JPS61250681A - Display controler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] The present invention is designed to move the cursor within a predetermined area within nine display areas when the cursor is instructed to move on one display screen in a word processor or the like, but when the cursor is outside the predetermined area, The company scrolls the screen, and in that case, has a control means that moves the cursor if there is no display data in the direction of movement, so that the screen scrolls with the cursor always placed in an easily visible area on the screen. It is something that can be done.

[Industrial application field]

The present invention relates to a cursor control system on a display screen in Japanese word processors, electronic typewriters, etc., and more particularly to a display control device that can scroll the screen by positioning the cursor on the display screen in an easily visible position.

[Conventional technology]

When displaying an inputted document on the display screen again in a Japanese word processor, etc., it is difficult for the hardware to display one page of the document (for example, one A4 sheet) on the display screen at once. Because it is difficult due to the limitations of
Each page is displayed by displaying a portion of each page on a portion of the display screen (this is called a reduced layout display screen) and changing the display portion on the layout screen. At this time, on the layout screen, each line of the document is scrolled up or down to reveal other parts of the same page.

When performing the scrolling, conventionally, the cursor position indicating the position of the two-document correction is moved to the top or bottom end of the layout screen using the cursor keys, and then the scrolling is performed by continuously operating the cursor keys. Namely.

For example, if you operate the down cursor key to move the cursor position to the bottom edge of the layout screen, and then operate the down cursor key, the line further below the currently displayed area will scroll from the bottom edge of the layout screen. It will appear. The same applies when the upward cursor key is operated.

[The problem that the invention attempts to solve]

When correcting a document on the display screen used in a Japanese word processor such as the one mentioned above, corrections are often made while looking at the context of the displayed document. Corrections are often made by scrolling to a section and then moving the cursor to the position of interest. However, in the case of the conventional cursor control method, the cursor is first moved to the top or bottom of the layout screen using the cursor keys.

Then, use the cursor keys to scroll the document line of interest anywhere on the screen.

It is necessary to move the cursor back to the document position and make corrections, which poses a problem in that the overall operation is difficult.

Means to solve problem c] This invention uses two characters and symbols to eliminate the above problems.

or information storage means (2) for sequentially storing numerical information in the order of input; display means (3) for displaying information stored in an arbitrary storage area on the information storage means (2) on a screen; and the display. When a cursor movement instruction is given when the cursor moves outside the predetermined area on the means (3), the display means (3)
) The information storage means (2) is displayed by
storage area detection means (1) for detecting the direction of movement of the cursor according to the cursor movement instruction and whether or not there is a storage area to be displayed based on the storage area above; When the storage area detecting means (1) detects the moving direction of the cursor and the storage area to be displayed, the display is performed according to the cursor movement instruction without changing the predetermined position of the cursor on the screen. Shifting the storage area on the information storage means (2) to scroll on the screen of the display means (3).

If the storage area detecting means (1) does not detect a storage area to be displayed in the movement direction of the cursor when the cursor is outside the predetermined area, and if the cursor is within the predetermined area, the display is performed. The control means (1) moves the cursor on the screen of the display means (3) in response to the cursor movement instruction without changing the storage area on the information storage means (2). The present invention provides a display control device.

[For production]

In the above means, it is assumed that the contents of a part of the storage area of the information storage means 2, which stores document information such as one character, symbol, or number, are displayed on the screen of the display means 3. Assume that the cursor is placed in any predetermined region 32 of the screen excluding the predetermined region 2, for example, the top and bottom few lines. In this state, the cursor performs normal vertical and horizontal movements. Next, the cursor is outside the predetermined area of the screen, that is, in the middle of the top few lines and the bottom few lines.
1.32. If you instruct the cursor to move upward or downward in this state.

The control means 1 scrolls the screen without changing the position of the cursor. For example, when a downward cursor movement instruction is given, the cursor remains at the boundary of a predetermined area and the document portion on the line further below the currently displayed portion is moved from the corresponding storage area of the information storage means 2. It is read out and appears scrolling from the bottom of the screen. In this case, the storage area detection means 1 detects whether there is a storage area corresponding to the information storage means 2.

If the storage area is detected, the above scroll is performed and the displayed document is at the end of the page, etc. If the storage area is not detected, the cursor is moved, and the cursor position changes to the screen for the first time. Move to the bottom or top end. Namely.

Unless the document to be displayed is at the end or the beginning of a page, the cursor is always placed at an easily visible position on the screen and the screen is scrolled.

〔Example〕

Nine embodiments of the present invention will be described in detail below.

(Configuration of Display Control Device (FIG. 1)) First, FIG. 1 is a configuration diagram of a display control device according to the present invention. Key force from a key force unit (not specifically shown) is input to the display control unit 1. The display control unit 1 is interconnected with a pointer register group 4 (having a display start line pointer 41 and a cursor pointer 42) 5 and a display memory 2,
Further, the display control section 1 is connected to the display section 3.

In the embodiment configured as described above, the display section 3 can first display the contents of the display memory 2. This is a function of the reduced layout screen as part of the normal display. In the case of this embodiment, the layout display capability at this time is as shown in FIG.
All 4 digits can be displayed, and the vertical direction is vertical 6 in display memory 2.
It is assumed that 30 lines out of 0 lines are displayed, and other parts are displayed by scrolling. In this display,
The position you are currently focusing on (the position you want to make corrections, etc.) is
It shall be displayed by the cursor. Next, the cursor pointer 42 is a pointer that indicates the horizontal digit position X of the cursor and the currently focused document line (vertical line position of the cursor) Y, as shown by the broken line in FIG. It takes a value from 1 to 44, and Y takes a value from 1 to 660. The 1-display start line pointer 41 is a register that indicates which line in the display memory 2 is to be displayed as the 1st line on the 9-display unit 3, and its value Y[+ takes a value from 1 to 31. .

(Operation of Display Control Apparatus (FIGS. 1 and 2)) The display operation when the cursor keys are manually operated in the display control apparatus will be explained below using the operation flowchart shown in FIG. Cursor key When human power, that is, data instructing the movement of the cursor, is applied to the display control device 1, the second
Start executing the process shown in the flowchart (Fig. 2 ■)
do. First, the cursor pointers X and Y are updated within the display range corresponding to the cursor movement instruction data (FIG. 2). After updating, the line of the cursor pointer (Y) is within 3 lines from the display start pointer (Yo) (Y-Yo≦3
) (Fig. 2 ■). Within 3 lines (YE
S), the display start pointer (Yo) is below the display start pointer (Yo).
<Yo) (Fig. 2, ■). If the cursor is above the display start pointer (YES), the display start pointer is decremented (■ in Figure 2), the contents of the display memory are displayed from the display start pointer, and the cursor is displayed (■ in Figure 2). ), and the process ends (0 in FIG. 2).

If there is no data above the display start pointer (No) in the above-mentioned determination (■ in Figure 2), it is determined whether data exists in the display memory above the 9 display start pointer (■ in Figure 2).
)do. If there is (existence), the display start pointer is decremented (Fig. 2 ■), and the above-mentioned process is further performed.If there is no data above the 0 display start pointer (Ya), the display start pointer is Execute 1 display process ■ without moving . Incidentally, the above-mentioned decrement of the display start pointer corresponds to scrolling down in improving the display image. By the actions mentioned above.

When the screen is above the third line, the display is scrolled down, or the cursor is moved to the top without scrolling down.

On the other hand, in the 1 determination (■ in FIG. 2), the line is further below the 3 lines below the 1 display start pointer. That is, when Y-Yo≦3 is not satisfied (No), the cursor first moves Y-Y to the 28th line or less in the 9-display.

It is determined whether ≦28 (Fig. 2, ■). Not satisfied (
If the number is within 28 lines, the display remains as is and only the cursor is moved.

Execute the display process (■ in Figure 2) and complete the entire process (@ in Figure 2). In this determination (Fig. 2 ■), Y-Y.

When ≧28 (YES), the cursor will move to 28 on the display.
Since it is below the line, it is determined whether the cursor is within the display by updating the 9th cursor, in other words, Y>Yo
It is determined whether the value is +30 (Fig. 2). y>yo+
If it is 30 (YES), the cursor is past the last line, so increment the display start pointer ■ by one (
(2) in Fig. 2) Furthermore, display processing ((2) in Fig. 2) is performed. Y>Y
If a+30 is not satisfied (No), the cursor is in the bottom three lines of the display screen, so in this case, it is determined whether or not there is data below the 30th line from the display start pointer (Fig. 2, 0). ) exists, the display pointer is incremented (Fig. 2).9 Display processing (Fig. 2 -) is executed and the process ends. If it does not exist, scrolling has no meaning, so the display start pointer is not incremented (the rows on the display screen are scrolled up by incrementing the display start pointer), and only the display process (Fig. 2 ■) is performed and the process ends. do.

The above operation will be further explained with respect to input data.

For example, it is assumed that a portion of the storage area A of the 1-display memory 2 is displayed on the display section 3. Assume that the cursor is located at the 24-line portion 32 in the center of the screen.

In this state, for example, move the cursor up.

As a result, the Y value of the cursor pointer 42 is -1 (the X value remains unchanged) (Fig. 2).

, since the cursor position has not yet reached the upper diagonal line area, the cursor position moves up one position as shown in FIG. Then, the cursor continues to move according to the cursor instruction again and enters the boundary area (third line on the screen) of the diagonally shaded area 31 of one screen (Fig. 2 - ■ - ■). In this state, the display control unit 1 detects whether there is display data above Ya on the display memory 2 (Fig. 2 ■), and if there is, it subtracts the Yo value of the display start line pointer 41 by 1. (
(■ in Figure 2) 2 display is performed (■ in Figure 2 → 0). As a result, on the 9th screen, the cursor position is 3 lines, and the screen scrolls down one screen while remaining on the eye. Subsequently, when the cursor is moved upward, the same scrolling is repeated until the data is no longer above the address Yo on the display memory 2 as shown in FIG. Stop scrolling when there is no more data.

The cursor moves from the 3rd line on the screen to the 2nd line - 1st line 1
(Fig. 2 ■−■−■−■−■−■ → [phase]).

When the cursor reaches the top, the screen scrolls downward again (see Figure 2).
- [Phase])9 Data disappears one line at a time from the bottom on the screen.

Next, suppose that you move the cursor from near the center of the screen to the bottom, contrary to the above. As a result, the Y value of the cursor pointer 42 is incremented by 1, and the process shown in FIG. When the cursor enters the boundary of the diagonally lined area 33 on the screen (the 28th line on the screen), the display control unit 1 detects whether there is display data below Yo+30 on the display memory 2. -■-■-■-■), and in some cases, the Yo value of the display start line pointer 41 is increased by 1 (FIG. 2).

Display (Figure 2 ■-■-@゛). Due to this.

On the screen, the cursor position remains at the 28th line and the 9 screens are scrolled up by one. When the cursor is subsequently moved downward, similar scrolling is repeated until the data is no longer below the address Yo+30 on the display memory 2 in FIG. 2 [phase].

When the data runs out, scrolling is stopped and the cursor moves from line 28 to line 29-30 on the screen (second
Figure ■→■−■→■→■→[phase]−■→@). Then, when the cursor reaches the bottom, the screen scrolls downward again (Figure 2 ■-■-■-■→■→0-■→0)
The data is displayed sequentially one line at a time from the top on one screen.

As described above, when you instruct the cursor to move in the vertical direction, the cursor moves freely in the 24 lines in the center of the screen, and when it reaches the third line from the top or bottom, the cursor moves to that position. The screen scrolls down or up. This allows the screen to be scrolled even if the cursor position does not completely move to the end, making it easier to grasp the context of one document. Further, it is possible to immediately make corrections to the document at the cursor position.

In this embodiment, the part where the cursor can move freely is set to the 24th line in the center, but it may be freely set in that area.

Based on the embodiments described above, it is possible to scroll the screen while keeping the cursor positioned in the center of the screen where it is easy to see, and it is possible to make the context of the document very easy to see around the cursor position.

The above embodiment is an example in which the present invention is applied to a reduced layout screen display of a Japanese word processor, etc.1, but it is of course applicable to a normal screen display, and the cursor is not limited to the use of a cursor to indicate the position of interest. Suka characters,
Symbols, numbers, etc. may be used.Although in this embodiment, an example of nine screens of vertical scrolls has been described, scrolling in the left and right directions of one screen can also be performed in the same manner. In addition.

If left and right or top and bottom margins are set in this embodiment, the cursor can be moved or the screen scrolled within the range of the margins.

〔effect〕

According to the present invention, the screen is scrolled while keeping the cursor position at an easy-to-see position on the display screen, so after scrolling the document line of interest to an easy-to-see position on the display screen, the document is immediately moved from the cursor position. It becomes possible to make corrections, etc.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a display control device according to the present invention. FIG. 2 is an operation flowchart of the display control device. 1...Display control unit 2...Display memory 3...Display unit 4...Pointer register group 41...Display start line pointer 42...Cursor pointer patent Applicant: Casio Computer Co., Ltd. No. 2 Diagram representation 11 Operation of wholesale technical equipment 70-1 Chart procedure amendment (spontaneous) Date of publication: July 1985 Michibe Uga, Commissioner of the Patent Office 1, Incident representation Patent Application No. 92423, 1985 2, Invention title display control device 3, relationship with the case of the person making the amendment Patent applicant's application and specification 5, contents of the amendment (the application is corrected as shown in the attached sheet. (2) The entire specification is corrected as shown in the attached sheet) Description 1, Name Display Control Device of the Invention 2, Claims 1) Information storage means (2) for sequentially storing character, symbol, or numerical information in the order of input; 2) Display means (3) for displaying information stored in any storage area above on a screen, and when a cursor movement instruction is given when the cursor is outside a predetermined area on said display means (3), said display means A memory for detecting the movement direction of the cursor according to the cursor movement instruction and whether or not there is a storage area to be displayed based on the storage area on the information storage means (2) that is being displayed by the means (3). Area detection means (1
), and when the storage area detection means (1) detects the moving direction of the cursor and the storage area to be displayed when the cursor is outside the predetermined area, the predetermined position of the cursor on the screen is not changed. In response to the cursor movement instruction, the storage area on the information storage means (2) to be displayed is shifted and scrolled on the screen of the display means (3), and when the cursor is outside the predetermined area, the the information storage means (2) to display when the storage area detection means (1) does not detect a storage area to be displayed in the moving direction of the cursor and when the cursor is within the predetermined area; A display control device comprising: a control means (1) for moving the cursor on the screen of the display means (3) in response to the cursor movement instruction without changing the upper storage area. 2) The predetermined area on the screen of the display means (3) is an inner part (32) spaced a predetermined number of lines from the top and bottom ends of the screen, and the control means (1)
Claim 1, wherein the direction of the cursor movement instruction when scrolling on the screen of 3) and the direction of scrolling based on the instruction are the up and down directions of the screen of the display means (3). The display control device described. 3) In the display control device, when the storage area detecting means (1) detects a storage area to be displayed in the cursor movement direction according to the cursor movement instruction when the cursor is outside the predetermined area, the storage area has an information detection means (1) for detecting whether or not each information of the character, symbol, or number is stored in the information detection means (1);
), the scrolling is performed when each of the information is detected by the information detection means (1), and the storage area on the information storage means (2) to be displayed is changed when the information is not detected by the information detection means (1). 2. The display control device according to claim 1, further comprising a control means (1) for moving the cursor on the screen of the display means (3) in response to an instruction to move the cursor. 3. Detailed Description of the Invention [Summary] The present invention provides a method for moving a cursor on a two-display screen in a word processor, etc., when the cursor moves within a predetermined area within the two-display area, and when the cursor is outside the predetermined area. In this case, the screen is scrolled while the cursor is always placed in an easily visible area on the screen by having a control means that moves the cursor if there is no display data in the moving direction. It is something that can be done. [Industrial Field of Application] The present invention relates to a cursor control method on a display screen in Japanese word processors, electronic typewriters, etc., and in particular to a display control device that can scroll the screen by positioning the cursor at an easily visible position on the display screen. Regarding. [Prior Art] When displaying an inputted document on the display screen again in a Japanese word processor, etc., one page of the document (for example, one A4 sheet) is displayed on the display screen at once. It is difficult to do so due to hardware limitations, etc.
Each page is displayed by displaying a portion of each page on a portion of the display screen (this is called a reduced layout display screen) and changing the display portion on the layout screen. At this time, on the layout screen, each line of the document is scrolled up or down to reveal other parts of the same page (and when scrolling, the cursor position that previously indicates the position of one document correction) After moving to the top or bottom of the layout screen using the cursor keys, scrolling is performed by continuing to operate the cursor keys.For example, by operating the down cursor key, the cursor position is moved to the top or bottom of the layout screen. If you move it to the bottom edge and use the down cursor key, the line further below the currently displayed part will scroll from the bottom of the layout screen and appear.The same thing will happen if you use the up cursor key. [Problem to be solved by the invention] When correcting a document on a display screen used in a Japanese word processor such as the one described above,9 corrections are often made while looking at the context of the displayed document; Corrections are often made by scrolling the document line of interest to the middle part of both sides of the layout and then moving the cursor to the position of interest.However, in the case of the conventional cursor control method, the cursor is first moved. Use the cursor keys to move to the top or bottom of the layout screen. Then use the cursor keys to scroll the document line of interest anywhere on the screen. Move the cursor back to the document position and make corrections. However, the present invention has the problem that the operation as a whole is difficult. [Means for solving the problem] In order to solve the above problem, the present invention has a problem that a single character, symbol, or number is used. an information storage means (2) for sequentially storing each piece of information in the order of input; a display means (3) for displaying on a screen the information stored in an arbitrary storage area on the information storage means (2); ), when a cursor movement instruction is given when the cursor is outside the predetermined area, the display means (3
) The information storage means (2) is displayed by
storage area detection means (1) for detecting the movement direction of the cursor according to the cursor movement instruction and whether or not there is a storage area to be displayed, with the upper storage area as a reference; If the storage area detecting means (1) detects the moving direction of the cursor and the storage area to be displayed when the cursor is outside the predetermined area, the cursor is moved without changing the predetermined position of the cursor on the screen. In response to the movement instruction, the storage area on the information storage means (2) to be displayed is shifted and scrolled on the screen of the display means (3). If the storage area detecting means (1) does not detect a storage area to be displayed in the movement direction of the cursor when the cursor is outside the predetermined area, and if the cursor is within the predetermined area, the display is performed. The control means (1) moves the cursor on the screen of the display means (3) in response to the cursor movement instruction without changing the storage area on the information storage means (2). The present invention provides a display control device. [Function] In the above means, first, the contents of a storage area of a part of the information storage means 2, which stores document information such as nine characters, symbols, or numbers, are displayed on the screen of the display means 3. do. Assume that the cursor is placed in any predetermined region 32 of the screen excluding the predetermined region 1, for example, the top and bottom few lines. In this state, the cursor performs normal vertical and horizontal movements. Next, the cursor is outside the predetermined area of the screen, that is, in the middle of the top few lines and the bottom few lines.
1.32. If you instruct the cursor to move upward or downward in this state. The control means 1 scrolls the screen without changing the position of the cursor. That is, 1. For example, when a downward cursor movement instruction is given, the cursor is placed on the boundary of a predetermined area and the document portion on the line further below the currently displayed portion is moved from the corresponding storage area of the information storage means 2. It is read out and appears scrolling from the bottom of the screen. In this case, the storage area detection means 1 detects whether there is a storage area corresponding to the information storage means 2. If the storage area is detected, the above-mentioned scrolling is performed and the displayed document is at the end of the page, etc. If the above-mentioned storage area is not detected, the cursor movement is performed, and the cursor position is changed for the first time. moves to the bottom or top of the screen. Namely. Unless the document to be displayed is at the end or the beginning of a page, the cursor is always placed at an easily visible position on the screen and the screen is scrolled. [Examples] Two examples of the present invention will be described in detail below. (Configuration of Display Control Device (FIG. 1)) First, FIG. 1 is a configuration diagram of a display control device according to the present invention. Key force from a key force unit (not specifically shown) is input to the display control unit 1. The display control unit 1 is interconnected with a pointer register group 4 (having a display start line pointer 41 and a cursor pointer 42) and a display memory 2,
Further, the display control section 1 is connected to the display section 3. In the embodiment configured as described above, the first display section 3 can display the contents of the display memory 2. This is a function of the reduced layout screen as part of the normal display. In the case of this embodiment, the layout display capability at this time is that all 44 horizontal digits in the display memory 2 can be displayed in the horizontal direction, and all 60 vertical rows in the display memory 2 can be displayed in the vertical direction. It is assumed that 30 lines are displayed and other parts are displayed by scrolling. In this display, it is assumed that the current position of interest (the position to be corrected, etc.) is displayed by the cursor.Next, the cursor pointer 42 is moved to the horizontal digit of the cursor as shown by the broken line in Figure 1. This is a pointer indicating the position X and the currently focused document line Y (vertical line position of the cursor), where X takes a value from 1 to 44 and Y takes a value from 1 to 60. Furthermore, the 1 display start line pointer 41 is a register that indicates which line in the display memory 2 is to be displayed as the 1st line on the 2nd display section 3, and its value Yo takes a value from 1 to 31. Operation of Display Control Device (FIGS. 1 and 2)) Display operations when the cursor keys are manually operated in the display control device will be explained below using the operation flowchart in FIG. 2.Cursor keys When human power, that is, data instructing the movement of the cursor, is applied to the display control device 1, the second
Start executing the process shown in the flowchart (Fig. 2 ■)
do. First, the cursor pointers X and Y are updated within the display range corresponding to the cursor movement instruction data (FIG. 2). After updating, the line of the cursor pointer (Y) is within 3 lines (Y - Y a) from the display start pointer (Ya).
≦3) (Fig. 2, ■). Within 3 lines (
If it is (YES), it is determined whether it is below the display start pointer (Yo) (Y<Yo) (FIG. 2). If the cursor is above the display start pointer (YES), the display start pointer is decremented (■ in Figure 2),
Then, the contents of the display memory are displayed from the display start pointer, a cursor is displayed (■ in FIG. 2), and the process is ended (@ in FIG. 2). If there is no data above the display start pointer (No) in the above-mentioned determination (■ in Figure 2), it is determined whether data exists in the display memory above the 9 display start pointer (■ in Figure 2).
)do. If it exists, the display start pointer is decremented (■ in FIG. 2), and the above-described processing is further performed. When there is no data above the display start pointer (Yo), the display process 9 is executed without moving the display start pointer. Incidentally, the aforementioned decrement of the display start pointer corresponds to scrolling down on the display screen. By the actions mentioned above. When the screen is above the third line, the display is scrolled down, or the cursor is moved to the top without scrolling down. On the other hand, in the 2 discrimination (■ in FIG. 2), the line is further below the 3 rows below the 2 display start pointer. That is, when Y-Yo≦3 is not satisfied (No), first the cursor is Y-Y below 28 lines in one display. It is determined whether ≦28 (Fig. 2, ■). Not satisfied (
If the number is within 28 lines, the display remains as is and only the cursor is moved. Execute the display process (■ in Figure 2) and complete the entire process (@ in Figure 2). In this discrimination (Fig. 2), Y-Y. When ≧28 (YES), the cursor will move to 28 on the display.
Since it is below the line, the first step is to update the cursor to determine whether the cursor is within the display, in other words, Y>Yo
It is determined whether the value is +30 (Fig. 2). Y>Yo+
If it is 30 (YES), the cursor is past the last line, so increment the 2 display start pointer 0 (
Figure 2 ■). Furthermore, display processing (Fig. 2) is performed. If Y>Yo+30 is not satisfied (No), the cursor is in the bottom three lines of the display screen, so at this time it is three lines from the display start point.
Determine whether data exists below the 0th line (Fig. 2 [phase]). If it exists, increment the display pointer (Fig. 2 ■).9 Display processing (Fig. 2 ■) )
Execute and end the process. Furthermore, if there is no scrolling, the display start pointer is not incremented because scrolling has no meaning (the rows on the display screen are scrolled up by incrementing the display start pointer). Only the display processing (Fig. 2) is performed and the process ends. The above operation will be further explained with respect to input data. For example, assume that a portion of the storage area A of the 2-display memory 2 is displayed on the display section 3. Assume that the cursor is located at the 24-line portion 32 in the center of the screen. In this state, for example, move the cursor up. As a result, the Y value of the cursor pointer 42 is -1 (the X value remains unchanged) (see 10 in FIG. 2). Since the cursor position device has not yet reached the upper diagonal line area, the cursor position moves up one position as shown in FIG. Then, the cursor continues to move according to the cursor instruction again and moves to the boundary area of the diagonally shaded area 31 on one screen (
(3rd line on the screen) (Figure 2 ■-■-■). In this state, the display control unit 1 detects whether there is display data above Yo on the display memory 2 (Fig. 2 ■), and if there is, it subtracts the Yo value of the display start line pointer 41 by 1. (Second
Figure ■) 1 display is performed (Figure 2 ■-@). As a result, on the 9th screen, the cursor position remains at the 3rd line and the screen is scrolled down by one. Subsequently, when the cursor is moved upward, similar scrolling is repeated until the data is no longer above the address YO on the display memory 2 as shown in FIG. Stops scrolling when data runs out,
The cursor moves from the 3rd line to the 2nd line - 1st line on the screen (ffi2[i4■-■-■-■-■-■-@). Then, when the cursor reaches the top end, the screen scrolls downward again (Fig. 2■−■−■−■−■−■−[
Phase]) 9 Data disappears one line at a time from the bottom on the screen. Next, suppose that you move the cursor from near the center of the screen to the bottom, contrary to the above. As a result, the Y value of the cursor pointer 42 is incremented by 1, and the process shown in FIG. 2 is repeated, and the cursor moves downward on the screen. Then, the cursor moves to the boundary of the diagonal line 33 on the screen (28 on the screen).
9), the display control unit 1 stores Ya on the display memory 2.
It is detected whether or not there is display data below +30 (Fig. 2). If there is, the Yo value of the display start line pointer 41 is increased by +1 (Fig. 2). Display (Figure 2 ■-■-〇). Due to this. On the screen, the cursor position remains at the 28th line and the 9 screens are scrolled up by one. When the cursor is subsequently moved downward, the same scrolling is repeated until the data is no longer below address Yo +30 on the display memory 2 in FIG. 2 [phase]. When the data runs out, scrolling stops and the cursor moves from line 28 to line 29-30 on the screen ($2
Figure ■→■−■−■−■−[phase]−■→@). Then, when the cursor reaches the bottom, the screen scrolls downward again (Fig. 2 ■−■→■−■−■→■−■→＠)
5 Data disappears one line at a time from the top on the screen. As described above, when you instruct the cursor to move in the vertical direction, the cursor moves freely in the 24 lines in the center of the screen, and when it reaches the third line from the top or bottom, the cursor moves to that position. The screen scrolls down or up. As a result, the screen can be scrolled even if the cursor position does not completely move to the end, making it easier to grasp the context of the nine documents. Further, it is possible to immediately make corrections to the document at the cursor position. In this embodiment, the part where the cursor can move freely is set to the 24th line in the center, but it may be freely set in that area. Based on the embodiments described above, it is possible to scroll the screen while keeping the cursor positioned in the center of the screen where it is easy to see, and it is possible to make the context of the document very easy to see around the cursor position. The above embodiment is an example in which the present invention is applied to a reduced layout screen display of a Japanese word processor, etc., but it is of course applicable to a normal screen display. zu other characters,
It may be a symbol, number, etc. Further, in the case of the two embodiments, an example of vertical scrolling of one screen has been described, but horizontal scrolling of nine screens can be similarly implemented. In addition. If left and right or top and bottom margins are set in this embodiment, the cursor can be moved or the screen scrolled within the range of the margins. [Effect] According to the present invention, the screen is scrolled while the cursor position is placed at an easily visible position on the display screen, so after scrolling the first document line of interest to an easily viewable position on the display screen, the user can immediately move from the cursor position. It becomes possible to make corrections to the document. 4. Brief Description of the Drawings FIG. 1 is a block diagram of a display control device according to the present invention. FIG. 2 is an operation flowchart of the display control device. ■...Display control section. 2...Display memory. 3...Display section. 4... Pointer register group. 41...Display start line pointer. 42...Cursor pointer.

Claims (1)

[Scope of Claims] 1) Information storage means (2) for sequentially storing information such as letters, symbols, or numbers in the order of input, and information stored in an arbitrary storage area on the information storage means (2). A display means (3) for displaying on a screen, and the information displayed by the display means (3) when a cursor movement instruction is given when the cursor is outside a predetermined area on the display means (3). Storage area detection means (2) for detecting the movement direction of the cursor according to the cursor movement instruction and whether or not there is a storage area to be displayed based on the storage area on the storage means (2);
1), when the storage area detection means (1) detects the movement direction of the cursor and the storage area to be displayed when the cursor is outside the predetermined area, the predetermined position of the cursor on the screen is not changed; the information storage means (2) to display information in response to the cursor movement instruction;
A storage area to be displayed in the moving direction of the cursor by the storage area detection means (1) when the upper storage area is shifted and scrolled on the screen of the display means (3) and the cursor is outside the predetermined area. If the cursor is not detected and the cursor is within the predetermined area, the display unit (3) is moved in response to the cursor movement instruction without changing the storage area on the information storage unit (2) where the display is to be performed. )
A display control device comprising a control means (1) for moving the cursor on the screen. 2) The predetermined area on the screen of the display means (3) is an inner part (32) spaced a predetermined number of lines from the top and bottom ends of the screen, and the control means (1)
Utility model registration claim No. 3) characterized in that the direction of the cursor movement instruction when scrolling on the screen and the direction of scrolling based on the instruction are the up and down directions of the screen of the display means (3). The display control device according to item 1. 3) In the display control device, when the storage area detecting means (1) detects a storage area to be displayed in the cursor movement direction according to the cursor movement instruction when the cursor is outside the predetermined area, the storage area information detecting means (1) for detecting whether each information of the character, symbol, or number is stored in the information detecting means (1);
The information storage means (1) to perform the scrolling when each piece of information is detected by the information storage means (1) and display the information when the information is not detected by the information detection means (1).
2) A utility model registration request characterized in that it has a control means (1) for moving the cursor on the screen of the display means (3) in response to the cursor movement instruction without changing the upper storage area. The display control device according to item 1.