JPH0293691A - Display device - Google Patents

Abstract

PURPOSE:To display data at a high speed and to decrease the number of scrolled lines and make an image plane easy to see by scrolling the image plane at a constant period and scrolling the display in a last period at a time or determining the number of scrolled lines according to the size of the image plane. CONSTITUTION:A scrolled line quantity determining means 4 is actuated at intervals of unit time, the number of lines stored in a character code storage means 2 in last unit time is employed as the number of scrolled lines, and a scroll means 5 shifts scrolled lines determined by the scrolled line quantity determining means 4 by shifting the contents of a frame buffer 6 in a character display area. Further, character patterns generated by a character pattern generating means 3 with character codes stored in the character code storage means 2 are written on the frame buffer 6 in an area which is not shift in the character display area and a display means 7 displays the contents. Consequently, overhead accompanying the scrolling operation is reduced and characters are displayed at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scrolling operation of a display device that has a character display section consisting of a plurality of lines and shifts the display one line at a time when the display overflows.

〔overview〕

The present invention is a display device that displays characters on the bottom line and shifts the entire display content upward by one line when the display on the bottom line ends, and scrolls at a constant cycle to summarize the display in the previous cycle. By scrolling or determining the number of lines to be scrolled according to the size of the screen, high-speed display is possible, and the number of lines to be scrolled is reduced to make the screen easier to see.

[Conventional technology]

Conventionally, display devices with this type of scrolling function display characters on the bottom line, and when the display of the bottom line is finished, shift the entire display content upwards by one line, and then display the text on the bottom line again. It is carried out.

[Problem that the invention seeks to solve]

The conventional display device described above performs a scrolling operation in which the entire display content is shifted by one line and rewritten every time one line is displayed, so the processing time spent on the scrolling operation becomes large and this causes problems in display performance. Also, scrolling multiple lines at once has the disadvantage that it is difficult to see if the display is small.

The present invention aims to eliminate such drawbacks and to provide a display device with an easy-to-view screen that reduces overhead associated with scrolling operations and improves display performance.

[Means for solving problems]

A first aspect of the present invention is a frame buffer, a display means for displaying the contents of this frame buffer, an area determining means for determining a character display area consisting of a plurality of lines on the frame buffer, and this area determining means. In a display device equipped with a character code storage means for storing a character code corresponding to a character display area determined in a scroll line number determining means that is activated to determine the number of scroll lines as the number of lines stored in the character code storage means within the immediately preceding unit time; and displaying characters for the number of scroll lines determined by the scroll line number determining means. scrolling means for moving the storage position of the frame buffer within the area and writing a character pattern generated by the character pattern generation means from the character code stored by the character code storage means in an area of the character display area that is not moved; It is characterized by:

A second aspect of the present invention is a frame buffer, a display means for displaying the contents of the frame buffer, an area determining means for determining a character display area consisting of a plurality of lines on the frame buffer, and the area determining means. In a display device comprising character code storage means for storing a character code corresponding to a character display area determined in the above-mentioned area determination step, and character pattern generation means for generating a corresponding character pattern from the stored character code, maximum scroll line number determining means for determining the maximum number of scroll lines from the area of the character display area determined by the means; and maximum scroll line number determination means for determining the maximum scroll line number by the character code storage means; a detection means for detecting that the maximum number of scroll lines has been stored; and a detection means for detecting that the maximum number of scroll lines has been stored; and a scroll line number determining means which, when activated for each unit time, sets the number of scroll lines to be the number of lines stored in the storage means in the immediately preceding unit time, and a scroll line number determined by the scroll line number determining means. The storage position of the frame buffer within the character display area is moved by a few minutes, and a character pattern generated by the character pattern generation means is written from the character code stored by the character code storage means in an area of the character display area that is not moved. The present invention is characterized by comprising a scrolling means for inserting.

[Effect]

In the first aspect of the present invention, the area determining means determines a character display area consisting of a plurality of lines on the frame buffer, and the character code storing means stores a character code corresponding to the character display area determined by the area determining means. , a character pattern generating means generates a corresponding character pattern from the stored character code.

On the other hand, the number of scroll lines determining means is activated every unit time, and the number of lines stored in the character code storage means within the previous unit time is set as the number of scroll lines, and the scrolling means determines the number of lines to be scrolled by the number of scroll lines determining means. The content of the frame buffer in the character display area is shifted by the number of lines and transferred, and the character pattern generated by the character pattern generation unit from the character code stored in the character code storage unit is transferred to the area of the character display area that is not transferred. write to buffer,
A display means displays the content. Thereby, the overhead associated with the scrolling operation can be reduced and display can be performed at high speed.

Further, in the second invention, the area determining means determines a character display area consisting of a plurality of lines on the 7-frame buffer, and the character code storing means stores a character code corresponding to the character display area determined by the area determining means. A character pattern generating means generates a corresponding character pattern from the stored character code.

On the other hand, the maximum number of scroll lines determining means determines the maximum number of scroll lines from the area of the character display area determined by the area determining means, and the detecting means determines the maximum number of scroll lines when the character code stored in the character code storage means is determined by the maximum number of scroll lines determining means. When it is detected that the number of scroll lines exceeds the maximum number of scroll lines determined by the detection means and the scroll line number determination means exceeds the maximum number of scroll lines determined by the detection means, and when the detection means is activated every unit time The maximum number of scroll lines is the number of scroll lines, and when activated every unit time, the number of lines stored by the storage means within the previous unit time is the number of scroll lines. The scroll means shifts and transfers the contents of the frame buffer within the character display area by the number of scroll lines determined by the scroll line number determination means, and the character code storage means stores the content in the area of the character display area that is not moved. The character pattern generated by the character pattern generating means from the character code is written into the frame buffer, and the display means displays the contents.

Thereby, the overhead associated with the scrolling operation can be reduced and display can be performed at high speed, and the number of scroll lines can be reduced to provide an easy-to-read screen.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of the second embodiment of the present invention, and FIG.
FIG. 4 is a diagram showing an example of a screen displayed on a display device according to an embodiment of the present invention, and FIG. 4 is a diagram showing a scrolling operation of a console screen according to an embodiment of the present invention.

(First Embodiment) The first embodiment of the present invention, as shown in FIG. an area determining means 1 for determining a character display area consisting of; a character code storing means 2 for storing a character code corresponding to the character display area determined by the area determining means 1; a character pattern generating means 3 that generates a character pattern; a scroll line number determining means 4 that is activated every unit time and sets the scroll line number to the number of lines stored in the character code storage means 2 within the immediately preceding unit time; The storage position of the frame buffer in the character display area is moved by the number of scroll lines determined by the scroll line number determining means 4, and the character code stored in the character code storage means 2 is transferred to the area in the character display area that is not moved. A scrolling means 5 for writing the character pattern generated by the character pattern generating means 3 is provided.

The display means 7 can display a plurality of screens called multi-windows, and FIG. 3 shows an example of a multi-window display having a console screen 11 and a graphic screen 12. The console screen 11 is a screen to which the embodiment of the present invention is applied, and the number of displayed lines and the number of characters per line vary depending on the screen size.

The area determining means 1 determines the size and display position of the console screen 11, and is positioned on the frame buffer 6 that stores the display contents on the display means 7. The character code storage means 2 stores codes of characters to be displayed on the console screen 11 in correspondence with the console screen 11 on the frame buffer 6.

The character pattern generation means 3 generates a corresponding character pattern from the character code stored in the character code storage means 2. The scroll line number determining means 4 is activated at regular intervals, for example every 500 m5, and sets the number of lines stored in the character code storage means 2 in the previous cycle as the scroll line number.

The scroll means 5 performs scrolling by the number of scroll lines determined by the scroll line number determination means 4, and consists of the following two operations. One is to shift and transfer the contents of the console screen 11 on the frame buffer 6 upward by the number of scroll lines. For example, the console screen 11 consists of 24 lines, and if the current maximum number of scroll lines is 3 lines, the 4th
Referring to the figure, rows 304 to 324 are transferred from row 301 to row 321.

Next, for the area of the console screen 11 that is not transferred, lines 322 to 324 in FIG. 4, the character code storage means 2
A corresponding character code is extracted from the character code, converted into a character pattern by the character pattern generating means 3, and stored.

(Second Embodiment) The second embodiment of the present invention, as shown in FIG. An area determining means 1 for determining a display area, a character code storing means 2 for storing a character code corresponding to the character display area determined by the area determining means 1, and a corresponding character pattern from the stored character code. A character pattern generation means 3 to be generated, a maximum scroll line number determination means 8 for determining the maximum number of scroll lines from the area of the character display area determined by the area determination means 1, and a character code stored in the character code storage means 2. a detection means 9 for detecting that storage has exceeded the maximum number of scroll lines determined by the maximum number of scroll lines determining means 8; and a detection means activated when the maximum number of scroll lines has been exceeded by the detection means 9 and for each unit time. 9, the maximum number of scroll lines is the number of scroll lines, and when it is started every unit time, the number of lines stored in the character code storage means 2 within the previous unit time is the number of scroll lines. The number of lines determining means 10 and the character code storing means 2 move the storage position of the frame buffer within the character display area by the number of scroll lines determined by the scroll line number determining means 10 and move the storage position of the frame buffer in the character display area to an area where the frame buffer is not moved. The scrolling means 5 writes the character pattern generated by the character pattern generation means 3 from the character code stored in the character code.

In the second embodiment of the present invention, the display means 7 displays a plurality of screens called a multi-window. FIG. 3 shows an example of a multi-window display having a console screen 11 and a graphic screen 12. The console screen 11 is a screen to which the embodiment of the present invention is applied, and the number of displayed lines and the number of characters per line vary depending on the screen size.

The area determining means 1 determines the size and display position of the console screen 11, and is positioned on the frame buffer 6 that stores the display contents on the display means 7. The character code storage means 2 stores codes of characters to be displayed on the console screen 11 in correspondence with the console screen 11 on the frame buffer 6.

The character pattern generation means 3 generates a corresponding character pattern from the character code stored in the character code storage means 2.

The maximum scroll line number determining means 8 is a console screen 11
Determines the maximum number of lines to scroll when scrolling. The maximum value of the number of scroll lines is determined in proportion to the area of the console screen 11 determined by the area determining means 1. This operation is the main technology of the present invention; on a small console screen 11, it is difficult to see when there are many lines to scroll at once;
This is an improvement over the inability to provide high-performance display by scrolling line by line in 1.

The detection means 9 detects whether character codes are stored in excess of the maximum number of scroll lines when storing them in the character code storage means 2 so as not to exceed the maximum number of scroll lines determined by the maximum number of scroll lines determining means 8. . The number of scroll lines determining means 10 is activated at a fixed period, for example, every 500 m5, or when the maximum number of scroll lines is exceeded in the detection means 9, and is activated to determine the number of scroll lines when the console screen 11 is scrolled. do.

That is, when activated by the detection means 9, the maximum number of scroll lines becomes the number of scroll lines, and when activated at regular intervals, the number of lines stored in the character code storage means 2 in the previous cycle is scrolled. Number of lines.

The scroll means 5 performs scrolling by the number of scroll lines determined by the scroll line number determination means 10, and consists of the following two operations. One is to shift and transfer the contents of the console screen 11 on the frame buffer 6 upward by the number of scroll lines. For example, console screen 11 is 24
If the current maximum number of scroll lines is three lines, referring to FIG. 4, move lines 304 to 324 from line 301 to line 321.

Next, for the area of the console screen 11 that is not transferred, lines 322 to 324 in FIG. 4, the character code storage means 2
A corresponding character code is extracted from the character code, converted into a character pattern by the character pattern generating means 3, and stored.

〔Effect of the invention〕

As explained above, according to the present invention, by scrolling at a constant cycle and scrolling the display in the previous cycle all at once, or by determining the number of lines to be scrolled in accordance with the screen size, it is possible to This has the effect of reducing the overhead associated with scrolling and allowing high-speed display, and for small screens, reducing the number of scroll lines to provide an easy-to-read screen.

4. r! ! Brief explanation of J side FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a second embodiment of the present invention.

FIG. 3 is a diagram showing an example of a screen displayed on a display device according to an embodiment of the present invention.

FIG. 4 is a diagram showing the scrolling operation of the console screen according to the embodiment of the present invention.

1... Area determination means, 2... Character code storage means,
3...Character pattern generation means, 4.10...Scroll line number determining means, 5...Scrolling means, 6...
Frame buffer, 7...Display means, 8...Maximum scroll determining means, 9...Detection means, 11...Console screen, 12...Graphic screen.

Claims (1)

[Claims] 1. A frame buffer, a display means for displaying the contents of the frame buffer, an area determining means for determining a character display area consisting of a plurality of lines on the frame buffer, and the area determining means In a display device comprising a character code storage means for storing a character code corresponding to a determined character display area, and a character pattern generation means for generating a corresponding character pattern from the stored character code, a scroll line number determining means that is activated and sets the number of scroll lines to be the number of lines stored in the character code storage means within the previous unit time; and a character display area equal to the number of scroll lines determined by the scroll line number determining means. scrolling means for moving the storage position of the frame buffer in the character display area and writing a character pattern generated by the character pattern generation means from the character code stored in the character code storage means in an area of the character display area that is not moved. A display device characterized by: 2. A frame buffer, a display means for displaying the contents of the frame buffer, an area determining means for determining a character display area consisting of a plurality of lines on the frame buffer, and a character display area determined by the area determining means. A display device comprising: character code storage means for storing a character code corresponding to a character code; and character pattern generation means for generating a corresponding character pattern from the stored character code; maximum number of scroll lines determining means for determining the maximum number of scroll lines from the area of the area; and character codes stored by the character code storage means exceeding the maximum number of scroll lines determined by the maximum number of scroll lines determining means. a detection means for detecting the number of lines to be scrolled, and a detection means that is activated when the maximum number of scroll lines is exceeded by this detection means and for each unit time; Scroll line number determining means that determines the number of scroll lines as the number of lines stored by the storage means in the immediately preceding unit time; scrolling means for moving the storage position of the frame buffer of the frame buffer and writing a character pattern generated by the character pattern generation means from the character code stored in the character code storage means in an area of the character display area that is not moved. A display position featuring: