JPS63212558A - Small character printing system for printer - Google Patents

Abstract

PURPOSE:To easily print and output a small character without particularly increasing the memory capacity by logically calculating it by using a dot matrix pattern of an original type. CONSTITUTION:The following calculation is executed for a basic pattern A, and the pattern is sequentially obtained. A pattern that B=A is shifted downward (or upward) by N rows, a pattern that B=B is inverted, a pattern that C=A is shifted upward (or downward) by N rows, D=B+C E=AXD,... (dot pattern to be obtained), where either of B and C may be precedingly executed. This controlling method can reduce the character in a columnar direction on the entirely equal concept. Further, it can simultaneously reduce the character in both column and row directions. The portion having 1 bit of width cannot be reduced less than it.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a fine print method for a printer.

(Prior Art) Usually, a printer has a dot matrix pattern memory (print ROM) in which the character pattern of characters to be printed is stored in advance as a dot matrix lift pattern.

In this type of printer, when character data (simply data specifying characters) is input from an external device, the master control unit
In order to read out the dot matrix pattern for printing corresponding to this character data, a read address is output to the print ROM. This print ROM outputs character patterns to the data bus. Thereby, the Mi print control section prints this character pattern based on the control of the master control section.

These series of operating programs are written in the program ROM.

In a normal printer, the size, shape, etc. of characters to be printed are uniquely specified by the dolatomat lift pattern (character data) stored in the print ROM.

[Problem that the invention seeks to solve]

Conventionally, in printers, all characters corresponding to printed characters are stored in a predetermined pattern, so adjusting the line thickness of the characters to be printed and outputting fine print is a simple process. This was not possible with the basic configuration. Therefore, in order to achieve this, conventionally, multiple print memories for the line thickness that you want to print are prepared, such as a print memory that stores character patterns for thin characters and a print memory that stores character patterns for bold characters. Was. On the other hand, even without adopting this type of configuration, it has been common practice to simply reduce or enlarge normal printing to adjust the line thickness.

However, with this method, the size of the entire print is enlarged or reduced, making it impossible to print out fine characters without changing the size of the entire print.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a fine print method for a printer which can improve the disadvantages of the conventional example and in particular can print out fine print very easily without increasing the memory capacity.

[Means for solving problems]

The present invention includes a memory means for storing a basic pattern A having a predetermined number of dots in the row and column directions, and a printing master control for executing a predetermined calculation program based on the basic pattern A stored in the memory means. It has a section. This printing master control unit performs the following calculation, that is, shifts the basic pattern A by N lines in at least one row direction and obtains an inverted pattern (■) of the shifted pattern. Find a pattern C shifted by N rows in the direction of the other row, execute the logical sum D=B+C based on each pattern of B and C, and logical product the pattern D obtained as a result with the basic pattern A. E=AXD, and this pattern E is used as a printout pattern, thereby achieving the above object.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

The embodiment shown in FIG. 1 includes a master control unit l, a program memory (program ROM) 2, and a buffer memory (R
AM) 3, a doratoma lift pattern memory (print ROM) 4, and a print control section 5, which are connected via an address bus 6 and a data bus 7.

The master control unit 1 has a function of controlling the entire printer device and a function of creating fine print data, and has a program ROM.
The rCP UJ is comprised of a central processing unit (hereinafter referred to as rCP UJ) that operates according to a control program written in the rCP UJ. Each component is controlled via an address bus 6 and a data bus 7.

The program ROM 2 contains a program for controlling the entire printer device and a program for creating fine print data, and outputs control data to the data bus 7 based on commands output from the master control unit 1 via the address bus 6. It has the function of

The RAM 3 is composed of a buffer memory and has a function of temporarily storing print patterns such as calculation results while the fine print print pattern creation program is being executed.

The print ROM 4 stores dot matrix print data (normal print) corresponding to designated characters, and has a function of outputting this print data to the data bus 7 under the control of the master control unit 1. ing.

The print control section 5 has the function of inputting print data via the data bus 7 and sending it to a printing section (not shown) to perform dot printing.

Next, based on the normal print data, create vertical and horizontal lines of multiple dots without changing the thickness of the vertical lines. The method of program control according to No. 1 will be explained based on FIG.

Now, when a command to print a predetermined plurality of dot rectangles colored "black" is input from an external device, the master control unit 1 executes the following commands.
A control program is read from the program ROM 2, and an address for specifying a rectangular dot pattern based on the print command is sent to the print ROM 3, which stores the control program, through the address bus 6.
It also outputs a read command to cause the data bus 7 to output this dot pattern. Next, the master control section 1 internally imports this dot pattern based on the control program. Add this dot pattern to the second
The dot pattern in Figure 2 (11) is a total of 20 dots in i = 4 rows and j = 5 columns, and r
i=1; j=IJ is address 1, ri=1; j=2J is address 2, ri=2; j=IJ is address 5. In this case, r6J r7J
Each address of rl O'J rl IJr14J r15J is a "white" dot, and the others are "black J dots (this pattern is referred to as rAJ).

Next, move A downward i, = 1 line (one pattern overall) (see Figure 2 (2)), find the inverted value of the pattern at that time, and store it (this pattern is hundred"
). This is shown in Figure 2 (3).

Specifically, the inverted value of the dot data written at the original address may be written at each address plus α=5 addresses. Next, the entire pattern of A is moved upward by 1=1 line (subdivision to be made thinner), and the pattern at that time is stored. The specific method is the same as above, β = 5 from each address
Write the dot data written at the original address to the address minus the address (this pattern is called "C"),
This is shown in Figure 2 (4).

Next, the logical sum of the dot data of the "B" pattern and the "C" pattern at the same location is calculated and stored (this pattern is referred to as rDJ). This is shown in Figure 2 (5).

Next, the logical product of the dot data at the same location of the rAJ pattern and rDJ is calculated and stored (this pattern is
EJ), which is shown in FIG. 2 (6), becomes fine print data in which this E pattern is subdivided into fine characters. The master control unit 1 outputs this fine print data E to the data bus 7, and also outputs the fine print data E to the print control unit 5 via the address bus 6.
Outputs a print command to. As a result, the print control section 5
The small print data E is taken in and printed.

Next, the case where the above embodiment is applied to the character rHJ is shown in FIGS. 3 to 7. In this case, FIG. 3 is the basic pattern, and FIG. 7 shows the subdivided print data of this pattern, which is subdivided into i=1 line. In this case, FIG. 4 shows a case where pattern A is shifted downward by one line and then reversed. FIG. 5 shows the case where pattern A is shifted upward by one line (same as FIG. 2 (4)). FIG. 6 shows a case where FIG. 4 and FIG. 5 are logically summed. FIG. 7 shows a case where the logical product E of FIG. 2 and FIG. 6 is taken.

As a result, in FIG. 7, the width (thickness) of the horizontal lines becomes thinner while the thickness of the vertical lines does not change.

In addition, in FIGS. 3 to 7, the dots of dot printing are shown in square shapes for convenience.

In this way, in the above embodiment, the following calculations are performed on the basic pattern A, and the patterns are sequentially determined.

B = A pattern that shifts A downward (or upward) by N lines, a pattern that inverts 100-B, C = a pattern that shifts A upward (or downward) by N lines, D = B + C E = AXD... ...(Desired dot pattern) Here, Fig. 2 shows the case where N = 1, and the shift direction is the result of executing the case where () is not added in the above B, B, and C. There is.

Also, B! :C may be executed first.

Moreover, although the above-mentioned control square is exemplified for thinning the font in the row direction, it is also possible to thin the font in the column direction based on the same concept. Furthermore, the font thinning in the column direction and the row direction may be performed simultaneously. It should be noted that it is impossible to make the characters thinner than that in a portion having a width of 1 bit, and therefore, such a restrictive requirement may be added for control purposes as well.

〔Effect of the invention〕

Since the present invention is configured and functions as described above, it is possible to make a character that is 2 bits thick or more thinner by 1 bit or more simply by using the original dot matrix pattern and performing logical operations on it. It is possible to provide a fine print method for a printer that is unprecedented and excellent in that it can be applied to both the row and column directions and does not particularly require additional memory for this purpose.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 (
1) (2) (3) (4) (5) (6) are explanatory diagrams each showing the operating principle of Fig. 1, and Figs. 3 to 7 are explanatory diagrams each showing the operation of Fig. 1. . 1... Master control unit, 2... Program memory, 3... Buffer memory (RAM
), 4...Bit matrix pattern memory for printing, 5...Print control section, A...
Basic pattern, E...Pattern with fine print. Patent applicant: Japan Electric Co., Ltd. Figure 1 Figure 2 c Note Turn A) (Pattern B)
() Zukoon 100] (Pattern C) () Dimension Turn D) () ψ Turn E) Fig. 3 ) Figure 6

Claims (1)

[Claims] (1) A memory means for storing a basic pattern A having a predetermined number of dots in the row and column directions, and a printing master control for executing a predetermined calculation program based on the basic pattern A stored in the memory means. This printing master control section performs the following calculation, that is, shifts the basic pattern A by N lines in at least one row direction, obtains an inverted pattern @B@ of the shifted pattern, and performs the following calculation. Pattern C is obtained by shifting pattern A by at least N rows in the direction of the other row, and based on each pattern of @B@ and C, logical sum D=@
Fine print of a printer characterized in that it executes B@+C, executes the logical product E=A×D of the pattern D obtained as a result and the basic pattern A, and uses this pattern E as a printout pattern. Printing method.