JPH0486894A - Multiple screen display device - Google Patents

Abstract

PURPOSE:To eliminate need for a system controller and to eliminate the need to download an automatic operation program by providing a 2nd program memory in an enlargement device. CONSTITUTION:When an automatic program from the system controller 2 is selected by a switch 7, the automatic operation program is downloaded from the system controller 2 to a 1st program memory 3c and executed. When an automatic operation program which is stored previously in the 2nd program memory 5 is selected by the switch 7, the program head address where the selected program is stored is read out of a 3rd storage means 6 and loaded in the memory 3c, and an enlarged display is made according to the program.

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention displays a predetermined still image or moving image using a large number of display devices, and in particular displays high quality images and a large screen using regularly arranged display devices. The present invention relates to a multi-screen display device capable of displaying multiple screens.

(b) Conventional technology? 7, a projection type projection device is used to obtain images on a large screen, but this device is large, increases cost, and has the disadvantage that the screen is dark.

Further, there is a method disclosed in Japanese Patent Publication No. 50-32009 as a method of displaying images on a large number of display devices. According to this method, one video source can be enlarged and displayed on a large screen on a plurality of display devices by using an enlargement device.

Here, the enlarging device includes, for example, a number of frame memories corresponding to the number of displays, and obtains an image with an arbitrary enlargement ratio by controlling reading of data written in the frame memories.

FIG. 2 shows a block diagram of the system configuration of a conventional multi-screen display device.

In the figure, (1) is a video signal generator such as a VTR or video disc, (2) is a system controller that is a personal computer, etc. and controls the video signal generator (1) and a video enlarging device (described later); ) is a video enlarging device that creates an enlarged video signal at an arbitrary enlargement ratio, and includes a frame memory (3a) corresponding to the number of display devices, and the system controller (3a).
2) a program memory (3b) for storing an automatic driving program sent from the computer; and an enlargement control means (3c) that is controlled according to this program and obtains an arbitrary enlargement ratio by controlling reading of the frame memory. The magnifying device (4) is a display group consisting of 16 CRT monitors.

Next, the operation of the above device will be explained.

First, an automatic driving program is downloaded in advance from the system controller (2) to the expansion control means (3c),
This enlargement control means (3c) stores this program in a program memory (3b). Then, the enlarging device is activated and automatically operated by the system controller (2) or a run execution command.

When the above program is executed, the enlargement control means (3c)
controls the writing and reading of the frame memory (3a), enlarges the video signal from the video signal generator (1) at a predetermined magnification rate, and supplies it to the display group (4).

With this conventional device, the user must first download the automatic driving program from the system controller to the expansion device, and if he wants to run another automatic driving program, he must download it again. There was operational complexity.

(c) Problems to be Solved by the Invention The present invention aims to solve the above-mentioned problems of the prior art.

(d) Means for Solving the Problems Therefore, the present invention provides a plurality of video memories into which the same input video signal is respectively written, an enlargement control means for controlling writing and reading of the video memories, and a control means for controlling the enlargement control means. an enlargement device including a program memory that stores a program to perform the enlargement, a control device that externally controls the enlargement device, and a display group that is connected to the enlargement device and includes a plurality of display devices that display an enlarged image. In the multi-screen display device, a second program memory is provided within the enlargement device.

(E) Function Since the present invention is configured as described above, the automatic driving program can be stored in advance in the second program memory.

(To) Example An example of the present invention will be explained below according to the drawings. Fig. 1 shows a block diagram of the system configuration in this example.
Components that are the same as those in FIG. 2 are given the same reference numerals, and their explanations will be omitted.

In FIG. 1, (5) is the system controller (2
) is a second program memory in which an automatic driving program is stored in advance without being downloaded from the program, and in this embodiment, a plurality of second program memories are provided. (6) is a third storage means capable of storing program start addresses of a plurality of second program memories (5) as shown in FIG.
The second program memory (5) and the third storage means (6) are each constituted by a ROM. (7) selects between the automatic driving program supplied from the system controller (2) and the automatic driving program stored in advance in the second program memory (5), and in the case of the latter, multiple automatic driving programs are provided. Second program memory (5)
This is a switch for specifying an automatic driving program stored in any one of the following.

Next, the operation of this embodiment will be explained.

When the switch (7) is in a state to select the automatic operation program supplied from the system controller (2), the automatic operation program is downloaded from the system controller (2) and stored in the first program memory ( 3c), and thereafter enlarged display is performed according to the automatic driving program.

When the switch (7) is in a state to select an automatic driving program stored in advance in the second program memory (5), the program start address where the selected automatic driving program is stored is stored in the third memory. The automatic operation program is read from the means (6) (power), and the automatic operation program is loaded into the first program memory (3C), and an enlarged display is performed according to this automatic operation program.

This embodiment is a system having a system controller (2), but according to the present invention, the second program memory (
5) Since the automatic driving program is stored in advance,
It goes without saying that automatic operation is possible even without the system controller (2).

(g) Effects of the Invention According to the present invention, it is possible to obtain a multi-screen display device that is easy to use and does not require a system controller and does not require downloading automatic driving programs one by one.

[Brief explanation of the drawing]

FIG. 1 is a drawing showing an embodiment of the present invention, FIG. 21 is a drawing showing a conventional example, and FIG. 3 is a drawing for explaining the relationship between the third storage means and the second program memory. (3a)...Frame memory, (3b)...
Enlargement control means, (3C)...First program memory (4)...Display group, (5)...Second program memory Executor Sanyo Oki Co., Ltd. Agent Patent attorney Nishino Takuji (2 others)

Claims (1)

[Scope of Claims] (1) A plurality of video memories into which the same input video signal is written, an enlargement control means for controlling writing and reading of the video memories, and a program for storing a program for controlling the enlargement control means. a multi-screen display device comprising: a magnifying device having a memory; and a display group comprising a plurality of displays connected to the magnifying device and projecting an enlarged image, wherein the magnifying device includes a second program memory; A multi-screen display device characterized by being provided with. (2) The multi-screen display device according to claim 1, wherein the second program memory is constituted by a ROM. (3) The multi-screen display device according to claim 1, further comprising a plurality of said second program memories.