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Image reading apparatus and imaging apparatus

  • US 20060193013A1
  • Filed: 02/22/2006
  • Published: 08/31/2006
  • Est. Priority Date: 02/28/2005
  • Status: Active Grant
First Claim
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1. An image reading apparatus comprising:

  • an image sensor configured to convert image light of a document into an image signal;

    an optical unit configured to project the image light of the document on the image sensor;

    a drive unit configured to drive the optical unit in a sub scanning direction;

    a document size detecting unit configured to detect a size of the document using the image signal;

    an image signal processing unit configured to digitally convert the image signal of the image sensor into image data;

    a power circuit configured to output an operating voltage in standby mode and stop the outputting of the operating voltage in sleep mode; and

    a power saving control unit configured to position the optical unit to a document size detecting position before switching the power circuit from the standby mode to the sleep mode.

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