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    • 10. 发明申请
    • CAPACITIVE TOUCH BUTTON WITH GUARD
    • 电源触控按钮
    • US20150144475A1
    • 2015-05-28
    • US14400073
    • 2012-05-15
    • Ronald Douglas Johnson
    • Ronald Douglas Johnson
    • H03K17/96G01R17/00
    • H03K17/9622G01R17/00H03K2217/94026H03K2217/960705H03K2217/960715H03K2217/960765
    • An apparatus, such as a set-top box, includes at least one capacitive touch button with a guard feature that provides, among other things, the ability to detect and reject false touches. According to an exemplary embodiment, the apparatus includes a first conductive element that is capacitively isolated from ground, and a second conductive element that is capacitively isolated from ground and located adjacent to the first conductive element. A first sensor is coupled to the first conductive element and measures a change in capacitance between the first conductive element and ground due to a change in physical environment. A second sensor is coupled to the second conductive element and measures a change in capacitance between the second conductive element and ground due to the change in physical environment. A controller is coupled to the first sensor and the second sensor and determines a difference between the measured changes in capacitance of the first sensor and the second sensor.
    • 诸如机顶盒的装置包括至少一个具有防护特征的电容式触摸按钮,其特征在于提供了检测和拒绝假触摸的能力。 根据示例性实施例,该装置包括与地电容性隔离的第一导电元件和与地电容性隔离并位于第一导电元件附近的第二导电元件。 第一传感器耦合到第一导电元件并且由于物理环境的改变而测量第一导电元件与地之间的电容变化。 第二传感器耦合到第二导电元件并且由于物理环境的变化而测量第二导电元件与地之间的电容变化。 控制器耦合到第一传感器和第二传感器,并且确定测量的第一传感器和第二传感器的电容变化之间的差异。