JPS62178294A - Screen movement control system for 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 raster-type display device that has a refresh memory and displays display information stored in the memory on a screen, in which the screen display space range is The present invention relates to a screen movement control method for a display device that allows the entire virtual large screen to be displayed by continuously moving the screen by operating a screen movement operation unit such as a screen movement key.

[Conventional technology]

As a conventional screen movement control method for display devices, a configuration has been proposed in which a fixed refresh memory that exceeds the screen display space range is prepared and continuous screen movement is possible only within the refresh memory space range. .

[Problem that the invention seeks to solve]

However, the screen movement control method of the conventional display device described above is configured so that continuous screen movement is possible only within the range of display information stored in the refresh memory. There was a problem in that it was impossible to move the screen continuously.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a screen movement control method for a display device that can continuously display a virtual large screen having an arbitrary space on the screen by operating a screen movement operation unit such as a screen movement key. do.

[Means for solving problems]

In order to achieve the above object, the present invention provides a raster-type display device that displays display information stored in a refresh memory on a screen. A screen display control unit that displays a portion corresponding to the screen display space range of the memory on a screen on a monitor, a virtual large screen memory that stores display information of the virtual large screen, and a refresh memory space range of the virtual large screen memory. a virtual large screen development control section that develops a corresponding portion in the refresh memory; a screen movement operation section that makes a screen movement request; and a screen movement control unit that manages and controls the expansion control unit, and in response to a screen movement request from the screen movement operation unit, moves the virtual large screen that exceeds the range of the limited screen display space to move the entire virtual large screen. can be displayed on the screen.

[Effect]

In this invention, the screen movement control section manages and controls the screen display control section and the virtual screen development control section based on screen movement information obtained by operating a screen movement operation section such as a screen movement key, thereby realizing screen movement. Here, the screen display control unit moves the screen by the refresh memory space of a virtual large screen developed in advance in a refresh memory having a memory space exceeding the screen display space range, and displays the screen on the monitor. The virtual large screen development control unit develops a part of the virtual large screen in the refresh memory in response to a screen movement request outside the refresh memory space range detected in advance by the screen movement control unit, prepares for screen movement, and thereby Achieve continuous screen movement.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In the figure, reference numeral 1 denotes a virtual large screen memory, in which graphic display information of a virtual large screen having an arbitrary display space range is stored in advance.

The graphic display information developed in this virtual large screen memory 1 is developed into the refresh memory 3 as dot information by the virtual large screen development control unit 2 only in the range that can be developed into the refresh memory 3 as a part of the virtual large screen. be done.

The screen display control section 4 reads out the dot information developed in the refresh memory 3 in the range that can be displayed on the display screen of the monitor 5, which is made up of a CRT display, etc., converts it into a video signal, and displays it on the monitor 5. display on the screen.

Here, the relationship between the virtual large screen memory 1, the refresh memory 3, and the virtual large screen display information of the screen on the monitor 5 is selected as shown in FIG.

That is, if the screen display space of the monitor 5 is A5, then the space A3 in the refresh memory 3 for storing dot display information is made about 4.5 times, for example, and the space A3 for storing dot information in the refresh memory 3 is The storage space A1 for storing graphic display information in the large screen memory 1 is selected to be about four times as large, for example. In addition, each space AI.

The area ratio of A3 and A5 is not limited to this, and can be arbitrarily selected as long as the area ratio of each space has a relationship of Al>A3>A5.

The virtual large screen expansion control section 2 and the screen display control section 4 are managed and controlled by a screen movement control section 7 to which a screen movement request from a screen movement key 6 constituting a screen movement operation section is supplied.

This screen movement control section 7 has screen movement keys 6
When the movement information for moving the screen vertically, horizontally, etc. is input, based on this, in response to a screen movement request for the virtual large screen that has already been developed in the dot information display space A3 of the refresh memory 3, Screen movement is controlled by simply notifying screen movement information to the screen display control unit, and in response to a screen movement request for the virtual large screen that has not been developed in the dot display space A3 of the refresh memo I73, the state is It is detected in advance and notified to the virtual large screen development control unit 2, thereby developing new graphic display information on the screen movement request side in the virtual large screen memory 1 to the refresh memory 3 in preparation for the next screen movement request.

Therefore, as shown in FIG. 3, if the refresh memory 3 is composed of 5 x 5 unit memories 3a of two sizes in the screen space A5, the screen movement control unit 7 controls the Based on the screen movement information, the screen display control unit 4 is controlled so that the screen moves on the space A3 of the refresh memory 3.

Then, when the screen movement information attempts to exceed the expansion request space Ar shown in FIG. 3, the screen movement control section 7 controls the virtual large screen expansion control section 2 to refresh the graphic display information in the virtual large screen memory. The portion corresponding to the memory 3 is expanded, and the mapping of the refresh memory 3 is updated.

At the same time, the screen movement control section 7 updates the mapping of the refresh memory 3 to the screen display control section 4 as well.

Next, the operation of the above embodiment will be explained. Now, as shown in solid lines in FIG.
It is assumed that the dot display information developed in the development request space Ar formed by M9, M+□ to M, . . . M17 to MI is displayed on the screen of the monitor 5 by the screen display control unit 4. .

In this state, when screen movement information for moving the screen to the right is generated by selectively pressing the screen movement key 6, this information is input to the screen movement control section 7. Therefore, while the screen movement control section 7 is moving and displaying the dot display information developed in the development request space Ar of the refresh memory 3, as shown in FIG. Screen movement display can be performed on the screen of the monitor 5 by simply changing the read address of the refresh memory 3.
When there is a possibility that the screen movement information exceeds the development request space Ar, the screen movement control section 7 detects this, updates the mapping, and stores the unit memories M, , M located on the left side edge as shown in FIG. ,, Mllll M, 6
．． M, to the right end, expand the graphic display information on the right side of the current graphic display information of the new virtual large screen, and change the mapping of the screen display control unit 4 accordingly to effectively By shifting the expansion request space Ar to the right to create the expansion request space Ar', the graphic display information stored in the virtual large screen memory 1 is continuously and continuously displayed on the screen of the monitor 5 by screen movement. I can do it.

Similarly, when the screen is moved to the left, upward, or downward, the graphic display information in the virtual large screen memory 1 is developed in a unit memory on the opposite side of the movement direction of the refresh memory 3, and the graphic display information in the virtual large screen memory 1 is sequentially moved to the refresh memory 3. By updating the mapping for the refresh memory 3 of the screen display control unit 4, the graphic display information developed in the virtual large screen memory 1 is sequentially and continuously moved onto the screen of the monitor 5. can be displayed.

Next, a second embodiment of the present invention will be described with reference to FIG.

This second embodiment shows an example in which the virtual large screen information is stored in the virtual large screen memory 11 in advance together with the dot display information. The dot display information is configured to be developed in the refresh memory 3 via the virtual large screen mapping control section 12.

Here, in response to a screen movement request that exceeds the expansion request space Ar of the refresh memory 3, the virtual large screen mapping control unit 12 provides virtual large screen mapping only for the unit memory Mi of the refresh memory 3 whose mapping has been updated. It is configured to update the dot information of No. 1.

Therefore, according to the second embodiment, since the graphic display information is stored in the virtual large screen memory 1 as dot information, it is possible to shorten the update time of the refresh memory 3 in response to a screen movement request exceeding the expansion request space Ar. This allows for smoother screen movement.

In each of the above embodiments, a case has been described in which the screen movement key 6 is applied as the screen movement operation unit, but the present invention is not limited to this, and other screen movement operation units such as a joystick may be applied. Of course.

〔Effect of the invention〕

As explained above, according to the present invention, the screen movement in the refresh memory is performed by the screen display control unit, and the screen movement outside the range of display information stored in the refresh memory is The screen movement control unit detects this in advance and controls the virtual large screen development control unit that develops the virtual large screen in the refresh memory to move the screen, so the minimum refresh memory is required. This provides the effect of being able to continuously move around a large virtual screen with any space.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention, and FIG.
The figure is an explanatory diagram showing the size of the virtual large screen memory, refresh memory, and display space of the screen, FIG. 3 is an explanatory diagram showing the configuration of the refresh memory, and FIG. 4 is an explanation for explaining the operation of the first embodiment. Figure 5 is the second figure of this invention.
It is a block diagram showing an example. In the figure, 1 and 11 are virtual large screen memories, 2 and 12 are virtual large screen expansion control units, 3 is a refresh memory, 4 is a screen display control unit, 5 is a monitor, 6 is a screen movement key, and 7 is a screen movement control unit. 12 is a virtual large screen mapping control unit, A1 is a virtual large screen memory display information storage space, A3 is a refresh memory dot display information storage space, A is a screen display space, and Ar is an expansion request space. .

Claims (1)

[Claims] In a raster display device that displays display information stored in a refresh memory on a screen, a refresh memory whose storage capacity exceeds the display space range of the screen and a portion of the refresh memory corresponding to the screen display space range are monitored. A screen display control unit that displays on the upper screen, a virtual large screen memory that stores display information of the virtual large screen, and a virtual large screen that expands a portion of the virtual large screen memory corresponding to the refresh memory space range into the refresh memory. an expansion control unit; a screen movement operation unit that requests screen movement;
a screen movement control section that manages and controls the screen display control section and the virtual large screen development control section in response to a screen movement request from the screen movement operation section; A screen movement control method for a display device, characterized in that the entire virtual large screen can be displayed on the screen by moving a virtual large screen that exceeds the range of a limited screen display space.