JPS6158752A - Enlarged printing system - Google Patents

Abstract

PURPOSE:Not to generate the discontinuity of picture, by a method wherein the dot at the last stage of the first line when, in an enlarged manner, printed ranging over two lines vertically, is shifted so that it forms the dot at the top stage of plural designated dots after changing the line. CONSTITUTION:The first line corresponding to the upper half part of enlarged printing is printed from the first dot to the 24th dot as they are. When the second line corresponding to the lower half part of enlarged printing is printed, the dots are shifted and the 24th dot to the 47th dot are doubly printed in a manner of two times printing of the 24th dot. The 48th dot is made to be zero.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to an enlarged printing method when printing is enlarged in the vertical direction using a dot matrix printer, and a printing method that improves the printing mode after a line break in the frame. It is something.

(2) Prior Art When printing characters with a dot matrix printer, the printer prints using its own recording dot width. In principle, dot pins are arranged vertically in a vector character generator (C
G) drives dots corresponding to the pattern of printed character symbols, and at the same time moves the print head left and right to perform printing. This print pattern is designated as an address by software. FIG. 4 shows the printing state when the printing pattern is 24 dots. There are various printing methods, and for example, 24 dots may be output in 8×3 format, but for convenience of explanation, a method in which printing is performed in blocks of 24 dots at a time will be described here. Now, the fourth
The case where the pattern shown in the figure is enlarged twice in the vertical direction and printed as shown in FIG. 5 will be explained. Since a 24-dot block is enlarged and printed over two lines, the enlarged character image will be printed in a 48-dot space.

In this case, the enlargement method is done by typing the same image information twice depending on the software settings, and this is
1 to A24, it occupies 48 dots.

This procedure is shown as an example in FIG.

Conventionally, enlarged printing is performed using the method described above, in which the 24-dot rows from 1 to 24 in the first horizontal row are first printed, and then the paper feed amount in the sub-operation direction is adjusted at the time of line feed. , and below that, the next 24 dots from 25 to 48 are printed.

(3) Problems to be solved by the invention However, in the conventional printing method as described above, if the line feed accuracy of the printer is good, there is no problem because the continuity of the upper and lower images matches. If the line feed accuracy is low, a gap d will be created between the upper line and the lower line due to line feed variations, resulting in a discontinuous image as shown in Figure 7 as a result of enlarged printing, reducing the image quality. There was a possibility that this would occur frequently.

(4) Purpose of the Invention The present invention has been made by paying attention to such conventional problems, and its purpose is to prevent line breaks between the upper and lower halves due to line feed variations in enlarged printing. It is an object of the present invention to provide a printing method that does not cause continuity.

(5) Means for Solving the Problem In order to achieve the above-mentioned object, the present invention provides a printer that performs printing using a dot matrix method, in which two dots are printed in the vertical direction.
When printing enlarged across a line, the specified dot is shifted so that the last dot of the multiple dots specified as the first line becomes the top dot of the multiple specified dots after the line break, and the above dots are recorded repeatedly. The gist of this invention is to enable printing that fills the printing gaps caused by variations in line feeds by printing.

(6) Effect With the above configuration, for example, when printing a printing pattern with 24 dots, firstly, when printing the upper half of the enlarged print, 1 to 24 dots are printed as the first line,
Next, when embossing the second line, shift the printing dots from the 24th dot to the 47th dot. The lower dots are printed twice. In this case, if the line feed F# degree of the printer is perfect, the bottom dot will be hit twice as a result, and a phenomenon will occur in which that part is more) than other parts. On the other hand, if the printer's line feed precision varies and a gap is created between the top line and bottom line due to the line feed, the above-mentioned duplicate printed dots will be placed in this gap, and this The gap is filled. As a result, no gap is created between the upper half line and the lower half line during enlarged printing, and the printed characters are not deformed between the upper and lower lines.

(7) Examples One embodiment of the invention is illustrated in FIGS. 1-3.

In this embodiment, when synthesizing a character pattern, instead of sequentially printing 24 dots in parallel from the 1st dot to the 48th dot as in the past, enlarged printing is performed. The first line, which is half, is the first
The 24th dot from the 24th dot is printed as is, but when printing the second line, which is the lower half of the enlarged print, the dots are shifted and the 47th dot is printed from the 24th dot.
The 24th dot is printed twice by hitting the 24th dot twice. At this time, the 48th dot is set to 0.

An example of a control device for printing while performing such dot shifting is shown in FIG.

This control device was selected from the character code. The character generator 2 is supplied with the address 1, the vertical enlargement processing section 4 is supplied with the 24-bit dot matrix pattern 3, and the upper half of the vertically enlarged character pattern!
A line selector 8 switches between one or two lines to which the 24-bit pattern 5 or the lower 24-bit pattern 6 is supplied; a shifter 7 shifts dots for the lower 24-bit pattern; A print control section prints the first line or the second line during enlarged printing based on the output from the selection section 8, and a sub-print control section prints the first line or second line during enlarged printing based on the line signal of the first line or second line during enlarged printing. It consists of a step number generating means 10 that determines the number of line feed steps in the operating direction, and a line feed control section 11 that performs line feed control based on the output signal from the step number generating means 10.

In such a control device, the processing on the vertical enlargement member is performed by software, and first, when enlarging printing, 24 pits 5 on the first line are output. Next, when printing the second line during enlarged printing, shift the 24 bits 6 in the lower half along with the bottom line when printing the upper half using the shift member 7, and when printing the lower half, shift the 24th dot 6 to the 24th dot when printing the lower half. to the 47'a dot, and 48
The 24-bit dot is held in the line selection unit 8 so as to be 0, and each 24 bits are output to the print control unit 9 based on the first or second line command in the line selection unit, and a line feed is performed.・Printed.

As a result, the 24th dot is overshot. The command on the first line or the second line in the line selection section is also input to the step number generation section 10, and the step number generation section 1
0, the number of steps is determined to determine the first or second row. Then, the output from this step number generation unit 10 is controlled by line feed control! (The paper is sent to the first copy 11, and the paper is fed in the sub-operation direction when printing the first line or the second line.

In this case, even if there are variations in line break cleanliness and a gap d is created between the first and second lines during enlarged printing, the same dots at the boundary can be printed by shifting the printing dots mentioned above. Since it is typed twice, this second dot is typed into the line feed gap d, and the corresponding line feed gap d
fill in. Moreover, the dot that fills this line break gap d is
Since the dot information is the same as the bottom dot of the first line, the enlarged and printed characters do not lose their shape in this line break gap, and the visually correct characters are enlarged and printed. In other words, if you simply want to shift the 24 bits of dots in the lower half when performing enlarged printing, you can shift the 24 bits from the 25th dot to the 481st dot by 1 bit upwards. Okay, but in this case,
Although it is possible to fill gaps caused by variations in line breaks, the enlarged and printed characters themselves lose their shape in the gap between line breaks.

Thus, according to the present invention, as shown in FIG. 1, enlarged printed characters that do not lose their shape and that neatly fill the gap between line breaks can be obtained.

In addition, when moving to printing new data on a new line after enlarged printing, by starting a line feed request,
The line feed step is changed by the processing and commands of the line feed step number generation unit 10 and the line feed control unit 11, and the same operations as in normal printing are performed. Furthermore, after performing enlarged printing over two lines, it is also possible to perform enlarged printing using a new line, and in this case, the line feed step number generation unit 10 and the line feed control unit are activated by starting a line feed request. The step is changed by the process and command 11, and the same operation as the previous enlarged printing is performed.

(8) As described in detail, according to the present invention, when enlarged printing is performed using the dot matrix method, it is possible to prevent discontinuous blank spaces from occurring at line breaks, thereby preventing the character form from being cut into one line. This has a great effect in making even slight disturbances in printing less noticeable. In addition, regarding the dots at the boundary between the upper half and the lower half when enlarging the print, mb
Due to the stamping, there is a risk of uneven print density, but such density unevenness is not very noticeable, and
Even if the printed characters expand slightly in the vertical direction at the gap between line breaks due to variations in line breaks, the poor image quality due to the discontinuity of the character image is more noticeable compared to this. By adopting the printing method of the invention, it is possible to improve the image quality of an enlarged printing image.

[Brief explanation of drawings]

FIG. 1 shows the bit arrangement when enlarged printing is performed according to the present invention, and the enlarged printed characters that are raised (as shown in FIG.
Fig. 2 is a block diagram showing an example of a control device for carrying out the enlarged printing method of the present invention, and Fig. 3 shows the selection of each line in enlarged printing for enlarging to twice 48 bits in a 24-bit block printing device. Figure 4 is a diagram showing the relationship between bits and printing positions, Figure 4 is a diagram showing the case of printing a normal size character pattern with 24 dots 1 to printing blocks, Figure 5 is a diagram showing the shrinking direction in the printing method shown in Figure 4. Figure 6 is a diagram schematically showing the procedure for enlarging characters when they are enlarged to 48 dots, and Figure 7 is a diagram showing a state in which a line feed is performed using the conventional technique. FIG. 7 is a diagram illustrating line feed gaps during enlarged printing that may occur due to line feed variations. 1... Character data address 2... Character generator 4... Vertical enlargement section 7... Shift section 8... Line operation section 9... Print control section 10... Step number generation section 11 ...Line feed control section Figure 3 ○01 0b1go1
Change Q stitch 1.

Claims (1)

[Claims] In a printer that prints using the dot matrix method, when enlarging printing over two lines in the vertical direction, the bottom dot of the multiple dots specified as the first line is the top dot of the multiple specified dots after the line break. The enlarged printing method is characterized in that the specified dots are shifted so as to form dots, and the dots are recorded and printed overlappingly, thereby making it possible to perform printing that fills printing gaps caused by variations in line feeds.