JPS59190788A - Stereoscopic television receiver - Google Patents

Abstract

PURPOSE:To attain simultaneous observation of a stereoscopic image of lots of personnels by providing an polarized exchange before one set of television receiver, applying alternately a video signal for left and right eyes and applying conversion to the polarized exchange alternately. CONSTITUTION:The polarized exchange 17 where a polarized angle is changed by 90 deg. is provided on the front face of one set of the television reciever 15 and right and left eye shutters 13a, 14a are opened alternately to apply the video signal for left and right eye alternately to the television receiver 15. A prescribed voltage is applied alternately to the polarized exhange 17 at the same time so as to change the polarized angle by 90 deg.. Thus, the left and right eye image is obtained alternately from one set of the television receiver 15, thereby allowing lots of personnels to observe a stereoscopic image at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stereoscopic tenvision apparatus for observing stereoscopic images through viewing glasses equipped with polarizing plates.

A conventional stereoscopic television device will be explained based on FIGS. 1 and 2.
The subject is photographed at the same magnification by the camera 1a for the left eye and the rv camera ibl for the left eye, respectively, and transmitted to the CRT display device 2a for the right eye and the CRT display device 2b for the left eye. A polarizing plate 3a having a polarization angle of 45° with respect to the horizontal is provided on the front surface of the CRT display device 2a for the right eye, and a polarizing plate 3a with a polarization angle of 135° with respect to the horizontal on the front surface of the CR'r display device 2b for the left eye. 3b, and the respective display devices 2a and 2b are arranged so that their screens are perpendicular to each other. Image display device 2a.

A half mirror 4 is provided in front of 2b to transmit an image from one display device and reflect an image from the other display device. Therefore, the left and right images are overlapped through the viewing glasses 6, which are equipped with a polarizing plate 5a having the same polarizing angle as the polarizing plate 3a for the right eye, and a polarizing plate 5b having the same polarizing angle as the polarizing plate 3b for the left eye. By observing , you can see the image of the subject in 3D.

This stereoscopic television device includes two display devices 2a,
2b and a half-mirror 4 are required, resulting in a large size.Furthermore, since observation is performed through the half-mirror 4, the range that can be viewed stereoscopically is narrow, and there is a problem that only one person and two people can observe.

This invention is intended to solve the above problems, and its purpose is to create a 3D system that allows images that can be viewed stereoscopically through viewing glasses equipped with polarizing plates to be viewed stereoscopically using a single Yurevision. The purpose of the present invention is to provide a revision device.

That is, the present invention provides a polarization switch that is installed in front of a display section of a television and can change the polarization angle by 90 degrees, and a revision l that includes either a right-eye video signal or a left-eye polarizer.
The present invention is characterized in that it comprises a switching control section that periodically and synchronously switches the polarization angle of the polarization switch and the video signal of the video signal generation section.

The present invention will now be described based on embodiments shown in the accompanying drawings.

As shown in FIG. 3, an optical system 11 is provided in front of the camera 10, which can photograph a subject from either the right front or the left front, and the TV camera 10 and the optical system 11
The video signal generating section 12 is configured by the following. This optical system has 11 parts, '1 - ■4 points on the optical axis of the camera 10,
A no-fu mirror 13 tilted at 5° and perpendicular to the TV camera 10, and a mirror 14 parallel to this no-fu mirror 13 with a moon-shaped mirror surface facing the no-fu mirror 13.
and electronic or mechanical left-eye and right-eye shutters 13a and 14a provided in front of each mirror 13.about.14. Therefore, if only the left-eye shutter 13a is opened, the left-eye image will be reflected through the left-eye shutter 13a and the half mirror 13, and if only the right-eye shutter 14a is opened, the right-eye shutter 14a and the mirror 14 will be reflected. Since the right eye image is reflected through the -7 mirror 13, either the right eye video signal or the left eye video signal can be supplied to the revision 15. Note that this optical system 1
1 is accurate (the images are taken from the front and left front of the moss TV camera 10, but by adding two mirrors etc.
Images can be taken from ifj forces that are symmetrical to the front of the V camera.

In front of the display section 16 of the television 15, there is provided a polarization converter 17 that can change the polarization angle by 90 degrees. This polarization changer 17. As shown in FIG. 4, a twisted matic liquid crystal (hereinafter referred to as TN liquid crystal) 19 is surrounded by a transparent substrate 18 made of glass or the like, and a polarizing plate 20 is connected in one direction to the transparent substrate 18Q. The polarizing plate 20 facing the display section 16 of the cell revision 15 is fixedly constructed. Since the state of the TN liquid crystal 19 changes depending on whether a predetermined voltage is applied to the electrodes (or leads, etc.) and when no voltage is applied, the polarization switch 17 controls the polarization angle so that it changes by 90 degrees. Wholesale. In addition,
In the polarization switching device 17 shown in FIG. 4, the polarization angle of the light plate 20 is 45°, and the polarization angle of the TN liquid crystal 19 is 45°, which is the same as that of the polarizing plate 20 when a predetermined voltage is applied.
If the voltage is not applied to L7 (changes by 90 degrees from when voltage is applied), the above 1゛N? (l crystal 19'H
1PLZN ceramic (lead, lanthanum.

The polarization angle can be changed by the presence or absence of a voltage (or an electric field), such as zirconium, titanium sintered ceramics).
Any transparent material that can be changed by 0° is sufficient.

Further, a switching controller 21 which receives the synchronization signal emitted from the TV camera 10 detects the synchronization signal, and generates a left shutter signal a that opens the left eye shutter 13a and a right shutter signal that opens the right eye shutter 14a. I) and a polarization switching signal C for applying a predetermined voltage to the polarization switching device 17. For example, if a synchronization signal from the TV camera 10 is detected and the synchronization signal is an odd field of one frame,
When the right shutter signal is applied, the polarization switching signal C is emitted and the left shutter signal λ is stopped.If the field is an even field, the left shutter signal a is emitted and when the right shutter signal is sent, the polarization switching signal C is stopped. A right eye image and a left eye image are alternately obtained from the switch 17 via the television 15 and the television 15.

The present invention has the above configuration, and its operation will be explained next.

When the TV camera 10 is operated, the switching controller 21 detects a synchronization signal emitted from the camera 10. If the synchronization signal is an odd number 7 (-) of one frame, the right shutter emits the polarization switching signal C, stops the left shutter signal a, closes the left eye shutter 13a, and opens the right eye shutter i4a. The right eye image is incident on the RV camera 10I via the right eye shutter 14a, the mirror 14 and the half mirror 13, and the right eye video signal is sent to the RV camera 10I through the right eye shutter 14a, the mirror 14 and the half mirror 13. Since the polarization angle is 45° with respect to the horizontal,
A polarizing plate 5a with the same polarization angle (45° to the horizontal) is used for the right eye, but the polarization angle is still 90° different from this polarizing plate 5a (i.e., the polarization angle is 135° to the horizontal). When the image from the polarization switch 17 is observed using viewing glasses 6 having a polarizing plate 51) for the left eye, it can be seen from the polarizing plate 5a for the right eye, but not from the polarizing plate 5b for the left eye.

On the other hand, if the synchronization signal is several fields during one frame, the left shutter signal a is emitted, the right shutter signal ') b and the polarization switching signal C are stopped, the left eye shutter 13a is opened, and the right eye shutter 14a is closed. Then, the left-eye image is incident on the TV camera 10 via the left-eye shutter 13a and the half mirror 13, and a left-eye video signal is sent to the television 15+.

Since no voltage is applied to the individual switching device 17 and the polarization angle is 135° with respect to the horizontal, when the image from the polarization switching device 17 is observed through the viewing glasses 6, it cannot be seen from the right eye polarizing plate 5a. However, it can be seen from the left eye polarizing plate 5b.

In addition, in the above embodiment, the switching controller 210″i,
Instead of the synchronization signal from the TV camera 10, a synchronization signal emitted from the television 15 may be input. Also,
The right eye image is switched between the odd field and the even field of one frame, and signals a, b, and c are sent to the switching controller 21 to switch between the right eye image and the left eye image 97 times every frame. Good too. Furthermore, TV camera 10
When a signal indicating an odd field and an even field is emitted from the shutter 13a, this signal directly triggers the shutter 13a.

14a may be switched.

Next, a second embodiment of the present invention will be described based on FIG.

As shown in FIG. 5, a synchronization signal is sent from the synchronization signal generator 23 to the right-eye RV camera 22a and the left-eye TV camera 22b, and each TV camera 22a, 22b receives a video signal 41E converter 24. A video signal for the right eye and a video signal for the left eye are output. If the switching controller 25 inputs the synchronization signal from the synchronization signal generation section 23, and if it is an odd field of one frame, the video signal for the right eye, which is the output of the TV camera 22a for the right eye, is output from the video signal switching section 24. is sent to the television 15, and a voltage is applied to the polarization switch 17 to set the polarization angle to 45 degrees with respect to the horizontal. If it is an even field of one frame, the video signal switching section 24 sends the left eye 'rv camera 22b. The left-eye video signal output from the left eye is sent to the television 15, and the voltage applied to the polarization switch 17 is set to zero, and the polarization angle is tossed by 135 degrees with respect to the horizontal I. Therefore, when observing the image of square revision 15 with the viewing glasses 6, the right eye image and the left eye image are alternately incident on the right eye and the left eye from the right eye polarizing plate 5a and the left eye polarizing plate 6b, and the afterimage effect of the eyes causes the stereoscopic I can see it. Note that the video signal generation section 26 is
Two TV cameras 22a and 22b and a synchronization signal generator 2
3, and a video signal 53'I7J conversion section 24.

Further, the video signal switching unit 24 and the switching controller 25 may be integrated, and the polarization switching unit 17 may be controlled by the video signal switching unit 241. In this case as well, the switching controller 25 may obtain a synchronization signal from the television 15, or may switch between the right-eye image and the left-eye image every frame.

Next, a third embodiment of the present invention will be described with reference to FIG.

As shown in Figure 6, the X-ray irradiation device 27 and the subject 28
The X-ray image of the subject 2B is displayed on the image intensifier 1 intensifier 29, this display is photographed by the TV camera 30, and the image is displayed on the image intensifier 15 send a signal. The X-ray emitting device 27 includes two focal points 31a and 31b that emit X-rays at a certain distance. Therefore, the switching control 182 which inputs the synchronization signal from the TV camera 30 applies a voltage to the polarization switch 17 when the light is emitted from the right focal point 31a during one frame of the folded field. Left focal point 31b when in even field
If the voltage of the polarization switch 17 is set to zero, X, %l (i) can be viewed stereoscopically through the viewing glasses 6 using the t revision 15. In this case, the X-ray exposure device 27 .Image intensifier 29 and T
A video signal generation section 33 is configured by the V camera 30,
When the TV camera 30 emits a signal indicating an odd field and an even field, the focal points 31a and 31b of the X-ray exposure device 27 may be shifted by this signal.

Further, the fourth embodiment of the present invention will be explained based on FIG. 7.As shown in the figure, right-eye video signals and left-eye video signals are alternately recorded on the videotape in advance. A video tape recorder (hereinafter referred to as V, TR) 34 serving as a signal generating unit supplies a right-eye video signal to the television 15 during an odd field of one frame and a left-eye video signal during an even field of one frame. do. Further, the switching controller 35 emitted from the VTR 34 applies a voltage to the polarization switching device 17 if the field is an odd number.
If it is an even field, the voltage applied to the polarization switch 17 may be set to zero. In this case, if a right-eye video signal and a left-eye video signal are recorded on the videotape for each frame, the switching controller 35 switches the polarization switch 17 for each frame.
All you have to do is switch.

What about the above examples? In the case of directly observing revision 15, or in the case of observing by a large number of people, as shown in FIG. 8, red, green, and blue projection tubes 36a are used.

36b and 36C are provided, and projection tubes 36a and 361 are provided.
) and 36C onto the screen 38 via lenses 37a, 37b, and 37C. At this time, the polarization converters 3da, 39b, and 39C are the projection tube 36a.

Between 36b, 36C and lenses 37a, 37b, 37C,
Immediately after lens 37a, 3'71), 37C or lens 3
What is necessary is just to provide it integrally with 7a, 3'Tb, and 37C.

As described above, this invention provides a polarization exchanger that changes the polarization angle by 90 degrees on the curved surface of one television, and has the following features: At the same time as the supply, the polarization exchanger alternately converts the
Therefore, the right-eye image 1 and the left-eye image can be obtained alternately from one television set, and there is an advantage that a large number of people can observe one stereoscopic image at the same time. It also has the advantage of being economical, since only one display device is required.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing a conventional three-dimensional revision device, FIG. 3 is an explanatory diagram showing an example of the present invention, FIG. 4 is an enlarged view of a portion of FIG. 3, and FIG. 5. Figures 6 and 7 are explanatory diagrams showing examples of rice cakes according to the present invention;
The figure is an explanatory diagram when observing with a large number of people. 10.22a, 22b, 30...TV camera, 11...
・Optical system, 12, 26. 33... Video signal generation section, 1
3...Half mirror-114...Mirror, 13a, 14
a...Shutter, 15...Door revision, 16...
-Display section, 17...Polarization switch, 18...Transparent substrate,
19...T N liquid crystal, 20... Polarizing plate, 21, 25
．． 32. 35... Switching controller, 23... Synchronization signal generation unit, 24... Video signal switching unit, 27... X-ray exposure device, 29... Image intensifier, 34...
...VTR0 patent applicant Photron Co., Ltd. Agent Kama 1) Bun 2

Claims (1)

[Claims] (A polarization switcher installed in front of the display section of the 11f revision and capable of changing the polarization angle by 90 degrees, and a video signal generator that supplies either a right-eye video signal or a left-eye video signal to the television. and a switching control unit that switches the polarization angle of the polarization switcher in synchronization with the switching cycle of the video signal of the video signal generation unit. (2) The video signal generation unit includes a television camera; 3. The stereoscopic television apparatus according to claim 1, further comprising an optical system capable of photographing the front of the camera from left and right. (3) The video signal generating section includes two television cameras. The stereoscopic television apparatus according to claim 1, characterized in that it has The stereoscopic television apparatus according to claim 1, further comprising an X-ray irradiation device that irradiates X-rays to a subject. The invention is characterized in that it detects a synchronizing signal from a tape recorder or a television camera and switches one video word of the video signal generator and the polarization angle of the polarization switch periodically and synchronously. The stereoscopic television device according to any one of items 1 to 4. (6) The polarization converter is a transparent liquid crystal plate or a transparent P
The stereoscopic television device according to claim 1, wherein the stereoscopic television device is made of LZT ceramic.