Patent ID: 8862913

Claim:
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.