JPH0375164A - Serial printer - Google Patents

Abstract

PURPOSE:To print even the characters of a character set having character size larger than the length of a printing head naturally by imparting information displaying character size at every character set and controlling printing according to character size. CONSTITUTION:When a standard character set is selected, a printing data required is read from a standard character set memory 2, and edited to a print ing buffer 4, and the printing data edited by the printing buffer 4 is transmitted to a printing head driver 5 while controlling a traversing motor driver 6 when printing is started, thus forming a character. When an additional character set is selected, the data of the upper half of a character is read from an addi tional character set memory 3, and edited to the printing buffer 4, and the data of the upper hald edited is printed when printing is started. A paper-feed motor driver 7 is controlled so as to conduct paper-feed corresponding to the length of a printing head. The data of a lower half is read from the additional character set memory 3 next, and edited to the printing buffer 4, and the lower half of the character is printed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a serial printer, and particularly to a serial printer that prints a plurality of character sets of different character sizes.

[Conventional technology]

In conventional serial printers, the character size of the character set is limited to the length of the print head, and when printing a character set whose character size exceeds the length of the print head, the standard character A character set with a large character size was realized by performing some kind of calculation on the data of a character set of a large character size.

FIG. 4 is an explanatory diagram of a character example showing an example of a character obtained by doubling the characters in the standard character set both vertically and horizontally.

As shown in FIG. 4, as the characters become larger, the unnaturalness of the characters in the standard character set is also magnified.

[Problem to be solved by the invention]

The conventional serial printer described above prints a character set whose character size exceeds the length of the print head.
Since some kind of calculation is performed on data of a character set of standard character size, it has the disadvantage that unnaturalness as seen in FIG. 4 remains in the printing result.

[Means to solve the problem]

The serial printer of the present invention is capable of adding at least one character set in addition to the standard character set, and in a serial printer that can select and print any character set, each character set is It has information indicating the vertical character size, and prints the necessary number of times according to the character size. When printing in multiple times, the necessary data is sent to the print head depending on how many times it is printed. The paper is fed by the length of the print head between each print.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a serial printer of the present invention.

This embodiment is a 24-bin dot serial printer in which an additional character set of 48x48 dots is added to the standard character set of 24x24 dots.

1i111!1 part 1 reads information indicating the character size of the standard character set and additional character set in advance, and when the standard character set is selected, reads the necessary print data from the standard character set memory 2, When printing is started, the edited print data is transferred to the print buffer 4 while controlling the horizontal feed motor driver 6 and controlling the print head driver 6.
Characters are formed by sending the print data edited in the print buffer 4 to the print head driver 5.

When an additional character set is selected, the upper half of the character data is read from the additional character set memory 3 and edited into the print buffer 4, and when printing is started, the edited upper half data is read from the additional character set memory 3 and edited into the print buffer 4. Next, the paper feed motor driver 7 is controlled to feed the paper by the length of the print head. Then, the lower half data is read from the additional character set memory 3 and edited into the print buffer 4, and the lower half of the characters are printed.

FIG. 2 is a character example explanatory diagram showing an example of characters of the standard character set of this embodiment. Further, FIG. 3 is a character example explanatory diagram showing an example of characters of the additional character set of this embodiment.

As can be seen by comparing Figures 3 and 4, the characters in Figure 4, which are the characters in Figure 2 enlarged using a conventional serial printer, are larger than the characters in Figure 3, which is the additional character set of this embodiment. ,
The unnaturalness is quite noticeable.

〔Effect of the invention〕

As explained above, the serial printer of the present invention can print characters of character sets having various character sizes by providing information indicating the character size for each character set and performing printing control according to the character size. In particular, it has the effect that characters of a character set having a character size larger than the length of the print head can be printed without causing any unnaturalness.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the serial printer of the present invention, Fig. 2 is a character example explanatory diagram showing an example of characters of the standard character set of this embodiment, and Fig. 3 is an additional character of this embodiment. FIG. 4 is an explanatory diagram showing an example of a character set, and FIG. 4 is an explanatory diagram showing an example of a character obtained by doubling the characters in the standard character set both vertically and horizontally. l...Control unit, 2...Standard character set memory, 3.
...Additional character set memory, 4...Print buffer, 5
・-・Print head driver, 6... Horizontal feed motor driver 7... Paper feed motor driver.

Claims (1)

[Claims] Indicates the vertical character size for each character set in serial printers that can add at least one character set to the standard character set and print by selecting one of the character sets. The information is printed in the necessary number of times depending on the font size, and when printing in multiple times, the necessary data is sent to the print head depending on how many times it is printed. A serial printer characterized by feeding paper by the length of the print head between the printer and the printer.