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Method of switching power modes and a portable electronic device configured to perform the same

  • US 8,862,913 B2
  • Filed: 10/02/2009
  • Issued: 10/14/2014
  • Est. Priority Date: 10/02/2009
  • Status: Active Grant
First Claim
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1. A portable electronic device, comprising:

  • a housing;

    a processor received within the housing;

    a display screen connected to the processor and movable from a first position to a second position relative to the housing in response to an externally applied force;

    a base received within the housing;

    biasing elements located between a back of the display screen and the base, the biasing elements urging the display screen away from the second position toward the first position;

    a piezoelectric switch connected to the processor, the piezoelectric switch comprising a piezoelectric element positioned by a back side of the display screen, the piezoelectric element generating an electric charge when the piezoelectric element is deformed by a force applied to the display screen and transferred to the piezoelectric element, the piezoelectric element being directly connected to the processor to output the electric charge directly to the processor; and

    wherein the processor is configured for switching between at least two power modes in response to receipt of the electric charge from the piezoelectric element.

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