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Wake-on-touch for vibration sensing touch input devices

  • US 20050078093A1
  • Filed: 10/10/2003
  • Published: 04/14/2005
  • Est. Priority Date: 10/10/2003
  • Status: Active Grant
First Claim
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1. A touch input device, comprising:

  • a substrate configured to support bending wave vibrations;

    a plurality of sensors coupled to the substrate and configured to sense vibrations propagating in the substrate;

    controller electronics coupled to the sensors and configured to calculate touch location using information from sensed vibrations indicative of a touch communicated to the substrate; and

    wake-up circuitry coupled to the sensors and the controller electronics, the wake-up circuitry configured to discriminate between sensed vibrations propagating in the substrate indicative of an intended touch and sensed vibrations propagating in the substrate indicative of an unintended touch, the wake-up circuitry, in response to the sensed vibrations propagating in the substrate indicative of the intended touch, configured to generate a wake-up signal and communicate the wake-up signal to the controller electronics.

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