G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 1/32 (2006.01) G06F 3/041 (2006.01) H04W 88/02 (2009.01) G06F 15/02 (2006.01)
Patent
CA 2716168
The present disclosure provides a low power wakeup detection circuit and a portable electronic device having a low power wakeup detection circuit. In accordance with one embodiment, there is provided a portable electronic device, comprising: a housing; a controller received within the housing; a touch- sensitive display having a touch-sensitive overlay, the touch-sensitive display being mechanically constrained by the housing; at least one force sensing transducer located below the touch-sensitive display on an opposite side to the touch- sensitive overlay, the at least one force sensing transducer being connected to the controller and measuring forces applied to the touch-sensitive display; wherein the controller is configured for: initiating a sleep mode from a full power mode in response to a trigger; when in the sleep mode, reading force data measured by the at least one force sensing transducer at a reduced duty cycle relative to the full power mode, comparing the force data to a wakeup force threshold, and returning to the full power mode from the sleep mode when the force data is greater than the wakeup force threshold.
Bernard Christopher David
Holbein Marc Edward
Marchand Rene Pierre
Research In Motion Limited
Ridout & Maybee Llp
LandOfFree
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