JPS60103784A - Picture display device - Google Patents

Abstract

PURPOSE:To eliminate a nondisplayed area and to obtain a large-sized picture display by providing a douser so that only each image of a CRT which is arranged in the XY direction will be projected in each display area. CONSTITUTION:Quartered pictures of screens 2a-2d in a small area are composed of plural light source groups 1a-1d, a douser 11 with thin thickness is provided to prevent interruption of the neighboring light to each other. By providing such a douser 11, the screens 2a-2d of each group can be arranged by adhering closely them.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] This invention relates to an image display device having a large display screen.

[Prior art]

Conventionally, this type of equipment includes video glojictors and film projectors that have a display screen of about 1 meter to 2.5 meters, but the larger the display screen, the larger the number of displays. The screen would be dark, so I had to darken the surrounding area to see it. It's 1.

Some cathode ray tubes (CRTs) had a large number of Y arranged to control the displayed image as a whole or individually as a screen, and had a high ability to express a single image. However, since the periphery of the display surface of a CRT is curved, a display device using the CRT has a screen. ! A portion where the image is not displayed is formed at the border between adjacent ICRTs, which is divided into a grid pattern.
[Summary of the Invention] This invention has been made in order to eliminate the drawbacks of the conventional ones as described above, and a plurality of CRTs arranged in the X and Y directions are provided.
The famous image of CRTyrh et al. is projected onto each display area by placing the light-blocked display area on a CRT so that they do not interfere with each other, and thereby eliminating the eyesore within one display screen. An object of the present invention is to provide an image display device capable of displaying a bright large-sized image without a dark non-display area.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a structural diagram showing an embodiment in which four light source groups 1& to 1d are provided and transmission type video glossection is performed. As shown in the figure, the screen has a display area of 0.8 m2 and is divided into four NFC small area screens 2a~
2dρ), and the four light source groups 18 to 1 behind it
A ray of light d is projected. The light sources 1a to 1d are R (also J, G
Consists of a crown tube that emits (green) and B (positive) colors,
A full-color image is displayed on the screens 28 to 2d by combining these R, G, and B color images.

The screens 28 to 2d have a width A at the border between each group.

It has a part 3 where the image is not transparent, that is, a part 3 where the image is not reflected. Width A is formed as one screen is constructed, but it is much smaller than it would be if a cathode ray tube were directly attached to a 7-inch screen. In addition, as shown in FIG. 2, in the conventional device, the periphery of the screen of the cathode ray tubes 4a to 4d is curved to form a convex shape, and a portion 5 where no image is projected is formed.
Because there is.

It was thicker than the 3rd dimension. The embodiment shown in FIG. 1 shows an example of four units consisting of the light groups 1a to 1d.

Of course, the number can be increased or decreased depending on the purpose of display.

FIG. 3 is a side view of the image display device shown in FIG. 1. The image light from the CRT 6 xt forming lights #ta to #1d passes through the reflecting mirror T and is projected onto the screen 8.

Note that it is also possible to connect the image light by directing the image light from the CRT 6 to the screen 8 without using the reflector 7.

FIG. 4 is a rear view of the l1iI+ operation display device shown in FIG. 1. The images on the screens 2a to 2d are based on the number of light source groups 1a.
Since the light shielding plate 11 is formed with a thickness of ~1d, the light shielding plate 11 is provided with a thin thickness in order to prevent mutual interference of adjacent light beams. By providing this shading and 11, the screens 28 to 2d of the group
is placed with @watch.

The light shielding plate shall be made of black thread and has low reflection.

FIG. 5 is a block diagram of an electric circuit constituting the image display device. As shown by symbols 12a to 12d, the projection parts are 1 to 1.
A similar number of video signal generators 13a to 13d are also provided. If you want to display images individually for each of the projection sections 12a to 12d, input the individual display on the operation section 14.
The video signal is sent to each signal generating section 13a to 1 through the control section 15.
The image is transmitted to the three-dimensional projection units 12a to 12d, and the image is displayed on each of them. Inputs from the operating section 14 are also carried out when displaying images, that is, enlarging and projecting one video input screen using all of the four screens 2a to 2d. in this case,
The control unit 15 divides the video signals of video signal generation $13a to 13d selected by the operation unit 14 into video signals for 1/4 screen per group and transmits them to the projection units 12a to 12d. On screens 2a-2d, video No. 46 occurred at 13a-13.
The entire area of the screen that is output from the camera is projected.

It is assumed that the video signal generating units 13a to 13d receive the synchronizing signal from the control unit 15 and broadcast the video at the same timing as each other. '! Ffc, at the same time old voice device 16'&!
Also includes narration. Note that the video signal generator t3
Examples of a to 13b include video tape recorders, video recorders,
desk display equipment, computers, television cameras,
Television broadcasts, etc. are important.

The operating section 14 can instruct the control section 15 to select, start, stop, etc. a video. At 00, projection sections 12a to 12
d, video generation units 13a to 13d and light source groups 1a to 1
Both d and 4 are shown as an example, but the number can be increased or decreased depending on the purpose of expression.

〔Effect of the invention〕

As described above, the Ln of this invention can be used for educational purposes, monitoring purposes, etc. that can be viewed by a large number of people at the same time, and does not require a dark room like a dark room.
It has the effect of allowing you to see the double concave display from 9 to 9.

[Brief explanation of drawings]

FIG. 1 is a structural diagram of an image display device according to an embodiment of the present invention, FIG. 2 is a front-concave view of a conventional image display device, and FIG. 3 is a side view of the image display device shown in FIG. 4 is a rear view of the image display device shown in FIG. 1, and FIG. 5 is a block diagram of the electric circuit of the image display device shown in FIG. 1. 1a to 1d... Genryo group, 2a to 2d... Screen. 5.6...CRT, T...Reflector, 8...Transmission screen IJ-n, 11...Light shielding plate, 12a to 12d.
...Projection section, 13a to 13d...Video signal generation section, 1
4... Operation unit, 15... Control unit. Note that the same reference numerals in Figure 1 indicate the same parts. Patent applicant: Mitsubishi Electric Corporation Figure 1 Figure 3 Figure 4 Figure 1'1 Figure 6

Claims (1)

[Claims] A group of light sources consisting of a plurality of cathode ray tube display devices each displaying +11 images, and a light ray from the optical station.
A hole image display device comprising a screen consisting of a plurality of projection sections that respectively project images, and a control section that controls each of the above-mentioned cathode ray tube display devices and forms a unified image on the screen. (2) The screen is divided into a number of display areas, and is provided with a light-shielding plate that blocks light so that only the corresponding light rays are projected. The image display device described in Section 1.