JPH01234281A - Document forming device with centering function - Google Patents

Abstract

PURPOSE:To enable centering at a substantially central image to be applied to document data in an auto-returning mode, by determining a centering position by taking a middle point between a central position of an automatic line feed executing zone and a margin on the other side in the auto-returning mode. CONSTITUTION:In a normal returning mode, a center position for centering is determined by taking a middle point between a left margin LM and a right margin RM, as shown at A in the figure. In an auto-returning mode, the center position for centering is determined by taking a middle point between a central position of a hot zone HZ and a left margin, as shown at B in the figure. A value of 1/2 times the product of the number of characters in the hot zone HZ and a pitch is calculated, and the calculated value is subtracted from pitch data on a right margin position, whereby the central position of the hot zone is calculated as data on the right end of a centering range, and the data is stored into a centering range right end setting register.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to document creation devices such as electronic typewriters and word processors, and particularly to document creation devices having a centering function for centering document data to the center on a predetermined line. It is related to the device.

<Prior Art> Conventionally, one type of document device having the above-mentioned centering function is known to have an auto-return mode. This auto-return function automatically performs a line feed when predetermined data is input in an automatic line feed execution zone set within a certain range from one margin to the other. For example, an area of several characters in front of the light margin is set as an automatic line break execution zone, and an automatic line break (auto return) is performed within the line break zone by manually pressing the space key or hyphen key.

In devices having such an auto-return function, centering is performed based on the midpoint between the left and right margins.

<Problems to be Solved by the Invention> However, the end of each line in auto-return is generally not at the right margin, but between the right margin and the automatic line feed execution zone start position. Therefore, when centering is performed using the midpoint of both margins as a reference, there is a problem in that the centering position becomes biased to the right when the actual document data is used as a reference.

Means for Solving the Problems> The present invention has been made to solve the above problems, and its gist is to provide an auto-return mode as described above and a centering function. In a document creation device having: ■ a centering command means; and ■ based on the command, the other margin position in the auto return mode, that is, the margin position on the opposite side to the side where the automatic line feed execution zone is set, and the automatic line feed execution thereof. The present invention is provided with a centering position determining means for determining a centering position based on the midpoint with the center position of the zone, and (2) a centering execution control means for executing centering based on the determination by the centering position determining means.

Here, the margins are not limited to the left and right margins; for example, in the case of a vertically written document, the margins may be the top and bottom margins.

Additionally, in addition to the auto-return mode, it generally has a normal return mode in which a line break is performed at one margin, such as a write margin, and one of these two modes can be selectively set.

As one aspect of applying the present invention to such models, a return mode discriminating means is provided to determine whether the auto return mode or the normal return mode is set at the time of a centering command, and whether it is the normal return mode or not. For example, the centering position is determined based on the midpoint between both margins, and in auto return mode, the centering position is determined based on the midpoint between the left margin and the center position of the automatic line feed zone, as described above. A determining means may be provided.

<Operations and Effects> According to the present invention, in the auto return mode, instead of using one margin such as the light margin as a reference for determining the centering position, the other margin is determined based on the center position of the automatic line feed execution zone. The centering position is determined by taking the midpoint between the margin and the margin. Therefore, the document data being auto-returned is substantially centered on the central image, and the conventional image biased towards the automatic line feed execution zone is eliminated.

<Embodiment> An embodiment in which the present invention is applied to an electronic typewriter will be described below with reference to the drawings.

The electronic typewriter shown in FIG. 2 includes a keyboard 2 and a printing mechanism 4, and a liquid crystal display 6 having a predetermined number of lines is provided between them. Keyboard 2 has character keys,
Various function keys are provided, including character keys 8 such as numeric keys and symbol keys, a centering key 12, an auto-return mode key 14, a margin key, and an enter key (although their symbols are omitted).

The printing mechanism 4 includes a platen 30 that also serves as a paper feed roller,
The carriage 32 includes a wheel cassette 36 that accommodates a type wheel 34 and a ribbon cassette 38 that accommodates a print ribbon.
and a printing hammer driven by a solenoid 40.

And platen 30. Killridge 32. Each of the type wheels 34 is driven by a motor (not shown), and a character to be printed is selected by rotation of the type wheel 34, and printing is performed by striking it with a print hammer.

The control circuit for the wood typewriter is shown in Figure 3.

The keyboard 2 is connected to a CPU 52 as a central processing unit via a keyboard input circuit 50.
52 is ROM54. ROM56. Print drive circuit 58. A common bus line 62 interconnects the display controller 60 and the keyboard input circuit 50 .

The ROM 54 is provided with a program memory 64 that stores programs for controlling various operations such as print 9 display, auto return, and centering of the wood typewriter.

The RAM 56 includes an input buffer 66 that temporarily stores key input data, a margin memory 68 that stores the left and right margin positions, a hot zone character count memory 70 that stores the number of characters in the hot zone as an automatic line feed execution zone, and an auto An auto-return mode flag register 72 that stores whether or not it is the return mode, a centering range right end setting register 74 that stores the position data of the right end of the centering range, a centering center position register 76 that stores the center position that is the reference for centering, and a centering mode. A centering mode flag register 78 for setting a flag indicating that the centering mode flag is set, and various necessary registers, counters, etc. are provided.

The print drive circuit 58 operates the above-described printing mechanism 4 by moving the carriage 2 and rotating the type wheel 34 to select a type based on the carriage movement signal and type selection signal supplied from the CPU 52. Control.

The display controller 60 is a unit that displays characters on the liquid crystal display 6 in the form of a dot matrix, and includes a character generator that stores each character pattern in correspondence with character code data. It is connected to the.

Next, FIG. 4 shows a flowchart mainly showing portions of the program stored in the program memory 66 of the ROM 54 that are closely related to the present invention.

When the power is turned on, initial settings are performed in step 81 (hereinafter, "step" will be abbreviated as SL, and the same applies to other steps), and the system enters a state of waiting for key input in step S2. Therefore, when the centering key 12 is pressed,
After the YES determination in S3, the process moves to a centering mode setting routine.

This is shown in FIG. First, in S81, it is determined whether the carriage position is at the left margin (LM). This centering is centering between margins, and if the carriage 2 is at the left margin when the auto-return mode key 14 is pressed, the process moves to S82, but if not, an error process occurs at SS8.

In addition to the margin-to-margin centering described above, wood typewriters also include inter-tab centering, which centers between a predetermined tab and the next tab, and arbitrary point centering, which centers around the current carriage position. , if it has three types of centering functions,
S81 N.

After determining whether the carriage is at the tab position,
It is also possible to create a program that performs inter-tab centering if it is at the tab position, and otherwise performs arbitrary centering around the current carriage position.

By transitioning from SSI to 882, it is determined whether the auto return mode is currently in effect. RAM56
If the flag in the auto-return mode flag register 72 is ON, the process moves to SS3, but if it is OFF, it means the normal return mode, and the process moves to SS4. This step 884 is a step to set the right end of the centering (CTR) range to the right margin (RM) position.
The position data of the right margin is stored in the centering range right end setting register 74. For example, as shown in FIG. 6, if the left margin (LM) is the O-th character and the right margin (RM) is the 20th character, the information on the 20th character is stored in the register 74 mentioned above. .

On the other hand, in the auto return mode, the right end of the centering range is set by executing S83. In other words, by calculating the number of hot zone (H2) characters (for example, 6 characters in the example in Figure 5) multiplied by the pitch, 172, and subtracting this from the pitch data at the right margin position, the center position of the hot zone is centered. This data is highlighted as the data at the right end of the range, and this data is stored in the centering range right end setting register 74.

After the right end of the centering range is determined by SS3 or SS4, the process moves to S5 and the J
: An operation is performed to find the midpoint between the right end of the centering range determined as above and the left margin, and the value is stored in the centering center position register 76 of the RAM 56 as centering center position data.

In the normal return mode, the centering center position is determined by taking the midpoint between the left margin and the right margin, for example, as shown in FIG. 6 (A), and in the auto return mode, for example, As shown in (B) of the figure, the centering center position is determined by taking the midpoint between the hot zone center position and the light margin.

After such S85, S86 is executed, and the number of inputtable pitches, in other words, the upper limit of the number of characters to be centered is set according to the right end position of the centering range. In other words, subtract 2 pitches (equivalent to 2 characters) from the total number of pitches between the left margin and the right end of the centering range to determine the number of bits that can be entered. It makes it meaningful in practice.

After that, the centering mode flag is set to O at SS7.
N is entered, the centering mode is started, and the step returns to 82 in FIG.

If a character to be centered is input in this centering mode, 82.33.8
5, the data is temporarily stored in the input buffer 66 of the RAM 56 in S9. When a predetermined enter key is pressed after inputting character data within the range of inputtable pitches mentioned above, 32. S3.85.86 then S7
The centering center position is changed depending on each return mode, for example, as shown in (8) in Figure 6 in the normal return mode, and as shown in (B) in the auto return mode. The centering printing is then executed, and then the centering mode is canceled in S8 and the process returns to S2.

As is clear from the above description, in this embodiment, the centering key 12 and the CP that performs the manual processing of this key are
U52 constitutes centering command means.

Also, of the program memory 64, SS2.
The memory area that stores steps such as SS3.885 and the CPtJ52 that executes them constitute centering position determining means in the auto return mode, and similarly, step S7 in FIG.
The memory area that stores this and the CPtJ5 that executes it
2 constitutes centering execution control means.

Note that the right end of the centering range in the auto-return mode does not necessarily have to be at the exact center of the hot zone, but may be approximately at the center.

Further, in the embodiments described above, the centering in printing on printing paper was explained as an example, but the present invention is not necessarily limited to printing, and the present invention can be similarly applied to centering on a display. .

Therefore, the present invention is applicable not only to typewriters but also to various document creation devices such as word processors without a printing mechanism.

It goes without saying that the present invention can be implemented with various other modifications based on the knowledge of those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of the present invention. FIG. 2 is a perspective view of an electronic typewriter which is an embodiment of the present invention. FIG. 3 is a block diagram showing the control circuit of the typewriter. FIG. 4 is a flowchart mainly showing the part deeply related to the present invention out of the program memory stored in the program memory of the ROM, and FIG. 5 is a flowchart showing the centering mode setting routine therein. be. Figure 6 is a diagram showing an example of centering.
8) shows the case in the normal return mode, and (B) in the lower row shows the case in the auto return mode.

Claims (1)

[Claims] An auto-return mode is provided in which a line feed is automatically performed when specific data is input in an automatic line feed execution zone set in a certain range from one margin to the other margin, and A document creation device having a centering function of centering document data to the center on a predetermined line between both margins, comprising: a centering command means; and, based on the command, the other margin position and the automatic line feed execution zone in the auto return mode. A centering function characterized by comprising a centering position determining means for determining a centering position based on a midpoint between the center position and a center position of the centering position, and a centering execution control means for executing centering based on the determination by the centering position determining means. A document creation device having: