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Dual-sided track pad

  • US 8,471,822 B2
  • Filed: 09/06/2006
  • Issued: 06/25/2013
  • Est. Priority Date: 09/06/2006
  • Status: Active Grant
First Claim
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1. A track pad device, comprising:

  • a capacitive array element, the capacitive array element having a first surface and an opposing second surface;

    wherein the capacitive array element further comprises;

    a plurality of first sensing lines for transmitting a first signal indicative of a change in capacitance when an object comes into close proximity to, or touches the first surface,a plurality of second sensing lines for transmitting a second signal indicative of a change in capacitance when an object come into close proximity to, or touches the second surface, anda plurality of driving lines formed between the first and second sensing lines on a single layer and configured for interacting with the plurality of first and second sensing lines to form capacitive sensing nodes for both the first and second surfaces.

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