JPH0675232B2 - 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. 3 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 personal computer or the like and is a system controller 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) for obtaining an arbitrary enlarging ratio by controlling the reading of the frame memory (3a) controlled according to this program, and (4) is an image enlarging device (3). An image switching means for selecting an enlarged image signal or the same size image signal from the image 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, the automatic operation program is downloaded from the system controller (2) to the expansion control means (3c) in advance,
This enlargement 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).

In the above-mentioned device, when switching the video data supplied to each monitor from A to B, for example, when a so-called "wipe" is performed in which the boundary line moves in a predetermined direction at a predetermined speed, a ROM is conventionally provided in the enlargement device. A wipe pattern data for each monitor is stored in this ROM and is read to realize the wipe.

(C) Problem to be Solved by the Invention However, the above method has a drawback that the wipe pattern is fixed and cannot be changed by the user.

In addition, a ROM with a large capacity is required to realize the wipe even when the configuration of the monitor changes, resulting in an increase in cost.

Further, when a plurality of magnifying devices are connected for synchronous operation, there is a drawback that a smooth wipe cannot be realized over the entire screen.

(D) Means for Solving the Problems The present invention is provided with a RAM for storing wipe pattern data corresponding to a wipe operation in a plurality of display periods in the enlarging device.

(E) Operation In the present invention, the control device rewrites the wipe pattern data of the RAM, and the wipe operation is executed based on the wipe pattern data read from the RAM.

(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 is that, in the enlarging device (3), a pattern data RAM (3d) for storing wipe pattern data supplied from the system controller (2) and a wipe execution program transferred from the system controller (2) are used. A wipe control circuit (3e) that controls the pattern data (3d) to execute a wipe, a video data generation circuit (3f) that generates predetermined video data, such as blue background, the frame memory (3a) output or video data generation. A switching circuit (3g) for selecting and outputting the output of the circuit (3f) and the frame memory when scanning a portion where a normal image should be projected based on the output of the pattern data RAM (3d) and horizontal and vertical synchronizing signals. When the output is selected and the portion where the blue back is to be displayed is scanned, a switching control signal is generated to select the output of the video data generation circuit. A switching control circuit (3h) is provided to supply the switching circuit (3g) to the switching circuit (3g).

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

First, the wipe setting menu screen is displayed on the CRT screen of the system controller (2), and the wipe pattern of each monitor is set. That is, the wipe direction and the wipe time (time required for the wipe) are set for each monitor, and these wipe pattern data are stored in the pattern data RAM (3
Remember in d).

Further, the wipe execution program is downloaded from the system controller (2) to the wipe control circuit (3e).

When the system controller (2) performs a wipe operation, the wipe control circuit (3e) reads out the wipe pattern data set for each monitor from the RAM (3d). The read wipe pattern data is converted into a plurality of switching control signals for each monitor number by the switching control circuit (3h). The switching control signal controls the switching circuit to sequentially switch between the frame memory (3a) output and the video data generation circuit (3f) output,
A wipe operation as shown in FIGS. 2A to 2G is executed.

And the wipe pattern is the system controller (2)
By selecting the wipe setting menu with, the wipe pattern data in RAM (3d) can be rewritten arbitrarily.

(G) Effect of the Invention As described above, according to the present invention, since the wipe pattern can be freely set for each monitor on the system controller at any time, the number of monitors and the monitor arrangement are changed, and a plurality of enlargement devices are used. Even in the case, it can be easily handled and various wipes can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a system configuration of a multi-screen display device in one embodiment of the present invention, FIG. 2 is a diagram showing a wipe operation, and FIG. 3 is a block diagram showing a system configuration of a conventional device. (1) ... Video signal generator, (2) ... System controller, (3) ... Enlargement device, (3a) ... Frame memory, (3
d) ... Pattern data RAM, (3e) ... Wipe control circuit,
(3f) ... video data generation circuit, (3g) ... switching circuit, (3
h) ... Switching control circuit, (5) ... Display group.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Ueyama 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Innovator Mitsunobu Enomoto 2-18-2 Keihanhondori, Moriguchi, Osaka Sanyo Electric Incorporated (72) Inventor Tamiko Hirose 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kiyoji Matsumoto 2-18-2 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A plurality of video memories to which the same input video signal is written, a magnifying control means for controlling writing and reading of the video memories, and a program memory for storing a program for controlling the magnifying control means. In a multi-screen display device, comprising: a magnifying device including; a control device that controls the magnifying device from the outside; and a display unit group that is connected to the magnifying device and that displays a magnified image. A RAM for storing wipe pattern data corresponding to the wipe operation of the plurality of displays is provided in the enlarging device, and the wipe pattern data of the RAM can be rewritten by the control device and the wipe pattern data read from the RAM. A multi-screen display device characterized by executing a wipe operation based on the above.