JPS6221192A - Display unit - 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 [Field of Industrial Application] The present invention relates to a display device, and particularly to a display device used as a character display device of an information processing device such as a word processor or a personal computer.

[Conventional technology]

FIG. 4 is a front view showing a conventional display device. For example, when this display device is used as a display device for a word processor, a ruler line 21 is displayed along the upper side of the display screen 20, and the area below this ruler line 21 becomes a text display area 22. Below this text display area 22, an operation display area 23 with several lines of bones is provided along the lower side of the display screen 20.

When characters are sequentially input and displayed on such a conventional display device through the keyboard of a word processor (not shown), the first line is displayed directly below the ruler line 21 as, for example, "123..." The second line is displayed directly below the first line, for example rABC...'', and the third line is displayed directly below the second line, for example rXYZ...
...'' is displayed. In this way, the input character lines are sequentially displayed on the line immediately below the previous line, and when the display of a large line, for example, the 20th line, is completed, the cursor returns to the beginning of the 20th line and , each displayed line is sequentially scrolled upward one line at a time, and the display of the character line that was on the first line disappears.

[Problem that the invention seeks to solve]

Conventional display devices take the above-mentioned display mode in the character display state, so unless the first line is displayed first, the character line currently being input (hereinafter referred to as the current input character line) The cursor is usually located far away from the ruler line 21, and especially after 19 or more character lines have been displayed, the cursor is almost always on the 20th line, and the cursor is separated from the ruler line 21 and the current input character line. is the most distant state. For this reason, it is almost impossible to intuitively know from the ruler line 21 how many characters have been input into the current input character line, and the problem is that the line of sight must be moved vertically each time to read the number of characters. was there.

For example, in a general typewriter with a display as shown in FIG. 5, a pointer 31 corresponding to a ruler line is provided directly below a paper output port 32 from which type paper 30 corresponding to a text display area is sequentially scrolled and sent out. The characters input from the keyboard section 33 are once displayed on the display 34 corresponding to the operation display area, and then printed on the type paper 30 and printed directly above the pointer 31 as the type paper 30 scrolls. line. In the case of normal printing, the typist prints on the type paper 30 while checking the printing position using the pointer 31 located directly below the current printing line.

However, as described above, in most conventional display devices, the ruler line 21 and the current input character line are located at the farthest position, making it difficult to confirm the number of input characters in the input character line using the ruler line 21. There was a drawback.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device in which the current input character line is displayed directly above a ruler line, as in the case of a general typewriter with a display.

[Means for solving problems]

The display device according to the present invention includes means for displaying a ruler line along the lower side of a text display area on a display screen, and a cursor positioned at the beginning of the bottom line of the text display area located directly above the ruler line. and means to initialize and start displaying the input characters from the bottom line, and means to scroll the character lines displayed in the text display area upward one by one by inputting a return or by auto-return operation. .

[Effect]

In the display device of the present invention, the cursor is normally located on the line immediately above the ruler line, and the character line currently being input is displayed on the line immediately above the ruler line.

〔Example〕

FIG. 1 is a front view of a display device showing one embodiment of the present invention. When the display device of the present embodiment is used as a display device for a word processor, for example, the display device is located directly above the operation display area 3 of several lines provided along the lower side of the display screen 10, that is, the operation display area 3 and the text. A ruler line 1 is displayed between the display area 2 and the display area 2.

The text display area 2 above can display characters in a maximum of 20 rows and 80 columns, and if any display address is (x, y), then the conditions 0≦X<80, 0≦y×20 are satisfied. be satisfied. The position of the display address (0,0) is the upper left corner of the text display area 2, and the address of the beginning of the bottom line where the cursor is initially set is (0,0).
, 19).

FIG. 2 shows the hardware configuration of the display device of this embodiment, in which a cathode ray tube (hereinafter abbreviated as CRT) 11 forming the display screen 10 is equipped with a central processing unit (CRT).
12 (hereinafter abbreviated as CPU) are connected. Further, an input keyboard 13 is connected to the CPU 12, and a display random access memory (hereinafter abbreviated as RAM) 14 for storing text contents is also connected.

On the display RAM 14, a maximum of one text per line
Up to 92 characters can be stored, and this number of characters is different from the maximum number of characters that can be displayed in one line of the text display area 2, which is 80.

For this reason, the offset value 0FFSET is used to indicate the address of the character string to start displaying, and this offset value 0FFSET is displayed on the text display area 2.
The text content displaced in the X direction by FFSET is displayed.

Next, the operation of the display device of this embodiment configured as described above will be explained with reference to the flowchart shown in FIG.

First, when a new character is input through the keyboard 13, the CPU 12 temporarily stores this character in the display RAM 14, and then executes the display subroutine shown in the flowchart of FIG. 3 from the main program in order to display it on the CRT II. Call and move processing to this subroutine. When processing moves to this subroutine, an offset value 0FFS indicating the amount of displacement of the screen display character in the X direction is set.
ET, line counter L indicating the number of lines to be displayed
CNT1 Edit pointer HL indicating the address on display RAM 14 of the character to be displayed, text string pointer m indicating the number of character strings on the text, display column pointer X and display line indicating the display address on text display area 2 A pointer y is passed from the main program to each display subroutine as an argument. In addition,
As can be seen from the explanation of the flowchart in Fig. 3, which will be described later, this display subroutine performs processing such as redisplaying all of the currently input character lines in which a new character is input as a new character is input. It has become.

When entering the display subroutine, first step 5
1, it is determined whether the offset value 0FFSET has been changed, and if it has been changed, the same judgment is made YES (
(Hereinafter, on the flowchart, the yes branch is indicated by Y.)
The process exits at step 52, and the ruler line is updated at step 52. This ruler line update has an offset value of 0FF.
This is a process that changes the scale numbers of ruler line 1 according to SET, and ruler line 1 changes to text display area 2.
Needless to say, if there is no change in the offset value 0FFSET, which is displayed between the offset value 0FFSET and the operator tongue display area 3, the next process will proceed without updating the ruler line.

Next, in step 53, it is determined whether the text string pointer m is equal to or larger than the offset value 0FFSET, and if this determination is no (hereinafter, a no branch is indicated by N on the flowchart), step 54 is performed. The edit pointer HL is incremented by 1, and the text string pointer m is also incremented by l in step 55, and the text string pointer m is set to the offset value 0F in step 53 again.
Return to the determination of whether it is equal to or greater than FSET. The loop that returns to the determination in step 53 has an offset value of 0.
It is provided for locating the beginning of a text string according to FFSET.

If the text string pointer m is equal to or greater than the offset value 0FFSET, the above judgment is passed as YES,
Next, in step 56, it is determined whether the address content (HL) of the edit pointer HL is return (R) or auto return (AR). If it is a return or an auto-return, the process jumps to step 62 (described later); if it is not a return or an auto-return, the character at the address indicated by the edit pointer HL is moved to the position (X, Y> in the text display area 2 in step 57). Next, in step 58, 1 is added to the display column pointer X'', and then in step 59, it is determined whether the display column pointer X has reached the maximum number of characters, 80, that can be displayed in one line. If the maximum number of characters, 80, has not been displayed, the decision is passed as NO, the edit pointer H is moved in steps 60 and 61, and the text string pointer m is incremented, and then the process returns to step 56.
Return to the judgment. When the maximum number of characters is 80,
That is, if there is an unmanaged blank space, when one line of characters including that blank space is displayed, the determination at step 59 is YES and the process proceeds to the next step 62.

In step 62, the display line pointer y is subtracted by 1 and updated to indicate the previous line, and then in step 63 the edit pointer HL is returned by an amount corresponding to the text column pointer m. This causes the edit pointer HL to indicate a return or auto-return at the end of the previous line. Next, in step 64, the edit pointer (IL) is further subtracted by -1, and in step 65, it is determined whether the address content (HL) indicated by the edit pointer HL is a return or an auto-return. If not, the process returns to step 64.

This loop returning to step 64 is for searching for a return or auto-return at the end of the previous line to locate the beginning of the previous line.

If the determination in step 65 is YES, it means that the end of the line before the previous line has been detected, so in step 66 the edit pointer HL is incremented by 1 and the address of the beginning of the previous line is placed in the edit pointer HL. Next, in step 67, the text string pointer m is initialized to 0°, and then the line counter LCNT is decremented by -1. 'IIt, and in step 69 the line counter LC
A determination is made as to whether NT is O°, and if it is “0°,” the display subroutine returns to the main program, and “If it is not 0°, the process returns to step 53 and changes the previous line to the line immediately above. The process of displaying the image is performed.

In this way, the displayed rows are redisplayed one after another to the upper row,
That is, the screen is scrolled upward (in the direction in which y decreases), and when the line counter cNT reaches "0", that is, there are no more displayed lines, the subroutine returns to the main program.

By the way, although I did not specifically specify this in the explanation of the above operation,
Cursor position! (x, y) can be at any position (even if you change the display in any y line by moving the cursor, you can move it upwards from the current input character line by entering a return or by auto-return). Needless to say, the screen scrolls toward the target.

Although the above embodiments show a display device using a CRT, it goes without saying that the present invention can be similarly applied to display devices using other display means such as a liquid crystal display device or a plasma display device. .

〔Effect of the invention〕

As described above, according to the present invention, the ruler line is displayed along the bottom edge of the text display area, and the cursor is initially set to the bottom line of the text display area located directly above the ruler line. Therefore, similar to a general typewriter with a display, a display device is obtained that can easily read how many characters have been input in the current input character line.

Furthermore, since the cursor is located at the bottom row in most cases, a display device is obtained in which there is less need to move the line of sight in the vertical direction.

[Brief explanation of drawings]

FIG. 1 is a front view of a display device showing an embodiment of the present invention, FIG. 2 is a block diagram showing the hardware configuration of the display device shown in FIG. 1, and FIG. FIG. 4 is a front view showing an example of a conventional display device; FIG. 5 is a perspective view showing an example of a typewriter with a display. In the figure, 1... Ruler line, 2... Text display area, 3... Operation display area, 10... Display screen, 11... Cathode ray tube, 12... Central processing unit, 13 . . . Keyboard, 14 . . . RAM for display. Figure 1 Figure 2 Figure 4 Figure 5

Claims (1)

[Scope of Claims] Means for displaying a ruler line along the lower edge of a text display area on a display screen, and initializing a cursor at the beginning of the bottom line of the text display area located directly above the ruler line, The present invention is characterized by comprising means for starting the display of input characters from the bottom line, and means for scrolling the character lines displayed in the text display area upward one line at a time by inputting a return or by performing an auto-return operation. display device.