Abstract:
An image forming apparatus that forms plural copies of images on a recording medium having divided areas N (&gt; 1 ) by arranging the images on the divided areas, respectively, includes: an input image data acquisition unit that acquires an input image data for one copy; an output image data generation unit that performs a first generation process to generate an output image data in which the images are consecutively arranged on the divided areas, respectively, without a blank divided area for the plural copies by employing the input image data for one copy acquired by the input image data acquisition unit repeatedly by a number of times corresponding to the plurality of copies; and an image forming unit that forms an image on the recording medium based on the output image data generated by the first generation process.

Description:
CROSS REFERENCE TO RELATED APPLICATION  
       [0001]     This application claims priority from Japanese Patent Application No. 2005-156836, filed May 30, 2005, the contents of which are hereby incorporated by reference into the present application.  
       TECHNICAL FIELD  
       [0002]     Aspects of the present invention relate to an image forming apparatus for forming plural copies of an image from input image data, using a so-called N-in-one function.  
       BACKGROUND  
       [0003]     JP-A-9-123562 discloses an image forming apparatus having a so-called N-up or N-in-one function for printing by arranging input images on divided areas respectively on a sheet that is divided into N (&gt; 1 ).  
         [0004]     In the conventional image forming apparatus, when plural copies of the image are printed, using the N-in-one function, the following problem may occur. When five copies of the images are printed in 4 in 1, based on input image data including three total pages in total. The conventional image forming apparatus generates output image data in such a way that, after the images from first page to third page for the first copy are arranged in divided areas on the first sheet, a form or page break is used, regardless of whether or not a blank divided area arises on the first sheet. Then, the images from first page to third page for the second copy are arranged in the divided areas on the next sheet. Accordingly, the images A, B and C from first page to third page are arranged and printed, whereby a total of five sheets with one blank divided area are printed, as shown in  FIG. 10 . This phenomenon is problematic when the printed sheet is cut into four for use (e.g., a slip or check table printed in 4-in-one) because a waste sheet is contained in the sheets after cutting.  
         [0005]     There is a method for avoiding this problem in the case where the image forming apparatus receives an input image data from a terminal unit. That is the input image data in which five copies of the three pages of images are arranged consecutively by copying and pasting the data of three pages repeatedly four times in an application software produced at the terminal unit. Then, the image data is transmitted to the image forming apparatus. However, this operation is troublesome. On the other hand, in the case where the input image data is acquired by reading a document through a scanner, the above method cannot be employed, and five sheets are consumed.  
         [0006]     Also, in the case where the input image data is acquired by reading the document on the scanner, when a plurality of same document images are printed in 4 in 1 in the conventional image forming apparatus, it is required to read the same document on the scanner, whereby the workability was low.  
         [0007]     Aspects of this invention provide an image forming apparatus that can solve the problem with a so-called N-in-one function.  
       SUMMARY  
       [0008]     According to an aspect of the present invention, an image forming apparatus that forms plural copies of images on a recording medium having divided areas N (&gt; 1 ) by arranging the images on the divided areas, respectively, includes: an input image data acquisition unit that acquires an input image data for one copy; an output image data generation unit that performs a first generation process to generate an output image data in which the images are consecutively arranged on the divided areas, respectively, without a blank divided area for the plurality of copies by employing the input image data for one copy acquired by the input image data acquisition unit repeatedly by a number of times corresponding to the plurality of copies; and an image forming unit that forms an image on the recording medium based on the output image data generated by the first generation process.  
         [0009]     The “image forming apparatus” may be not only a printing apparatus such as a printer (e.g., a laser printer) but also a facsimile apparatus or a composite machine having the printer function and the scanner function.  
         [0010]     The “recording medium” is not limited to the paper medium such as sheet, but may be a plastic printing medium such as an OHP sheet.  
         [0011]     The “input image data” may be the original image data read by document reading unit or the image data received from the terminal unit that can make the data communication through the communication line.  
         [0012]     According to another aspect of the present invention, an image forming apparatus that forms images on a recording medium having divided areas N (&gt; 1 ) by arranging the images on the divided areas, respectively, includes: an input image data acquisition unit that acquires an input image data; a reduction ratio information acquisition unit that acquires reduction ratio information of the image on the recording medium; a division number decision unit that determines a division number N based on a reduction ratio acquired by the reduction ratio information acquisition unit; an output image data generation unit that generates the output image data in which the plurality of images for page by page are consecutively arranged on the divided areas, respectively, without a blank divided area based on the input image data acquired by the input image data acquisition unit; and an image forming unit that forms an image on the recording medium based on the output image data generated by the output image data generation unit.  
         [0013]     According to yet another aspect of the present invention, an image forming apparatus that forms images on a recording medium having divided areas N (&gt; 1 ) by arranging a plurality of document images on the divided areas, respectively, includes: a document reading unit that reads the document image; a specification unit that specifies a same image forming number to form the same document image on one recording medium; an output image data generation unit that generates an output image data in which the same document is arranged by the same image forming number specified by the specification unit on a recording medium, employs a document image data read by the document reading unit repeatedly by a number of times corresponding to the plurality of document images; and an image forming unit that forms an image on the recording medium based on the output image data generated by the output image data generation unit. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]      FIG. 1  is a block diagram showing a printing system  1  according to an aspect of the present invention;  
         [0015]      FIG. 2  is a flowchart showing an N-in-one printing process;  
         [0016]      FIG. 3  is a flowchart showing a page-by-page process;  
         [0017]      FIG. 4  is a flowchart showing a document scanner process;  
         [0018]      FIG. 5  is a schematical view showing printed results in the page-by-page process;  
         [0019]      FIG. 6  is a flowchart showing a copy-by-copy process;  
         [0020]      FIG. 7  is a schematical view showing printed results in the copy-by-copy process;  
         [0021]      FIG. 8  is a flowchart showing a normal printing process;  
         [0022]      FIG. 9  is a schematical view showing printed results in the normal printing process; and  
         [0023]      FIG. 10  is a schematical view showing the printed results in the normal printing process (without assigning arrangement of a plurality of same documents). 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0024]     Referring to FIGS.  1  to  10 , one aspect of the present invention will be described below.  
         [0025]     1. Configuration of This Aspect  
         [0026]      FIG. 1  is a block diagram showing a printing system  1  according to this aspect. The printing system  1  has a personal computer  10  as a terminal unit and a laser printer (hereinafter referred to as a “printer  20 ”) which are connected via network interfaces  17 ,  27  to the Internet  18 , to communicate with each other. The printer  20  receives and prints the input image data transmitted from the personal computer  10 . Also, the printer  20  includes a scanner portion  26  and prints the input image data of a document image read by the scanner portion  26 , as will be described later.  
         [0027]     (1) Personal Computer  
         [0028]     The personal computer  10  includes an operation portion  11  (such as a keyboard or a mouse) that accepts an input operation from outside, a display portion  12  for displaying an image, a ROM  13 , a RAM  14 , a CPU  15 , a hard disk  16 , and a network interface  17 . The hard disk  16  stores an application software for creating information to be printed, and a printer driver. The CPU  15  activates the application software and printer driver, which are read from the hard disk  16 , based on a start command from the operation portion  11 .  
         [0029]     Upon receiving a print request command from the operation portion  11  by an input operation of the user, the input image data created by the application software is transferred to the printer driver. The input image data is expanded (converted) into PDL data, and transmitted via the network interface  17 .  
         [0030]     (2) Printer  
         [0031]     The software of the printer  20  is shown in  FIG. 1  in a simplified manner. The printer  20  includes an operation portion  21  for receiving input operations, a printing portion  22  for controlling printing on the sheet, a ROM  23 , a RAM  24 , a CPU  25 , a scanner portion  26 , and a network interface  27 . The operation portion  21  is capable of assigning the following items:  
         [0032]     a) N-in-one printing,  
         [0033]     b) Division number “N” in the N-in-one printing,  
         [0034]     c) Reduction ratio in the N-in-one printing,  
         [0035]     d) Number of copies in the N-in-one printing (hereinafter a assigned copy number K),  
         [0036]     e) Determining normal print mode or consecutive arrangement print mode in the N-in-one printing,  
         [0037]     f) Selecting from the page-by-page printing or the copy-by-copy printing in the consecutive arrangement print mode,  
         [0038]     g) How many times the document is arranged on one sheet (hereinafter same document arrangement number H) in the normal print mode, and  
         [0039]     h) Starting reading the document and ending reading the document in the scanner portion  26 .  
         [0040]     2. N-In-One Printing  
         [0041]     Referring to FIGS.  2  to  9 , the control of the CPU  25  in the N-in-one printing to print by arranging the image (document image) at each page in each area on the sheet divided into N (&gt; 1 ) areas will be described below.  
         [0042]     First of all, reading the document image by the scanner portion  26 , and N-in-one printing based on the input image data of the document image will be described. When the N-in-one printing is assigned in the operation portion  21  of the printer  20 , the CPU  25  performs the control shown in  FIG. 2 .  
         [0043]     A scan reduction ratio/division number N is determined at S 1 . Specifically, when the division number N is specified in the operation portion  21 , the reduction ratio capable of arranging the sheet divided into N areas is automatically determined. On the other hand, when the reduction ratio is specified in the operation portion  21 , the division number N is the maximum number of images scaled down at the specified reduction ratio capable of being arranged within one sheet; or the division numbers N specified beforehand (e.g., 2, 4, . . . ) are prepared, and the division number N is determined to correspond to a reduction ratio closest to the specified reduction ratio.  
         [0044]     Next, the normal print mode is judged at S 2 . If the consecutive arrangement print mode is selected in the operation portion  21  (“N” at S 2 ) , the procedure goes to S 3 , where whether or not the page-by-page process is performed is judged. If the page-by-page process is selected in the operation portion  21  (“Y” at S 3 ), the CPU  25  performs the page-by-page process at S 4  as shown in  FIG. 3 .  
         [0045]     (1) Page-By-Page Process  
         [0046]     Herein, an example of reading the document images of three pages of A image, B image and C image by the scanner portion  26  and performing the 4-in-one printing of three document images for five copies (specified copy number K=5) will be described below.  
         [0047]     If the document of A image is disposed in the reading part of the scanner portion  26 , and a reading start operation is performed only once in the operation portion  21 , the CPU  25  scans a document at S 11  as shown in  FIG. 3 . On scanning the document, the reading of the document of A image starts at the scan reduction ratio determined in the scan reduction ratio/division number N decision process at S 21 , and the following process is consecutively performed by every predetermined number of lines for the document of A image, as shown in  FIG. 4 .  
         [0048]     At S 3 , whether or not the rotation of image is needed is judged. For example, when the 2 in 1 printing is specified where the document of A image is vertically oriented, rotation is needed. Data is rotated by 90 degrees at S 24 , and temporarily stored in a first buffer area kept in the RAM (S 25 ). On the contrary, when the 4-in-one printing is specified as in this invention, rotation is unnecessary, and the data is directly stored in the first buffer area without rotation (S 25 ) This process is performed for all lines in the document of A image (“Y” at S 22 ), and the procedure goes to S 12  of  FIG. 3 .  
         [0049]     At S 12 , it is judged whether or not the document data, namely, the input image data for the document of A image, is processed for the specified number of copies, viz., five copies. If not processed (“N” at S 12 ), the input image data stored in the first buffer area is read at S 13 , and written in a second buffer area kept in the RAM by specifying the arranging positions (print start positions) for arranging the document image of A image in four divided areas on one sheet in a predetermined order. Then, it is judged whether or not a cumulative total number of the arrangement process (S 13 ) is a multiple of the division number 4 at S 14 . If the cumulative total number is the multiple of the division number 4 (“Y” at S 14 ), each divided area on the sheet is fully embedded, in which the printing start position is initialized to the initial printing position at which the image is firstly arranged on the next sheet at S 15 .  
         [0050]     The document of A image in each divided area is consecutively arranged for the specified number of copies, viz., five copies, by repeatedly employing the input image data for the document of A image stored in the first buffer area. The A image is embedded in the four divided areas on the first sheet, and the next page initialization process (S 15 ) is performed, so that one A image is arranged in the divided area on the left side at the upper stage on the second sheet, as shown in  FIG. 5 .  
         [0051]     Then, it is judged whether or not all the documents are scanned at S 16 . In the operation portion  21 , when one document is read, a message to inquire a next document is displayed on the display part of the operation portion  21 . The next document of B, C image is arranged in the reading part of the scanner portion  26 , and each image is read once. If there is no next document, reading the document ends. Thereby, the CPU  25  can judge whether or not all the documents are scanned.  
         [0052]     Since the documents of B, C images are provided in addition to the document of A image, the processing from S 11  to S 15  is performed for the document of B image, whereby three B images are arranged in the remaining three divided areas on the second sheet, and two B images are arranged in the two divided areas at the upper stage on the third sheet, as shown in  FIG. 5 . Further, the processing from S 11  to S 15  is performed for the document of C image, whereby two C images are arranged in the two divided areas at the lower stage on the third sheet, and three C images are consecutively arranged in the three divided areas on the fourth sheet, as shown in  FIG. 5 .  
         [0053]     When all the documents are scanned (“Y” at S 16 ), the output image data written in the second buffer area is read and outputted to the printing portion  22  at S 17 . The printing portion  22  prints once this output image data, four sheets on which five A images followed by five B images, which are followed by five C images, are consecutively arranged without a blank divided area are outputted, as shown in  FIG. 5 .  
         [0054]     (2) Copy-by-Copy Process  
         [0055]     When a copy-by-copy process is selected in the operation portion  21  (“N” at S 3 ), the CPU  25  performs the copy-by-copy process as shown in  FIG. 6  at S 5 . Herein, an example of reading the document images of three pages of A image, B image and C image by the scanner portion  26  and performing the 4-in-one printing of three document images for five copies in the same manner as explained in the page-by-page process will be described below.  
         [0056]     If the document of A image is disposed in the reading part of the scanner portion  26 , and the reading start operation is once performed in the operation portion  21 , the CPU  25  judges whether or not scanning all the documents ends at S 31  of  FIG. 6 . Since the process has started, it is judged that all the documents are not scanned (“N” at S 31 ). The document scanner process, like S 11  of  FIG. 3 , is performed at S 32 , and at S 33 , the input image data of A image stored in the first buffer area is read at S 33 , and written in the second buffer area by specifying the arranging positions (print start positions) for arranging the document image of A image in four divided areas on one sheet in a predetermined order. Then, it is judged at S 34  whether or not a cumulative total number of making the arrangement process (S 33 ) is a multiple of the division number. If the cumulative total number is the multiple of the division number 4 (“Y” at S 34 ), each divided area on the sheet is fully embedded, in which the printing start position is initialized to the initial printing position at which the image is firstly arranged on the next sheet at S 35 .  
         [0057]     Reading the documents of B image and C image starts in the operation portion  21 , and the processing from S 32  to S 35  is performed for the documents of B image and C image. When reading the document ends in the operation portion  21  (“Y” at S 31 ), one A image, one B image and one C image for the first copy are arranged in order in three divided areas on the first sheet, as shown in  FIG. 7 .  
         [0058]     The arrangement process is performed by repeatedly employing each input image data stored in the first buffer area without reading the document in the scanner portion  21 . That is, the next input image data is selected from the input image data of A image, B image and C image stored in the first buffer area at S 36 . Here, the input image data is selected repeatedly four times (specified copy number K-1) in the order of A image, B image and C image.  
         [0059]     The input image data is specified in the order of A image, B image and C image, and the same processing as S 33  to S 35  is performed consecutively for each input image data (S 37  to S 39 ). Subsequent to the A image, B image and C image for the first copy, the A image for the second copy is arranged in the divided area on the right side at the lower stage of the first sheet, and the B image and C image are arranged in two divided areas at the upper stage of the second sheet. In the following, the same processing is repeatedly performed for third, fourth and fifth copies (“Y” at S 40 ), and the output image data written in the second buffer area at S 41  is read and outputted to the printing portion  22 . The printing portion  22  performs one printing operation for this output image data, and four sheets are outputted in which the images for five copies are arranged consecutively in the divided areas in the order of A image, B image and C image without a blank divided area, as shown in  FIG. 7 .  
         [0060]     (3) Normal Printing Process  
         [0061]     If a normal printing process is selected in the operation portion  21  (“Y” at S 2  of  FIG. 2 ), the CPU  25  performs the normal printing process as shown in  FIG. 8  at S 6 . Herein, an instance of reading the document images of three pages of A image, B image and C image by the scanner portion  26 , and performing the 4-in-one printing of three document images for five copies in the same manner without specification of the same document arrangement number H will be described below, as explained in the page-by-page process.  
         [0062]     At S 50 , the document scan process like S 11  of  FIG. 3  is performed for all the document images of A image, B image and C image. When the document is scanned (“Y” at S 51 ), it is judged whether the same document plural arrangement specification is specified in the operation portion  21  at S 52 . If the same document plural arrangement specification is not specified (“N” at S 52 ), the input image data of A image, B image and C image stored in the first buffer area are read, and written in the second buffer area by specifying the arranging positions (print start position) of arranging the A image, B image and C image for one copy in the divided areas on the sheet in a predetermined order at S 53 .  
         [0063]     The output image data for one copy written in the second buffer area is read and outputted to the printing portion  22  at S 54 . In this output image data for one copy, the A image, B image and C image are arranged in the three divided areas on one sheet, and one blank divided area is left, as shown in  FIG. 10 . The printing portion  22  outputs five sheets in which the A image, B image and C image are arranged and printed and one blank divided area is formed by performing the printing operation of the output image data for one copy repeatedly by the specified copy number, viz., five copies, as shown in  FIG. 10 . In the consecutive arrangement print mode, the sheet on which the images are arranged consecutively without a blank divided area is outputted, whereas in the normal print mode, the sheet is outputted by feeding the form for each copy, regardless of a blank divided area.  
         [0064]     When the A image is arranged for a specified copy number of 12 copies with three images on each sheet, for example, it is required that the document of A image is read three times by the scanner portion to make the specified copy number 4 in the conventional printer. However, in this aspect, the same document plural arrangement specification is made in the operation portion  21  without reading the same document of A image three times. When the same document plural arrangement specification is made (“Y” at S 52 ), each print start position for arranging the same A image corresponding to the same document plural arrangement number of three in three divided areas on one sheet is specified and written in the second buffer area at S 55 . The output image data in which three A images written in the second buffer area are arranged is read and outputted to the printing portion  22  at S 54 . In the printing portion  22 , this output image data is repeatedly printed by the number of times obtained from the specified copy number K divided by the same document plural arrangement number H (four times, here). As a result, four sheets on each of which three A images are arranged and printed are outputted, as shown in  FIG. 9 .  
         [0065]     In the case where the N-in-one printing is performed based on input image data sent from the personal computer  10 , a data receiving process is performed, instead of the document scan process at S 11  of  FIG. 3 , S 32  of  FIG. 6  and S 50  of  FIG. 8 . In the printer  20 , when the input image data is received from the personal computer  10 , the input image data is received via the network interface  27 , and temporarily stored in the reception buffer area kept in the RAM  24 . The CPU  25  consecutively processes the input image data stored in the reception buffer area for every predetermined amount of data. Also, the above specification items a) to g) are specified by the personal computer  10 , and its specification information is transmitted together with the input image data to the printer  20 .  
         [0066]     3. Effect of This Aspect  
         [0067]     (1) With this aspect, if the consecutive arrangement print mode is selected, the sheets, in which the image at every page is arranged and printed consecutively in the divided areas on the sheet without a blank divided area for plural copies, can be outputted and printed. Accordingly, the N-in-one printing can be performed by making effective use of the sheet without causing wasteful blank divided area.  
         [0068]     (2) In the case where the image is employed as the slit image by cutting after performing the N-in-one printing, the consecutive arrangement print mode is selected without a blank field on the sheet after cutting, while in the case where the N-in-one printing is performed for the document image includes plural pages, the normal print mode is selected for printing on the sheet by feeding the form for each copy.  
         [0069]     (3) In the consecutive arrangement print mode, the N-in-one printing is performed in various patterns by selecting between the page-by-page printing and the copy-by-copy printing.  
         [0070]     (4) In the normal print mode, if the same document plural arrangement specification is made, the N-in-one printing is implemented by arranging a plurality of same images on one sheet by one reading operation without making the reading operation multiply for the same document.  
         [0071]     (5) Further, if the reduction ratio of the image is specified beforehand, the N-in-one printing is performed by automatically specifying the division number N suitable for the reduction ratio, whereby the convenience is very high.  
         [0072]     &lt;Other Aspects&gt; 
         [0073]     The present invention is not limited to the aspects as described above with reference to the drawings, but the following aspect may be included within a technical scope of the invention, and various changes may be made without departing from the scope or spirit of the invention.  
         [0074]     (1) Though in the above aspects, the images are arranged from the upper stage to the lower stage of the divided areas on one sheet, the images may be arranged from the left side to the right side of the divided areas.  
         [0075]     (2) Though in the above aspects, the arrangement process (S 13 ) is performed in parallel every time each document image is read in the page-by-page process, the arrangement process may be performed after all the documents are first read.