JPH0486893A - Multiple screen display device - Google Patents

Abstract

PURPOSE:To set the enlarged display state of the multiple screen display device without connecting a system controller by providing an input means for setting the enlarged display state. CONSTITUTION:The input means 6 for setting the enlarged display state is connected to an enlargement control means 3d and the means 6 is used to specify which of eight kinds of input video signal is enlarged and displayed, how large its enlargement rate is, 'color' for coloring the entire CRT screen in the same color, 'still' for stopping a moving picture, and the start or stop of the system. When execution is indicated after the specification, the means 3d controls the writing and reading of a frame memory 3a and the video signal from a selected video signal generator 1 is enlarged and supplied to a display unit group 5 through a video switching means 4.

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) Prior Art Conventionally, projection devices have been used to obtain images on a large screen, but these devices have the drawbacks of being large, increasing costs, and having a dark screen.

Further, as a method of projecting images on a large number of display devices, there is a method disclosed in Japanese Patent Publication No. 50-32009. 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 such as a personal computer, which controls the video signal generator and the video enlarging device described later, and (3) is an arbitrary system controller. It is a video enlarging device that creates an enlarged video signal at an enlargement ratio, and includes a frame memory (3a) corresponding to the number of display devices, a selector (3b) that selects video signals from n number of video signal generators, and the system controller (2). ) and an enlargement control means (3d) that is controlled according to this program and obtains an arbitrary enlargement ratio by controlling reading of the frame memory. device, (4) is the image enlargement device (3);
an enlarged video signal from or the video signal generator (1)
(5) 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 (3d),
This enlargement control means (3d) stores this program in a program memory (3c). Then, the enlarging device is activated and automatically operated by an execution command from the system controller (2).

” When the second program is executed, the enlargement control means (3d
) 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 sends it to the display group (
5).

In this conventional device, operations such as switching magnification and input video signals, as well as instructions to start an automatic driving program, had to be given as commands from the system controller (2). For example, when installing this multi-screen display device in a permanent exhibition hall, even if the magnification ratio is only a fixed display of 4 x 4 and you want to change only the input video signal, the system controller (2) can be used together with the magnification device. It needed to be installed.

Furthermore, there is a drawback in that even if a simple single operation is performed, a complicated command instruction operation is required on the system controller (2).

(c) Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems, and it is an object of the present invention to make it possible to easily set the enlarged display state of a multi-screen display device without connecting a system controller. It is meant to be.

(d) Means for Solving the Problems The present invention provides an enlargement device comprising a plurality of video memories into which the same input video signal is respectively written, and an enlargement control means for controlling writing and reading of the video memories;
In a multi-screen display device that is connected to the magnifying device described in j and is provided with a display group consisting of a plurality of displays that project an enlarged image, an input that is connected to the magnification control means and that sets the magnified display state. We will provide means.

(e) Function The present invention allows the system controller to set the magnification rate, set the video signal to be magnified and displayed among a plurality of input video signals, and start the magnifying device, etc. using the input means for setting the magnified display state. It can be easily done without using it.

(F) Example Hereinafter, one embodiment of the present invention will be explained according to the drawings. Figure 1 shows a block diagram of the system configuration in this embodiment, and the same parts as in Figure 2 are given the same reference numerals and explanations will be omitted. do.

A feature of this embodiment is that input means (6) is provided which is connected to the enlargement control means (3d) and is used to set the enlarged display state.

FIG. 4 shows an embodiment of the input means (6). In this embodiment, it is necessary to determine which video signal out of eight types (A to H) of input video signals is to be enlarged and displayed, the magnification ratio (1x to 8x), and the function to make the entire surface of the CRT the same color.
You can select "Color" or "Still" to freeze the displayed video. You can also specify starting and stopping the system.

When the specification is made in this way and execution is instructed, the enlargement control means (3d) controls writing and reading of the frame memory (3a), and outputs the video signal from the selected video signal generator (1) to a predetermined value. Enlarge with the magnification ratio and display the image switching means (4
), the enlarged image is displayed by supplying it to the display group (5).

FIG. 3 shows another embodiment of the present invention, which differs from the embodiment in FIG. 1 in that it includes a system controller (2) and a program memory (3c). As a result, the execution program for automatic operation is downloaded from the system controller (2) to the enlargement device as before, that is, it is stored in the program memory (3C) via the enlargement control means (3d), and the display is executed according to this program. It also becomes possible.

(g) Effects of the Invention As described above, according to the present invention, it is not necessarily necessary to install a system controller, and input selection and magnification ratio can be easily set, and the effects are great.

[Brief explanation of drawings]

FIG. 1 is a drawing showing one embodiment of the present invention, FIG. 2 is a drawing showing a conventional example, and FIG. 3 is a drawing showing another embodiment of the present invention. (1)...Video signal generator, (3)...Enlargement device (3d)...Enlargement control means, (5)...Display group (6)...Input means

Claims (5)

[Claims] (1) An enlarging device comprising a plurality of video memories into which the same input video signal is written, and an enlargement control means for controlling writing and reading of the video memories; and an enlarging device connected to the enlarging device for displaying an enlarged image. What is claimed is: 1. A multi-screen display device comprising a display group consisting of a plurality of display devices, characterized in that the multi-screen display device is provided with input means connected to the enlargement control means and for setting an enlarged display state. (2) The multi-screen display device according to claim 1, wherein the input means is an input means for setting an image enlargement ratio. (3) The multi-screen display device according to claim 1, wherein the input means is an input means for setting a video signal to be enlarged and displayed among a plurality of input video signals. (4) The multi-screen display device according to claim 1, wherein the input means is an input means for instructing execution of enlarged display. (5) The multi-screen display device according to claim 1, wherein the input means is an input means for instructing to stop enlarged display.