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US 6,587,658 B2Granted
Image reading apparatus
AssigneeCanon Denshi Kabushiki Kaisha
InventorsKatsuhiko Okitsu, Hiroshi Komuro
Life of this patent
Estimating the term…
Abstract
This invention has as its object to provide a highly reliable image reading apparatus in which both an image reading unit and photographing unit can obtain optimal images. To achieve this object, the apparatus has a light-emitting element array which illuminates a document to be read by a read sensor, and an illumination lamp which illuminates the document to be recorded by the photographing unit.
Claims9
An image reading apparatus comprising:
- a document convey unit which conveys a document;
- an image reading unit which reads an image on the document conveyed by said document convey unit;
- a resolution selection unit which selects an image read resolution of said image reading unit;
- a photographing unit which has an exposure adjustment unit which adjusts an exposure value by controlling a degree of opening of a slit, and photographs an image on the document conveyed by said document convey unit;
- and
- a control unit which controls operations of said document convey unit and said exposure adjustment unit on the basis of the resolution selected by said resolution selection unit so as to adjust a convey speed of the document and the exposure value.
3 more elements
Dependencies are inferred from the claim text.