Patent ID: 8041974
Filing Date: 2011-10-18
Classification: G06F

Abstract:
1. A power management method for an input device, comprising: starting to count time and recording a trigger time of the input device after the input device enters a light-sleep mode, wherein the input device enters the light-sleep mode when the input device is idle over a fixed time; updating a deep-sleep start time according to the trigger time; and entering a deep-sleep mode when the input device is idle over the deep-sleep start time, wherein the step of recording the trigger time further comprises: activating a timer to obtain the trigger time after entering the light-sleep mode; setting a detection period between the fixed time and an upper limit value, and dividing the detection period into a plurality of time intervals respectively corresponding to a plurality of index values; and recording one of the index values according to one of the time intervals that corresponds to the trigger time.