JPH03120585A - Multiscreen display device - Google Patents

Abstract

PURPOSE:To freely set a wipe pattern on a system controller by providing a RAM which stores wiping pattern data corresponding to the wiping action of plural displays in a magnifying device. CONSTITUTION:A wipe direction and a wipe time are set for each monitor and are stored in a wipe pattern data RAM 3d. A wipe executing program is down loaded to a wipe control circuit 3e by the system controller 2. When the system controller 2 executes wiping, the control circuit 3e reads the wipe pattern data from the RAM 3d. A switch control circuit 3h converts the data to plural switch control signals equivalent to the number of monitors and the control circuit 3e controls a switching circuit 3g. Then, the output of a frame memory 3a and that of a video data generating circuit 3f are switched in order, to execute wiping. For the wiping pattern, its data in the RAM 3d can be thereby arbitrarily rewritten when a wipe setting menu is selected by the system controller 2.

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 a high quality image 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, 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 display width, and obtains an image with an arbitrary enlargement ratio by controlling the reading of data stored in the frame memories.

FIG. 3 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. This 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 displays, a program memory (3b) that stores an automatic driving program sent from the system controller (2), and A video enlarging device (4) includes an enlarging control means (3C) that obtains an arbitrary enlargement ratio by controlling reading of the frame memory (3a) controlled according to this program; A video switching means (5) for selecting an enlarged video signal or a same size video signal from the video signal generator (1);
This is a display group consisting of 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), and this expansion control means stores this program in the program memory (3b). Then, the enlarging 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),
The video signal from the video signal generator 5 (1) is enlarged at a predetermined magnification rate and supplied to the display group (5) via the video switching means (4).

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

(c) Problems to be Solved by the Invention However, in the above-mentioned method, the wipe putter :/ is fixed and therefore cannot be changed by the user.

Furthermore, even when the configuration of the monitor changes, a ROM with a large capacity is required to perform a wipe, which increases costs.

Furthermore? When multiple enlargement devices are connected and operated in synchronization, there is a drawback that a smooth wipe cannot be achieved over the entire screen.

(d) Means for Solving the Problems According to the present invention, a RAM for storing wipe pattern data corresponding to wipe operations of a plurality of displays is provided in the enlarging device.

(E) Function The present invention allows the control device to rewrite the wipe pattern data in the RAM and to execute the wipe operation based on the wipe pattern data read from the RAM.

(f) Example An 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 this embodiment, and the same parts as in FIG. 3 are denoted by the same reference numerals and the explanation thereof will be omitted.

The feature of this embodiment is that the enlarged wave ff1 (3) includes a pattern data RAM (3d) that stores wipe pattern data supplied from the system controller (2), and a wipe execution program transferred from the system controller (2). , a wipe control circuit (3e) that controls the pattern data (3d) to execute the wipe, and a video data generation circuit (3e) that generates predetermined video data such as blueback.
f), a switching circuit (3g) that selects and outputs the frame memory (3a) output or the video data generation circuit (3f) output, and a normal control circuit based on the pattern data RAM (3d) output and horizontal and vertical synchronization signals; Create a switching control signal that selects the frame memory output when scanning the part where the video is to be displayed, and selects the video data generation circuit output when scanning the part where the blue screen is to be displayed; A switching control circuit (3h) is provided to supply the switching circuit (3g).

Next, the operation of the device of this embodiment will be explained.

First, a wipe setting menu screen is displayed on the CR7 screen of the system controller (2), and wipe patterns for each monitor are set. That is, the wipe direction and wipe time (time required for wiping) are set for each monitor, and these wipe pattern data are used as the pattern data RA.
Store in M (3d).

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

Then, when the system controller (2) performs a wipe operation, the wipe control circuit (3e) reads wipe pattern data set for each monitor from the RAM (3d). The read wipe pattern data is sent to the switching control circuit (3
h), it is converted into a multiple switching control signal for each number of monitors. The switching control signal controls the switching circuit to sequentially switch the output of the frame memory (3a) and the output of the video data generation circuit (3f) to execute the wipe operation as shown in FIGS.

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

(g) Effects of the Invention As described above, according to the present invention, wipe patterns can be freely set for each monitor on the system controller at any time, so it is possible to change the number of monitors or monitor arrangement, or use multiple enlargement devices. It is easy to handle any situation and can realize a wide variety of wipes.

[Brief explanation of drawings]

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

Claims (1)

[Claims] (1) It includes 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 image memories, and a program memory for storing a program for controlling the enlargement control means. A multi-screen display device comprising an enlarging device, a control device for externally controlling the enlarging device, and a display group connected to the enlarging device and comprising a plurality of displays that display an enlarged image, the enlarging device a RAM for storing wipe pattern data corresponding to a wipe operation of the plurality of displays;
A multi-screen display device, characterized in that wipe pattern data in the RAM can be rewritten by the control device, and a wipe operation is executed based on the wipe pattern data read from the RAM.