CN1302657C - Paper feeding scanner with document edge detecting function - Google Patents
Paper feeding scanner with document edge detecting function Download PDFInfo
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- CN1302657C CN1302657C CNB2004100160952A CN200410016095A CN1302657C CN 1302657 C CN1302657 C CN 1302657C CN B2004100160952 A CNB2004100160952 A CN B2004100160952A CN 200410016095 A CN200410016095 A CN 200410016095A CN 1302657 C CN1302657 C CN 1302657C
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- depressed part
- scan module
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Abstract
The present invention relates to a paper advance scanning device with the function of detecting the edge of a file, which comprises a scanning module and an automatic paper advancing device, wherein the scanning module is used for emitting a light ray to scan a file; the automatic paper advancing device is used for feeding the file to pass through a scanning area on a paper advance passage so that the file is scanned by the scanning module. In the present invention, a concave part is formed on the paper advancing passage corresponding to the scanning area; the file which passes through the scanning area is positioned between the concave part and the scanning module; the first brightness which is obtained when the scanning module senses the concave part is far lower than the second brightness which is obtained when the scanning module senses the file so that the detection of an edge of the file and the correction of the degree of skewness are assisted.
Description
Technical field
The invention relates to a kind of paper feedback scanning device with document edge detecting function, especially the dark-background that does not need to contact with file about a kind of utilization assists to detect the paper feedback scanning device of document edge.
Background technology
In paper feeding scanner, traditional document edge detecting include file leading edge detecting is used for allowing scanner know that the signal of video signal that when begins selected file is exported.A kind of document leading edge detecting mode is can utilize paper sensor to cooperate the design parameter of paper feed structure and reach, yet can produce the machine error of certain degree like this.Another kind of document leading edge detecting mode is to utilize to be positioned at the dark-background of rear paper and to reach.In this detecting mode, the edge of file is assumed to be white, therefore can utilize dark-background to be used as contrasting benchmark, by the method for image processing, can reach the detecting of document leading edge.
After detecting document leading edge, whether the document leading edge that can utilize the mode of image processing to judge both sides arrives scanning area simultaneously, to assist to finish the skew corrected of file.
Fig. 1 shows a kind of schematic diagram with paper feeding scanner of document leading edge detecting function.As shown in Figure 1, file 102 is positioned at scan module 104 scannings of scanning window 105 belows by scanning window 105 tops.Background assembly 101 is to be positioned at file 102 tops, and contacts with file 102, comes the detecting of secondary file leading edge 103 and follow-up skew corrected by black background is provided.
Under long-term the use, this background assembly 101 can be subjected to the wearing and tearing of certain degree and lose its smooth surface, and then the file presented afterwards of scratch, or because and the frictional force between the file increase and influence the speed of file by scanning area, and then influence scanning quality.In addition, also may be on the background assembly 101 adsorb considerable paper scrap, when paper scrap when being white, will make background assembly 101 provide black background and lose its function, and then influence the detecting of document leading edge and crooked correction because of static.
Therefore, how providing a kind of paper feedback scanning device with document edge detecting function that can be suitable for and can not produce wear problem for a long time, is exactly problem to be solved by this invention.
Summary of the invention
The dark-background that an object of the present invention is to provide a kind of utilization does not need to contact with file assists to detect the paper feedback scanning device of document edge, with the mistake of stopping to be caused because of abrasion.
For reaching above-mentioned purpose, the invention provides a kind of paper feedback scanning device and comprise an one scan module and an automatic paper conveying apparatus with document edge detecting function.Scan module is used for sending a light and scans a file.The feed documents that is used for automatic paper conveying apparatus scans for scan module by the one scan district on the paper-feeding channel.In the present invention, on paper-feeding channel, be formed with a depressed part corresponding to scanning area, and be between depressed part and scan module by the file of scanning area, so that resulting one second brightness when resulting one first brightness is different from scan module sensing file during scan module sensing depressed part assists to detect the edge of this document and the correction of skewness.
The above-mentioned structure of the application of the invention does not need the background assembly just can carry out the detecting of leading edge, lateral margin and the trailing edge of file, or even the image processing after sweeping in advance, and for example frame selects sweep limits etc. automatically.Owing to provide the structure of dark-background not need contact with file in the present invention, suffered wearing and tearing in the time of therefore can reducing file and pass through scanning area make scanning process more smooth and easy.
Description of drawings
Fig. 1 shows a kind of schematic diagram of known file leading edge arrangement for detecting.
Fig. 2 shows the schematic diagram according to the paper feedback scanning device with document edge detecting function of first embodiment of the invention.
The partial schematic diagram of first state of the paper feedback scanning device of Fig. 3 displayed map 2.
The partial schematic diagram of second state of the paper feedback scanning device of Fig. 4 displayed map 2.
One embodiment of the depressed part of the paper feedback scanning device of Fig. 5 displayed map 2.
Another embodiment of the depressed part of the paper feedback scanning device of Fig. 6 displayed map 2.
Fig. 7 shows the partial schematic diagram according to second state of the paper feedback scanning device of second embodiment of the invention.
Fig. 8 shows the partial schematic diagram according to first state of the paper feedback scanning device of third embodiment of the invention.
Fig. 9 shows the partial schematic diagram according to first state of the paper feedback scanning device of fourth embodiment of the invention.
Figure 10 shows the partial schematic diagram according to first state of the paper feedback scanning device of fifth embodiment of the invention.
Figure 11 shows the schematic diagram according to the paper feedback scanning device of sixth embodiment of the invention.
Embodiment
Fig. 2 shows the schematic diagram according to the paper feedback scanning device with document edge detecting function of first embodiment of the invention.Fig. 3 and Fig. 4 be the partial schematic diagram of first and second state of the paper feedback scanning device of displayed map 2 respectively.To shown in Figure 4, a kind of paper feedback scanning device 10 with document edge detecting function of the present invention comprises one scan module 20, an automatic paper conveying apparatus 30 and a housing 40 as Fig. 2.Paper feedback scanning device 10 also can have platform-type scan function except having the paper feed type scanning function.Scan module 20 has a light source 22, a reflector group 23, an image sensor 24 and a set of lenses 25.Light source 22 sends a light 21 and scans a file P.Reflector group 23 can comprise one or more speculums.Automatic paper conveying apparatus 30 be used for feed documents P by the one scan district 32 on the paper-feeding channel 31 for scan module 20 scannings.On paper-feeding channel 31, be formed with a depressed part 33 corresponding to scanning area 32.This depressed part 33 is to be formed on the guide plate 35 that constitutes paper-feeding channel 31, and the file P by scanning area 32 is between depressed part 33 and scan module 20.Owing to depressed part 33 can't reflect back into image sensor 24 with light penetration mirror group 23 and set of lenses 25, so resulting one second brightness when resulting one first brightness is far below scan module 20 sensing file P during scan module 20 sensing depressed parts 33.By the difference of contrast second brightness and first brightness, promptly can be used to assist to detect the edge P1 of file P.Here, the edge P1 of file is a leading edge.The difference at two ends of the leading edge by the detecting file promptly can be used as the basis of the skewness of file P.
One embodiment of the depressed part of the paper feedback scanning device of Fig. 5 displayed map 2.As shown in Figure 5, depressed part 33 comprises an elongated slot 33A, and elongated slot 33A connects or do not connect the guide plate 35 that constitutes paper-feeding channel 31.The long limit 33A1 of elongated slot 33A is in fact perpendicular to one of the file P direction A that advances.
Another embodiment of the depressed part of the paper feedback scanning device of Fig. 6 displayed map 2.As shown in Figure 6, depressed part 33 comprises a plurality of elongated slot 33B, and these elongated slots 33B connects or do not connect guide plate 35, and L1 in line, and straight line L1 side by side is in fact perpendicular to one of the file P direction A that advances.
Fig. 7 shows the partial schematic diagram according to second state of the paper feedback scanning device of second embodiment of the invention.As shown in Figure 7, be different from the inverted U-shaped depressed part 33 of Fig. 2, the shape of the depressed part 33 of present embodiment can be an inverted V-shaped.
Fig. 8 shows the partial schematic diagram according to first state of the paper feedback scanning device of third embodiment of the invention.As shown in Figure 8, be different from the depressed part 33 of the non-through guide plate 35 of Fig. 2, the depressed part 33 of present embodiment can connect guide plate 35, so that light 21 not the ghost of a chance reflects back in the image sensor 24 of scan module 20.
Fig. 9 shows the partial schematic diagram according to first state of the paper feedback scanning device of fourth embodiment of the invention.As shown in Figure 9, the paper feedback scanning device of present embodiment also comprises a speculum 34, and it is located in the depressed part 33.Equal the theorem of angle of reflection according to incidence angle, make light 21 be reflected, and can be reflected onto in the image sensor 24 without any other light away from an image sensor 24 of scan module 20.The state that is provided with of speculum 34 can be skewed, and the light that mirror 34 reflected that is reflected this moment can not sensed by image sensor 24 yet.The reflector that above-mentioned speculum 34 also can be had a high reflectance replaces.Perhaps, also can use the light absorbed layer with a high light line absorptivity to replace speculum 34, the light absorbed layer also is to be located in the depressed part, to absorb this light.Above-mentioned speculum, reflector and light absorbed layer be can be all or the part be arranged in this depressed part.
Figure 10 shows the partial schematic diagram according to first state of the paper feedback scanning device of fifth embodiment of the invention.In the present embodiment, the state that is provided with of speculum 34 can be horizontal, also can make image sensor 24 under this state sensing less than any light.In addition, speculum 34 also not with file P contact wear, still can effectively prevent the problem of speculum 34 absorption paper scraps.
Figure 11 shows the schematic diagram according to the paper feedback scanning device of sixth embodiment of the invention.As shown in figure 11, the paper feedback scanning device 10 of present embodiment comprises a housing 40, one first scan module 20, one second scan module 50 and an automatic paper conveying apparatus 30.The light source 22 of first scan module 20 is to be used for sending the positive PA that one first light 21 scans a file P, cooperates reflector group 23, set of lenses 25 and image sensor 24 can obtain a front image.First scan module 20 is to be contained in the housing 40.The light source 52 of second scan module 50 is to be used for sending the back side PB that one second light 51 comes scanning document P, cooperates reflector group 53, set of lenses 55 and image sensor 54 can obtain a back side image.Automatic paper conveying apparatus 30 be used for feed documents P by one first scanning area 32 on the paper-feeding channel 31 and one second scanning area 36 to scan for first scan module 20 and second scan module 50 respectively.
In the present embodiment, on paper-feeding channel 31, be formed with one first depressed part 33, and be between first depressed part 33 and first scan module 20 by the file P of first scanning area 32 corresponding to first scanning area 32.So, resulting one second brightness when resulting one first brightness is different from first scan module, 20 sensing file P in the time of can making first scan module, 20 sensings, first depressed part 33 assists to detect the edge P1 of this document P.In addition, on paper-feeding channel 31, be formed with one second depressed part 37 corresponding to second scanning area 36.File P by second scanning area 36 is between second depressed part 37 and second scan module 50, so that resulting one the 4th brightness when resulting one the 3rd brightness is different from second scan module, 50 sensing file P during second scan module, 50 sensings, second depressed part 37, assist to detect the edge P1 of file P.
Second depressed part 37 of present embodiment is with first depressed part 33 similar effect to be arranged, and therefore second depressed part 37 can have structure and the effect that is similar to first depressed part 33, such as those are described in relative configurations and the effect of Fig. 5 to Figure 10.For example, the edge of the file of being detected is the basis as the skewness at the front face of document and the back side, and in addition, second depressed part can comprise an elongated slot, and a long limit of this elongated slot is in fact perpendicular to one of the file direction of advancing.In addition, elongated slot can connect housing 40, with the elongated slot of the perforation guide plate that replaces first depressed part 33.Second depressed part can comprise several elongated slots, and these elongated slots are arranged in a straight line, and can connect this housing, and this straight line is in fact perpendicular to one of the file direction of advancing.Also can be provided with a speculum, a reflector or a light absorbed layer in second depressed part, be used for making second light can not arrive in the image sensor of second scan module.
By above-mentioned structure of the present invention, do not need the background assembly can reach same effect, the for example detecting of a document edge and scanning background different with the file background color etc. is provided, so that carry out the detecting of leading edge, lateral margin and the trailing edge of file, or even the image processing after sweeping in advance, for example frame selects sweep limits etc. automatically.The making of depressed part is very easy, for example, can adopt plastics injection molding method to produce in a large number, helps the reduction of cost.And scanning means of the present invention lacks an assembly than known scanning means, can save assembly cost and assembly cost.In addition, owing to provide the structure of dark-background not need contact with file in the present invention, suffered wearing and tearing in the time of therefore can reducing file and pass through scanning area make scanning process more smooth and easy.
The specific embodiment that is proposed in the detailed description of preferred embodiment only is used for making things convenient for explanation technology contents of the present invention, but not with narrow sense of the present invention be limited to the foregoing description, under the situation that does not exceed spirit of the present invention and following claim scope, the many variations of being done is implemented, and all belongs to scope of the present invention.
The drawing reference numeral explanation
L1 ~ straight line
P1 ~ edge
PA ~ front
PB ~ back side
20 ~ scan module
21 ~ light
22 ~ light source
23 ~ speculum group
24 ~ image sensor
25 ~ set of lenses
30 ~ automatic paper conveying apparatus
31 ~ paper-feeding channel
32 ~ scanning area
33 ~ depressed part
33A ~ elongated slot
33B ~ elongated slot
33A1 ~ length limit
34 ~ speculum
35 ~ guide plate
36 ~ scanning area
37 ~ depressed part
40 ~ housing
50 ~ scan module
51 ~ light
52 ~ light source
53 ~ reflector group
54 ~ image sensor
55 ~ set of lenses
101 ~ background assembly
102 ~ file
103 ~ leading edge
104 ~ scan module
105 ~ scanning window
Claims (20)
1. the paper feedback scanning device with document edge detecting function is characterized in that, comprises:
The one scan module is used for sending a light and scans a file; And
One automatic paper conveying apparatus, being used for presenting described file scans for described scan module by the one scan district on the paper-feeding channel, wherein on described paper-feeding channel, be formed with a depressed part corresponding to described scanning area, and be between described depressed part and described scan module by the described file of described scanning area, so that resulting one second brightness when resulting one first brightness is different from the described file of described scan module sensing during the described depressed part of described scan module sensing, assist to detect an edge of described file.
2. the paper feedback scanning device with document edge detecting function as claimed in claim 1 is characterized in that the described edge of the file of being detected is as a basis of a skewness of described file.
3. the paper feedback scanning device with document edge detecting function as claimed in claim 1 is characterized in that described depressed part comprises an elongated slot, and a long limit of described elongated slot is in fact perpendicular to one of the described file direction of advancing.
4. the paper feedback scanning device with document edge detecting function as claimed in claim 3 is characterized in that, described elongated slot connects a guide plate that constitutes described paper-feeding channel.
5. the paper feedback scanning device with document edge detecting function as claimed in claim 3 is characterized in that, described elongated slot does not connect a guide plate that constitutes described paper-feeding channel.
6. the paper feedback scanning device with document edge detecting function as claimed in claim 1 is characterized in that described depressed part comprises several elongated slots, and described these elongated slots are arranged in a straight line, and described straight line is in fact perpendicular to one of the described file direction of advancing.
7. the paper feedback scanning device with document edge detecting function as claimed in claim 6 is characterized in that, described these elongated slots connect a guide plate that constitutes described paper-feeding channel.
8. the paper feedback scanning device with document edge detecting function as claimed in claim 6 is characterized in that, described these elongated slots do not connect a guide plate that constitutes described paper-feeding channel.
9. the paper feedback scanning device with document edge detecting function as claimed in claim 1 is characterized in that, also comprises:
One speculum is located in the described depressed part, described light is reflected the image sensor away from described scan module.
10. the paper feedback scanning device with document edge detecting function as claimed in claim 1 is characterized in that, also comprises:
One reflector, it has a high reflectance, and is located in the described depressed part, described light is reflected the image sensor away from described scan module.
11. the paper feedback scanning device with document edge detecting function as claimed in claim 1 is characterized in that, also comprises:
One light absorbed layer, it has a high light line absorptivity, and is located in the described depressed part, to absorb described light.
12. the paper feedback scanning device with document edge detecting function is characterized in that, comprises:
One housing;
One first scan module is used for sending the front that one first light scans a file, and described first scan module is contained in the described housing;
One second scan module is used for sending the back side that one second light scans described file; And
One automatic paper conveying apparatus is used for presenting described file and scans to supply described first scan module and described second scan module respectively by one first scanning area on the paper-feeding channel and one second scanning area, wherein:
On described paper-feeding channel, be formed with one first depressed part corresponding to described first scanning area, and the described file by described first scanning area is between described first depressed part and described first scan module, so that resulting one second brightness when resulting one first brightness is different from the described file of the described first scan module sensing during described first depressed part of the described first scan module sensing, assist to detect an edge of described file; And
On described paper-feeding channel, be formed with one second depressed part corresponding to described second scanning area, and the described file by described second scanning area is between described second depressed part and described second scan module, so that resulting one the 4th brightness when resulting one the 3rd brightness is different from the described file of the described second scan module sensing during described second depressed part of the described second scan module sensing, assist to detect the described edge of described file.
13. the paper feedback scanning device with document edge detecting function as claimed in claim 12 is characterized in that the described edge of the described file of being detected is as a basis of a skewness of described file.
14. the paper feedback scanning device with document edge detecting function as claimed in claim 12 is characterized in that, described second depressed part comprises an elongated slot, and a long limit of described elongated slot is in fact perpendicular to one of the described file direction of advancing.
15. the paper feedback scanning device with document edge detecting function as claimed in claim 14 is characterized in that described elongated slot connects described housing.
16. the paper feedback scanning device with document edge detecting function as claimed in claim 12, it is characterized in that, described second depressed part comprises several elongated slots, and described these elongated slots are arranged in a straight line, and described straight line is in fact perpendicular to one of the described file direction of advancing.
17. the paper feedback scanning device with document edge detecting function as claimed in claim 16 is characterized in that, described these elongated slots connect described housing.
18. the paper feedback scanning device with document edge detecting function as claimed in claim 12 is characterized in that, also comprises:
One speculum is located in described second depressed part, described second light is reflected the image sensor away from described second scan module.
19. the paper feedback scanning device with document edge detecting function as claimed in claim 12 is characterized in that, also comprises:
One reflector, it has a high reflectance, and is located in described second depressed part, described second light is reflected the image sensor away from described second scan module.
20. the paper feedback scanning device with document edge detecting function as claimed in claim 12 is characterized in that, also comprises:
One light absorbed layer, it has a high light line absorptivity, and is located in described second depressed part, to absorb described second light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100160952A CN1302657C (en) | 2004-02-03 | 2004-02-03 | Paper feeding scanner with document edge detecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100160952A CN1302657C (en) | 2004-02-03 | 2004-02-03 | Paper feeding scanner with document edge detecting function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1652142A CN1652142A (en) | 2005-08-10 |
| CN1302657C true CN1302657C (en) | 2007-02-28 |
Family
ID=34868206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100160952A Expired - Lifetime CN1302657C (en) | 2004-02-03 | 2004-02-03 | Paper feeding scanner with document edge detecting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1302657C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729730B (en) * | 2009-12-16 | 2011-09-14 | 苏州佳世达电通有限公司 | Scanning device and scanning method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4978992A (en) * | 1988-01-20 | 1990-12-18 | Minolta Camera Kabushiki Kaisha | Original size detecting apparatus of an image forming apparatus |
| US5139339A (en) * | 1989-12-26 | 1992-08-18 | Xerox Corporation | Media discriminating and media presence sensor |
| US5169140A (en) * | 1991-11-25 | 1992-12-08 | Xerox Corporation | Method and apparatus for deskewing and side registering a sheet |
| US5681036A (en) * | 1994-10-07 | 1997-10-28 | Canon Kabushiki Kaisha | Sheet feeding device with control of skew-correction |
| CN2676528Y (en) * | 2004-02-03 | 2005-02-02 | 虹光精密工业（苏州）有限公司 | Sheet feed type scanning device with paper edge detection function |
-
2004
- 2004-02-03 CN CNB2004100160952A patent/CN1302657C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4978992A (en) * | 1988-01-20 | 1990-12-18 | Minolta Camera Kabushiki Kaisha | Original size detecting apparatus of an image forming apparatus |
| US5139339A (en) * | 1989-12-26 | 1992-08-18 | Xerox Corporation | Media discriminating and media presence sensor |
| US5169140A (en) * | 1991-11-25 | 1992-12-08 | Xerox Corporation | Method and apparatus for deskewing and side registering a sheet |
| US5681036A (en) * | 1994-10-07 | 1997-10-28 | Canon Kabushiki Kaisha | Sheet feeding device with control of skew-correction |
| CN2676528Y (en) * | 2004-02-03 | 2005-02-02 | 虹光精密工业（苏州）有限公司 | Sheet feed type scanning device with paper edge detection function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729730B (en) * | 2009-12-16 | 2011-09-14 | 苏州佳世达电通有限公司 | Scanning device and scanning method |
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| Publication number | Publication date |
|---|---|
| CN1652142A (en) | 2005-08-10 |
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