JPS62126470A - Character display device - Google Patents

Abstract

PURPOSE:To obtain a display format to be easily observed by forming a control means for reducing characters other than a character specified by a cursor and displaying the reduced characters. CONSTITUTION:Only the character to be positioned by the cursor so as to be remarked is displayed with normal size and other characters are reduced and displayed. When both gate control signals SA, SB sent from a CPU 6 are logic level '1', a character font signal sent from a character font generating ROM 10 is sent to a display unit 14 as it is, normal display consisting of 24X24 dots is obtained. When the level of the gate control signal SA is converted into logic '0', only the font signal indicating dots in the even strings is sent to a display driving circuit 12 and half-size character display consisting of 24X24 dots is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a character display device suitable for electronic typewriters, word processors, and the like.

[Prior Art] As an example of this type of character display device, for example, a portable Japanese word processor has a limited display area for displaying characters, so only a portion of the text that is keyed in is monitored. I couldn't do that.

[Problems to be Solved by the Invention] However, this type of device has the disadvantage that the display must be scrolled to confirm the character that was previously keyed in, which is extremely troublesome.

In addition, in order to increase the number of displayed characters, it is possible to reduce the printing font (e.g. 24 x 24 dots) to half width and display it, but this is not practical as it may result in characters that are difficult to distinguish for complex kanji. There are drawbacks.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a character display device that can display a large number of characters within a limited display range and provide a display mode that is easy to see.

[Means for Solving the Problems] The present invention provides a character display device equipped with a cursor for specifying a specific character, which is provided with a control means for reducing and displaying characters other than the character specified by the cursor. be.

[Effect] The character where the cursor is located is displayed in normal size,
Other characters are displayed reduced to a predetermined magnification, thereby increasing the number of displayed characters and displaying the character specified by the cursor in an easy-to-read manner.

[Example] Hereinafter, the present invention will be described in detail based on Examples.

FIG. 1 is a block diagram showing an embodiment of a word processor to which the present invention is applied. In this figure, 2 is a keyboard for inputting numbers, 50 syllabary characters, etc.;
13 is a central processing unit (hereinafter referred to as CPU) that controls the operation of this embodiment; 8 is a printer for printing on recording paper; IO is a memory (ROM) for generating a character font (for example, 24×24 dots) corresponding to the input character code; Gl, G2. G3.
G4. -, Gn is character 7t ROM for generating 10
12 is a display drive circuit; 14 is a display device; 12 is a display drive circuit; 14 is a display device;

Next, the operation of this embodiment will be explained with reference to display examples shown in FIGS. 2(A) to 2(I).

Now, two types of gate control signals S sent from the CPU
Assuming that both A and SR are at logic level rl,
The character font signal sent from the character font generation ROM 10 is sent as is to the display 14, so the second
A normal display of 24×24 dots as shown in Figure (A) is obtained.

Furthermore, when the level of the gate control signal SA is converted to logic rOJ, only font signals representing even-numbered rows of dots are sent to the display drive circuit 12, so half-width characters ( A display of 24×12 dots is obtained.

Furthermore, when the operation is performed according to the control procedure shown in Figs. 3 and 4 (described next), the cursor is positioned as shown in Figs. 2 (C) and (D). Normal character display (24 x 24 dots) is displayed for the characters that are displayed, and characters that are reduced to half width (24
X12 dots) are made.

Note that, regardless of the display mode described above, the printer 8 prints all characters using 24×24 dots.

FIG. 3 is a flowchart showing a display routine to be controlled by the CPU.

In step S1, the display digit N on the display 14 is reset (the character displayed at the left end corresponds to N=1).

In step S2, the Nth digit display character (that is, the Nth character displayed from the left on the display 14)
The character font corresponding to the character font generation ROM1
0φ).

In step S3, it is determined whether the cursor is positioned at the above-mentioned Nth digit display position.

If the cursor is located at the Nth column.

In step S4, gate control signals SA and SO(
(See FIG. 1) are both set to logic level "1" to display full-width (24×24 dots) characters.

Also, if the cursor is not located at the Nth digit,
By setting only the gate control signal SB to the logic level "1" in step S5, only the signal representing the even column dots is allowed to pass through, resulting in half-width (24 x 12 dots)
Displays the characters.

In step S6, it is determined whether the value of "N" is °°8'°, in other words, whether the character to be displayed is the character at the right end of the display 14.

As a result, if N=9 has not yet been reached, the value of N is increased by 1 in step S7.

FIG. 4 shows a routine for specifying the display position of the cursor on the display 14.

In this figure, the cursor is ``'' from the left on the display 14.
Suppose that when the cursor is located at the C°th character, the cursor position is °°C.

Therefore, when you press the left shift key, step S
In IO, the value of C'' is decreased by 1, and step S1
In step 2, it is determined whether the value of C' is in the range of 1 or more and 9 or less.

If the value of 11G+1 is outside the range of 1 to 9, a character string shift routine for scrolling the character string to the right or left is executed in step S1B.

Also, when the right shift key is pressed, step S1
4, the value of ncu is incremented by 1, and the processing described above is performed thereafter.

FIGS. 5A and 5B show examples of characters displayed according to this embodiment. Here, Fig. 5 (A)
is a display example using 24×24 dots, and FIG. 5(B) is a display example when the width in the horizontal direction is halved to 24×12 dots. As is clear from this figure, there is a marked difference in readability when complex kanji are displayed half-width and when they are not.

In the embodiments described so far, a line-shaped display device that displays input characters in a horizontal line is used, but the present invention can also be applied to a display device that displays a plurality of characters vertically and horizontally. Of course it is possible.

Further, in addition to the above-described embodiment, it is also possible to display the image by halving its length in the vertical direction.

[Effects of the Invention] As described above, in the present invention, only the character to be focused on where the cursor is located is displayed in normal size, and the other characters are displayed in a reduced size. A large number of characters can be displayed within a certain display range without sacrificing readability.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a word processor to which the present invention is applied; FIGS. 2(A) to (D) are diagrams showing an example of display according to this embodiment; FIGS. Flowchart showing the control procedure in this embodiment. FIGS. 5(A) and 5(B) are diagrams showing examples of displaying kanji in this embodiment. 2...Keyboard, 4...RAM for document storage. 8...CPU, 8...Printer, lO...ROM for character font generation, 12...Display drive circuit, 14...Display device. SA, SB...gate control signal, Gl, G2..., Gn...and gate. Figure 2 Figure 4

Claims (1)

[Scope of Claims] 1) A character display device equipped with a cursor for specifying a specific character, characterized in that the character display device is equipped with a control means for reducing and displaying characters other than the character specified by the cursor. Device. 2) Characters other than those specified by the cursor,
2. The character display device according to claim 1, wherein the character display device is configured to display characters by reducing the width to half a width.