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Camera and camera system

  • US 6,753,921 B1
  • Filed: 12/09/1999
  • Issued: 06/22/2004
  • Est. Priority Date: 12/14/1998
  • Status: Expired due to Fees
First Claim
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1. A camera capable of being operatively connected to an external device for communicating with the external device and executing various processings corresponding to the communication, said camera comprising:

  • a plurality of electric circuits for executing a predetermined camera operation;

    a power supply in said camera;

    a connection terminal or connecting the camera to the external device, the connection terminal comprising a communication terminal communicating with the external device and a power terminal receiving power supplied from a power supply of the external device;

    a control circuit comprising a memory which stores required current values for the plurality of electric circuits; and

    a power supply control circuit for selecting any one of said power supply in said camera and said external device power supply connected via said connection terminal as a power supply for said plurality of electric circuits, the power supply control circuit discriminating a sum of the required current values for executing the various processings from information stored in the control circuit memory and selecting any one of said power supply in said camera and said external device power supply in accordance with the discrimination result when the power supply control circuit executes the processings corresponding to the communication with the external device.

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