Document reader

A technology for document reading and reading surface, applied in the direction of image communication, electrical components, user/computer interaction input/output, etc., which can solve the problem of small document reading area
CN101764907AActive Publication Date: 2010-06-30SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SEIKO EPSON CORP
Publication Date
2010-06-30

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Patent Text Reader

Abstract

The object of the invention is to perform white reference process under the precondition of not reducing the reading region of the document. A mouse type scanner includes first-fourth position detection sensors, a document reading opening, a cover and a pad on the bottom face (namely the document reading surface). The document reading opening is a rectangular opening of the mouse type scanner for reading the document, and is covered by a light-transmittable cover. A white reference region is formed in the central part (centre point) of the cover, and the white reference region provides a white reference used in the white reference setting process performed in the scanner.
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Description

technical field

[0001] The present invention relates to a document reading device for reading characters and images on a document. Background technique

[0002] Stationary scanners are widely used as document reading devices (also referred to as image reading devices). In a stationary scanner, scanning of a document is realized by moving either a document reading unit disposed inside the device or the document. On the other hand, there is also known a handheld scanner that reads a document by moving (scanning) a document reading device main body. In a scanner, generally, in order to perform appropriate reading, it is necessary to perform setting processing of a white reference and a black reference (for example, refer to Patent Document 1). In a stationary scanner in which the document reading unit moves, a white reference plate used as a reference in the white reference setting process is arranged outside the frame of the document table. In contrast, in a hand-held scann...

Claims

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