Patent ID: 7315097
Filing Date: 2008-01-01
Classification: G05F,H02H

Abstract:
1. A power saving control method for an electronic device including a main load circuit, an over current detection circuit detecting over current that flows into the main load circuit and a switch circuit cutting off load current, supplied from an external power source to the main load circuit, when the over current detection circuit detects the over current, the method comprising: providing a latch circuit supplied with current for operation from the external power source even if the switch circuit is in an OFF state, and switching the switch circuit to the OFF state when the latch circuit is in a latched state and switching the switch circuit to an ON state when the latch circuit is in an unlatched state; operating, when the switch circuit is in the ON state, a user actuable automatic-reset operation switch so that a power off process in the main load circuit is performed to turn the latch circuit into the latched state thereby to switch the switch circuit to the OFF state, switching off a supply of current for operation to the main load circuit and the over current detection circuit, the automatic-reset operation switch being capable of automatically recovering; and operating, when the switch circuit is in the OFF state, the user actuable automatic-reset operation switch so that the latch circuit is turned into the unlatched state, thereby switching the switch circuit to the ON state, switching on the supply of current for operation to the main load circuit and the over current detection circuit.