×

Method and apparatus for active ultrasonic touch devices

  • US 10,386,968 B2
  • Filed: 08/08/2016
  • Issued: 08/20/2019
  • Est. Priority Date: 04/26/2011
  • Status: Active Grant
First Claim
Patent Images

1. A method of determining a user indication, comprising:

  • sending a signal to be used to propagate from a single transmitter, a propagating signal through a propagating medium with a surface;

    receiving a first received signal including the propagating signal that has been disturbed by a disturbance on the surface; and

    using a processor to process the first received signal to at least in part determine a user indication associated with the disturbance,wherein determining the user indication associated with the disturbance includes correlating with a first reference signal at least a first portion of the first received signal including a first binary sequence content to determine a first correlation result, correlating a second portion of the first received signal with a third reference signal to determine a third correlation result, and correlating with a second reference signal at least a portion of a second received signal including a second binary sequence content to determine a second correlation result, and the first reference signal, the second reference signal and the third reference signal are different reference signals.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×