JPH08186849A - Stereoscopic visual device - Google Patents

Abstract

PURPOSE: To allow the user to enjoy a video image with a stereoscopic sense simply without the use of a polarizing eyeglass and without an extreme limit at a position of watching a screen. CONSTITUTION: A stereoscopic parallax device 1 is made up of left right liquid crystal rear projectors 2L, 2R, LD players 8L, 8R and a screen 10. A lenticular lens 12 and a polarizing plate 13 are arranged on a front side and a rear side so as to have a diffusion plate 11 forming a middle part of the screen 10 inbetween. A polarizing element 13R with one polarization direction in the lateral direction with a half pitch and a polarizing element 13L with one polarization direction in the longitudinal direction with a half pitch with respect to one pitch of a projection of a semicylindrical shape of the lenticular lens 12 are arranged alternately and stuck to a rear of the diffusion plate 11. Then two liquid crystal rear projectors 2L, 2R project striped video images 7L, 7R from a rear 10b of the screen 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic vision device capable of observing a stereoscopic image without using polarized glasses.

[0002]

2. Description of the Related Art For example, one using a lenticular lens or an image splitter is known as a stereoscopic vision device capable of observing a stereoscopic image without polarizing glasses. These will be specifically described with reference to FIGS. 9 and 10. FIG.
Double lenticular lens type stereoscopic vision device 100
That is, stereoscopic viewing is performed by utilizing the parallax between the left eye and the right eye (binocular parallax). This stereoscopic parallax device 100 projects a striped image on the diffuser plate (screen) 110 by the left and right liquid crystal projectors 101L and 10R, and a pair of lenticular lenses (kamaboko The left and right images 112L and 112R are separated by lenses 111 and 111 each having a cross-sectional shape such that a plurality of lenses are arranged. Due to the optical characteristics of each lenticular lens 111, the image A for the left eye 112L can be seen only by the left eye and the image 112R for the right eye can be seen only by the right eye from the observer A, so that a stereoscopic image can be viewed. As a result, a stereoscopic image can be enjoyed without using special polarizing glasses. In FIG. 9, 102L and 102R are video disk (LD) players, and 103 is a system controller thereof.

FIG. 10 shows an image splitter type stereoscopic vision device 200, which produces a stereoscopic effect of an image by utilizing the parallax between the left eye and the right eye. This stereoscopic vision device 200
On the LCD (liquid crystal display) 201, a left-eye image 212L and a right-eye image 212R are alternately displayed in stripes for each pixel. The image 212L for the left eye and the image 212R for the right eye are displayed on the LCD.
The image is separated by the image splitter 210 attached on 201. The image splitter 210 has a striped light shielding portion 210a provided on a glass plate, and the distance between the stripes (the light shielding portion 210a and the opening 210b).
By adjusting the interval), the left eye sees only the image 212L for the left eye and the right eye sees only the image 212R for the right eye. As a result, a stereoscopic image can be enjoyed without using special polarizing glasses. still,
Reference numeral 202 in FIG. 10 denotes a backlight.

[0004]

However, the double lenticular lens type stereoscopic vision device 1 shown in FIG.
With 00, the position where the screen looks stereoscopically is extremely limited due to the optical properties of the lens, and there is a drawback that the screen becomes invisible if the position deviates from this viewpoint limited position. As a result, the observer A must adjust and fix the position of his head to a limited position where he can see the screen, and the work and the like are complicated. Furthermore, the positions and the like of the two liquid crystal video projectors 101L and 10R must be strictly arranged, and the work such as installation and movement of the installation place is complicated.

Further, in the image splitter type stereoscopic vision device 200 shown in FIG. 10, as in the case of the double lenticular lens system, if the viewing position of the screen is shifted, the images directed to the left and right eyes are distorted, resulting in a stereoscopic effect. There was an extreme restriction on the position where the screen could be seen, because a certain image could not be obtained.

Therefore, the present invention provides a stereoscopic vision device which does not have an extreme restriction on the position where the screen is viewed and which allows a user to enjoy a stereoscopic image very easily.

[0007]

Means for Solving the Problems A left-eye image and a right-eye image are alternately projected in a vertical stripe pattern on a back surface of a screen by a projector, and the image is projected by a front optical member. Left eye is for the left eye, right eye is for stereoscopic viewing without polarizing glasses when seen by the right eye, on the back side of the screen adjacent to the pitch of the stripes of each image Polarizing members having orthogonal polarization directions are arranged in stripes, and projection light for the left eye and the right eye for the left eye and the right eye, which have polarizations aligned with the polarization direction, are projected on the screen by the projector. It is configured as follows.

[0008]

Since the polarizing member having a polarization direction orthogonal to the adjacent one is arranged on the back side of the screen in a stripe shape, there is no extreme limitation on the position where the screen is viewed, and a stereoscopic image can be obtained without the polarizing glasses. Easy to watch.

[0009]

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 3, reference numeral 1 denotes a lenticular lens type stereoscopic vision device for stereoscopically viewing an image on the screen 10 by utilizing the parallax between the left eye L and the right eye R of an observer A. is there. That is, the stereoscopic parallax device 1 is
Striped images (projection light) 7L and 7R are displayed on the rear surface 1 of the screen 10 by the right liquid crystal video projectors 2L and 2R.
The image for the left eye is projected to the 0b side, and the lenticular lens (optical member) 12 and the polarizing plate (polarizing member) 13 arranged in front of and behind the diffuser plate 11 that constitutes the central portion of the screen 10 sandwich it. (Projection light) 7L and an image (projection light) 7R for the right eye are separated.

The lenticular lens 12 has a cross-sectional shape like a number of kamaboko arranged, and the diffusion plate 11
It is attached to the surface of the adhesive with an adhesive or the like. The width of one convex portion of the lenticular lens 12 is set to be one pitch (indicated by reference symbol P in FIGS. 2 and 3). Polarizer 13
Is a polarization element 13R having a width of ½ pitch (2 / P) with respect to one pitch (P) of the lenticular lens 12 and having a width of one polarization direction and a polarization element 13L having the same width and having a vertical polarization direction. Are alternately arranged and attached to the back surface of the diffusion plate 11 with an adhesive or the like.

The back surface 10b of the screen 10
Therefore, the two liquid crystal video projectors 2L and 2R project the striped images 7L and 7R. In the housings of the liquid crystal video projectors 2L and 2R, a halogen lamp 4 as a light source, a reflecting mirror 4a, a first polarizing plate 5a having a vertical polarization direction, and a liquid crystal element (from the rear side to the front side of the projection lens 3) are provided. The LCD 6 and the second polarizing plate 5b whose polarization direction is the horizontal direction are incorporated respectively. Further, a half-wave plate 7 is arranged on the projection lens 3 side of the left liquid crystal video projector 2L. Projection light 7 for the left eye from the liquid crystal video projector 2L on the left side
The polarization direction of L is 90 by the half-wave plate 7.
Rotate to the vertical direction. Therefore, the projection light 7L for the left eye passes through each polarizing element 13L of the polarizing plate 13 of the screen 10 but does not pass through each polarizing element 13R of the polarizing plate 13. Further, the polarization direction of the right-eye projection light 7R from the liquid crystal video projector 2R on the right side is the horizontal direction, so that the right-eye projection light 7R passes through the respective polarization elements 13R of the polarizing plate 13 of the screen 10. The polarizing element 13L of the polarizing plate 13 does not pass through.

Further, reference numerals 8L and 8R in FIGS. 1 and 3 denote video disc players, and an image signal for the left eye is supplied to the left liquid crystal video projector 2L via the code 8 and is supplied to the right liquid crystal video projector 2R via the code 8. Supplies an image signal for the right eye. Each of the video disc players 8L and 8R includes a left-eye and right-eye video disc (LD) (not shown), and each of the video disc players 8L and 8R is operated at the same time by operating the remote controller 9. It starts playing without.

According to the stereoscopic vision apparatus 1 of the above embodiment, as shown in FIG. 3, the viewer A is the right eye R, and the image 7R for the right eye projected by the liquid crystal video projector 2R on the right side is on the screen 10. After passing through each polarizing element 13R of the polarizing plate 13,
The image for the right eye formed by the diffusion plate 11 of the screen 10 is viewed. Similarly, the viewer A is the left eye L, and the left-eye image 7L projected by the left liquid crystal video projector 2L passes through each polarizing element 13L of the polarizing plate 13 of the screen 10 and is diffused by the diffusion plate 11 of the screen 10. Looking at the formed image for the left eye. That is, the optical characteristics of the polarizing plate 13 and the lenticular lens 12 of the screen 10 cause the observer A
From the view, the image 7L for the left eye can be seen only by the left eye L, and the image 7R for the right eye can be seen only by the right eye R, so that a stereoscopic image can be viewed. As a result, it is possible to very easily enjoy a stereoscopic image without using special polarizing glasses.

Further, since the polarizing element 13R in which the polarization direction of the polarizing plate 13 is the horizontal direction and the polarizing element 13L in the vertical direction are arranged for one pitch of each of the semi-cylindrical convex portions of the lenticular lens 12, the screen 10 is arranged. The range of viewing positions is wide, and it is possible to view images with a stereoscopic effect very easily without using polarized glasses. As a result, the conventional double lenticular lens type stereoscopic vision device 100 is used.
As described above, the position where the screen looks stereoscopically is not extremely limited due to the optical properties of the lens, and the observer A does not have to adjust or fix the position of the head as in the conventional case, and It is extremely easy to see a screen with a stereoscopic effect from a wide range of 10 positions. In addition, the installation positions of the two video liquid crystal projectors 2L and 2R do not need to be strictly arranged as in the conventional case, and the work such as installation and movement of the installation place can be performed extremely easily, and the range of use jumps. Can be expanded.

FIG. 4 shows another mode of the above embodiment. As shown in FIG. 4, the diffusion plate 1 of the screen 10
A polarizing plate (polarizing member) having a vertical polarization direction on the back surface of 1
3 is pasted. Further, a half-wave plate 14 is disposed on the back side of the polarizing plate 13 at a position where the polarization direction in FIG. 3 corresponds to the horizontal polarizing element 13R. Since 14 are combined so as to pass the polarized light in the lateral direction, they eventually have the same function as in FIG. In addition, the polarizing plate 1 is provided on the entire back surface of the diffusion plate 11.
It is very easy to manufacture by sticking No. 3 and further sticking the half-wave plate 14 on this in a stripe shape.

FIG. 5 shows another embodiment of the above embodiment. A thin black stripe 15 is printed very thinly on both corners of the half-wave plate 14 on the back surface of the polarizing plate (polarizing member) 13 in the vertical direction shown in FIG. ing. As a result, images 7L, 7 for the left and right eyes
R does not overflow from the border and the image and color do not bleed to the adjacent side, and the color blur at the border of the screen can be eliminated.

FIG. 6 shows still another mode of the above embodiment. The screen shown in FIG. 6 is a black layered one that absorbs light at the boundary between the horizontal polarization element 13R and the vertical polarization element 13L of the polarizing plate (polarization member) 13 shown in FIG. 2 (a band that absorbs light). It is a 16-in. This effect is the same as the other aspect shown in FIG. Here, instead of the black layered material 16, thin black stripes may be printed on the boundaries between the polarizing elements 13R and 13L on the front and back of the polarizing plate 13. Further, the printing position may be between the diffusion plate 11 and the lenticular lens 12 on the surface of the diffusion plate 11.

FIG. 7 shows an image splitter type stereoscopic vision apparatus 1'of another embodiment. This stereoscopic vision device 1 '
Instead of the lenticular lens 12, an image splitter (optical member) 12 ′ is used for the diffusion plate 1 of the screen 10.
It is arranged on the first side. This image splitter 12 'is provided with a light-shielding portion 12a in a stripe shape on a glass plate.
By adjusting the distance between a and the opening 12b), the left eye L sees only the image 7L for the left eye and the right eye R sees only the image 7R for the right eye. Similarly, a stereoscopic image can be enjoyed very easily without using special polarizing glasses.

8 shows another embodiment of a stereoscopic vision apparatus 1 ". This stereoscopic vision apparatus 1" is composed of a single liquid crystal video projector 2 for a screen 10 having the same configuration as that of the embodiment shown in FIG. The image (projection light) 17 is projected from the back surface 10b. LCD video projector 2
FLC (ferroelectric liquid crystal) 18 in front of the projection lens 3 of
Has been placed. By turning on / off the voltage of the FLC 18 by the drive circuit 19, the screen 10
It is possible to rotate the polarization direction of the projection light 17 to 90 ° or to pass it as it is. Then, when the VTR 20 connected to the liquid crystal video projector 2 via the cord 8 reproduces software (not shown) containing images corresponding to the left eye and the right eye for each field, when projecting with the liquid crystal video projector 2. Projection light 1 so that the left and right are correctly projected on the screen 10 by the FLC 18.
The polarization direction of No. 7 is switched for each field. As a result, there are advantages that the same effects as those of the above-described respective embodiments are achieved and that the overall structure of the stereoscopic vision device 1 ″ becomes simpler.

[0021]

As described above, according to the present invention, the image for the left eye and the image for the right eye are projected on the back surface of the screen in a vertical stripe pattern so as to be alternately arranged, In the stereoscopic vision device in which the left eye is used for the left eye and the right eye is used for the right eye by the front optical member so as to perform stereoscopic viewing without polarizing glasses, stripes of the respective images on the back side of the screen. Polarizing members having a polarization direction orthogonal to the adjacent ones are arranged in stripes according to the pitch of the left eye, and the left eye having the polarization that matches the polarization direction is the projection light for the left eye and the right eye is the projection light for the right eye. Since the projector is configured to project the image on the screen, there is no extreme limitation on the position where the screen is viewed, unlike the conventional case, and a stereoscopic image can be viewed very easily without the use of polarizing glasses.

[Brief description of drawings]

FIG. 1 is a perspective view of a stereoscopic vision device showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a screen used in the stereoscopic vision device.

FIG. 3 is an explanatory diagram showing a state in which a stereoscopic vision is made using the stereoscopic vision device.

FIG. 4 is an explanatory diagram showing another aspect of the stereoscopic vision device.

FIG. 5 is an explanatory diagram showing another aspect of the stereoscopic vision device.

FIG. 6 is an enlarged perspective view showing a screen of still another mode of the stereoscopic vision device.

FIG. 7 is a configuration diagram of a stereoscopic vision device according to another embodiment.

FIG. 8 is a perspective view of a stereoscopic vision device according to another embodiment.

FIG. 9 is an explanatory diagram of a conventional double lenticular lens type stereoscopic vision device.

FIG. 10 is an explanatory diagram of a conventional image splitter type stereoscopic vision device.

[Explanation of symbols]

 1, 1 ', 1 "... Stereoscopic vision device 2, 2L, 2R ... Projector 7L ... Projection light for left eye 7R ... Projection light for right eye 10, 10' ... Screen 10b ... Rear surface 12 ... Lenticular lens (optical member ) 12 'image splitter (optical member) 13 ... Polarizing plate (polarizing member)

Claims (6)

[Claims] 1. A projector for projecting a left-eye image and a right-eye image alternately on a back surface of a screen in a vertical stripe pattern, and the left-eye image is projected by a front optical member. For the left eye, for the right eye, in the stereoscopic vision device that allows stereoscopic viewing without the use of polarizing glasses when viewed by the right eye, the polarization direction orthogonal to the adjacent one on the back side of the screen according to the pitch of the stripes of each image. Is arranged in a stripe shape, and the left eye having the polarized light matched with the polarization direction is configured to project the projection light for the left eye and the right eye for the right eye onto the screen by the projector. A stereoscopic vision device characterized by that. 2. The stereoscopic vision device according to claim 1, wherein
A stereoscopic vision device using a lenticular lens as the front optical member. 3. The stereoscopic vision device according to claim 1, wherein
A stereoscopic vision device using an image splitter as the front optical member. 4. The stereoscopic vision device according to claim 1, wherein polarizing plates having polarization directions orthogonal to each other are provided as the polarizing member. 5. The stereoscopic vision device according to claim 1, wherein a polarizing plate as a polarizing member is arranged on the entire back surface of the screen, and the polarization direction is rotated by 90 ° on the back surface of the polarizing plate. A stereoscopic vision device characterized by arranging layers having the property of causing every other stripe. 6. The stereoscopic vision device according to claim 1, wherein a band for absorbing light is provided at a boundary of each stripe.