Patent ID: 8175662

Claim:
A power management system for an electronic device, comprising: a microprocessor controlling said electronic device; an accelerometer; and a power application operating on said microprocessor to place said electronic device in one of a plurality of power consumption modes by monitoring signals from said accelerometer and changing modes within said plurality of power consumption modes based on said signals, said power application providing instructions to said microprocessor to place said electronic device in a higher power state than a low power state when said electronic device is in a stationary state at a resting location and said accelerometer provides a first signal indicating a subsequent movement of said electronic device from said resting location to a first location in a spaced relationship from said resting location and then activate a backlight for said electronic device when placed in said higher power state; and place said electronic device in said low power state from said higher power state upon receipt of a signal indicating return of said electronic device from said first location to around said resting location, said signal being derived from data from said accelerometer, and then deactivate said backlight, wherein said low power state is a partially-off state; and said backlight has a variable intensity set by said power application.