Patent ID: 7612663

Claim:
A power saving device for a GPS device comprising: a microprocessor; an acceleration of gravity sensor (G-sensor) electrically connected to said microprocessor; a first transistor electrically connecting with said G-sensor; a time delay controller electrically connecting with said first transistor for communicating with said G-sensor and further comprising a second transistor, a capacitor and a resistor; a power controller electrically connected to said time delay controller and said first transistor for communicating with said G-sensor; a GPS receiver electrically connecting with said power controller; and an information record and/or an output device electrically connecting with said time delay controller and said GPS receiver; wherein said microprocessor offers said G-sensor a threshold value via a transmission interface of said microprocessor; said G-sensor creates an acceleration value based on a state of movement thereof, detects if said acceleration value is beyond said threshold value, outputs a starting signal to said power controller via said first transistor when said acceleration value is beyond said threshold value, and stops outputting said starting signal when said acceleration value is below said threshold value such that said power controller is capable of receiving said starting signal and starting said GPS receiver with respect to said state of the movement automatically for controlling said power source and saving a power consumption.