JPH0675231B2 - Multi-screen display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is designed to display a predetermined still image or moving image on a large number of display devices, and in particular, a regularly arranged display device provides high image quality and a large screen. The invention relates to a multi-screen display device.

(B) Conventional Technology Conventionally, there is a projection type projection device for obtaining a large screen image, but this has a drawback that the device is large, the cost is increased, and the screen is dark.

Also, as a method of displaying an image on a large number of display devices,
There is one shown in Japanese Patent Publication No. 50-32009. According to this method
By using a magnifying device, one video source can be magnified and a large screen can be displayed on a plurality of display devices.

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

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

In the figure, (1) is a video signal generator including a VTR or a video disk, (2) is a system controller including a personal computer or the like for controlling the video signal generator and a video enlarging device described later, and (3) is an arbitrary An image enlarging device for producing an enlarged image signal at an enlargement ratio, including a frame memory (3a) corresponding to the number of display devices, a program memory (3b) for storing an automatic operation program sent from the system controller (2), and An image enlarging device provided with an enlarging control means (3c) which is controlled according to this program and obtains an arbitrary enlarging ratio by controlling reading of the frame memory (3a), and (4) is an enlarging device from the image enlarging device (3). A video switching means for selecting a video signal or the same size video signal from the video signal generator (1), and (5) is a display group consisting of 16 CRT monitors.

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

First, an automatic operation program is previously downloaded from the system controller (2) to the expansion control means (3c), and this expansion control means stores this program in the program memory (3b). Then, the magnifying device (3) is activated and automatically operated by an execution command from the system controller (2).

When the above program is executed, the enlargement control means (3c) controls writing and reading of the frame memory (3a), enlarges the video signal from the video signal generator (1) at a predetermined enlargement ratio, and switches the video. Supply to the display group (5) through the means (4).

Here, enlargement device (3) and system controller (2)
When either one of the power supplies is cut off and the operation is interrupted, it is necessary to initialize both of them in order to restore the system.

Further, when a plurality of magnifying devices (3) and a plurality of display units (5) are connected to each other and one system controller (2) performs a synchronous operation, for example, the operation of only one magnifying device is interrupted. At this time, it was necessary to initialize all the magnifying devices in order to restore them because it was not known which magnifying device was interrupted.

(C) Problems to be Solved by the Invention The present invention has been made in view of the above points, and when an abnormality such as power interruption occurs in a part of the system, the system can be restored by an optimal method. The present invention provides a multi-screen display device that can be used.

(D) Means for Solving the Problems The present invention is provided with a memory for storing data relating to the operating status of the magnifying device and / or the identification information of the program in the magnifying device.

(E) Action In the present invention, the type or operating status of the program is confirmed by reading the data stored in the memory at appropriate times.

(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of the system configuration in the present embodiment. The same parts as those in FIG.

The feature of this embodiment resides in that an operating condition memory (3d) for storing data concerning the operating condition of the expanding device and the identification information of the program is provided in the expanding device (3 ').

In this embodiment, a plurality of magnifying device image switching means and a group of display devices are provided. One of the magnifying devices is used as a master and the other is used as a slave, which are operated in synchronization.

Next, the operation of the apparatus of this embodiment will be described.

First, the system controller (2) downloads the execution program for automatic operation to the expansion device, that is, stores it in the program memory (3b) via the expansion control means (3c). At this time, identification information relating to the downloaded programs at the same time, for example, data such as the program name is written in the operation status memory (3d). Next, when an execution instruction is sent to the expansion device (3 ') on the master side, the program is executed in synchronization with the slave side.

When the above program is executed, the enlargement control means (3c) controls writing and reading of the frame memory (3a), enlarges the video signal from the video signal generator (1) at a predetermined enlargement ratio, and switches the video. Output to the means (4). The image switching means (4) selects the image signal from the image signal generator (1) when displaying a normal size image and the image signal from the frame memory (3a) when displaying an enlarged image. And supply it to the display group (5).

On the other hand, the enlargement control means (3c) writes in the operation status memory (3d) the current operation status, that is, whether the program is being executed, stopped, or waiting for execution.

Therefore, the system controller (2) can know the currently effective processing (for example, stop processing if the program is being executed, execution or program download processing if the program is being executed) by knowing the operation status of each expansion device.

Then, when the enlargement device, which is the cause of power failure or the like, is reset and the program is interrupted, the system controller (2) checks the data in the respective operation status memories (3d) and (3d). As a result, since the program identification information is not written in the operation status memory of the reset expansion device, the system controller (2) initializes only the reset expansion device and downloads the program. The system can be brought back up.

Further, when the program is downloaded, the program identification information is read from the operation status memory, and if the same program is already stored, the download can be omitted.

Furthermore, when using a personal computer as the system controller,
When the magnifying apparatus is used for another purpose after being controlled and the magnifying apparatus is controlled again, the operation status can be known by reading the operation status memory.

(G) Effect of the Invention As described above, according to the present invention, the system controller can know the current effective processing by confirming the current operation status, and can perform optimum system control.

In addition, if an abnormality such as power-off occurs in a part of the system, the system controller needs to initialize only the reset expansion device among the multiple devices by checking the program identification information. Can be restored.

[Brief description of drawings]

FIG. 1 is a block diagram showing the system configuration of a multi-screen display device in one embodiment of the present invention, and FIG. 2 is a block diagram showing the system configuration of a conventional device. (1) ... Video signal generator, (2) ... System controller, (3) (3 ') ... Enlargement device, (3d) ... Operation status memory, (5) ... Display group.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Nobuo Kuchiki 2-18 Keihan Hon-dori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Tamiko Hirose 2-18 Keihan-hondori, Moriguchi-shi, Osaka Sanyo Denki (72) Inventor Motoki Shirato 2-18, Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kiyoji Matsumoto 2--18, Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Atsushi Niwa 2-18, Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A plurality of video memories to which the same input video signal is respectively written, enlargement control means for controlling writing and reading of the video memories, and a program memory for storing a program for controlling the enlargement control means. A multi-screen display device comprising: a magnifying device provided; a control device for controlling the magnifying device from the outside; and a display group including a plurality of display devices connected to the magnifying device and displaying magnified images. A multi-screen display device, wherein a memory for storing data relating to the operating status of the enlargement device and / or identification information of the program is provided in the device. 2. A multi-screen display device according to claim 1, wherein a plurality of the magnifying devices and the display unit group are provided, and these are operated in synchronization.