JPS6372558A - Printing control method - Google Patents

Abstract

PURPOSE:To enhance printing quality without making a head structure complicated, by moving a printing means and printing paper relatively in minute quantity after the finish of the first printing to print the same data as that at the time of the first scanning. CONSTITUTION:When a command designating high density printing is outputted from a host computer through an interface circuit 10, a microcomputer 3 confirms the command and a pattern of usual density is printed by the scanning of one line of a printing head. Thereafter, a pulse motor 6 is rotated, for example, by the quantity corresponding to paper feed 1/3 the dot interval in a vertical direction. Since paper has inertia, said paper inevitably moves by about 1.5/216 inch. Thereafter, when the same data as that in the above mentioned scanning is printed, printing density increases and, therefore, the emphasized form of a character is obtained and, when data is reversed between the first and second times to perform reciprocating printing, an increase in a printing speed can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing control method for a serial dot printer.

More specifically, the present invention relates to a printing control method for high-density printing when forming character patterns and the like in a dot matrix format.

[Traditional technique (nei)]

Conventionally, in order to improve print quality, a print head for a serial dot printer is equipped with 13 or more needles and is angled at a certain angle from the horizontal direction. This will be explained in detail using FIG.

The print head 1 is at an angle θ with respect to the print head feeding direction 2.
It is arranged so that it has Dot D is printed by needle N, and dot D is printed by needle N2.
t is printed, and a dot Di is printed by the needle Ni. Here, the distance between the dot centers lii! IP is the distance W1 [R between the needle centers and the positive arc sin θ of the angle θ (≦
1).

[Problem that the invention seeks to solve]

As described above, the conventional serial dot printer is characterized by improving printing quality by selecting the distance R between the needle centers, the angle θ, and the number of needles l, but on the other hand, the print head It has the disadvantage of a complicated structure. Further, a control circuit is required to correct the printing timing of each needle with respect to the head feeding direction.

The present invention eliminates such drawbacks, and an object of the present invention is to improve the print head structure. J [The aim is to improve the printing quality of printers without making them sloppy.

[Means for solving problems]

The present invention provides a printing control method for forming characters/patterns by filling in the spaces between dots. The present invention is characterized in that at least one of the printing paper and the printing paper is moved by a small amount relatively, and then the printing means prints the same data as in the first scanning at least once.

[For production]

In the present invention, after the printing means performs the eleventh scan, at least one of the paper and the printing means is moved relatively, and in the subsequent scanning of the printing means, the first scanning Print the same data at least once at each time.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 2, 3, and 4. FIG. 2 is a schematic diagram showing the configuration of a serial dot printer that controls printing using a microcomputer. FIG. 3 shows an example in which N is printed in a 5×7 dot print pattern, and FIG. 4 shows an example in which N is printed by the serial dot printer of the present invention.

In the figure, 3 is a microcomputer, 4 is an interface circuit between the microcomputer 3 and the pulse motor drive circuit 5, 7 is a gear structure that transmits the power of the pulse motor 6 to the paper feed l1t48, and 9 is a printing paper. be. The paper feed for 1 dot I minute is composed of, for example, 3 or more pulses input to the pulse motor 6.
is an interface circuit between a host computer (not shown) and the microcomputer 3. The print shown in FIG. 4 is obtained by double striking the print shown in FIG. 3 with one pulse of paper feed in between. After completing printing of the first line, the microcomputer 3 sends a command for l-pulse paper feed to the pulse motor drive circuit 5 via the interface circuit 4, and the paper is fed by one pulse. Then, a second printing is performed to obtain the printing pattern shown in FIG.

The operation will be explained in more detail below.

First, when a command instructing high-density printing is sent from a host computer (not shown) via the interface circuit 10, the microcomputer 3 confirms the command and enters the high-density printing mode shown below. .

In this case, first, as shown in FIG. 3, a pattern with the same density as in the normal printing mode is printed by scanning one line with a printing head (not shown).

Now, at ε, the distance between the dots in the vertical direction of the dot pattern shown in FIG. 3 is assumed to be 1/72 inch. Then, after one line of scanning is completed, the pulse motor 6 is rotated by an amount corresponding to, for example, 1/216 inch paper feed. At this time, since the paper has inertia, it does not move exactly 17216 inches, but moves about 1.5/216 inches.

After the paper is fed, the same data as in the scanning is printed again, and the result shown in FIG. 4 is obtained.

As is clear from FIG. 4, the density of the print increases, resulting in an emphasized font. In this case, as mentioned earlier, the actual paper feed amount is 1.5/216 inches, so
The second dot can be printed exactly at the midpoint of the vertical dot interval printed by the first scan.

Also, °the first printing direction and the second printing direction are
They may be the same or different.

When printing is performed twice by moving the print head twice in the same direction, there is no difference in printing timing, and printing without vertical deviation can be achieved.

When printing is performed twice by reciprocating printing, the reading order of print data is reversed between the first and second printing. Furthermore, by reciprocating printing, it is possible to increase the printing speed.

In addition, for complex kanji that require many dots to form the - character, prepare a high-density dot pattern in advance, as shown in Figure 4, and use the same dot pattern. Apart from the data double-strike mode, 1.
It is also possible to provide a mode in which different data is printed twice and a single character pattern is completed in two prints.

Further, in the above embodiment, the paper was fed by 1/216 inch, but the print head may be moved in the vertical direction without moving the paper.

Even in this case, consideration must be given to inertia in the movement of the print head, and it is conceivable to use a pulse motor or the like to move the print head.

Alternatively, both print heads A may be moved.

In this case, a small amount of movement can be achieved.

Also, in the above embodiment, printing was performed at the midpoint between the first vertical dots, but it is also possible to print at 1/3 of the point and complete one character in three scans. . In this case as well, it goes without saying that the amount of relative movement should be determined in consideration of the inertia of the paper, and in this case, even higher density printing results can be obtained.

Also, in this case, if the number of vertical divisions is very large, the dots will almost always be printed overlapping each other, and therefore the density of the print can be increased, Differentiating it from other characters is also a good thing, and it becomes possible to make an emphatic expression.

Further, although the above example describes an increase in the density in the vertical direction, it is also possible to increase the density in the horizontal direction in a similar manner.

In other words, after one scan of the print head is completed, the paper is moved by a small amount in the horizontal direction, taking into account inertia.
After the first scan of the print head is completed, it is conceivable to shift the home position of the print head by a small amount in the lateral direction, taking into account the inertia of head movement. Alternatively, vertical and horizontal density increases may be combined.

Furthermore, the present invention is applicable to all printers that form characters and patterns using dots. That is, it can be applied to impact dot printers, inkjet printers, thermal printers, etc.

〔Effect of the invention〕

As explained above, in the present invention, the printing means is one
After the first scan, the paper and printing means are moved slightly relative to each other, and then the same data as in the first scan is printed at least once, so a finer density pattern can be created using the same font. It can be printed and the memory capacity required for fonts can be significantly reduced.

In addition, by adjusting the minute feed amount, the density can be freely controlled, patterns with various densities can be created from a single font pattern, the character quality that can be used increases, and the usability for the user is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional example, and FIG. 2 is a diagram showing a configuration for applying the printing control method of the present invention. FIGS. 3 and 4 are diagrams showing patterns printed according to the present invention. Agent: Patent Attorney Mogami - Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a printing control method in which characters/patterns are formed by filling in the spaces between dots, after the printing means performs the first scan to print one line and finishes printing, the printing means and the printing paper are connected to each other. A printing control method characterized in that at least one of them is moved by a small amount relatively, and then the printing means prints the same data as in the first scanning at least once.