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Paper feeding scanner with document edge detecting function

A scanning device and paper-feeding technology, applied in electrical components, computer components, character and pattern recognition, etc., can solve problems affecting the speed of documents, loss of smooth surface, and correction of skew detection affecting the leading edge of documents, etc., to achieve The scanning process is smooth and the effect of reducing wear and tear

Active Publication Date: 2007-02-28
AVISION PRECISION IND (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Under long-term use, this background component 101 will be subject to a considerable degree of wear and lose its smooth surface, thereby scratching the documents that are fed later, or affecting the speed of documents passing through the scanning area due to increased friction with the documents. which in turn affects the scan quality
In addition, the background component 101 may also absorb quite a lot of paper scraps due to static electricity. When the paper scraps are white, the background component 101 will not be able to provide a black background and lose its function, thereby affecting the detection of the leading edge of the document and the detection of skew. Correction

Method used

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  • Paper feeding scanner with document edge detecting function
  • Paper feeding scanner with document edge detecting function
  • Paper feeding scanner with document edge detecting function

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Embodiment Construction

[0021] FIG. 2 is a schematic diagram of a sheet-fed scanning device with a document edge detection function according to a first embodiment of the present invention. 3 and 4 are partial schematic diagrams showing the first and second states of the sheet-fed scanning device of FIG. 2 , respectively. As shown in FIGS. 2 to 4 , a paper-fed scanning device 10 with document edge detection function of the present invention includes a scanning module 20 , an automatic document feeder 30 and a housing 40 . The sheet-fed scanning device 10 may also have a flat-bed scanning function in addition to the sheet-fed scanning function. The scanning module 20 has a light source 22 , a mirror set 23 , an image sensor 24 and a lens set 25 . The light source 22 emits a light 21 to scan a document P. As shown in FIG. Mirror set 23 may include one or more mirrors. The automatic document feeder 30 is used to feed documents P through a scanning area 32 on a paper feeding path 31 for scanning by th...

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Abstract

The present invention relates to a paper-feeding type scanning device with file edge detection function. Said device includes a scanning module and an automatic paper-feeding device. Said scanning module can be used for giving out a light ray to scan a file, and the automatic paper-feeding device can be used for feeding a file and making said file be passed through a scanning zone on the paper-feeding channel and be scanned by scanning module. Said invention also provides the concrete structure of the above-mentioned paper-feeding channel.

Description

technical field [0001] The present invention relates to a paper-fed scanning device with a document edge detection function, in particular to a paper-fed scanning device that uses a dark background that does not need to be in contact with the document to assist in detecting the edge of the document. Background technique [0002] In a sheet-fed scanner, traditional document edge detection includes document leading edge detection, which is used to let the scanner know when to output the image signal of the selected document. A method for detecting the leading edge of a document can be achieved by using the paper sensor in conjunction with the design parameters of the paper feeding structure, but this will produce a considerable degree of mechanical error. Another way to detect the leading edge of a document is to use a dark background behind the document. In this detection method, the edge of the document is assumed to be white, so the dark background...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/04G06K9/20
Inventor 盛少澜
Owner AVISION PRECISION IND (SUZHOU) CO LTD