JPH0345398B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device, and more particularly to an improvement in a display device for displaying multiple lines of text, such as a display device used in a word processor or the like.

For example, a device that processes text, such as a word processor, is equipped with a display device (eg, a CRT display) for displaying text currently being input through key operations or text read from a floppy disk. This kind of display device can display multiple lines of text, but one of them is
The number of characters that can be displayed on the screen is fixed. That is, the number of characters (hereinafter simply referred to as characters) that can be displayed on one line and the number of lines that can be displayed on one screen are fixed. By the way, when creating a manuscript to be input into a word processor, the layout is not necessarily adjusted to the size of the number of display strokes. For example, if a display device can display 40 characters in one line, a manuscript may be laid out with more than 40 characters in each line (including blank spaces). When inputting text according to such a manuscript, the text that was written on one line in the manuscript will be displayed over multiple lines on the display device. As a result, the text is displayed in a layout different from that of the original, making it difficult to edit or correct the text. In particular, it becomes almost impossible to edit sentences (such as mathematical formulas) whose meaning is difficult to understand unless they are displayed on a single line while looking at the display device.

This will be specifically explained with reference to FIGS. 1 and 2.

FIG. 1 is a diagram showing the layout of a manuscript before it is input into a word processor or the like. Further, FIG. 2 is a diagram showing the contents displayed on a conventional display device when a document as shown in FIG. 1 is input. In the manuscript shown in Figure 1, each line of the document (including blank areas) is laid out with 17 characters. In contrast, a display device can only display 10 characters on one line. Therefore, what is one line of text in the manuscript is displayed over two lines on the display device. Therefore, in a document containing mathematical formulas, ruled lines, etc. as shown in FIG. 1, it is almost impossible to grasp the original meaning from the content displayed on the display device.

Therefore, the main object of the present invention is to provide a display device that can overcome the above-mentioned drawbacks.

In the display device according to the present invention, when the number of characters sequentially inputted from the input means in each line of a document to be displayed on the display device exceeds the number of characters that can be displayed on one line of the display screen of the display device, , or when the number of characters set in advance in the setting means (the number of characters for one line of the document) is exceeded, the display contents of the entire display screen of the display unit are moved in one direction or the other in the line direction, and the display In response to the display position of the mark displayed on the device reaching a predetermined display position, the display content of the entire display screen is moved in one or the other direction in the row direction.

The above objects and other objects and features of the present invention will become more apparent from the following detailed description with reference to the drawings.

FIG. 3 is a block diagram showing one embodiment of the present invention. The key code output from the keyboard 1 is given to the microprocessor 3. A data file 2 is for reading text stored in advance on a floppy disk, for example, and its output is given to a microprocessor 3. This microprocessor 3 is, for example, a CPU 31 or a ROM.
32 and RAM33. The ROM 32 stores an operating program as shown in FIG. 8, for example, and the CPU 31 operates according to this operating program. Further, the RAM 33 includes a storage area as shown in FIG. 5, for example. The character code read from RAM 33 is given to refresh memory 5 via data bus 4. This refresh memory 5 is a display device 1 for displaying text.
It has an address corresponding to the character display position on the display screen of 0. Then, the microprocessor 3 gives a write address to the refresh memory 5 via the address selector 6, and specifies the address where the character code is to be written.

The CRT controller 7 is for controlling the display of the display 10, and provides horizontal/vertical synchronization signals to the display 10, and also controls the address selector 6.
An address for reading the character code is given to the refresh memory 5 via the . In this way, the address selector 6 contains the character code write address from the microprocessor 3 and the CRT controller 7.
Furthermore, an output switching signal is supplied from the microprocessor 3, and which address is output is controlled in accordance with the output switching signal. That is, the address selector 6 is connected to the refresh memory 5.
When writing a character code to microprocessor 3
On the other hand, when reading a character code from the refresh memory 5, the address given from the CRT controller 7 is selected and output. Note that when the character code is written in the refresh memory 5, the display 1
The display of 0 is stopped.

The character code read from the refresh memory 5 by the CRT controller 7 is given to the font memory 8. This font memory 8 stores display pattern data for each character code.
Then, the font memory 8 outputs display pattern data corresponding to the character code given from the refresh memory 5 and supplies it to the parallel-to-serial conversion circuit 9. This parallel-to-serial converter circuit 9 converts the applied bit-parallel display pattern data into serial data, ie, a video signal, and supplies it to the display 10.
In this way, the character code read from a certain address in the refresh memory 5 is displayed at the corresponding character display position on the display 10.

FIG. 4 is a key arrangement diagram of the keyboard 1 shown in FIG. 3. In the figure, a keyboard 1 includes character keys 101 for inputting various characters, a numeric keypad 102 for inputting numerical information, and various function keys 104. Note that the function key 104 is used to select one of the sentences to be displayed on the display 10.
It includes a line length setting key 104a for setting the number of characters per line (including empty space), and a line number setting key 104b for setting the number of lines of text to be displayed on the display 10. In other words, line length setting key 1
When the numeric keypad 102 is operated after 04a is operated, the numerical information entered by the numeric keypad is
It is stored in a predetermined area of the RAM 33, and the number of characters for one line of text to be displayed is set. The number of characters can be set to exceed the number of characters that can be displayed in one line on the display 10. For example, as shown in Figure 1, the number of characters in one line of the original before input is set as is. Ru. Similarly, line number setting key 10
When the numeric keypad 102 is operated after 4b is operated, the numerical information inputted by the numeric keypad 102 is stored in a predetermined area of the RAM 33, and the number of lines of text to be displayed is set. The number of lines can be set to exceed the number of lines that can be displayed on the display 10, and for example, the number of lines of a document as shown in FIG. 1 can be set as is.

Furthermore, the keyboard 1 has a cursor movement key 10
Contains 3. The cursor movement key 103 is a key for moving the cursor mark displayed on the display 10 to an arbitrary character display position, and includes cursor keys 103a and 103b for moving the cursor mark in a direction perpendicular to the line direction of the text. , cursor keys 103c and 103d for moving the cursor mark along the line direction of the text. These cursor keys 103a to 103d are used to specify character input positions, editing points, and correction points on the display screen of the display unit 10, while cursor keys 103c and 103d command scrolling along the line direction of the displayed text. It is also used as a scroll command key.

FIG. 5 is an illustrative diagram showing the storage area of the RAM 33 shown in FIG. In the figure, the RAM 33 includes an area 331 (hereinafter referred to as N register) for storing the number of characters N for one line of text to be displayed set by the line length setting key 104a, and a line number setting key 104.
An area (hereinafter referred to as M register) 332 that stores the number of lines M of text to be displayed set by b.
including. Further, the RAM 33 includes an area (hereinafter referred to as character code area) 333 for storing character codes input using the character keys 101 or character codes read from the data file 2.
This character code area 333 has a capacity that can store four times as many character codes as the characters that can be displayed on the display 10. That is, it is possible to store twice as many character codes as the characters that can be displayed on one line of the display 10 in the X direction shown in FIG. Then, Y shown in FIG.
It is possible to store twice the number of lines of text that can be displayed on the display 10 in one direction. Here, the character code area 333 includes the N register 331 and the M register 3.
The area allocated for storing character codes changes depending on the storage contents of 32. For example, if N (number of characters for one line of text to be displayed) is stored in N register 331 and M (number of lines of text to be displayed) is stored in M register 332, in character code area 333, Starting from address A, a storage area for N characters is allocated in the X direction, and a storage area for M lines is allocated in the Y direction. When writing character codes into the storage area allocated in this manner, the character codes are written sequentially in the X direction from address A as the starting point. When the input character code reaches the Nth character, writing is performed again from the beginning of the second line. That is, character codes are stored in the character code area 333 in exactly the same layout as the original.

FIGS. 6 and 7 are diagrams showing examples in which sentences inputted based on the manuscript shown in FIG. 1 are displayed on the display 10. Further, FIG. 8 is a flowchart for explaining the operation of the embodiment shown in FIG.

The operation of the embodiment of the present invention will be described below with reference to FIGS. 3 to 8.

First, before displaying the text, press the line length setting key 1.
04a and the line number setting key 104b, the number of characters N (17 characters in FIG. 1) for one line of the text to be displayed and the number of lines M are set, N is stored in the N register 331, and the number M is stored in the M register. It is assumed that M is stored in 332.

Here, the operation when a character code is input from the character key 101 shown in FIG. 4 and characters are displayed on the display 10 in accordance with the input will be described. In this case, a key input from the keyboard 1 is determined in step 1 (abbreviated as S in the illustration) in FIG. It is determined that it is a key. Then, in step 2b, the input character code is written into the character code area 333 and the refresh memory 5. Subsequently, in step 3, the number of input characters is incremented by 1. next,
In step 4, it is determined whether or not the character code has been written to the end of the line in which the character code is currently being written in the storage area of the plurality of lines in the refresh memory 5. In this embodiment, a code meaning a blank space is entered for each character even in a blank area where no characters are displayed, and the character code includes a code meaning such a blank space. If the character code has not been written to the end of the line in the refresh memory 5, the operation of step 5 is performed. In step 5, the number of characters counted in step 3 above is N.
It is determined that the number of characters is smaller than the number of characters N stored in the register 331, and the text is displayed statically in step 6, and the operation in step 1 is performed again.

On the other hand, if it is determined in step 4 described above that character codes have been written to the end of a certain line in the refresh memory 5, no further character codes can be written to that line. Therefore, in step 7, the text to be displayed is scrolled by a predetermined number of characters along the line direction. For example, when characters are displayed sequentially from the left end of the display screen as shown in FIG. 6, this scrolling scrolls the text input so far to the left of the screen.

Here, this scrolling will be explained in more detail. CPU31 is always character code area 3
33 is stored in the refresh memory 5. For example, the display 10 can store character codes for 10 characters in one line, and the refresh memory 5 currently stores 1 character code in the character code area 333.
Assume that the character codes from the 10th character to the 10th character are stored. At this time, the CPU 31
Stop displaying 0 and select 2 in character code area 333.
The character codes from the 11th character to the 11th character are read and the entire contents of the refresh memory 5 are rewritten. That is, at this time, the character codes from the second character to the eleventh character in the character code area 333 are stored in the refresh memory 5. After that, CPU31
turns on the display 10 and displays the text from the second character to the 11th character. After a predetermined period of time, the display on the display 10 is stopped again, and the refresh memory 5 is rewritten with the character codes from the 3rd character to the 12th character in the character code area 333. Then, the display 10 is turned on again. This series of operations is repeated a predetermined number of times (for example, five characters). Because the human eye has an afterimage phenomenon, refresh memory 5
If you rewrite it quickly, it will appear as if the entire displayed text is being scrolled at the same time. Note that the refresh memory 5 may be rewritten during the vertical blanking period of the video signal, and in this case, there is no need to stop the display 10 and the flicker can be completely eliminated.

Next, in step 8 of FIG. 8, the character code stored in the refresh memory 5 is displayed on the display 10.
is displayed statically.

Next, a case will be described in which it is determined in step 5 that the number of characters counted up in step 3 matches N. In this case, the character count is cleared in step 9, and the text displayed on the display 10 is scrolled along the line direction in step 10. This step 10
The scrolling is performed, for example, in the right direction on the display screen shown in FIG. Note that this scrolling operation is performed in the exact opposite manner to the left scrolling in step 7 described above, but since such an operation will be easily understood, its explanation will be omitted. When the scrolling in step 10 is completed, the refresh memory 5 stores the character codes of, for example, the first to tenth characters in the character code area 333, and the display 10 stores the character codes of the first to tenth characters of the original. The text up to is displayed.
Next, in step 11, the cursor mark is returned to the beginning of the next line. As a result, character codes are written into the character code area 333 starting from the first character of the next line.

Next, an explanation will be given of the operation when reading an already created text from the data file 2 and displaying it on the display 10. In this case, the cursor mark is moved to a predetermined character display position using the cursor keys 103a to 103d in order to specify the edit or correction location, but the cursor mark is moved to the beginning of the line or When the cursor is finally moved, a movement command from the cursor key 103c or 103d is processed as a scroll command. That is, in step 2, the cursor key 103c or 1
03d is determined, and the displayed text is scrolled in step 12. In step 12, when the cursor mark is moved to the beginning of the line, the displayed text is scrolled to the right in FIG. 6, for example. Conversely, when the cursor mark is moved to the end of the sentence, for example in FIG. 6, the displayed sentence is scrolled to the left. Next, in step 13, the text is displayed statically, and the operation of step 1 is performed again.

As described above, according to the present invention, in response to the number of characters in one line exceeding a predetermined number of digits during inputting a manuscript, the entire display screen is automatically moved in the line direction and displayed. Because it is
Even if one line of the document is longer than one line of the display screen, the positional relationship between each line is always consistent, and the connection of contexts and the positional relationship of characters between lines can be clearly recognized. Furthermore, since the displayed content is automatically moved, there is no need for an operation to instruct the movement of the displayed content, and the input operation of the original document is not interrupted. Furthermore, according to this invention,
If you want to move the displayed content by manual operation, the displayed content can be moved in the row direction by moving the mark display position to the specified display position, so you can move the displayed content with an extremely simple operation. In addition to being able to move, the mark movement key can also be used as a movement command key for the displayed content.
It is possible to prevent the number of keys on the keyboard from increasing.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a manuscript in which text to be displayed is written. FIG. 2 is a diagram showing the text of FIG. 1 displayed on a conventional display device. FIG. 3 is a block diagram showing one embodiment of the present invention. FIG. 4 is a key arrangement diagram of the keyboard 1 of FIG. 3. FIG. 5 is an illustrative diagram showing the storage area of the RAM 33 shown in FIG. 6 and 7 are diagrams showing sentences such as those shown in FIG. 1 displayed in the embodiment of FIG. 3. FIG. 8 is a flowchart for explaining the operation of the embodiment shown in FIG. In the figure, 1 is a keyboard, 3 is a microprocessor, 10 is a display, 101 is a character key, 1
03a to 103d are cursor keys, 104a
indicates a line length setting key, and 333 indicates a character code area.

Claims (1)

[Scope of Claims] 1. A display device including a display device capable of displaying multiple lines of text, wherein the display screen of the display device has a fixed number of characters that can be displayed in one line, a setting means for setting the number of characters for one line of the manuscript to be displayed on the display; an input means for inputting the manuscript in character order; a storage means for storing the manuscript input from the input means in its original layout; a display drive means for displaying a character stored in the storage means on the display; a mark display means for displaying a mark at an arbitrary position on the display screen; When the number of characters exceeds the number of characters that can be displayed on one line of the display screen,
or a first display control means for controlling the display driving means to move the display contents of the entire display screen in one or the other direction in the row direction when the number of characters set in the setting means is exceeded; , and a first control means for controlling the display device driving means to move the display contents of the entire display screen in one or the other direction in the row direction in response to the display position of the mark reaching a predetermined display position. A display device comprising: 2 display control means. 2. The display device according to claim 1, wherein the first and second display control means move the display content on the display screen by a predetermined character in the row direction.