or hover. Each sensor produces an output value proportional to the level or amount of touch or hover. However, due to processing, manufacturing and physical design differences, the sensor output values can vary from region to region or panel to panel for a given amount of touch or hover. To normalize the sensor output values across regions, gain and offset information can be obtained in advance, stored in nonvolatile memory, and later used to normalize the sensor output values so that all regions in the sensor panel can trigger virtual buttons similarly, providing a uniform “response function” at any location on the sensor panel.
    • 公开了能够检测多触摸事件的传感器面板的区域的归一化,或者能够检测多悬停事件的传感器面板,以使得传感器面板中的每个传感器能够以类似的方式触发虚拟按钮,给定相同的方式 触摸量或悬停量。 每个传感器产生与触摸或悬停的水平或数量成比例的输出值。 然而,由于处理,制造和物理设计差异,传感器输出值可以在给定量的触摸或悬停之间因地区或面板到面板而变化。 为了在区域之间规范化传感器输出值,可以提前获得增益和偏移信息,存储在非易失性存储器中,然后用于归一化传感器输出值,以便传感器面板中的所有区域可以类似地触发虚拟按钮,从而提供均匀 传感器面板上任何位置的“响应功能”。
    • 9. 发明授权
    • Front-end signal compensation
    • 前端信号补偿
    • US08553004B2
    • 2013-10-08
    • US13284732
    • 2011-10-28
    • Steve Porter HotellingBrian Richards Land
    • Steve Porter HotellingBrian Richards Land
    • G09G5/00
    • G06F3/0418G06F3/044G06F2203/04104G06F2203/04107
    • 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.
    • 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。