Patent ID: 6744698
Filing Date: 2004-06-01
Classification: G04G,G04R,H02J

Abstract:
An electronic device, comprising:a battery; a plurality of load groups including a heavy load group that is comprised of a plurality of heavy load units driven by the battery and a light load group that is comprised of a plurality of light load units and that consumes less power than the heavy load group; a first control unit configured to monitor the output voltage of the battery and to control the supply of power from the battery to the heavy load group, when the output voltage of the battery is at or above a first threshold voltage; and a second control unit configured to monitor the output voltage of the battery and to control the supply of power from the battery to the light load group and to the first control unit, when the output voltage of the battery drops below the first threshold voltage; wherein, when the output voltage of the battery drops below the first threshold voltage, the first control unit (i) stops monitoring the output voltage of the battery, (ii) disables the supply of power from the battery to the heavy load group, the disabled power state of the heavy load group being maintained regardless of any future change in the output voltage of the power supply, and (iii) outputs an activation signal to activate the second control unit.