CN1258158C - Scanning method of automatic paper scanner - Google Patents

Abstract

A scanning method, a scanning head can scan the data of a file located in a scanning area by this scanning method, and this scanning method at least comprises: a first step: advancing the file by a first distance, defining the scanning area equal to the area that can be scanned when the file moves the first distance. A second step: the scanning head scans the file. A third step: the scanning head advances a second distance, the second distance is less than the first distance. A fourth step: repeating the second step and the third step until the scanning head scans all the data of the file located in the scanning area. A fifth step: repeating the first step, the second step, the third step and the fourth step until the scanning head scans all the areas to be scanned of the file.

Description

Scanning method of automatic paper scanner

technical field

The invention relates to a scanning method of an automatic paper-feeding scanner, and in particular to a scanning method of an automatic paper-feeding scanner capable of improving resolution.

Background technique

With the great improvement of computer performance and the high development of Internet and multimedia technology, in addition to using digital cameras to directly capture image patterns, other image input operations related to documents or pictures require optical scanners to capture text or The analog image of the pattern is converted into a digital signal output, which is helpful for users to display, identify, edit, store and output image files on computers or other electronic products.

According to the input method of document images, optical scanners can be divided into Pocket Scanner, Sheet Feed Scanner, Drum Scanner and Flatbed Scanner (Flatbed Scanner) and so on. As far as the automatic paper scanner is concerned, it has entered the realm of 600dpi optical resolution, and almost all of them adopt the scanning structure of the contact image sensor (CIS), so generally speaking, the volume is small, suitable for following the notebook Take the computer with you.

Please refer to FIG. 1 , which is a schematic cross-sectional view of a known automatic paper-feeding scanner. The automatic paper scanner 100 generally includes a paper feeder 110 and a scanning module 130 , wherein the paper feeder 110 is used to transport the paper 150 , and the scanning module 130 is used to scan the paper 150 delivered through the paper feeder 110 . The paper feeder 110 includes a conveying approach 112, a plurality of conveying rollers 114 and a scanning port 116, wherein the paper 150 can be conveyed in the conveying approach 112, the conveying rollers 114 are arranged on the conveying approach 112, and the conveying rollers 114 are Two pairs are arranged together to clamp the front and back sides of the paper 150 respectively. When the motor (not shown) drives the transmission roller 114 to rotate, the transmission roller 114 can drive the paper 150 to move in the conveying direction 120, and the pivot of the transmission roller 114 The axis 115 is perpendicular to the transport direction 120 of the paper 150 . In addition, the scanning port 116 is located right below the paper feeder 110 . The scanning module 130 includes a fixed scanning head 132 , the scanning head 132 and the scanning module 130 are fixed to each other, and through the scanning port 116 of the paper feeder 110 , the scanning head 132 can scan the paper 150 delivered through the paper feeder 110 .

In the above-mentioned automatic paper scanner 100, the scanning head 132 is fixed in the scanning module 130, and the paper 150 is driven in microsteps by the motor and the transport roller 114. When the paper 150 passes through the scanning port 116, the scanning head 132 Paper 150 can be scanned. The resolution of such scanning depends on the accuracy with which the motor and the transport rollers 114 can transport the paper 150 . However, the resolution that the automatic paper scanner 100 can scan is limited.

Contents of the invention

Therefore, the object of the present invention is to provide a scanning method for an automatic paper-feeding scanner, which can greatly improve the scanning resolution.

In order to achieve the above-mentioned purpose of the present invention, a scanning method of an automatic paper-feeding scanner is proposed, which is used to scan a document, and the document will be sent to a paper feeder, which is set up on a scanner and scanned The device has a scanning head and a transmission mechanism, the transmission mechanism can drive the scanning head, so that the scanning head can scan the documents sent to the paper feeder in a scanning area, and the scanning method at least includes:

The first step: advance the document by a first distance through the document feeder, and define the above-mentioned scanning area equal to the area that can be scanned when the document advances the first distance.

The second step: the scanning head scans the document.

The third step: advancing the scanning head by a second distance through the transmission mechanism, the second distance being smaller than the first distance.

The fourth step: repeating the second step and the third step until the scanning head finishes scanning the data of the document located in the scanning area.

Fifth step: Repeat the first step, the second step, the third step and the fourth step until the scanning head scans all the areas to be scanned of the document.

To sum up, the scanning method of the automatic paper scanner of the present invention can control the moving resolution of the scanning head much higher than the moving resolution of the document, so the scanning resolution of the document can be greatly improved.

According to a preferred embodiment of the present invention, wherein the paper feeder includes a transport approach and a plurality of transport rollers, the document can be transported in the transport approach, the transport rollers are arranged on the transport approach, and the transport rollers are arranged in pairs, The front and back sides of the document can be clamped separately, and the document can be driven when the transmission roller rotates.

In addition, the paper feeder also includes a scanning port through which the scanning head can scan the document, and the length of the scanning port parallel to the conveying direction of the document is greater than or equal to the length of the first distance.

According to a preferred embodiment of the present invention, the scanning head can scan the document in a reciprocating scanning manner, or scan the document in a unidirectional scanning manner.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a known automatic paper-feeding scanner;

2 is a schematic cross-sectional view of an automatic paper-feeding scanner according to a preferred embodiment of the present invention;

FIG. 3 is a schematic diagram of the operation of the automatic paper scanner according to a preferred embodiment of the present invention.

100: scanner 110: document feeder

112: Transmission Approach 114: Transmission Roller

115: Pivot 116: Scan port

120: Transmission direction 130: Scanning module

132: fixed scanning head 150: paper

200: scanner 210: paper feeder

212: Transmission Approach 214: Transmission Roller

215: Pivot 216: Scan port

220: Transmission direction 230: Scanning module

232: Scanning head 234: Transmission mechanism

250: File 260: Scan area

272: First position 274: Second position

276: Third position 278: Fourth position

282: First scanning direction 284: Second scanning direction

d: the first distance s: the second distance

Detailed ways

Please refer to FIG. 2 , which is a schematic cross-sectional view of an automatic paper scanner according to a preferred embodiment of the present invention. The automatic paper-feeding scanner 200 includes a document feeder 210 and a scanning module 230 , wherein the document feeder 210 is used to transmit a document 250 , and the scanning module 230 is used to scan the document 250 delivered through the document feeder 210 . The paper feeder 210 includes a transport approach 212, a plurality of transport rollers 214 and a scanning port 216, wherein the document 250 can be transported in the transport approach 212, the transport rollers 214 are arranged on the transport approach 212, and the transport rollers 214 are two The two are arranged together to clamp the front and back of the document 250 respectively. When the stepping motor (not shown) drives the transmission roller 214 to rotate, the transmission roller 214 can drive the document 250 to move in the transmission direction 220, and the transmission roller 214 The pivot 215 is perpendicular to the transport direction 220 of the document 250 . In addition, the scan port 216 is located right below the paper feeder 210 . The scanning module 230 includes a scanning head 232 and a transmission mechanism 234 , the transmission mechanism 234 can drive the scanning head 232 , and through the scanning opening 216 of the document feeder 210 , the scanning head 232 can scan the document 250 delivered through the document feeder 210 . The transmission mechanism 234 is, for example, composed of a gear set (not shown) and a stepping motor (not shown). The scanning head 232 can be moved forward in microsteps through the gear set of the transmission mechanism 234 and the stepping motor, and the transmission mechanism 234 The gear set and the stepping motor can be designed through known mechanism principles, and will not be repeated here.

Please refer to FIG. 2 and FIG. 3 , wherein FIG. 3 is a schematic diagram of the operation of the automatic paper-feeding scanner according to a preferred embodiment of the present invention. After the document 250 is fed into the document feeder 210 , the document 250 can advance a first distance d each time in microsteps through the control of the stepping motor and the transmission rollers 214 in the document feeder 210 . However, since the accuracy of the document 250 conveyed by the stepping motor and transport rollers 214 in the document feeder 210 is limited, the moving resolution of the scanning head 232 can be controlled very high. Action and movement of the scan head 232 increases the resolution of the scanner 200 . After the document 250 moves the first distance d to the conveying direction 220, the document 250 is stopped, and at this moment, the data of the document 250 located in the scanning area 260 can be scanned, wherein the scanning area 260 is equal to what the document 250 can travel the first distance d. The area to scan. Assuming that the central point of the scanning element of the scanning head 232 is at the first position 272 now, after the document 250 stops, the scanning head 232 just scans the data corresponding to the document 250 in the first position 272 area; The scan direction 282 moves a second distance s, and moves to the second position 274, wherein the first distance d is greater than the second distance s, and then the scan head 232 scans the data of the document 250 corresponding to the second position 274 area; then scans The head moves a second distance s toward the first scanning direction 282 again, and moves to the third position 276, and then the scanning head 232 scans the data of the document 250 corresponding to the third position 276 area; A scanning direction 282 moves a second distance s to move to a fourth position 278 , and then the scanning head 232 scans the data of the document 250 corresponding to the area of the fourth position 278 . It should be noted that, from the first position 272 to the fourth position 278 , the total area scanned by the scanning head 232 is less than or equal to the area of the scanning area 260 . In addition, in the design of the scanning port 216 , the length of the scanning port 216 parallel to the conveying direction 220 of the document 250 must be designed to be greater than or equal to the length of the first distance d.

Then, move the document 250 to the conveying direction 220 for a first distance d, and then stop the document 250. At this time, the scanned part of the document 250 will advance to the non-scanning area, and the unscanned part will advance to scan area 260. At this time, the central point of the scan element of the scan head 232 is at the fourth position 278. After the document 250 stops, the scan head 232 scans the data corresponding to the file 250 in the area of the fourth position 278; then the scan head 232 scans to the second position Direction 284 moves a second distance s, and moves to the third position 276, then scanning head 232 just scans the data corresponding to the document 250 of the 3rd position 274 area; Then scanning head 232 moves toward second scanning direction 284 again a first Two distances s, and move to the second position 274, then scanning head 232 just scans the data corresponding to the document 250 of the second position 274 area; Then, scanning head 232 moves toward the second scanning direction 284 again a second distance s, And move to the first position 272 , then the scanning head 232 scans the data of the document 250 corresponding to the area of the first position 272 .

In this way, the scanner 200 keeps repeating the above-mentioned reciprocating scanning until the scanning head 232 scans all the areas to be scanned of the document 250 .

In the above-mentioned scanning method of the automatic paper scanner, compared with the accuracy of the document 250 conveyed by the stepping motor and the conveying roller 214 in the document feeder 210, the moving resolution of the scanning head 232 can be controlled to be higher. , so the scanning resolution of the document 250 can be greatly improved.

In the preferred embodiment above, after the document advances a first distance, the scanning head scans the document at four positions (the first position, the second position, the third position and the fourth position), wherein the adjacent Each position is equidistant from each other. However, the application of the present invention is not limited to the above method, and the scanning head can also be moved to two, three, five or more equally divided positions to scan the document. Therefore, the automatic paper scanner can provide a variety of scanning resolutions, and the user can select one of the scanning resolutions for scanning, and the user must also put the document into the automatic paper scanner, to scan this file. Afterwards, the user activates the automatic paper-feeding scanner, and the scanning method of the scanner is as described above, which will not be repeated here.

In the above-mentioned preferred embodiment, the scanning head scans all the areas to be scanned in the document in a reciprocating scanning manner, but the application of the present invention is not limited to the above-mentioned manner, and the scanning head can also use a unidirectional scanning method Scans all areas of the document to be scanned, as described below. Please refer to FIG. 2 and FIG. 3 , after the scanning head 232 moves from the first position 272 to the fourth position 278 by moving the second distance s in microsteps each time, the document feeder 210 will drive the document 250 forward, At this time, the scanning head 232 moves to the first position 272. After the document 250 advances the first distance d, the scanning head 232 scans from the first position 272 to the fourth position by moving the second distance s in microsteps each time. Position 278. In this way, the above-mentioned one-way scanning manner is repeated until the scanning head 232 has scanned all the areas to be scanned of the document 250 . The advancing direction of the document 250 may be the same as that of the scanning head 232 or opposite to the advancing direction of the scanning head 232 .

To sum up, the scanning method of the automatic paper scanner of the present invention can control the moving resolution of the scanning head much higher than the moving resolution of the document, so the scanning resolution of the document can be greatly improved.

Claims (12)

1. the scan method of an automatic paper feeding scanner, this automatic paper feeding scanner comprises a paper feeder, one scan head and a gear train at least, it is characterized in that, this scan method comprises at least:

First step: make this document one first distance of advancing by this paper feeder, define this scanning area equal this document advance this first apart from the time the area that can scan;

Second step: this scanner head scanning this document;

Third step: make this scanner head second distance that advances by this gear train, this second distance is less than this first distance;

The 4th step: repeat this second step and this third step, scanned up to this scanner head till the data of this document that is positioned at this scanning area; And

The 5th step: repeat this first step, this second step, this third step and the 4th step, till all desire scanning areas of the scanned this document of this scanner head.

2. the scan method of automatic paper feeding scanner as claimed in claim 1 is characterized in that, this scanner head is the reciprocating type flyback retrace that comes.

3. the scan method of automatic paper feeding scanner as claimed in claim 1 is characterized in that, this scanner head is a simple scanning.

4. the scan method of automatic paper feeding scanner as claimed in claim 1, it is characterized in that, a plurality of conveying rollers of this paper feeder rotate, transmit the middle transmission of leading the way to drive this document at one of this paper feeder, wherein, those conveying rollers are configured on this transmission leads the way in pairs, and tow sides of clamping this document respectively.

5. the scan method of automatic paper feeding scanner as claimed in claim 1, it is characterized in that, by the one scan mouth of this paper feeder, this scanner head scanning this document, and the length of direction of transfer that should scanning mouthful be parallel to this document is more than or equal to the length of this first distance.

6. the scan method of automatic paper feeding scanner as claimed in claim 1 is characterized in that, the working direction of this document is same as the working direction of this scanner head.

7. the scan method of automatic paper feeding scanner as claimed in claim 1 is characterized in that, the working direction of this document is in contrast to the working direction of this scanner head.

8. the control method of the scanning resolution of an automatic paper feeding scanner is characterized in that, this automatic paper feeding scanner provides multiple scanning resolution, and the control method of the scanning resolution of this automatic paper feeding scanner comprises:

First step: the one scan head of this automatic paper feeding scanner scans a file with selected scanning resolution;

Second step: when this automatic paper feeding scanner was activated, this automatic paper feeding scanner made this document one first distance of advancing, definition one scan zone equal this document advance this first apart from the time the area that can scan;

Third step: this scanner head scanning this document;

The 4th step: this scanner head second distance that advances, this second distance is less than this first distance;

The 5th step: repeat this third step and the 4th step, scanned up to this scanner head till the data of this document that is positioned at this scanning area; And

The 6th step: repeat this second step, this third step, the 4th step and the 5th step, till all desire scanning areas of the scanned this document of this scanner head.

9. the control method of the scanning resolution of automatic paper feeding scanner as claimed in claim 8 is characterized in that, this scanner head is the reciprocating type flyback retrace that comes.

10. the control method of the scanning resolution of automatic paper feeding scanner as claimed in claim 8 is characterized in that, this scanner head is a simple scanning.

11. the control method of the scanning resolution of automatic paper feeding scanner as claimed in claim 8 is characterized in that, the working direction of this document is same as the working direction of this scanner head.

12. the control method of the scanning resolution of automatic paper feeding scanner as claimed in claim 8 is characterized in that, the working direction of this document is in contrast to the working direction of this scanner head.

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