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MULTI-TOUCH PAD CONTROLLER

  • US 20150261372A1
  • Filed: 06/02/2015
  • Published: 09/17/2015
  • Est. Priority Date: 03/14/2012
  • Status: Active Grant
First Claim
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1. A pressure-sensitive switch, comprising:

  • a first conductive trace and a second conductive trace, the first conductive trace being configured for connection to a first voltage reference, the second conductive trace being configured for connection to a second voltage reference, one of the conductive traces being configured for connection to the corresponding voltage reference via a resistance, the switch also comprising a piezoresistive material configured to make contact with the first and second conductive traces, wherein the piezoresistive material forms a voltage divider with the conductive traces and the resistance, the voltage divider being configured to generate a signal responsive to a touch event on a surface associated with the switch; and

    sensor circuitry configured to receive the signal, and to generate control information from the signal, the control information representing a force of the touch event on the surface of the switch, wherein the sensor circuitry is configured to map the control information to a first function responsive to activation of the switch by the touch event, and a second function responsive to changes in the force of the touch event.

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