JPS5853475A - Printer - Google Patents

Abstract

PURPOSE:To raise the efficiency of operation by providing a system in which composite letters can be erased at a time by operating a correcting key for a printer provided with an automatic correction mechanism for composite letters. CONSTITUTION:For example, when the letter Yen of composite letters is printed, the letter key Y of a key board KB is first pushed to house the letter in a register C, a letter information is housed in a line buffer LB, the letter Y is printed by a printer PRT, and immediately after the printing, a head H is moved to the next printing position. Then, the printing head H is returned to the position of Y previously printed, and the letter key = is depressed, whereupon the letter = is likewise printed by the printer PRT and the composite letter Yen is printed. When erasing the letter, the printing head H is matched the letter to be erased and a correcting key CK is pushed, whereupon flag F is set by CPU and the letter = is erased. Furthermore, since the flag F is still set, the letter Y is erased and the flag F is finally cleared.

Description

[Detailed Description of the Invention] The present invention relates to a printing device such as an electronic typewriter that is equipped with an automatic correction function and an automatic correction function for special C composite characters. .

Composite character 2 When printing, for example, "¥" [2 is conventional] Since there is no printed character "¥" in 2, the characters rYJ and "-" are printed in the same place C- and are combined.

However, conventional electronic typewriters (2) print such composite characters (-) print rYJ on the line buffer memory that stores character information, and print 7 upper C2 "=". When rYJ is printed, the character information printed with rYJ is deleted from the line buffer, and the character information "-" (Y) is replaced. Therefore, the deletion of the composite character is done by The characters "=" could not be erased automatically, and the characters that could not be erased had to be erased by another means, making the erasing process complicated and time consuming.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art.It is an object of the present invention to provide a printing device configured such that a composite character can be erased once by operating a correction key. It is an object.

In order to achieve the above object in the present invention C2, (2) a storage device is provided for storing the history of printed characters, composite character information in which at least two or more characters are combined is stored, and composite characters are synthesized according to this composite character information. A structure has been adopted that allows characters to be erased at once (rather than by operating two keys).

Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

FIG. 1 is a block diagram illustrating an embodiment of the present invention.
It is equipped with a correction key CK and other various character keys and control keys. PRT indicates a printer, which is equipped with a print head H controlled by the CPU. central processing unit C
The PU includes a register C and a flag F for storing character information from the keyboard KB. LB indicates line buffer memory, and WKM indicates working memory.

Next, the operation of this embodiment configured as described above will be explained.

For example, when printing the composite character "\", C2 is the first (- When the character key rVJ of keyboard KB is pressed, the CPU stores the character key from register C (2) and line buffer LBl2 (see Figure 2). (8) As shown in C- (- stores the character information, the printer PRT prints the character rYJ, and immediately after printing, the print head H moves to the next printing position.

Next (-Print head H point (2nd printed rYJ position (-
When the character key "-" is pressed, the CPU stores the character information and uses the working memory WKM as shown in Figure 2 (B) (2). Memory L stores this character information.

In addition, "(", ")" indicates that there are two printed characters at the same printing position, "(" indicates the beginning of the printed information, and "
)” indicates the end. Printer PRT prints “=” and “
The composite character “¥” is printed.

Next, we will explain one method C for erasing the C'-composite character "\".

First, when the print head H is aligned over the character to be erased and the correction key CK is pressed, the CPU sets a flag F and searches the line buffer for information on the print character on the print head H.

Then, the character information of "-" is stored in the register C from the contents of the line buffer LB shown in Fig. 2 (Bl).The flag F is set in the printer PRT. Therefore, delete the printed character "=".

Next (- stores the character information "Y" in register C, and in the same way as described above (niblink PRT erases the printed character rYJ. Then, all the printed characters of the printed character information between "(" and ")" When erased, flag F is cleared and the printed character information is deleted from the line buffer.

The operation described above (by pressing the correction key (-) can automatically erase a series of composite characters by C2, once (2).

As is clear from the above explanation (according to the present invention C2, 2
The composite character information is stored by combining two or more printed characters, and the composite character information stored by pressing the correction key (-) is configured so that the composite character information can be erased at once. By simply pressing the correction key, composite characters can be automatically deleted in a very short time, which has excellent effects such as greatly improving work efficiency.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the present invention; FIG. 1 is a block diagram of a control circuit, and FIGS. 2(A) and 2(B) are explanatory diagrams showing the contents of a line buffer memory. CPU: Central processing unit KB: Keyboard LB: Line buffer memory PRT: Blink WKM-: Working memory.

Claims (1)

[Claims] It is equipped with a storage device that stores composite character information by combining at least two or more printed characters, and a modification key that commands a modification operation. A printing device characterized by having two configurations so that it can be printed.