JPH0214167A - Printing system - Google Patents

Abstract

PURPOSE:To make identical the results of printing in two directions by a method wherein data are read out only in one direction so as to conduct a thinning-out processing of a pattern when the data are read out of a memory, a buffer memory wherein the result of the processing temporarily is stored is provided and the data are read out in two directions at the time of printing. CONSTITUTION:A control circuit 10 reads data out of a pattern memory 11 only in one direction so as to conduct a thinning-out processing and stores the data temporarily in a buffer memory 12. When a pattern of Fig. A is read from the left to the right and to conduct the thinning-out processing and stored in the buffer memory 12, for instance, a pattern as shown in Fig. B is stored therein. By reading the data out of the buffer memory 12 at the time of a printing processing, high-speed printing can be executed. Since the reading out of the pattern memory 11 is made only in one direction, besides, the data in the buffer memory are always found to be identical. Accordingly, the same result of printing is obtained when the buffer memory 12 is read in two directions for printing.

Description

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

[Conventional technology]

Conventionally, when reading data from pattern memory and printing with a serial dot matrix printer, the reading order is reversed between printing when the print head goes from left to right and printing when it goes from right to left. is common.

[Problem to be solved by the invention]

When printing is performed using this reading method so that two dots are not consecutive in the printing direction (hereinafter referred to as thinning processing), the printing result from left to right is different from the printing result from right to left.

When printing by performing general thinning from the pattern shown in Figure 2 (A), the printing result from left to right will be the second
In contrast, the printing results from right to left are as shown in FIG. 2(C), and the printing results are different.

[Means to solve the problem]

According to the present invention, the present invention includes a pattern memory that generates a character pattern, and a buffer memory that performs pattern thinning processing by reading data from only one direction when reading data from the memory, and temporarily stores the result. Sometimes a printing method is obtained which is characterized in that the buffer memory is read from both directions.

〔Example〕

Next, the present invention will be described in more detail with reference to the drawings showing one embodiment of the present invention.

Referring to FIG. 1, in one embodiment of the present invention, a control circuit 10 reads data from a pattern memory 11 in only one direction, performs thinning processing, and temporarily stores the data in a buffer memory 12. For example, if a pattern as shown in FIG. 2(A) is read from left to right, thinned out, and stored in the buffer memory 12,
2 stores a pattern as shown in FIG. 2(B).

By reading data from the buffer memory 12 during printing processing, high-speed printing can be performed. Further, since reading from the pattern memory 11 is performed only from one direction, the data in the buffer memory is always the same. Therefore, even if the buffer memory 12 is read from both directions and printed, the printing results are the same, improving printing quality.

If printing is performed using the thinning process of the present invention, the printing result from left to right and the printing result from right to left are as shown in FIG. 2 (B) or (
It is possible to unify the pattern to one of C).

〔Effect of the invention〕

As described above, according to the present invention, it is possible to make the printing results in both directions the same in thinning pattern printing for high speed printing, and it is possible to improve the print quality of high speed printing using thinning patterns.

[Brief explanation of the drawing]

Figure 1 is a block diagram of an embodiment of the present invention, Figure 2 (A)
-(C) are diagrams showing examples of kanji patterns and thinning patterns. 10... Control circuit, 11... Pattern memory, 12
...buffer memory. Agent patent attorney Shindai Uchihara! Figure (A) (β di (C) Figure Z

Claims (1)

[Claims] It has a pattern memory that generates character patterns, and a buffer memory that thins out the pattern by reading it from only one direction when reading data from the memory, and temporarily stores the result.When printing, the buffer memory is used in both directions. A printing method characterized by reading from.