JPH0441828B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a stroke type display device having a plurality of CRTs used, for example, in computer terminals.

[Technical background of the invention and its problems]

Generally, a stroke type display device is composed of three types of parts as shown in Figure 1, the first of which processes display data received from a computer etc.;
The display processor 1 controls the function generator 2 using the processing results, and the deflection signals X, Y and the video signal VS are generated under the control of the second display processor 1.
The third is a function generator 2 that outputs to a CRT monitor 3, and the third is a CRT monitor 3 that amplifies the deflection signals X, Y and video signal VS output from the function generator 2 and displays them on the CRT.
It is.

Now, when performing different displays on multiple CRTs, conventionally each
Using a display system that independently generates the deflection signals X, Y and video signal VS to the CRT, the above three types of components were combined as shown in FIG. 2.

That is, the display processors 1a to 1
n, function generators 2a to 2n,
CRT monitors 3a to 3n are combined in the same manner as shown in FIG.

In this case, although the display method is simple,
The same number of display processors as the number of CRT monitors,
The disadvantage is that the number of parts increases because a function generator is required.

[Purpose of the invention]

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional art, and it is an object of the present invention to provide a stroke type display device having a small number of parts and having a plurality of CRTs capable of different displays.

[Summary of the invention]

Embodiments of the stroke type display device of the present invention will be described below with reference to the drawings. FIG. 4 is a block diagram showing the configuration of one embodiment. The stroke type display device shown in FIG.
It is composed of CRT monitors 11a to 11n, a display processor 12, a function generator 13, and a video distributor 14. The display processor 12 performs arithmetic processing on display data received from a computer etc. (not shown), and based on the processing results, functions generator 13,
It is designed to output to the video distributor 14,
A video signal VS is output from the function generator 13 to a video distributor 14.

Video signals #1 to #n are sent from the video distributor 14 to the CRT monitors 11a to 11n, respectively, and deflection signals X and Y are sent from the function generator 13 to the CRT monitors 11a to 11n, respectively.
It is designed to be added to the monitors 11a to 11n.

Next, the operation of the stroke type display device of the present invention constructed as described above will be described with reference to the time chart shown in FIG. A display processor 12 performs arithmetic processing on display data received from a computer or the like, and controls a function generator 13 and a video distributor 14 based on the processing results. The function generator 13 receives the deflection signals X, under the control of the display processor 12.
Y is commonly output to each of the CRT monitors 11a to 11n, and a video signal VS is output to the video distributor 14.

A video distributor 14 connects each CRT monitor 1 under the control of a display processor controller 12.
1a to 11n video signals #1 to #n are turned off (video signals not displayed on the CRT display)
or function generator 13
It acts as a switch to switch whether or not to output the video signal VS output from.

The display method is #1 CRT monitor 11a and #2
The following description focuses on the CRT monitor 11b.
Assume that display processor 12 receives the display data shown below.

(1) Diagonally to the upper right from the center of the CRT display
Data for displaying a 45° straight line on #1 CRT monitor 11a (Figure 6a) (2) Data for displaying a circle centered at the center of the CRT display on #1 and #2 CRT monitors 11a and 11b, (3) Diagonally lower right from the center of the CRT display
Data for displaying a 45° dotted line on #2 CRT monitor 11b (Fig. 6b). The display processor 12 processes the above data and outputs the deflection signals X, Y and video signals shown in Fig. 5. The function generator 13 is controlled as follows, and the video distributor 14 is controlled as follows.

(A) During the period shown in FIG. 5, video signal #1 and video signal VS are equal, and video signal #2 is off.

(B) In the period shown in FIG. 5, video signal #1 and video signal VS are equal, and video signal #2 and video signal VS are equal.

(C) During the period shown in FIG. 5, video signal #1 is off, and video signal #2 and video signal VS are equal.

That is, by the operation of the video distributor 14, each
Deflection signals X, Y commonly output to CRT monitor
is valid on a time-sharing basis on each CRT monitor 11a to 11n, so CRT monitor 1 of #1 and #2
1a and 11b can perform different displays.

〔Effect of the invention〕

As described above, according to the stroke type display device of the present invention, the display processor performs arithmetic processing on the display data, and the function generator generates a plurality of data based on the result of the arithmetic processing.
The CRT monitor outputs a deflection signal and the video distributor outputs a video signal, and the video distributor displays this video signal on each CRT display in a time-sharing manner under the control of a display processor. , multiple components with fewer parts
It is possible to perform display with different stroke scans on a CRT, and it is possible to perform a suitable stroke method display when used on a computer terminal or the like.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a conventional stroke type display device, Fig. 2 is a block diagram of a conventional stroke type display device using multiple CRT monitors,
3 is a waveform diagram of a refresh cycle of the stroke type display device shown in FIG. 2, FIG. 4 is a block diagram showing the configuration of an embodiment of the stroke type display device of the present invention, and FIG. 5 is a stroke type display device shown in the same figure. The time charts of the apparatus, FIG. 6a and FIG. 6b, respectively show the display state of the stroke type CRT monitor. 11a to 11n...CRT monitor, 12...Display processor, 13...Function generator, 14...Video distributor.

Claims (1)

[Claims] 1 A plurality of CRT monitors, a display processor that processes display data and outputs control signals, a function generator that outputs deflection signals and video signals under the control of the display processor, and this fan. A stroke system display comprising a video distributor that distributes the video signal output from the compression generator to each CRT monitor under the control of the display processor and displays time-divisionally on each CRT monitor. Device.