JP2001158146A - Printing control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lateral shift (banding) in the printed result and to achieve good printing quality. SOLUTION: A printing control device X makes a print head Y2 print by a unit of line along a lateral direction L with respect to a conveying direction F of a paper P. A data developing section 30 develops printing information to the paper P on a bitmap. As the bitmap data developed by the data developing section 30 is scanned by a rasterizing operation section 50, a printing section discriminating section 51 discriminates a non-printing section and a printing section, which are continuous in the conveying direction F of the paper P, with each other. A paper conveying control section 60 controls a paper conveyance amount of the paper P corresponding to the lengths of the non-printing section and printing section. A print head control section 61 controls so as not to divide the printing portion of one printing section into a plurality of lines by partially diving one line of printing operation by the print head Y2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing control apparatus suitable for a dot impact type printer which performs printing in line units.

[0002]

2. Description of the Related Art A dot impact type serial printer performs printing in line units while reciprocating a print head in a horizontal direction (main scanning direction) with respect to a paper feeding direction (sub scanning direction). In addition, as the print head, a print head in which, for example, 24 needle pins corresponding to the number of print dots are staggered in the sub-scanning direction is used.

[0003] In such a dot impact type printer, usually, by setting a fixed character size and a line interval, the paper feed amount corresponds to one line of the print head, that is, the number of print dots. A method of step-feeding a sheet with a constant feed amount corresponding to the number of print dots is adopted. When the print head moves from the home position along the main scanning direction to the return position, the print head prints dot matrix characters on paper by hitting a needle pin on an ink ribbon, etc., and then moves from the return position to the home position. The printing operation is performed in units of a line by repeating the operation of returning to the above state. Recently, there is also a printer which performs a printing operation even when the print head returns from the return position to the home position, thereby enabling high-speed printing of two lines in one reciprocation.

[0004]

However, according to the operation of the printer described above, for example, when printing a character as a simple image, a section (printing section) to be continuously printed in the sub-scanning direction and a space between lines are required. Regardless of the corresponding non-printing section (non-printing section), since the paper feed amount of the paper is constant, a laterally shifted state as shown in FIG. Banding can be seen in which a visual line is visible.

[0005] Such banding is caused by the print head H
This is because the home position (not shown) does not exactly match each time the printer reciprocates, which is a common problem not only with a dot impact type printer but also with a serial printer that performs printing in line units. In the banding shown in FIG. 8, the print head H starts the printing operation slightly before the home position in the (n + 1) th line, and as a result,
It can be seen that the state is shifted laterally by the amount of dots.

Further, in the case where high-speed printing for two lines is made possible by one reciprocating movement of the print head H, since the printing start position is reversed between adjacent lines, lateral displacement is particularly likely to occur. For example, as shown by an arrow in the parenthesis in FIG. 8, when the print head H on the (n + 1) th line moves in the direction (return direction) opposite to the previous moving direction (forward direction) on the nth line, the same figure as above is applied. As a result, a lateral shift as shown in (1) occurred, and a satisfactory result as print quality could not be obtained.

In view of the above, the present invention has been made under the above circumstances, and provides a print control apparatus capable of preventing lateral displacement (banding) in a print result and achieving good-looking print quality. The task is to provide.

[0008]

DISCLOSURE OF THE INVENTION In order to solve the above problems, the present invention employs the following technical means.

That is, a printing control device provided by the present invention is a printing control device that causes a printing head to perform a printing operation in units of rows along a horizontal direction with respect to a paper feeding direction of a paper. By scanning the bitmap data expanded by the data expansion unit and the data expansion unit that expands the information on the bitmap,
While distinguishing between a non-printing section and a printing section that are continuous in the paper feeding direction of the paper, a printing section identifying means for recognizing these section lengths, and a non-printing section and a printing section obtained by the printing section identifying means. The paper feed amount of the paper is variably controlled in accordance with the section length of the paper, and the printing operation for one line by the print head is partially performed so that the printing corresponding to one printing section is not divided over a plurality of lines. And paper feed print control means for controlling while cutting the image.

According to the printing control apparatus provided by the present invention in which the above technical means are employed, a printing section in which printing is to be continuously performed along the paper feeding direction (sub-scanning direction), A non-printing section where printing is not performed continuously in the scanning direction is recognized. The printing in a printing section in which printing can be performed in one line is performed by variably controlling the paper feed amount of the paper so that the printing operation for one line of the print head moving in the horizontal direction (main scanning direction) of the paper is performed. In this case, printing in the printing section of the next line is not performed at the same time. That is, the paper feed amount of the paper is adjusted so that the entire printing section to be continuously printed is completely contained within the printing width of one line by the printing head, and the extra non-printing section is thinned out. Then, the printing operation by the print head is performed for each printing section. Therefore, even in an operation state in which the print head is displaced line by line, as long as the print section is within the print width of the print head, it is possible to prevent banding without causing a lateral shift in the print result. This makes it possible to obtain good-looking print quality when characters are printed as images.

As a preferred embodiment of the present invention,
The paper feed print control means, when there is an arbitrary number of print sections that fall within the print width of the print head, completes printing of all these print sections only by one line printing operation by the print head. can do.

According to such a configuration, when there are a plurality of printing sections which fall within the printing width of the printing head, the character lines and the like in all of these printing sections are limited to one line without printing by two or more lines. Since printing is performed collectively, the appearance can be improved without causing a lateral shift in the printing result even in such a character line including a plurality of lines.

[0013] In another preferred embodiment of the present invention, the paper feed print control means is provided when the part of one of the plurality of print sections is out of the print width of the print head. It is possible to adopt a configuration in which printing in one printing section is started at the present time by the printing operation of the next line by the printing head.

According to such a configuration, when there is one printing section which partially protrudes from the printing width of the print head, the character lines and the like in this printing section are divided into parts and printed in two or more lines. Therefore, even if there is a character line partially protruding from such a printing width, printing can be carried over to the next line and printing can be performed as long as the character line falls within the printing width of the print head. The appearance can be improved without lateral displacement occurring in the result.

In another preferred embodiment of the present invention, the paper feed print control means, when there is one print section that cannot be accommodated within the print width of the print head, performs printing in this print section. The print head may repeat the printing operation for a plurality of lines to complete the printing operation.

According to such a configuration, when there is one printing section which cannot be accommodated within the printing width of the printing head, the printing width of the printing head matches the printing width of the character line in such a printing section. While performing the paper feed operation of one line unit
The printing operation can be performed by the print head for each line to complete the entire printing.

Further, as another preferred embodiment of the present invention, the paper feed print control means is arranged so that an upper end of a print line by the print head coincides with a boundary line changing from a non-printing section to a printing section. Alternatively, the print head may perform a printing operation while feeding the paper.

According to such a configuration, the paper is fed on the basis of the upper end of the print line by the print head, so that the paper feed amount can be easily determined when feeding the paper, and one paper feed can be performed. It is possible to prevent lateral displacement such that the print result for the print section is divided and printed as much as possible, and as a result, it is possible to improve the print quality over the entire paper.

Further, as another preferred embodiment of the present invention, the print head is movable in a lateral direction with respect to a paper feed direction of the paper, and the paper feed print control means is provided with the print head. Each time is reciprocated, the printing operation for two lines in both the forward path and the return path can be completed.

According to such a configuration, high-speed printing of two lines is performed by one reciprocating movement of the print head, and the appearance of the printed result of each line can be kept beautiful without any lateral displacement. it can.

In another preferred embodiment of the present invention, the print head performs a dot impact type printing operation, and further performs a color printing type printing operation. it can.

According to such a configuration, the above-described excellent effects can be obtained in a dot impact type monochrome printer or color printer. In addition, the present invention,
It has the optimal configuration for printing characters as images using a dot impact printer.However, the printer is not limited to this type of printing, but is a serial printing printer that requires banding countermeasures, such as an inkjet printer or thermal transfer printer. It can also be applied to a printer of the system.

Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a block diagram functionally showing an embodiment of a printing apparatus provided with a printing control apparatus according to the present invention. The printing device A shown in FIG. 1 is controlled in its entire operation by a printing control device X. In addition to the printing control device X, the printing device A feeds a sheet P in a predetermined paper feeding direction (the sub-scanning direction indicated by symbol F). ) Is provided with a paper feed mechanism Y1 for feeding paper via a stepping motor or the like, a print head Y2 for performing a printing operation while reciprocating in a lateral direction (main scanning direction indicated by a symbol L) with respect to the paper feed direction, and the like. . As the print head Y2, for example, a staggered arrangement of 24 needle pins in the sub-scanning direction Y1 is used, and printing is performed on a sheet by a dot impact printing method. The printing apparatus A is connected to an information processing apparatus B such as a computer via the interface 10 as an example, and performs a predetermined operation according to a print queue from the information processing apparatus B.

The print control device X includes a CPU, ROM, RA
M, and a microcomputer mainly composed of a gate array and the like, and functionally includes an interface 10, a data classification unit 20, a code data processing unit 21, an image data processing unit 22, a data development unit 30, A printer memory 40, a rasterization processing unit 50,
It is divided into a print section identification section 51, a paper feed control section 60, a print head control section 61, and the like.

The interface 10 is for exchanging data with an external information processing apparatus B or the like. The data classification unit 20 is for determining whether print information sent from the information processing apparatus B or the like is code data defined by character codes or the like or image data defined in dot units. is there. The code data processing unit 21 is for preparing a character code or the like into data for printing. When printing is performed through the code data processing unit 21, the same operation procedure as that of the related art may be used, or the operation procedure of the present invention described later may be used. Instead, the operation procedure may be directly performed via the printer memory 40 or the like. The image data processing unit 22 includes:
This is for preparing image data sent from the information processing apparatus B or the like into data for printing. When printing is performed via the image data processing unit 22,
The operation procedure of the present invention described later is applied.

The data developing section 30 is for developing printing data for the paper P on a bit map via the printer memory 40. The printer memory 40
It functions as a print buffer at the time of a printing operation and is used as a work space for storing the bitmap data expanded by the data expanding unit 30 and the printing section management table 41. Rasterization processing unit 5
0 is for scanning the bitmap data along a direction corresponding to the main scanning direction L, for example. The printing section identification unit 51 distinguishes a non-printing section in which printing is not continuously performed in the sub-scanning direction from a printing section in which printing is to be performed, based on the result obtained by the scanning of the rasterization processing unit 50, and those sections. The length is calculated based on the coordinates in dot units. The coordinate data of the non-printing section and the printing section obtained by the printing section identification section 51 are stored in the printing section management table 41. The print section management table 41 will be described in detail in the following description of the operation.

The paper feed control section 60 is for controlling the paper feed operation of the paper feed mechanism Y1 based on the coordinate data on the non-print section and the print section stored in the print section management table 41. As will be described in detail later, according to the paper feed control unit 60, the paper P is fed so that the upper end of the print dot of the print head Y2 coincides with the boundary line that changes from the non-print section to the print section. The print head control unit 61 controls the printing operation by the print head Y2 while cooperating with the paper feed control unit 60. As will be described in detail later, according to the print head controller 61, the print head Y2 can perform a printing operation in units of rows. In other words, simply speaking, by the cooperative operation of the paper feed control unit 60 and the print head control unit 61, printing corresponding to each print section is performed by one line of the print head Y2 while thinning out extra non-print sections. The printing operation is performed so as to be completed as much as possible.

That is, the data developing unit 30 realizes a data developing unit that develops print information for a sheet on a bit map. The rasterizing processing unit 50 and the printing section identification unit 51 scan the bitmap data developed by the data developing unit to distinguish between a non-printing section and a printing section that are continuous in the paper feed direction. A print section identification means for recognizing the section length is realized. Paper feed controller 60 and print head controller 6
1 controls the paper feed amount variably according to the section length between the non-printing section and the printing section obtained by the printing section identification means, and divides the printing corresponding to one printing section into a plurality of lines. So that it is not
A paper feed printing control means for controlling the printing operation for the lines while partially separating the printing operation is realized.

In the printing control apparatus X having such a configuration, the operation is performed by the CPU reading and executing the program from a storage medium such as a ROM storing the program corresponding to the operation of each of the above units. Can be realized.

Next, the operation of the printing apparatus having the above configuration will be described with reference to the drawings.

FIG. 2 is a flowchart showing a print processing procedure by the print control device X. Note that the printing process shown in this figure corresponds to the case where the printing information sent from the information processing device B is image data.

First, the data sorting section 20 sends the image data sent together with the print queue from the information processing apparatus B via the interface 10 to the image data processing section 22, and the image data processing section 22 prints the image data from the image data. Data is generated (S1). The print data includes a sheet feed mechanism Y1 and a print head Y described later.
2 is information for controlling.

Next, the data developing unit 30 receives the print data from the image data processing unit 22, and develops the print data on a bit map via the printer memory 40 (S2). The bit map data developed on the bit map includes an X coordinate in the main scanning direction L and a Y coordinate in the sub scanning direction F.
Position information in dot units defined by coordinates,
According to the bitmap data, dots to be printed and dots not to be printed are expressed in a matrix.

When the bitmap data is created, the rasterization processing unit 50 scans the bitmap data for each dot line along the X-axis direction (main scanning direction), and identifies the scanning result as a printing section identification. Send to unit 51 (S
3).

The printing section identification section 51 distinguishes between a non-printing section and a printing section that are continuous in the Y-axis direction (sub-scanning direction) based on the scanning result of the rasterization processing section 50, and recognizes these section lengths ( S4). Here, the non-printing section refers to a section in which dot rows in which printing is not performed at all are continuous along the Y-axis direction coinciding with the paper feeding direction of the paper P, and as an actual printing result for this non-printing section. Means that a blank line space is formed. On the other hand, a printing section is a section in which a dot row to be printed is continuous for at least one dot along the Y-axis direction, and an actual printing result for this printing section is, for example, a horizontal row of characters. Are formed. Information on such a non-printing section and a printing section is stored in the printing section management table 41 with a Y-coordinate of a boundary line that changes from a non-printing section to a printing section or vice versa, While referring to the contents of the print section management table 41, a paper feed control unit 60 described later will be described.
Controls. The detailed contents of the print section management table 41 will be illustrated together with the following description.

As described above, the print section management table 4
When 1 is created, each of the paper feed control unit 60 and the print head control unit 61 actually starts printing on the paper P by controlling the paper feed mechanism Y1 and the print head Y2.

More specifically, first, the paper feed control section 60 determines whether or not a print section to be printed is present in the print section management table 41 (S5).

When there is a print section (S5: YE
S), the paper feed control unit 60 determines that the upper end of the print section, that is, the position corresponding to the boundary line that changes from the non-print section to the print section on the paper P, is the upper end of the print dot (needle pin) of the print head Y2. Paper feed mechanism Y
1 feeds the paper P (S6).

At this time, based on the contents of the print section management table 41, the paper feed control section 60 continuously prints the section length of the print section to be printed, that is, in the paper feed direction (Y-axis direction) of the print section. The print head Y
2, the number of dots corresponding to the print width of one line (for example, 2
(4 dots) or less (S7).

When the dot width of the printing section is equal to or smaller than the printing width of one line by the printing head Y2 (S7: YES), the printing head control unit 61 causes the printing head Y2 to perform the printing operation of one line (S8). Then, the process returns to S5, and a series of operations by the paper feed control unit 60 are repeated.

FIGS. 3 to 6 are schematic diagrams showing an example of a printing result obtained by repeating the processing from S5 to S8 of FIG. 2 twice. In particular, FIG. 3 shows a printing section management table. 41 is also shown. Note that, for convenience, twelve dots forming the image Im are shown arranged in the sub-scanning direction. However, in practice, the image Im is formed by 24 dot rows corresponding to the number of dots of the print head Y2. .

As shown in the print section management table of FIG. 3, the number of dots from the Y coordinate at the upper end of the print section n2, n4 to the Y coordinate at the upper end of the next non-print section n3, n5 is the dot number of the print head Y2. If it is less than the number (24 in this example),
The print head Y2 performs printing corresponding to one horizontal row of each printing section n2, n4 by one printing operation. Therefore, a good-looking print quality can be obtained without causing a state in which the image Im such as a character shown in the print result is laterally shifted, that is, so-called banding does not occur.

The printing result shown in FIG. 4 indicates that when the print head Y2 reciprocates in the main scanning direction Y by high-speed printing, a printing operation for two lines in both the forward path and the return path in one reciprocation. Is obtained by completing the above. When such high-speed printing is performed, a shift is likely to occur in each line due to the positional accuracy of the print head Y2, but even in such a case, the print sections n2 and n4 fall within the print width of one line of the print head Y2. As long as the image I
There is no lateral displacement of m.

On the other hand, in FIG. 5, each of the print sections n2 and n of 18 dots which fall within the print width of one line of the print head Y2.
4 shows the printing result by one printing operation, but the printing head Y is changed according to the preceding printing section n2.
2 performs a printing operation, as shown by hatching in the figure, an overlapping portion occurs due to the proximity of the printing section n4 of the next line. In such a case,
As long as the print sections n2 and n4 fall within the print width of one line of the print head Y2, the print operation of the portion corresponding to the next print section n4 is not performed during the print operation for the previous print section n2. After the printing section n2 is completed and the printing is completed, the same printing operation is performed by aligning the upper end of the printing dot of the printing head Y2 with the upper end Y coordinate (32 in this example) of the next printing section n4. Is repeated. Therefore, an image I such as a character line corresponding to the printing sections n2 and n4 adjacent to each other across the non-printing section n3 is obtained.
Even with m, it is possible to prevent the state where each character line is shifted laterally as much as possible, and to obtain good-looking print quality.

Further, in FIG. 6, a print section of two lines that falls within the print width of one line of the print head Y2 is regarded as one print section n2, n4. A print result equivalent to a minute is obtained. Even in such a case, an image Im such as two lines of characters shown in the print result does not shift laterally, and a good-looking print quality can be obtained even when characters smaller than the print head are reduced in size.

Referring again to FIG. 2, when the dot width of the printing section does not fall below the printing width of the printing head Y2 (S7: NO), the printing head control unit 61 controls the printing head Y2 similarly to S8. Performs a printing operation for one line (S9), and then the paper feed control unit 60
The paper P is fed by a paper feed amount (for 24 dots) corresponding to one row of No. 2 (S10).

Then, based on the contents of the print section management table 41 again, the paper feed control section 60 determines whether or not the remaining width of the print section currently being printed is smaller than the print width of one line of the print head Y2. Is determined (S11).

If the remaining width of the printing section is equal to or smaller than the printing width of one line by the printing head Y2 (S11: YES), the printing head controller 61 sets the printing head Y2 in the same manner as S8 and S9.
Performs a printing operation for one line (S12), and thereafter returns to S5 to repeat a series of operations by the paper feed control unit 60.

On the other hand, if the remaining width of the print section does not fall below the print width of the print head (S11: NO), the paper feed control section 60 and the print head control section 61 return to S9 again and execute processing for the remaining print section. Repeat a series of operations.

FIG. 7 is a schematic diagram showing an example of a printing result obtained by repeating the processing from S9 to S11 of FIG. 2 twice and thereafter repeating the same processing twice. As shown in this figure, when the number of dots from the Y coordinate at the upper end of the print section N2, N4 to the Y coordinate at the upper end of the next non-print section N3, N5 is larger than the number of dots of the print head Y2, that is, the print head When enlarging and printing a character or the like that is larger than the print width of Y2, the print head Y2 moves the print section N2,
In N4, printing corresponding to one horizontal row is performed by the printing operation of the required number of times (two times in this example). Therefore, in the case of enlarging and printing a character or the like larger than a print head, the effect of the present invention as described above cannot be expected. , 1
It is possible to prevent lateral displacement such that one character line is divided and printed as much as possible, and to improve the printing quality over the entire paper.

Further, finally, in S5, when the print section to be printed does not exist in the print section management table 41 (S5: NO), the paper feed control unit 60 discharges the paper P to the paper feed mechanism Y1. (S1)
3), the execution of the program relating to the printing process is terminated.

Therefore, according to the print control apparatus X having the above-described configuration and operation, when the print head Y2 reciprocates along the main scanning direction L, even if the print head Y2 is displaced due to accuracy problems or the like, As long as the print section falls within the print width of the print head Y2, banding can be prevented as much as possible without causing a lateral shift in the print result of characters and the like expressed in a row for each line, and characters are printed as images. In such cases, it is possible to obtain good print quality.

The present invention is not limited to the above embodiment.

For example, the paper feed control unit 60 operates as shown in FIG.
In 6, the paper P is fed so that the upper end position of the print section coincides with the upper end of the print dot of the print head Y2.
If an image such as a character is not divided and printed, the paper may be fed while adjusting the paper feed amount of the paper P so that the print line corresponding to the print section falls within the print width of the print head Y2. . Further, in the flowchart shown in FIG. 2, the comparison is performed based on the print width of the print head Y2 for each print section, but such comparison processing is performed based on the contents of the print section management table 41 created in advance. It may be performed collectively for all the printing sections of the entire paper based on this.

Further, the printing head Y in the printing apparatus A
2 is mainly described as a monochrome dot impact type, but this type of head may be of a color printing type provided with an ink ribbon, and is not limited to the dot impact type, but may be a line unit. The above effects can also be obtained with a print head of an ink jet system or a thermal transfer system that performs printing.

[Brief description of the drawings]

FIG. 1 is a block diagram functionally showing an embodiment of a printing apparatus including a printing control apparatus according to the present invention.

FIG. 2 is a flowchart showing a print processing procedure by a print control device according to the present invention.

FIG. 3 is a schematic diagram showing an example of a printing result obtained by repeating the processes from S5 to S8 of FIG. 2 twice, and a printing section management table corresponding thereto;

FIG. 4 is a schematic diagram showing an example of a printing result obtained by repeating the processing from S5 to S8 of FIG. 2 twice.

FIG. 5 is a schematic diagram showing an example of a print result obtained by repeating the processes from S5 to S8 of FIG. 2 twice.

FIG. 6 is a schematic diagram showing an example of a printing result obtained by repeating the processes from S5 to S8 of FIG. 2 twice.

FIG. 7 is a schematic diagram showing an example of a print result obtained by repeating the processes from S9 to S11 of FIG. 2 twice and thereafter repeating the same process twice.

FIG. 8 is a schematic diagram showing an example of a printing result by a conventional dot impact printer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 interface 20 data classification unit 22 image data processing unit 30 data development unit 40 printer memory 41 print section management table 50 rasterization processing unit 51 print section identification unit 60 paper feed control unit 61 print head control unit A printing device B information processing device X Print control device Y1 Paper feed mechanism Y2 Print head P Paper F Paper feed direction (sub scanning direction) L Print head moving direction (main scanning direction)

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazuhiro Hosoya No. 35, Saho, Kato-gun, Hyogo Prefecture Fujitsu Peripheral Machinery F-term (reference) 2C058 AB17 AC04 AC06 AC07 AC14 GA03 2C480 CA02 CA16 EA15

Claims (8)

[Claims] 1. A printing control device for causing a print head to perform a printing operation in units of rows along a horizontal direction with respect to a paper feeding direction of a paper, wherein the data developing means develops printing information for the paper on a bit map. By scanning the bitmap data developed by the data developing means, a non-printing section and a printing section which are continuous in the paper feed direction of the paper are distinguished, and a printing section identification for recognizing these section lengths is performed. Means for variably controlling the paper feed amount of the paper according to the section length between the non-printing section and the printing section obtained by the printing section identification means, and printing a plurality of lines corresponding to one printing section. Paper feed printing control means for controlling the printing operation of one line by the printing head while partially cutting the printing operation so that the printing operation is not divided. Shaped controller. 2. The printing device according to claim 1, wherein the paper feed print control means includes an arbitrary number of print sections that fall within the print width of the print head.
The printing of all of these printing sections is performed by
2. The printing control device according to claim 1, wherein the printing is completed only by a printing operation for a line. 3. The printing device according to claim 1, wherein when a part of one of the plurality of printing sections is out of the printing width of the printing head, printing of the one printing section is performed at the present time. 3. The method according to claim 1, wherein the printing operation is started by a printing operation of a next line by the printing head.
3. The printing control device according to claim 1. 4. The printing apparatus according to claim 1, wherein, when there is one printing section which cannot be accommodated within the printing width of the printing head, the printing operation of the printing section is repeated by the printing head for a plurality of lines. Claim 1
The print control device according to claim 3. 5. The paper feeding and printing control means controls the printing head while feeding the paper so that the upper end of a printing line by the printing head coincides with a boundary line that changes from a non-printing section to a printing section. The print control device according to claim 1, wherein the print control device performs a print operation. 6. The print head is movable in a lateral direction with respect to a paper feed direction of the paper, and the paper feed print control means performs forward and backward bidirectional movement each time the print head reciprocates. The printing control device according to claim 1, wherein the printing operation for two lines is completed by the following. 7. The printing head according to claim 1, wherein the printing head performs a dot impact type printing operation.
The print control device according to any one of the above. 8. The print control device according to claim 7, wherein said print head performs a printing operation of a color printing method.