Invention Grant
US08355009B2 Method and apparatus for determining coordinates of simultaneous touches on a touch sensor pad 有权
用于确定触摸传感器垫上的同时触摸的坐标的方法和装置

  • Patent Title: Method and apparatus for determining coordinates of simultaneous touches on a touch sensor pad
  • Patent Title (中): 用于确定触摸传感器垫上的同时触摸的坐标的方法和装置
  • Application No.: US12107244
    Application Date: 2008-04-22
  • Publication No.: US08355009B2
    Publication Date: 2013-01-15
  • Inventor: William J McDermid
  • Applicant: William J McDermid
  • Main IPC: G06F3/045
  • IPC: G06F3/045
Method and apparatus for determining coordinates of simultaneous touches on a touch sensor pad
Abstract:
Apparatuses and methods are provided for determining coordinates of simultaneous touches on a touch sensor pad. A touch sensor pad includes a first plurality of resistive sensor strips on a first resistive sheet and a second plurality of resistive sensor strips on a second resistive sheet. A user touches the touch sensor pad at multiple locations simultaneously. A controller of the touch sensor pad determines coordinates of each of the multiple locations of touch independently of other touches. To determine coordinates for a touch, the controller identifies a first strip of the first plurality of resistive sensor strips of the first resistive sheet making contact with a second strip of the second plurality of resistive sensor strips of the second resistive sheet in response to the touch. The controller measures voltages of the strips to determine coordinates of the touch and measures resistance shifts in the strips due to touches to determine contact area of the touch which correlates to the types of objects causing the touch and the pressure of the touch.
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