JPH04235592A - Display control device - Google Patents

Abstract

PURPOSE:To display outputs of a plural number of computers economically and simply on one display device by storing the picture data of a computer once in a unified memory form and then changing their sizes. CONSTITUTION:The reception forms of the picture data 14, 15 of a plural number of computers 12, 13 are unified once and then stored. After the sizes of the data are changed according to specified picture sizes, a plural number of pictures are synthesized as output picture data and stored thereafter and outputted on a display device 1.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control device, and more particularly to a display control device that synthesizes and displays a plurality of screen data.

0002

2. Description of the Related Art A conventional display control device is provided for each computer and receives a single piece of video data output from the computer.
It simply displayed the received video data on a CRT display device.

0003

[Problems to be Solved by the Invention] The above-mentioned conventional display control device is provided for each computer, and multiple computers require multiple display control devices, so there is a problem that it is economically wasteful. Another problem is that when one person monitors the operations of multiple computers, he or she must view many screens, which is cumbersome.

An object of the present invention is to provide an economical and easy-to-use display control device that displays video outputs from a plurality of computers having different screen sizes on a single display device.

[0005]

[Means for Solving the Problems] A display control device of the present invention is configured to receive video data from the plurality of computers and unify the storage format in a display control device connected to a plurality of computers that output display screens. a plurality of video data conversion circuits that perform conversion, a plurality of input video data storage units that hold outputs of the video data conversion circuits, a plurality of video size registers that hold size data of each of the video data; a plurality of size conversion circuits that enlarge and reduce data in the input video data storage section with reference to size data held in a size register; an output video data storage section that holds the output of the size conversion circuit; This configuration includes a video conversion circuit that accesses a video data storage section and converts it into video data, and a display device that receives the output of the video conversion circuit and displays the video.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The display control device of the present invention has a CRT display device 1 and video data 1 sent from computers 12 and 13.
video data conversion circuits 10, 11 for converting 4, 15 into a unified storage format; and video data conversion circuits 10, 11.
input video data storage units 8 and 9 that hold the output of the video data 14 and 15 sent from the computers 12 and 13, video size registers 4 and 5 that hold the size data 16 and 17 of the video data 14 and 15 sent from the computers 12 and 13, and video size registers 4 and 5 that hold the output video data. The output video data storage section 3 to be held, the video conversion circuit 2 that converts data so that it can be displayed on a CRT display device with reference to the output video data storage section 3, and the video size registers 4 and 5 are referred to. It has size conversion circuits 6 and 7 that expand and compress data in input video data storage units 8 and 9 and write output data to output video data storage unit 3.

Next, the operation of the embodiment of the present invention will be explained. First, the output screen size of the computer 12 is written into the video size register 4 as size data 16. In this state, the video data 14 from the computer 12 is converted by the video data conversion circuit 10 and written into the input video data storage section 8. The size conversion circuit 6 refers to the size data 16, reduces the data in the input video data storage section 8 if it is larger than the screen to be displayed, and enlarges it if it is smaller than the screen to be displayed, and writes it into the output video storage section 3. The video conversion circuit 2 refers to the output video data storage section 3, outputs display data to the CRT display device 1, and displays the data on the CRT display device 1.

[0010] Through a similar process, the video data 15 of the computer 13 is also displayed on the CRT display device 1. As a result,
It becomes possible to combine and display two screen outputs of different sizes on the CRT display device 1.

FIG. 2 is an explanatory diagram for explaining the composition of screen outputs. 2(A) and 2(B) are screens of individual video data of different sizes, and FIGS. 2(C) and 2(D) are explanatory diagrams of screens of output video data synthesized after changing the sizes.

FIG. 2(C) is an example in which two previous screen outputs of different sizes are changed to a screen of the same size and then combined.
"A" is made larger and "E" is made smaller.

FIG. 2D shows an example in which two screen outputs of different sizes are made smaller and combined by changing the value written to the size register.

[0014] In this way, the size can be easily changed by changing the value written to the size register. Furthermore, although this embodiment deals with only size changes, processing such as rotation and black-and-white reversal can also be easily realized by storing input video data as digital data in a memory.

Although this embodiment has been described only in the case where there are two video inputs from the computer to be displayed, it is possible to implement the same method even in the case of three or more video inputs.

[0016]

[Effects of the Invention] As explained above, according to the present invention, the video outputs of computers are stored in a unified storage format, and then the outputs of multiple computers are displayed on one display device by performing size conversion. It has the effect of being economical and easy to display.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining synthesis of screen outputs.

[Explanation of symbols]

1 CRT display device 2 Video conversion circuit 3 Output video data storage units 4, 5 Video size registers 6, 7 Size conversion circuits 8, 9 Input video data storage units 10, 11 Video data conversion circuits 12, 13
Computers 14, 15 Video data 16, 17 Size data

Claims (1)

[Claims] 1. A display control device connected to a plurality of computers that output display screens, comprising a plurality of video data conversion circuits that receive and convert video data from the plurality of computers so as to unify the storage format; a plurality of input video data storage units that hold the output of the video data conversion circuit; a plurality of video size registers that hold size data of each of the video data; a plurality of size conversion circuits that expand and reduce data in a video data storage section; an output video data storage section that holds the output of the size conversion circuit; and an output video data storage section that accesses the output video data storage section to convert data into video data. A display control device comprising: a video conversion circuit that performs conversion; and a display device that receives an output from the video conversion circuit and displays a video.