JPS62146670A - Electronic typewriter - Google Patents

Abstract

PURPOSE:To realize full space justify printing, by a method wherein the resetting processing of a right margin is automatically controlled so as to be performed at the position nearest to a present set position by the operation of the right margin position stored in a right margin memory means and the printing pitch stored in a printing pitch memory means. CONSTITUTION:When a printing pitch is altered, a new printing pitch is set and a present carriage position acquired as a temporary right margin SRM and divided by the new printing pitch to calculate the surplus quantity B thereof and said quantity B is compared with the half value of the new printing pitch. If the comparing result C is positive, the position of the new right margin becomes inside the present carriage position and, therefore, the surplus quantity B is subtracted from the temporary right margin SRM to set the position of an original right margin RM. When the comparing result is negative, the difference between the new pitch and the surplus quantity B is added to the temporary right margin SRM to set the position of RM. By this operational processing, a position integer times the altered printing pitch and nearest to the presently set right margin is calculated.

Description

[Detailed Description of the Invention] This invention is suitable for printing European language documents.
This relates to electronic typewriters that can automatically set the margin when changing the print pitch. In particular, when changing the print pitch during Justify (right alignment) printing, set the margin closest to the currently set light margin. The present invention relates to an electronic typewriter in which a print pattern with an easy-to-read character arrangement is obtained by complete full-space justified printing by controlling a write margin to be set at a certain position.

Prior art electronic typewriters are provided with a printing position function, and are provided with means for setting a left margin, a right margin, etc. in order to control the easy-to-read literary arrangement and printing range.

FIG. 3 is a functional block diagram showing an example of the main structure of a conventional electronic typewriter.

In the drawings, reference numeral 9 denotes an operation unit consisting of a keyboard, 10 a keyboard control unit, 11 a system control unit, 12 a buffer memory, 13 a buffer memory control unit, 14 a printer, 15 a printer control unit, 16 a display device, 17 is a display control section, 18 is a data bus, and 19 is a control line.

The electronic typewriter has a configuration as shown in FIG.

The operation section 9 consists of a keyboard, through which necessary character data, control signals for printing, etc. are input by key operations.

The keyboard control unit 10 determines the data input from the operation unit 9, and if it is character code data, it is sent to the buffer memory 12, and if it is control signal data, it is sent to the corresponding control units 13, 15. .17.

The buffer memory 12 has a memory capacity to store data for one print line to several print lines.

It is controlled by the buffer memory control section 13.

The printer 14 is controlled by a printer control unit 15,
1 depending on the character code stored in the buffer memory 12.
Print the document.

The display device 116 is an LCD (liquid crystal display), an L-line display, or the like, and has a display capacity of one line or several lines. A character code is used to display a single character in a visible pattern.

The system control unit 11 includes a CPU, a program ROM,
It is composed of a program RAM, a system RAM, etc., and controls the entire system of the electronic typewriter.

When printing with such an electronic typewriter, it often happens that it is desired to change the printing pitch while printing a -page document.

However, when the printing pitch is changed, the position of the right margin changes, which causes the inconvenience that, especially in the case of just printing, the arrangement of the characters at the right end becomes irregular, resulting in an unsightly document6. - Therefore, in the electronic typewriter of the present invention, such inconveniences that occur when changing the printing pitch in conventional electronic typewriters are solved, and a process for resetting the light margin by changing the printing pitch is currently set. By controlling the position to be automatically set to the position closest to the right margin position, full space just printing can be achieved and a print pattern with an easy-to-read character arrangement can be obtained. purpose.

To this end, the electronic typewriter of the present invention includes a light margin storage means for storing the currently set position of the right margin, a print pitch storage means for storing the changed print pitch, and a light margin storage means for storing the currently set position of the write margin. By calculating the light margin position stored in the storage means and the printing pitch stored in the printing pitch storage means, a quotient and a remainder amount are calculated, and this remainder amount is used as the printing pitch stored in the printing pitch storage means. Calculating means is provided for comparing the printing pitch with a half value of the pitch and calculating a position that is an integer multiple of the changed printing pitch and is closest to the currently set lie 1-margin.

Next, embodiments of the electronic typewriter of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a functional block diagram showing one embodiment of a printer unit, which is a main part of an electronic typewriter of the present invention.
is input buffer memory, 3 is printer controller, 4 is
is a type selection control section, 5 is a hammer control section, 6 is a carriage control section, 7 is a ribbon feed control section, 8 is a line feed control section, Ml is a selection motor, M2 is a carriage motor, M3 is a ribbon motor, M4 is a line Feed motor, HM indicates hammer magnet.

The electronic typewriter of FIG. 1 is basically the same as a conventional electronic typewriter.

Parallel data DAT, such as 8 bits or 16 bits, is input from the system controller 1 to the input buffer memory 2.
Inputted as A.

Input data DATA is input at the timing of strobe signal 5TROBH. Note that the input data DATA is sent to the system controller l only when the control signal READY is generated from the printer controller 3.
It is possible to input from

This manual buffer memory 2 generally has a memory capacity that is capable of storing data from the print line to several lines.

Also, the control signals for controlling the printing operation.

6 stored in the printer controller 3, for example.

Information such as the currently set write margin and printing pitch is also stored here.

In the electronic typewriter of this invention, even if the printing pitch is changed during Justify printing, the light margin is controlled so that it is reset to the position closest to the currently set light margin. Achieves full space and just printing.

Fig. 2 is a flowchart showing the process flow of resetting the light margin when changing the printing pitch in this electronic typewriter. shows.

When the printing pitch is changed, the flow shown in FIG. 2 starts.

First, set a new printing pitch.

Next, set the current carriage position to the temporary write margin SRM.
Import as.

Then, the temporary write margin SRM is divided by the new printing pitch, and the remainder amount B is calculated.

If this surplus amount B is tg O##, the temporary write margin SRM is changed to the original write margin R.
Let it be M. In this case, the light margin R is substantially
M is not changed.

On the other hand, when the remaining amount B is not #J　O#.

Compare the half value of the new printing pitch and the remaining amount B,
Comparison result C is obtained.

If this comparison result C is positive, the position of the light margin to be set according to the new print pitch will be inside the current carriage position, that is, the current set of light margins, so there will be a surplus from the temporary light margin SRM. The amount B is subtracted to obtain the original write margin RM position.

On the other hand, when this comparison result C is negative, the remaining amount B is determined by the new pitch and the remaining amount B, since the position of the light margin to be added by the new printing pitch is outside the current carriage position. In addition to the temporary write margin SRM, the difference between the two positions is taken as the position of the original write margin RM.

Through such arithmetic processing, a position that is an integral multiple of the changed printing pitch and is closest to the currently set light margin is calculated.

Therefore, by determining the position of a new lie 1-margin RM based on the result of this calculation, it is possible to always create a document in which the right edge of the text is neatly aligned even with just printing.

In the above embodiments, the case where the processing is performed in a software manner is explained, but it is also possible to perform the processing in a hardware manner.In this case, by using a known logic circuit, etc. The means for performing the processing can be easily configured.

As described above in detail, the electronic typewriter of the present invention includes a light margin storage means for storing the currently set position of the write margin, a print pitch storage means for storing the changed print pitch, and a light margin storage means for storing the currently set position of the write margin. By calculating the light margin position stored in the storage means and the printing pitch stored in the printing pitch storage means, a quotient and a remainder amount are calculated, and this remainder amount is used as the printing pitch stored in the printing pitch storage means. Calculating means is provided for comparing the printing pitch with a half value of the pitch and calculating a position that is an integral multiple of the changed printing pitch and is closest to the currently set light margin.

Effects Therefore, according to the electronic typewriter of the present invention, even if the printing pitch is changed during Justify printing, the light margin is automatically set at the position closest to the currently set light margin. As a result, it is possible to obtain a print pattern with an easy-to-read character arrangement through complete full-space justified printing, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing one embodiment of the printer section, which is the main part of the electronic typewriter of the present invention. FIG. FIG. 3 is a flowchart showing the process flow for resetting the light margin, and FIG. 3 is a functional block diagram showing an example of the main structure of a conventional electronic typewriter. In the drawing, l is a system controller, 2 is an input buffer memory, 3 is a printer controller, 4 is a type selection control unit, 5 is a hammer control unit, 6 is a carriage control unit, 7 is a ribbon feed control unit, 8 is a line feed control unit, Ml is a selection motor, M2 is a carriage motor, and M3 is a Ribbon motor, M4 is line feed motor, HM is hammer magnet.

Claims (1)

[Claims] A light margin storage means for storing the currently set light margin position, a printing pitch storage means for storing the changed printing pitch, and a light margin position and the printing pitch storage stored in the light margin storage means. The quotient and the remainder are calculated by calculation with the printing pitch stored in the printing pitch means, and the remaining amount is compared with the half value of the printing pitch stored in the printing pitch storage means, and the changed printing is calculated. 1. An electronic typewriter, comprising: calculation means for calculating a position that is an integral multiple of the pitch and is closest to the currently set write margin.