Electronic equipment provided with battery check device

Patent metadata

Field	Value
Publication number	US-8968952-B2
Application number	US-97233510-A
Country	US
Kind code	B2
Filing date	Dec 17, 2010
Priority date	Oct 31, 2005
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

Immediately after a main switch is turned ON, a battery check is performed based on a first inhibit voltage lower than a second reference voltage which is an inhibit voltage level a predetermined time period after the main switch is turned ON, and therefore, even when the voltage is in a low state immediately after the main switch is turned ON, it is possible to activate a camera without an erroneous detection. Further, when the elapsed time from a time when the main switch is turned OFF to a time when tuned ON next time is relatively long, a solid high polymer film inside the fuel cell is assumed to be further dried, then the first inhibit voltage is changed, and therefore, even when the voltage fluctuates depending on the humidifying state immediately after the main switch is turned ON, an appropriate battery check can be performed.

First claim

What is claimed is:

1. An electronic equipment, comprising:
a fuel cell for supplying an electric power to the electronic equipment;
a power source switch for controlling start and stop of supply of the electric power of the fuel cell to the electronic equipment;
a checking unit, which checks the electric power of the fuel cell; and
a control unit, which controls the check unit,
wherein the control unit measures a first time when the supply of the electric power of the fue…

Assignees

• Nakano Shingo
• Canon Kk

Inventors

• Nakano Shingo

Classifications

• H01M8/04119 Primary

  Electricity · mapped topic

• Y02E60/50

  Cross-Sectional Technologies · mapped topic

• H01M8/04223

  Electricity · mapped topic

• H01M8/04559 Primary

  Electricity · mapped topic

• H01M8/04303

  Electricity · mapped topic