JPS6291926A - Double televising system of projected image - Google Patents

Abstract

PURPOSE:To make plural viewers watch selectively desired pictures individually simultaneously by televising pictures of two programs on one stereo screen through polarization in time division and allowing each viewer to select and put on polarizing glasses corresponding to the direction of polarization of desired pictures. CONSTITUTION:A light 12 from a light source 11 provided in the rear part of a projection TV is transmitted through an image forming face 5 and a polarization converter 10 to project pictures of two programs, whose polarizations are converted by 90 deg. in time division, on a known stereo screen 13, where the polarization of even a reflected light is held, alternately in time division in an after image holding time. Viewers 15, 15-put on polarizing glasses 16 and use their polarizing filters 17 to watch selectively pictures on the stereo screen 13 by a light 18 reflected from the stereo screen 13.

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is capable of displaying two images on the same screen using one or two image display devices, such as a direct viewing type or a projection type. This invention belongs to the technical field of a dual projection image display system that allows a plurality of viewers to view their desired programs independently of each other on the same screen even though they are simultaneously broadcast.

Summary of the gist> Therefore, the invention of this application provides a system for multiple viewers to
Alternatively, two images are simultaneously projected onto the same screen using two projectors, so that each of the large number of viewers can selectively view the desired program individually. This invention relates to a system for displaying a projected image twice, and in particular, it is a system for projecting two different images onto a stereo screen using a single projector using polarized light that differs by 90 degrees within an extremely short period of time within the afterimage retention time. Although it is impossible to distinguish the images on the screen with the naked eye by broadcasting the same screen in the same cycle sequentially and at the same time,
A plurality of viewers select a channel using polarized glasses that match the polarization of the broadcast image that changes in a time-division manner, and the plurality of viewers selectively watch two programs individually and simultaneously on the same entire screen at the same time. Alternatively, two image projectors can simultaneously broadcast two images on one stereo screen with 90' different polarizations and select polarizing filter glasses with polarization angles that match the desired image. This invention relates to a double projection system for projecting images, which allows a plurality of viewers to simultaneously and selectively listen to the entire screen on the same screen.

<Prior Art> As is well known, televisions have become widespread not only as entertainment equipment but also as an important means of information transmission.

Of these, projection televisions are increasingly being used because of their advantages, such as the ability to project onto a large screen and provide viewing to a large number of viewers.

However, in general, conventional projection television broadcasting systems only show one program at a time on one screen, and therefore, multiple or large numbers of viewers, such as two or three people, can view one program at a time. 1 at a time by screen device
When viewing two programs at the same time, it functions extremely effectively as an information transmission medium.

However, as mentioned above, one projection television broadcasting system in the United States has only one screen and can only broadcast one program at a time, so it cannot be used as a multi-system that broadcasts multiple programs and different information at the same time. It is something that is not utilized.

<Problem to be solved by the invention> Therefore, in order to broadcast two programs or images of different information at the same time, two large screens must be set in one or two locations. Naturally, this method has the disadvantages of requiring a large space, two facilities, and a large amount of expense, and has the disadvantage that it is often impossible to implement except in special cases.

To deal with this, it is possible to install a system in which the opposite program image @2 is simultaneously displayed on one corner of one screen of one projection television and then broadcast on the large screen 3, as shown in Fig. 7. However, in this system, when a viewer wants to watch a desired program, other programs often catch his/her attention and the viewer is distracted and cannot watch the desired program for a long time.

Recently, there has been a demand for TV broadcasts on large screens, and as shown in Figure 8, the large screen is divided into multiple screens 3', 3', etc., and several programs are shown simultaneously. A system is not unthinkable, but for the viewer, the large screen 3 cannot be fully utilized and each screen 3' becomes smaller, and unnecessary screens are included in the field of view, causing mouth fatigue. The problem is that it is difficult to watch smoothly in reality.

The object of the invention of this application is to independently select images of two desired programs for a plurality of viewers at the same time by using one large screen based on the above-mentioned prior art, and moreover, The problem of not being able to view images because of this is a technical issue that needs to be solved, and we can deal with this by broadcasting two images at the same time using only one large screen, that is, one screen. A collapsed projection image that benefits the field of multi-system technology application in the information industry by allowing a plurality of viewers to view a desired image on the entire surface of the same large screen at the same time, independently of each other. The market is designed to provide a dual broadcast system.

<Means/effects for solving the problem> In accordance with the above-mentioned purpose, the invention of this application, which is summarized in the claims of the above-mentioned patent, is to solve the above-mentioned problem. The two images are broadcasted sequentially in a time-sharing manner using polarized light in the same cycle within the afterimage retention time, and the two images are essentially simultaneously broadcast on the same screen, at which time a polarizing plate is provided on the projection device. The direction of polarization changes depending on the program, and on the viewer's side, the direction of polarization changes. ! By selecting and wearing polarized glasses that match the polarization direction of the desired image, a plurality of viewers can simultaneously view their desired images individually and selectively substantially simultaneously on the entire screen of one screen. Technical measures have been taken to make this possible.

<Example> Next, an example of the invention of this application will be described below based on FIGS. 1 to 6.

4 is a projection television as a liquid crystal projection image device that has been developed to a level where it can be put to practical use, and its image forming surface 5 is in front of a liquid crystal 6, as shown in FIG. A transparent electrode 9.9 is attached which is electrically connected to an image creation control device 8 connected to a power source 7, and the image creation side (11) allows the image creation side (11) to generate images in a very short time within the afterimage retention time range as shown in FIG. ), the images of two programs @AB are AB, AS
. . . images are created in a time-division manner.

Immediately, a projection television 4 is placed in front of the image forming surface 5.
A polarization conversion device 10 is provided in front of the liquid crystal 6.
By controllingly applying voltage from the image creation control device 8 to the image forming surface 5 in synchronization with image formation,
The polarization plane of the transmitted light is controlled to be rotated by 90' or not to be rotated.

In this way, the light 12 from the light source 11 provided on the inside of the projection television 4 is transmitted through the image forming surface 5 and the polarization conversion device 10, so that the well-known reflected light also maintains its polarization. Polarized light is transmitted 90' on the stereo screen 13 in a time-division manner.
Images of two mutually converted programs are created alternately in hours and minutes vj within an afterimage holding time.

Then, there are a set number of sheets 14.14...
By wearing polarized glasses 16 and using their polarizing filters 11, viewers 15, 15, seated at , can selectively view images on the stereo screen 13 using the light 18 reflected from the stereo screen 13. Also, the sound can be heard by inserting the earphone 19 into the jack of the seat 14 provided in the image forming device 1iIIIl device 8 via the lead gland 20. In this case, the polarizing filter of the polarizing glasses 16 can be used. 17 is set at a polarization angle that matches each program, and the sheet 14 has a pair of polarized glasses 16 and 16 for each of the two programs A and B, so that the viewer can follow the display. Using polarized glasses 16 for a favorite program, the viewer can view a desired program on a television screen through earphones 19.

<Embodiment - Effect> In the above-described configuration, the image forming control device 8 is operated by the power source 7 of the liquid crystal television 4 of the projection television of the projection image device, and the image forming surface 5 is caused to enter the light 12 from the light source 11. As described above, the images of the two programs A and B are formed alternately within the afterimage retention time as shown in FIG. The polarization conversion device 10 broadcasts images A and B as polarized images with a difference of 90' onto the stereo screen 13 as broadcast light, and the images A and B are reflected while maintaining mutual polarization.
The polarized glasses 16 of the viewer 15 seated at 14... are inserted into the polarized glasses 16 of the viewer 15, who is wearing the glasses 16 of the desired program in advance, so that the viewer 15 can see the desired l with the polarized filter 17. Also, by inserting one earphone into the jack of the seat 14, the audio of the selected program can be heard, so that many viewers 15.1
5... can watch various desired programs.

In addition, in FIG. 2, for convenience of illustration, the spray screen 1 is
The broadcast light 18 reflecting 3 is shown in a straight line and the shoulder glasses 16
It is shown as being incident on.

Therefore, a large number of viewers 15.15... can freely watch the two programs on one stereo screen 13 independently of each other. ! [I can twist it.

That is, as shown in FIGS. 3(B) and 3(C), AB, AB, . . . of the two programs formed on the stereo screen 13 in FIG. ,B,
It can be viewed as an image of B... In this case,
As mentioned above, each independent program A, B... is imaged within the afterimage retention time, so that each viewer 15, 15... can see a continuous screen as an afterimage. I can do it.

In the above-mentioned embodiment, the projection television 4 is a liquid crystal television, but the invention of this application can certainly be applied even when the projection image device is a cathode ray tube type projection television. In the embodiment shown in Figure 4,
The projection image is projected on the cathode ray tube type projection television 4', and therefore, since the cathode ray tube type projection television does not have a polarizing plate unlike the liquid crystal television, the projection television 4'
By providing an external polarizing plate 22 between the polarization conversion device 10 and the polarization conversion device 10 in front of the polarization conversion device 10, the stereo screen 13 displays two polarized lights that are 90° different from each other as shown in FIG. The polarizing filter 17 can continuously create images of two programs AB, AS, etc. in the same cycle within the afterimage retention time, and match the desired program to the polarized glasses 16 of the viewers 15, 15, etc. By selecting the polarized glasses 16 having the polarized glasses 16, the light rays 18 reflected by the stereo screen 13 are shown to the eyes 21 of each viewer 15 while maintaining the polarization, so that the selected desired screen (top) is displayed on the entire screen as in the embodiment. can be selectively viewed independently of each other.

In this embodiment as well, even if the polarized glasses 16 are removed and the stereo screen 13 is viewed with the naked eye, the screen cannot be recognized.

In the above-mentioned two embodiments, two programs △ and B are shown on one stereo screen in a time-sharing manner by one projection television 4.4', as shown in FIG. 3(a). In the embodiment shown in FIG. An LCD TV 4.4 is installed exclusively for programs A and B, and programs A and B are broadcast and viewed independently of each other with a polarization of 90' without using a polarization conversion device for each. By wearing the polarized glasses 16 that match the desired program, the person 15, 15, .

Further, in order to use the projection television as a plastic tube projection television in substantially the same manner as in the embodiment, two cathode ray tube projection televisions 4' and 4' are installed as shown in FIG. 9 in front of it, similar to the embodiment shown in FIG.
Polarizing plates 22 and 22' with different 0° polarization angles are provided to display each dedicated program A, on the same stereo screen 13.
Therefore, in this embodiment, there is no need to install any polarization conversion device 10 as shown in the above-mentioned embodiments, and the The two independent program screens are viewed by viewers 15 with their polarization maintained.
．． 15..., and the polarized glasses of each person's choice 16
．． 16... The programs selected by the users can be viewed on the entire screen.

Of course, in each of the above-mentioned embodiments, similarly to the embodiment shown in FIG. 1, the sound from the earphone 19 is inserted into the jack set to the channel corresponding to each program, so that the sound corresponding to the program selected on the screen can be output. Of course you can hear it.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments. For example, if polarized glasses with an adjustable polarization angle are used instead of providing a fixed polarizing filter in polarized glasses, Programs can be selected simply by changing the polarization angle.

In addition, the application applies not only to passenger seats in front of aircraft, but also to passenger seats 1 on ships.
Of course, it can also be applied to movie theaters, outdoor movie theaters, etc., and can also be applied to large home televisions.

<Effects of the Invention> As described above, according to the invention of this application, it is basically possible to broadcast two images on one stereo screen using one or two projection image devices. , multiple viewers can selectively view desired images independently of each other, and moreover, can simultaneously view the entire screen on the same screen. The excellent effect of being able to express the viewing of
Depending on the design, a single projection image can be used to stream images, which not only makes effective use of space, but also has the effect of being efficient in terms of facilities and space.

In addition, it can be used not only for entertainment, but also for learning and research in research institutes and schools, and has the excellent effect of making it possible to use information for educational purposes.

Accordingly, in the specific invention, images of two programs, etc. can be time-divisionally projected onto one stereo screen using a single projection image device through a beam of light. Since different images can be broadcast over the entire screen, an excellent effect is achieved in that viewers can selectively view images of different programs using afterimages.

In addition, in the dependent invention, by making the polarization different by 90 degrees by two projection image @ devices and broadcasting different images on one stereo screen,
Since the images of two programs, etc. on the stereo screen can be viewed selectively using the corresponding polarized glasses, many viewers can see the screen with higher precision.11. The excellent effect of being able to Q is Qin.

Furthermore, in the invention of this application, since two images are broadcast on one stereo screen, the effect is achieved that multiple viewers can view different images by the reflected light beams that maintain polarization. Ru.

And since each person can watch one program on the entire surface of one stereo screen, the eyes won't get tired, and in reality, the effect is similar to that of many people watching one image. is played.

[Brief explanation of drawings]

1 to 6 are detailed explanatory diagrams of the invention of this application, FIG. 1 is a schematic diagram of one embodiment, FIG. 2 is a viewing schematic diagram of the same polarizing screen, and FIG. 3 is two overlapping images. The separation graph diagram on the stereo screen, Figure 4.5.6 is the first
Fig. 7 is a schematic diagram of another embodiment corresponding to the figure, Fig. 7 is a schematic diagram of a dual screen broadcasting based on the prior art, and Fig. 8 is the same (based on the prior art!). 11 is a schematic diagram of 11 screens. 4.4'... Image projection device, 13... Stereo screen, A, B... Program (image)

Claims (2)

[Claims] (1) In a dual projection image display system in which two projected images are simultaneously shown on one screen so that multiple viewers can selectively view the images individually, one image projection device can Through two orthogonal polarized lights, two images are time-divisionally broadcast on one stereo screen on the same full screen in the same cycle, and a plurality of viewers can use polarized glasses that match each of the two programs. A double projection image display system characterized in that the screens of two programs are individually and selectively viewed on the same full screen. (2) In a projection image dual display system in which two images are simultaneously broadcast on one screen by an image projection device so that multiple viewers can selectively view the images individually, the two image projection devices The device simultaneously broadcasts two images on one stereo screen in the same full screen through 90° different polarizations, while multiple viewers can view the two images using polarized glasses that match each of the two images. A dual projection system for projecting images, characterized in that screens are individually and selectively viewed on the same full screen.