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Electronic device and control method for electronic device

  • US 6,693,851 B1
  • Filed: 01/11/2001
  • Issued: 02/17/2004
  • Est. Priority Date: 05/14/1999
  • Status: Expired due to Term
First Claim
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1. An electronic device comprising:

  • a chargeable power supply unit for supplying electrical energy;

    a driven unit;

    a mode switching unit for switching, based on a preset condition, an operating mode of said electronic device between a drive mode in which said driven unit is driven and a power-saving mode in which said driven unit is not driven;

    a control circuit operated by the electrical energy supplied from said power supply unit, for generating control signals to control elements in said electronic device;

    a drive unit operated by the electrical energy supplied from said power supply unit, for generating a drive signal in response to a part of said control signals under a condition in which said electronic device is in the drive mode; and

    an operation suspending unit, responsive to the mode switching unit switching the operating mode of the electronic device to a power-saving mode, for suspending operation of said control circuit when the amount of electrical energy stored in said power supply unit becomes smaller than a predetermined electrical energy amount.

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