KR101016655B1 - ?? scanner having function of ?? scanning and method of scanning thereof - Google Patents

Abstract

The present invention provides a scanner, comprising: a main body having a scan glass for scanning an original, a main body having a flat glass capable of loading an original, and a cover for opening and closing the flat glass of the main body; A document is provided on the side, and has a conveying roller member made up of a plurality of rollers therein, and a document feeder and a document discharge port are formed up and down side by side on the rear side, and the document is fed through the document feeder on the front side. An automatic document feeder in which a document exposure port is formed so that a portion of the document glass is exposed to the outside of the flat glass; And a scanning roller member driving motor configured to transmit a driving force to the conveying roller member so that the conveying roller member is selectively rotated forward or reversely, the scanning unit dividing and scanning an original exceeding a scan capacity of the scan sensor; And an image processing unit which performs image processing for combining the two images dividedly scanned by the scanning unit.

Scanner, CCDM, CIS, A4, A3

Description

A4 scanner with A3 paper scanning and its scanning method {A4 scanner having function of A3 scanning and method of scanning}

The present invention relates to a scanner, and more particularly, to an A4 scanner having an A3 paper scanning function capable of scanning an A3 document with an A4 dedicated scan sensor, and a scanning method thereof.

In general, a scanner (image forming apparatus) is an apparatus for printing an input image signal on a printing medium, and this includes a printer, a copying machine, or a multifunction apparatus incorporating these functions into one apparatus.

Such a scanner includes a scanning section for scanning an image recorded on an original through a scanning means. In order for the scanning unit to read information from the original, the scanning sensor of the scanning unit needs to move or an original document which is an object needs to move.

Here, the method of fixing the original and moving the scan sensor is called a flat bed type, and the method of stopping the scan sensor and moving the original is called a sheet feed type. Modern multifunction machines employ both of these methods, and an example of such a scanner is shown in FIG.

As shown in the figure, the scanner 50 includes a cover 10 and a body 30. The cover 10 is provided with an automatic document feeder 20, and the main body 30 is provided with a scan sensor 40 for scanning an original supplied by the automatic document feeder 20.

Here, the scan sensor 40 uses a CCDM (CCD Module) with a built-in charge coupled device (CCD), which is one of the imaging devices that form an image of a subject by using electric charges, or a CIS (CMOS Image Sensor) for scanning an original. May be used.

In the automatic document feeder 20, a document to be fed generally has a conveying path P of "C" shape, and the document loaded on the document table 21 is a pickup roller 22 and a feed roller 23. The upper surface of the scan sensor 40 is introduced through the feeding roller 24. The document is scanned by the scan sensor 40 and then flows out through the discharge roller 25.

In this way, the automatic document feeder 20 can easily scan a plurality of sheets of paper.

In addition, the document can be scanned without going through the automatic document feeder 20. To this end, the cover 10 is first opened, and then a scanning operation is performed in a state in which the originals are aligned with the flat glass 31 provided on the upper surface of the main body 30. Then, the scan sensor 40 scans the original while reciprocating the lower part of the scan window in the direction shown by the arrow A. FIG.

Therefore, while the scan sensor 40 moves, it is possible to scan a single sheet of paper without using the automatic document feeder 20.

On the other hand, the conventional multifunction device having a scanning function as described above is provided with a scan sensor 40 in accordance with the size of the A4 paper used most. Therefore, in order to scan A3 paper larger than A4 paper, an A3-only scanner was needed.

However, A3-only scanners had to use a scan sensor that was twice as large as the scan sensor used in conventional A4 paper scanners, and the increase in the size of these scan sensors directly connected to the increase in the manufacturing cost of the product, so that offices where A3 scanners are not frequently used Or at home, it was hard to buy a separate A3 scanner.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an A4 scanner having an A3 paper scanning function capable of scanning an A3 document with an A4 exclusive scan sensor, and a scanning method thereof.

According to an aspect of the present invention for achieving the above object, in the scanner comprising a main body having a plate glass capable of loading the document on the top, and a cover for opening and closing the plate glass of the main body, the main body A scan sensor built into the scan document; It is provided on the rear side of the cover and has a conveying roller member made up of a plurality of rollers therein, the document feeder and the document discharge port on the rear side is formed side by side up and down, and through the document feeder on the front side An automatic document feeder in which a document exposure port is formed so that a part of the loaded document is exposed to the outside of the flatbed glass; And a scanning roller member driving motor configured to transmit a driving force to the conveying roller member so that the conveying roller member is selectively rotated forward or reversely, the scanning unit dividing and scanning an original exceeding a scan capacity of the scan sensor; And an image processing unit which performs image processing for combining the two images divided and scanned through the scanning unit.

Preferably, the feed roller member includes a feed roller provided adjacent to the document feeder, and a feed roller installed adjacent to the document exposure port, wherein the feed roller is rotated forward by the feed roller member drive motor. It is characterized in that the reversely fed document fed to the document exposure port or the document discharge port side.

More preferably, the scanning unit includes a document scanning button for outputting a signal to scan a document loaded in the document feeder; And a controller configured to receive a signal from the original scan button and output a signal to operate the scan sensor and the feed roller member driving motor, wherein the controller is configured to generate the scan sensor and the controller according to an operation signal of the original scan button. A signal is outputted to the feed roller member driving motor, so that the document adhered to the flat glass is divided and scanned.

More preferably, the scanning unit further includes an original size detecting sensor installed at the original document inlet to detect the size of the incoming document, and the control unit detects an operation signal of the original scanning button and a detection result of the original size detecting sensor. According to, characterized in that for outputting a signal to the scan sensor and the transfer roller member driving motor to allow the original document in close contact with the plate glass to be selectively divided scan.

Preferably, the scan sensor scans at least half of the originals so that the divided scans of the two images can be overlapped with each other when the divided scans of the originals occur.

The present invention also includes the steps of: a) aligning the short side of the document with the document feeder; b) clicking the scan original button; c) a control unit outputs a signal to a feed roller member driving motor according to the signal of the original scan button so that a part of the original aligned with the document feeder is brought into close contact with the platen glass; d) a control unit outputting a signal to a scan sensor such that a portion of the document adhered to the flat glass is scanned; e) a control unit outputting a signal to a feed roller member driving motor such that the remaining portion of the unscanned original adheres to the flat glass; f) a control unit outputting a signal to the scan sensor such that the remaining portion of the original is scanned; And g) an image processing unit performing image processing of merging the two images scanned by the scan sensor.

Preferably, the step between the step b and the step c, further comprising the step of detecting the size of the document aligned on the flat glass through the document size sensor, the control unit is a result of the detection of the document size sensor, The steps c, d, e, f, and g are performed when the document aligned on the flat glass is larger than the scan capacity of the scan sensor.

More preferably, the scan sensor scans each of the half or more of the originals so that a part of two divided scan images overlap each other.

The A4 scanner having an A3 paper scanning function and a scanning method thereof according to the present invention can scan an A3 original with an A4 dedicated scan sensor.

Therefore, there is no need to provide a dedicated A3 scan sensor for scanning A3 originals, there is an effect that can significantly reduce the product manufacturing cost.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of an A4 scanner having an A3 paper scanning function according to the present invention.

2 is a perspective view schematically showing an A4 scanner having an A3 paper scanning function according to the present invention, and FIG. 3 is a side configuration diagram schematically showing an A4 scanner having an A3 paper scanning function according to the present invention. 3A is an enlarged view of a portion A shown in FIG. 3, and FIG. 4 is a block diagram schematically showing a form of a scanning unit of an A4 scanner having an A3 paper scanning function according to the present invention.

2 to 4, the A4 scanner having the A3 paper scanning function according to the present invention includes a main body 100 having a flatbed glass 110 so as to load an original on top, and a main body 100. A scanner including a cover 120 for opening and closing the platen glass 110 provided on the upper portion of), an image that combines the scanning unit 200 and the scanned image through the scanning unit 200 and the scanning unit 200 to scan the original It is configured to include a processing unit 300.

The scanning unit 200 transfers driving the scan sensor 210, the automatic document feeder 220 installed on one side of the cover 120, and the feed roller member 221 installed inside the automatic document feeder 220. The roller member drive motor 230 is included.

The scan sensor 210 is a CCDM or a CIS (CMOS Image Sensor), which is a charge coupled device (CCD) module. The originals fed through the apparatus 220 are scanned. In addition, the scan sensor 210 may be installed to reciprocate from side to side to scan an original placed on the flat glass 110.

In general, this scan sensor 210 is designed so that its length corresponds to the short side length (210 mm) of A4 paper to scan an A4 sized document. That is, the scan sensor 210 is designed to scan an original along the long side portion (297 mm) of the A4 sheet in a state aligned side by side with the short side portion (210 mm) of the A4 sheet.

The automatic document feeder 220 is installed on the rear side of the cover 120, precisely, at a position where the scan sensor 210 is installed, and is configured to automatically feed and eject a plurality of documents.

Specifically, the automatic document feeder 220 includes a feed roller member 221 made up of a plurality of rollers 221a, 221b, and 221c therein, and on the rear side thereof, an document feeder 222 and an original discharge port ( 223 are spaced up and down spaced apart side by side, the front side of the document exposure port 224 is formed so that a portion of the document fed through the document feeder 222 is exposed to the outside of the platen glass 110. It is.

Further, on the rear sides of the document feeder 222 and the document discharge port 223, the document feeder 222a and the document discharge tray 223a extended at a predetermined angle upward are respectively provided.

Then, the feed roller member 221 installed inside the automatic document feeder 220 is installed adjacent to the document feeder 222 to feed the document loaded on the document feeder 222a toward the platen glass 110 side. It is provided adjacent to the paper feed rollers 221b and 221c and the document exposure port 224 to expose the fed document to the outside of the document exposure port 224 or to the document output tray 223a through the document discharge port 223. It is comprised including the feed roller 221a which discharge | releases.

At this time, the feed roller 221a serves to cause the fed document which is fed by being rotated forward or reverse by the feed roller member driving motor 230 to be described later to the document exposure port 224 or the document discharge port 223 side. .

The feed roller member drive motor 230 feeds the rollers 221b and 221c and the feed rollers 221a through a plurality of gears (not shown) to transmit driving force to the feed rollers 221b and 221c and the feed rollers 221a. It is coupled with, the transfer roller 221a transmits a driving force to the transfer roller (221a) so that the forward or reverse rotation.

When the scanning unit 200 configured as described above scans an A3 document, a part of the A3 document loaded in the document feeder 222 is in close contact with the platen glass 110 while the feed roller 221a rotates. In a state where it is positioned outside the flat glass 110, the scan sensor 210 scans an original in close contact with the flat glass 110. After that, while the feed roller 221a is rotated again, the remaining portion of the unscanned original is brought into close contact with the platen glass 110, and the scan sensor 210 is kept with the plated glass 110. Scan Then, the feed roller 221a is rotated again so that the document whose scan operation is completed is discharged to the outside through the document discharge port 223.

Accordingly, the scan sensor 210 scans the entire A3 original while reciprocating twice. That is, the A3 paper, which is twice the size of its own scanning capacity, can be scanned using the general scan sensor 210 that can scan only A4 originals.

The image processing unit 300 performs normal image processing for combining two images (A4 sized images) scanned by the scanning unit 200 to generate an A3 sized scanned image.

As described above, the A4 scanner having the A3 paper scanning function according to the present invention can scan an A3 document using an existing scan sensor (for A4 only).

5 is a flowchart schematically illustrating a scanning method of an A4 scanner having an A3 paper scanning function according to the present invention, and FIGS. 6A to 6D illustrate a scanning process of an A4 scanner having an A3 paper scanning function according to the present invention. Is a perspective view schematically showing.

As shown in Figs. 2 to 6D, the scanning unit 200 of the A4 scanner having the A3 paper scanning function according to the present invention, the document scanning button 240 for outputting a signal to perform the scanning function of the A3 original And a controller 290 for outputting a signal such that the scanning unit 200 scans an A3 original according to the signal of the original scanning button 240.

Although not shown in the drawing, the original scanning button 240 is formed on one side of the main body 100 so that a user can click to scan an A3 original, and the flatbed glass 110 is provided through the automatic document feeder 220. ) A3 outputs a signal to the control unit 290 to scan the A3 document in close contact.

The controller 290 receives the signal output from the original scan button 240 and outputs a signal to operate the scan sensor 210 and the transfer roller member driving motor 230.

Specifically, the scanning method of an A3 document is explained as follows.

First, as shown in FIG. 6A, the user aligns the document 10 with the document feeder 222a of the document feeder 220 to scan the A3 document 10 (S100), and then the document scan button ( 240) (S200).

Then, the controller 290 receives the operation signal of the document scan button 240 and outputs a control signal to the feed roller member driving motor 230 to drive the feed roller member 221. As a result, about half of the document 10 loaded on the document feeder 222a comes into close contact with the platen glass 110, and the feed roller 221a is rotated forward, as shown in FIG. 6B. The state is loaded on the zone (222a) (S300).

At the same time, the controller 290 outputs a signal to the scan sensor 210 such that a part of the A3 document 10 in close contact with the flat glass 110 is scanned. Accordingly, the scan sensor 210 primarily scans a portion of the A3 document adhered to the flat glass 110 while reciprocating from side to side (S400).

At this time, it is preferable that the scan sensor 210 scans the A3 document to a size larger than the A4 size, which is half the size of the A3 document.

When the first scan is completed and a predetermined time elapses, the controller 290 outputs a signal to the feed roller member driving motor 230 to drive the feed roller member 221 again.

Then, the feed roller 221a is rotated forward, and as shown in FIG. 6C, the unscanned portion of the A3 original 10 is exposed while the scanned portion of the A3 original 10 is exposed to the outside of the original exposure port 224. The part is in a state of being in close contact with the flat glass 110 (S500).

At the same time, the controller 290 outputs a signal to the scan sensor 210 such that the A3 document 10 in close contact with the flat glass 110 is scanned. Accordingly, the scan sensor 210 secondarily scans the remaining portion of the unscanned A3 document adhered to the flat glass 110 while reciprocating from side to side (S600).

At this time, it is preferable that the scan sensor 210 scans the A3 document to a size larger than the A4 size, which is half the size of the A3 document. This is to allow the merged portions of the two images to be smoothly formed by overlapping the two scanned images, that is, overlapping, in the process of performing image processing to be described later.

As such, after the two scan operations are completed, the controller 290 outputs a signal to the feed roller member 221 so that the feed roller 221a rotates in reverse. Thereby, as shown in FIG. 6D while the feed roller 221a rotates in reverse, the A3 document 10 is discharged through the document discharge port 223 and loaded on the document discharge tray 223a.

When all the divided scans of the A3 original are completed, the image processing unit 300 generates an image of one A3 size by performing image processing for combining two divided scanned images (A4 size).

Therefore, the A3 original can be scanned using the A4 original scan sensor 210.

On the other hand, the A4 scanner having the A3 paper scanning function according to the present invention can perform the divided scan operation by the method shown in Figs. 7A to 7D.

First, as shown in FIG. 7A, when the user loads the document feeder 222a of the document feeder 220 to scan an A3 document, and then presses the document scan button 240, the control unit 290 In response to the operation signal of the original scan button 240, the feed roller member 221 outputs a signal to the feed roller member driving motor 230 to drive the feed roller member 221.

Then, about half of the document 10 loaded on the document feeder 222a comes into close contact with the platen glass 110, and the feed roller 221a is rotated forward as shown in FIG. 7B. It is in a state exposed outside of 224.

At the same time, the control unit 290 outputs a signal to the scan sensor 210 to scan a portion of the A3 document adhered to the flat glass 110. Accordingly, the scan sensor 210 primarily scans a part of the A3 document 10 in close contact with the flat glass 110 while reciprocating from side to side.

When the first scan is completed and a predetermined time has elapsed, the controller 290 outputs a control signal to the feed roller member driving motor 230 to drive the feed roller member 221 again.

This time, as the feed roller 221a is reversed and shown in Fig. 7C, the portion scanned as the A3 original 10 is retracted is positioned inside the automatic document feeder 220 and the A3 original 10 is scanned. The remaining portion, which is not, is brought into close contact with the flat glass 110.

At the same time, the controller 290 outputs a signal to the scan sensor 210 such that the A3 document 10 in close contact with the flat glass 110 is scanned. Accordingly, the scan sensor 210 secondarily scans the A3 document adhered to the flat glass 110 while reciprocating from side to side.

In this way, after the two scanning operations are finished, the control unit 290 outputs a signal to the feed roller member 221 so that the feed roller 221a continues to rotate in reverse. Thereby, as shown in FIG. 7D while the feed roller 221a rotates in reverse, the A3 document 10 is discharged through the document discharge port 223 and loaded on the document discharge tray 223a.

As such, when all the divided scans of the A3 original are completed, the image processing unit 300 generates an image of one A3 size by performing image processing for combining two separately scanned images (A4 size).

Therefore, the A3 original can be scanned using the A4 original scan sensor 210.

8 is a block diagram schematically showing another form of a scanning unit of an A4 scanner having an A3 paper scanning function according to the present invention, and FIG. 9 is a scan of an A4 scanner having an A3 paper scanning function according to the present invention. A flowchart schematically illustrating another form of the method.

As shown in the figure, the scanning unit 200 of the A4 scanner with the A3 paper scanning function according to the present invention is a document scanning button 240, the platen glass 110 for outputting a signal to perform the scanning function of the A3 original The scanning unit 200 outputs a signal to scan the A3 original according to the signal of the original size detection sensor 250 and the original size detection sensor 250 and the original scan button 240 that detect the size of the original aligned on the screen. The control unit 290 further includes.

Although not specifically illustrated in the drawing, the original size detection sensor 250 is installed in the document feeder 222a to detect the size of the document loaded in the document feeder 222a. At this time, the controller 290 determines that the document aligned with the document feeder 222a is an A3 document when the document aligned on the document feeder 222a is exposed to the outside of the document feeder 222a. If the document aligned with the zone 222a is not exposed outside the document feeder 222a, it is determined as an A4 document.

The control unit 290 receives the signals output from the original scan button 240 and the original size detection sensor 250, and outputs a signal to operate the scan sensor 210 and the feed roller member driving motor 230, thereby providing an A3 document. In this case, a split scan is performed.

As such, the scanning method of the A4 scanner with the A3 paper scanning function further including the original size detection sensor 250 shown in FIGS. 8 and 9 is the same as the scanning method shown in the flowchart of FIG. After clicking the scan original button 240, the following steps are further included.

Specifically, when the user clicks on the original scan button 240 (S200), the original size detection sensor 250 detects the size of the original aligned with the document feeder 222a, and transmits a signal to the control unit 290. (S210).

Subsequently, the controller 290 determines whether the size of the aligned originals is A3 size according to the signal received from the original size detection sensor 250 (S220).

As a result of this determination, if the size of the original is outside the scan capacity range of the scan sensor 210, that is, the size is A3, the control unit 290 receives the operation signal of the original scan button 240 to receive the feed roller member 221. A signal is output to the feed roller member drive motor 230 to be driven.

Then, about half of the document 10 loaded on the document feeder 222a is rotated forward by the feed roller 221a to be in close contact with the flat glass 110 (S300).

Subsequently, the above-described steps S300 to S700 are divided to scan the A3 document to generate an A3 size image.

On the other hand, as a result of the determination in step S220, when the size of the original is within the scan capacity range of the scan sensor 210, that is, A4 size, the control unit 290 drives the feed roller member so that the feed roller member 221 is driven. By outputting a signal to the motor 230, the entire A4 document is brought into close contact with the flat glass 110 (S230).

In addition, the controller 290 outputs a signal to the scan sensor 210 such that the A4 document adhered to the flat glass 110 is scanned. Accordingly, the scan sensor 210 scans the entire A4 document adhered to the flat glass 110 while reciprocating from side to side (S240).

As such, the A4 original or A3 original can be selectively scanned by controlling the operation of the scan sensor 210 and the feed roller member driving motor 230 according to the size of the original aligned on the document feeder 222a.

In the present invention, a scanner for scanning an A3 document using an A4 dedicated scan sensor has been described. However, the scanner scanning an A2 document using an A3 dedicated scan sensor scans an original having a size twice the scanning capacity of the scan sensor. All scanners should be decomposed as being within the scope of the present invention.

Therefore, the protection scope of the present invention should be interpreted by the following claims. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It should be interpreted that it is included in the scope of right.

1 is a view showing an example of a scanner according to the prior art,

2 is a perspective view schematically showing an A4 scanner having an A3 paper scanning function according to the present invention;

3 is a side configuration diagram schematically showing an A4 scanner having an A3 paper scanning function according to the present invention;

3A is an enlarged view of a portion A shown in FIG. 3,

4 is a block diagram schematically showing one form of a scanning unit of an A4 scanner having an A3 paper scanning function according to the present invention;

5 is a flowchart schematically showing a scanning method of an A4 scanner having an A3 paper scanning function according to the present invention;

6A to 6D are perspective views schematically illustrating a scanning process of an A4 scanner having an A3 paper scanning function according to the present invention;

7A to 7D are perspective views schematically showing another scanning process of an A4 scanner having an A3 paper scanning function according to the present invention;

8 is a block diagram schematically showing another form of a scanning unit of an A4 scanner having an A3 paper scanning function according to the present invention;

Fig. 9 is a flow chart schematically showing another form of the scanning method of the A4 scanner with the A3 paper scanning function according to the present invention.

-Explanation of symbols for the main parts of the drawings-

100: main body 110: flat glass

120: cover 200: scanning unit

210: scan sensor 220: automatic document feeder

221: feed roller member 221a: feed roller

221b, 221c: Feed roller 222: Document feeder

223: document discharge port 224: document exposure port

230: drive roller member drive motor 240: original scan button

250: Original size detection sensor 290: control unit

300: image processing unit

Claims (8)

A scanner comprising a main body having a flat glass capable of loading an original on the top, and a cover for opening and closing the flat glass of the main body, A scan sensor embedded in the main body to scan an original; It is provided on the rear side of the cover and has a conveying roller member made up of a plurality of rollers therein, the document feeder and the document discharge port on the rear side is formed side by side up and down, and through the document feeder on the front side An automatic document feeder in which a document exposure port is formed so that a part of the loaded document is exposed to the outside of the flatbed glass; And a scanning roller member driving motor configured to transmit a driving force to the conveying roller member so that the conveying roller member is selectively rotated forward or reversely, the scanning unit dividing and scanning an original exceeding a scan capacity of the scan sensor; And An image processing unit which performs image processing for combining two images scanned by the scanning unit; The feed roller member includes a feed roller provided adjacent to the document feeder, and a feed roller installed adjacent to the document exposure port, The feed roller is rotated forward or reverse by the feed roller member driving motor so that the fed document is fed to the document exposure port or the document discharge port side, The scanning unit includes: a document scanning button for outputting a signal to scan a document loaded in the document feeder; A control unit which receives a signal from the original scan button and outputs a signal to operate the scan sensor and the feed roller member driving motor; And a document size detection sensor installed at the document inlet to detect the size of the document to be inserted. The control unit outputs a signal to the scan sensor and the feed roller member driving motor according to an operation signal of the document scan button and a detection result of the document size detection sensor, so that the document adhered to the flatbed glass may be selectively scanned. , And the scanning sensor scans each of the half or more of the originals so that the divided scans of the two images are overlapped with each other when the divided scans of the originals occur. delete delete delete delete a) aligning the short side of the document with the document feeder; b) clicking the scan original button; c) a control unit outputs a signal to a feed roller member driving motor according to the signal of the original scan button so that a part of the original aligned with the document feeder is brought into close contact with the platen glass; d) a control unit outputting a signal to a scan sensor such that a portion of the document adhered to the flat glass is scanned; e) a control unit outputting a signal to a feed roller member driving motor such that the remaining portion of the unscanned original adheres to the flat glass; f) a control unit outputting a signal to the scan sensor such that the remaining portion of the original is scanned; And g) an image processing unit performing image processing of merging two images scanned by the scan sensor; and the scanning method of the A4 scanner having the A3 paper scanning function according to claim 1. The method of claim 6, Between the step b and the step c, further comprising the step of sensing the size of the document aligned on the flat glass through the document size sensor, The controller performs the steps c, d, e, f, and g when the document aligned on the platen glass is larger than the scan capacity of the scan sensor as a result of the detection of the document size detection sensor. How to scan A4 scanner with scan function. The method of claim 7, wherein And the scan sensor scans each of at least half of the original so that two divided scan images overlap each other.

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