JPS63280216A - Stereoscopic display device - Google Patents

Abstract

PURPOSE:To enable an observer to enjoy to observe a screen with preferable brightness by magnifiably observing an image on a left eye image display panel by his/her left eye through an optical lens, also magnifiably observing an image on a right eye image display panel by his/her right eye through an optical lens to monitor a stereoscopic image by using both the magnified images. CONSTITUTION:A left eye image display panel 10-L and a right eye image display panel 10-R are separatedly arranged on a magnifiable observation unit 6 correspondingly to the left and right eyes of the observer 14 and a left eye image and a right eye image to be respectively displayed on the image display panels 10-L, 10-R are independently magnifiably observed by magnifiable observation lenses 7-L, 7-R. The magnifiably observed images on the image display panels 10-L, 10-R are can be observed on the positions of a virtual image face 13 as erected magnifiable virtual images. Although liquid crystal panels are the most optimum for the image display panels 10-L, 10-R at present, the use of other display panels such as plasma display panels, LED panels and EL panels is supposed in the future. Consequently, the bright stereoscopic image without cross talk is obtained.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a three-dimensional image display device, and in particular to a device that displays images using scanning lines and video signals like television images, etc. For example, entertainment.

This invention relates to a three-dimensional image display device that can be used in many fields such as education, measurement, medical care, and nuclear reactor operation.

(Prior Art) Conventionally, there are the following methods for displaying stereoscopic images using binocular parallax.

(1) There is a method of wearing polarizing filter glasses and viewing a composite image of an orthogonally polarized image for the left eye and image for the right eye separately for each eye. It was exhibited at the Tsukuba Science Expo.

■ Using time-sharing shutter glasses, the opening and closing of the shutter of the glasses is synchronized with the images for the left eye and the image for the right eye, which are projected alternately, so that when the image for the left eye is displayed, the shutter for the left eye is There is a method in which the shutter for the right eye opens and the shutter for the right eye closes, and when the right eye image is displayed, the shutter performs the opposite operation to see the image corresponding to each eye.This method is based on capacitance. It has been widely sold since 1986 as a 3D (stereoscopic image) system using a value change detection type video disc system.

■ There is a method that uses red and blue filter glasses to separate the red and blue images with the left and right eyes.
This has been conventionally done in stereoscopic movies, stereoscopic television broadcasts, and the like.

(Problems to be Solved by the Invention) (1) In the above-mentioned conventional technology, stereoscopic vision is impaired unless the screen is viewed in an upright position without tilting the head to the left or right. There are other problems, and a further problem is that a natural three-dimensional effect cannot be obtained when taking an image unless viewed from the center of the screen. In contrast, the present invention
To provide a 3D image display device that enables normal 3D viewing in any posture, even if you tilt your face to the left or right, front or back, diagonally, or while lying down, and that always provides a natural 3D effect as seen from the direction of the camera at the time of image capture. The purpose is to

(2) In the conventional technology described above, the image display device is large, heavy, and expensive. In contrast, an object of the present invention is to provide a device that is small, lightweight, highly versatile, and relatively inexpensive.

■ When a television video system is used in the conventional technology described above, an image for the left eye and an image for the right eye are displayed alternately for each field, and one eye is displayed for 1/30 seconds. Every flicker is detected, causing discomfort,
There was a problem with my eyes being tired. In contrast, the present invention aims to eliminate this flicker and provide a device that does not cause eye strain.

(4) In the above-mentioned conventional technology, the separation between the left-eye image and the right-eye image is not achieved completely due to incomplete polarization, incompatibility with the shutter speed, imperfections in the filter, etc. , there was a problem called "crosstalk" where ghost images coexist with each other. In view of this, an object of the present invention is to provide an apparatus that can reliably separate images for the left eye and images for the right eye, and provide a clear image without crosstalk.

(In order to make zero crosstalk less noticeable, the above-mentioned conventional technology limits the brightness of the image, so there is a problem in that the user has to view an image with unsatisfactory brightness. SUMMARY OF THE INVENTION An object of the present invention is to provide an II that allows users to enjoy images with desired brightness without worrying about crosstalk.

(Means for Solving the Problems) In order to achieve all of the above objects, the present invention provides an image for the left eye and an image for the right eye, which are photographed so that binocular parallax occurs, to each eye. An image display panel for the left eye and an image display panel for the right eye are arranged to correspond and display separately, and the image on the image display panel for the left eye is magnified by the left eye through an optical lens, and the image on the image display panel for the left eye is enlarged by the left eye through an optical lens. To provide a stereoscopic image display device, characterized in that an image on an ophthalmic image display panel is similarly enlarged by the right eye through an optical lens, and a stereoscopic image is monitored using both of these enlarged images. It is something.

(Embodiment) FIG. 1 is a perspective view showing an embodiment of a stereoscopic image display device of the present invention.

In the figure, 1 indicates the entire stereoscopic image display device. 2 is a stereoscopic image input signal, which is a 3D (stereoscopic image) playback signal of a capacitance value change detection type video disc system, a stereoscopic image signal from a video tape recorder (VTR), a stereoscopic image signal from a television broadcast radio wave, etc. is applicable.

3 is a control device that appropriately controls the stereoscopic image signal 2 and sends this controlled signal to the second image monitoring device 5.
As shown in the figure, a built-in image display panel 1G-L,
The signal is sent via the signal transmission line 4 to the drive circuits 11-L and 11-R of 1G-R (in the following symbols, L indicates the left eye and R indicates the right eye).

This control device @3 also has a memory function and an electric power function for image I & signals as necessary, and has image display panels 10-[ and 10-
Necessary signals are separated and sent to the R drive circuits 11-L and 11-R under synchronous control.

The image monitoring device 5 includes a magnifying vision unit 6, a hood 8, and a band 9, and magnifying vision lenses 7-L and 7-R corresponding to the left and right eyes of the observer, respectively, are attached to the magnifying vision unit 6. ing.

FIG. 2 is a plan sectional view showing a main part of an embodiment of the device of the present invention, and is used to explain the state of use thereof.

In the same figure, an image display panel 10-L for the left eye and an image display panel 10-R for the right eye are connected to the enlarged vision unit 6 for the observer 1.
The image for the left eye and the image for the right eye that are respectively displayed on the image display panels 10-L and 10-R are arranged separately corresponding to the left eye and right eye of No. 4, respectively, through the magnifying lens 7. −
L and 7-R provide an independently enlarged view.

The enlarged images on the image display panels 10-L and 10-R appear as erect enlarged virtual images at the position of the virtual image plane 13.

Although liquid crystal panels are currently considered to be the most suitable image display panels 1G-L and 10-R, it is expected that plasma display panels, LED panels, EL panels, and other display panels may be used in the future. In the device of the present invention, the image display panels 10-L and 10-R are not limited to liquid crystal panels.

Further, 11-L and 11-R are drive circuits for the image display panels 10-L and 10-H, respectively, and are connected correspondingly through flat cables 12-L and 12-R. Note that if the image display panels 10-L and 10-R are liquid crystal panels, they naturally have a built-in backlight function, although not shown.

Drive circuit 1i-t, 11-R, flat cable 12
-L.

12-R etc., the supervisor 14 uses the image display panel 10-L,
Naturally, it is arranged so as not to impair the magnified view of 10-R.

The hood 8 is made of rubber or synthetic resin with appropriate flexibility and looks like a goggle hood.

The band 9 is for holding the image monitoring device 5 on the face of the observer 14, and although a single band is simply illustrated in FIGS. 1 and 2, it may be composed of multiple bands. It may be made of a stretchable material, and its structure, including the method of engagement with the hood 8 or the magnifying unit 6, may be arbitrary.

The magnifying lenses 7-L and 7-R have a structure in which the focus can actually be adjusted according to the visual acuity of the observer 14.

FIG. 3 shows an example of the signal control function of the control device 3 shown in FIG.

A commonly used method is to display images for the left eye and images for the right eye alternately for each field on a single image display panel. As in the case of a stereoscopic image (stereoscopic image) system, the arrangement of each field of the stereoscopic image input signal 2 input to the control device @3 is shown in FIG. 3(A). In addition, L
means that it is an image signal for the left eye, and R means that it is an image signal for the right eye.

In FIG. 3, ■, ■, ■, . . . are numbers assigned to the fields in order. In the case of the device of the present invention, there are separate image display panels for the left eye and for the eye, so it is sufficient to always display the image for the left eye on the image display panel for the left eye, and the image for the right eye is displayed on the image display panel for the left eye. The image for the right eye should always be displayed on the panel. When the signals shown in Fig. 3 (A) are arranged separately on the image display panels for the left eye and the right eye, the signals shown in Fig. 3 (B),
(C). Therefore, as shown in FIGS. 3B and 3C, images are repeatedly displayed twice using the same signal over two fields on each of the image display panels for the left eye and the right eye.

In addition, since one field is 1/60 second in the case of an NTSC television signal, the L in FIG. In other words, when looking at one eye in the same figure (A), it appears at 1/2 the period compared to R and R.
While the image appeared every 0 seconds, the same figure (B), (
In C), an image appears every 1/60 seconds, which has the great effect of making flicker less noticeable.

In order to obtain the signal arrays shown in (B) and (C) in the same figure, at least one field of [ and one field of R are required, so the control system @3 requires this memory. Must have memory.

Then, the signals are controlled according to the timings shown in FIGS. 11B and 11C, and sent to the drive circuits 11-L and 11-R, so that properly synchronized images are displayed on the image display panels 10-L and 10-R. It is displayed.

FIGS. 4(A) and 4(B) are basic layout diagrams showing other configuration examples of the apparatus of the present invention.

In Fig. 4<A), 15-L and 15-R are prisms that bend the optical path at right angles, and the arrangement of the image display panels 10-L and 10-R is different from that in Fig. 2. It can be changed as shown.

FIG. 4(B) shows the prism 15-L of FIG. 4(A).

The figure shows a case where anti-tJ4 mirrors 16-L and 16-R are used instead of 15-R.

In this way, the image display panels 10-L and 10-R are
As shown in the figure, the image display panel 1 does not necessarily need to be placed directly in front of both eyes, and its placement can be relatively freely changed using appropriate optical means.
When selecting the sizes of 0-L and 10-R, there is no need to worry about them not being able to make the required size because they are in contact with each other.

(Effects of the Invention) As described above, the stereoscopic image display device of the present invention has the following features.

(1) Normal stereoscopic vision is possible regardless of the posture, whether the face is tilted forward, backward, left or right, diagonally, or lying down, and a natural three-dimensional effect as seen from the direction of the camera at the time of image capture is always obtained.

■ Compact, lightweight, portable, and relatively inexpensive equipment can be realized.

(3) A device with less noticeable flicker and less eye strain can be realized.

(4) A clear and bright stereoscopic image without crosstalk between the left eye image and the right eye image can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the device of the present invention, Fig. 2 is a plan sectional view showing the main parts of an embodiment of the device of the present invention, and is a diagram for explaining the usage state thereof, and Fig. 3 (A) to (C) are diagrams showing an example of the signal control function of the control device 3, and FIG.
) and (B) are diagrams showing other configuration examples of the device of the present invention. 1... Three-dimensional image display device, 5... Image monitoring device, 6
... Magnifying vision unit, 7-L, 7-R... Magnifying vision lens, 10-L, 10-R... Image display panel,
13...Virtual image plane.

Claims (1)

[Claims] A left-eye image display panel and a right-eye image display panel are provided that separately display a left-eye image and a right-eye image corresponding to each eye, which are photographed so that binocular parallax occurs. The image on the left eye image display panel is magnified by the left eye through an optical lens, and the image on the right eye image display panel is similarly magnified by the right eye through an optical lens. A stereoscopic image display device characterized in that a stereoscopic image is monitored using both enlarged images.