JPH04126266A - Terminal printer device - Google Patents

Abstract

PURPOSE:To print a reduced character of a normal character by a method wherein a means for ANDing two dot patterns generated by specific two means with each other to convert them to one dot pattern is provided, and a character is printed by changing the number of printing data in a character width direc tion. CONSTITUTION:The parts connected to a system bus 1 are: a character printing data storage part 7 for storing a dot pattern of a character to be printed; a character information conversion part 6 consisting of a means 61 for O-Ring adjacent two dot patterns to convert them one character pattern, a means 62 for reversing the dot pattern generated by the means 61, and a means 63 for ANDing said two dot patterns generated by the means 61, 62 to convert them to one dot pattern; and an external interface part 8 for transmitting/ receiving data to/from a host computer. In this construction, using character information with a printing data density X, character information with a density X for the same character in a reduced mode can be generated.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a character printing method for a terminal printer. [Prior art l Decoration such as highlighting one printed character in terminal blink, ai! Characters that are not small or enlarged are normal characters. In the conventional printing method for reduced characters, when the moving speed of the normal character printing head is V and the periodicity of the printing timing is T, as shown in Fig. a)
The head movement speed is reduced to half V/2, and the figure is printed at the same printing timing T as normal width characters, (b
) The reduced characters were realized as shown in the figure. Alternatively, as shown in FIG. 4, it is possible to have character information designed in advance as a reduced character, use that data as print data, and print at the same head movement speed V as for normal width characters.
By printing at the same printing timing T, reduced characters were printed.

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, the means for moving the print head must have a device that reduces the movement speed to half speed, or character information designed as reduced characters of normal characters must be stored in the internal memory. However, there is a problem in that a corresponding memory capacity must be provided. SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and its purpose is to print characters of normal characters without having a means for moving the print head that reduces the movement speed to half speed. By creating character information for reduced normal characters based on the information,
To make it possible to print reduced normal characters without having to store character information of reduced normal characters in an internal memory.

[Means to solve the problem]

The printer device of the present invention has means for storing character print data, and when the print head moves in the horizontal direction, the logical sum of two dot patterns adjacent to each other in the horizontal direction is taken and converted into one dot pattern. Means, Means (1) for taking the exclusive OR of this dot pattern, Hand j(l
Means (2) for inverting the dot pattern generated by (1). means (3) for logically ANDing the dot pattern newly generated by means (1) and the two dot patterns generated by means (2) and converting them into one dot pattern;
A printer device characterized in that it prints one character by changing the number of print data in the horizontal direction of the character.

[For use]

According to the above means of the present invention, when it is desired to create a reduced character having a width of, for example, 12 dots in the horizontal direction from a character having a width of, for example, 24 dots in the horizontal direction, the logical sum of adjacent print data in the horizontal direction is performed. and make it into one print data. This makes it possible to create vertical print data without damaging it, and to print reduced characters without changing the moving speed of the head.

【Example】

One embodiment of the present invention will be described below. Figure 2 shows
FIG. 1 is a block diagram showing an embodiment of a blinking device of the present invention. A system bus L includes a control unit 2 consisting of a circuit that controls the entire device, a head drive unit 3 consisting of a head for printing characters and its drive circuit, and a carriage that carries the print head and moves in a direction perpendicular to the paper feeding direction. A carriage drive unit 4 consisting of the drive circuit, a paper feed drive unit 5 consisting of a morph and its drive circuit for feeding the paper to be printed, a character print data storage unit 7 for storing the dot pattern of the character to be printed, and character information. Means (61) for converting the character information of printed characters by referring to the logical sum of two adjacent dot patterns and converting them into one dot pattern, the dot pattern generated by the means (61) The inverting means (62), the dot pattern newly generated by the means (61) and the means (
A character information conversion section 6.62) consisting of a device comprising means (63) for converting the logical product of the two dot patterns generated into a single dot pattern, or software thereof; External interface sections 8 for transmitting and receiving data with the host computer are connected to each. Next, the conversion method of the character information conversion section will be explained. Figure 5 shows a character with a width of 24 dots in the horizontal direction and a character with a width of 12 dots in the horizontal direction.
FIG. 3 is a diagram illustrating the basic principle of compressing characters into reduced dot width characters. (a) The figure shows 240DPI (Dot Per I
This is character information represented by (nch). Circles represent printed dots. Also, the data of a character consisting of 24 dots in the horizontal direction of the character is written from left to right, l, 2.3.4.5.6,...21
．． 22.23.24. Figure (b) shows character information of a reduced character with a width of 12 dots in the horizontal direction and is expressed at 240 DPI and generated by conversion. (a) As in the figure, the circles represent printed dots, and the horizontal direction 1
Data of 2-dot characters from left to right, 1
', 2', 3', 4',
5', 6'...10'11', 12
'. The conversion method from (a) figure to (b) figure is as follows: (a) Take the logical sum of the horizontal print data l and 2 of the figure, and AND the resulting data with the inverted NULL data. Take (
b) Store to 1' in the figure. Furthermore, (a) logically OR the print data 3 and 4 in the figure, and (b) logically AND the resulting data with the inverted print data generated at 1' in the figure. Figure 2' Hesdoor. Similarly. (a) Take the logical sum of print data 5 and 6 in the figure, and then take the AND of the resulting data with (b) the inverted version of the print data generated at 2' in the figure. ′. Furthermore, repeating the same process, (a) logically OR the print data 23 and 24 in the figure, and convert the resulting data to (b) 1 in the figure.
1' is logically ANDed with the inverted version of the print data generated at 1', and stored at 12' in the figure (b). As a result, from a character with a width of 24 dots in the horizontal direction to a character with a width of 1 dot in the horizontal direction,
Two-dot wide characters are generated without destroying the vertical print data. Furthermore, by masking adjacent continuous dots, print data is placed at a position of 240 DPI, and reduced characters of 240 DPI can be created, and all of the generated print data has a density of 240 DPI. That is, from character information of a character having print data of a density of X, character information of a reduced character of the same character having print data of a density of X can be created. Since the density of the print data does not change, there is no need to change the print density by changing the moving speed of the print head, and a device for changing the speed of the print head is not required. Furthermore, since reduced characters are generated, there is no need to store such character information internally in advance, and internal memory can be saved accordingly. In the embodiments described above, the generation of character information for reduced characters was described, but by using the above method, the generated data can be printed without changing the print timing by doubling the speed of the print head to generate normal characters. can be printed twice as fast. [Effects of the Invention] As described above, according to the present invention, character information of density X can be created from character information of density X of print data using reduced characters of the same character. Therefore, there is no need to provide a device for changing the moving speed of the print head in order to change the print density (also, there is no need to store character information for reducing the density X in the internal memory).

[Brief explanation of drawings]

FIG. 1 is a diagram clearly showing the configuration of the present invention. FIG. 2 is a block diagram showing an embodiment of the present invention. FIG. 3 is a diagram showing an example of a conventional technique for printing reduced characters. FIG. 4 is a diagram showing another example of the conventional technique for printing reduced characters. FIG. 5 is a diagram showing the basic principle of generating reduced characters from normal width characters according to the present invention. that's all

Claims (1)

[Claims] In a terminal printer device that prints characters by moving a print head, there is a means for storing character print data, and when the print head moves in the horizontal direction, two Means (1) for taking the logical sum of dot patterns and converting them into one dot pattern, means (
Means (2) for inverting the dot pattern generated by means (1), and logical AND of the dot pattern newly generated by means (1) and the two dot patterns generated by means (2) to form one dot pattern. A terminal printer device characterized in that the character is printed by changing the number of print data in the horizontal direction of the character by means (3) for converting the character into a character.