Image reading apparatus and imaging apparatus
First Claim
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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Accused Products
Abstract
An image reading apparatus is provided that includes 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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Citations
20 Claims
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1. An image reading apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An imaging apparatus, comprising:
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an image reading apparatus configured to generate read image data;
an image data processing unit configured to convert the read image data generated by the image-reading apparatus into printer image data;
a printer configured to print an image represented by the printer image on a recording medium;
an input unit configured to input a document reading command for the image reading apparatus and a printing command for the printer; and
a control unit configured to control document reading executed by the image reading apparatus and printing executed by the printer in response to the document reading command and the printing command;
wherein the image reading apparatus includes 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 the read 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. - View Dependent Claims (17, 18, 19, 20)
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Specification