Patent ID: 8970507
Filing Date: 2015-03-03
Classification: G06F

Abstract:
1. A method of conserving power on a portable electronic device, the portable electronic device having a device housing which comprises a touch-sensitive display moveable between a first position and second position relative to the device housing, an accelerometer, and a force sensing transducer located beneath a back side of the touch-sensitive display opposite to a touch-sensitive overlay of the touch-sensitive display, the method comprising: causing the portable electronic device to enter a sleep mode in response to a trigger condition, wherein the touch-sensitive display is deactivated in the sleep mode and the force sensing transducer measures compressive forces applied to the touch-sensitive display at a reduced rate relative to a rate of a full power mode when in the sleep mode; detecting an inertial event using the accelerometer; causing the force sensing transducer to measure compressive forces applied to the touch-sensitive display at the rate of the full power mode in response to detection of the inertial event; using the force sensing transducer at the rate of the full power mode, detecting compressive forces applied to the touch-sensitive display; causing the touch-sensitive display to be reactivated in response to detection of a compressive force which is greater than a predetermined wake force threshold and which is indicative of a screen press; detecting touch events on the touch-sensitive display; and causing the portable electronic device to wake from the sleep mode in response to detection of a touch event within a first predetermined duration of the detection of the compressive force which is greater than the predetermined wake force threshold.