JP2963005B2 - 3D image display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional video display device, and more particularly to a three-dimensional video display device which is simple and inexpensive and enables stereoscopic viewing even if the viewpoint is shifted in the left-right direction. .

[0002]

2. Description of the Related Art For example, as shown in FIG. 1, an image projected from two projectors 101L and 101R on the left and right is formed on an image forming surface 103 made of a transparent plate or a diffusion plate by an incident side lenticular lens 102, and this image is formed. There is a stereoscopic image display device in which the image is observed through the emission side lenticular lens 104.

As shown in FIG. 2 on an enlarged scale, each of the projectors 101L and 101R has a lenticular lens 1 on an incident side.
02, the light incident on each convex lens element 102a is converged on the image forming surface 103 at a predetermined interval corresponding to the interval between the projectors 101L and 101R into two pixels RL. Any projector 1 in between
A region where no outgoing light of 01R / 101L is incident, that is, a black region B is formed.

[0004]

For this reason, the black area B is not observed by the eyes of the observer located at the correct observation position, and a stereoscopic vision can be obtained. There is a problem that the black area B is observed and the image cannot be observed.

In order to solve this problem, one or more pairs of right and left projectors are additionally provided so that the image emitted from each of the left (or right) projectors 101L (101R) can be displayed on the image forming surface 103 by another projector. The same image is projected on the black area B of the image of the left (or right) projector 101L (101R), and the image forming surface 103 is projected.
If the black area B is eliminated above, when the viewpoint shifts left and right, another left (or right) projector 101L (1
01R), the projected image can be observed,
Although stereoscopic vision can be performed, in this case, since a large number of projectors are used, the entire apparatus tends to be complicated and expensive.

The present invention has been made in view of the above circumstances, and provides a stereoscopic image display apparatus which is simple and inexpensive and enables stereoscopic viewing even if the viewpoint is shifted in the left-right direction. It is intended to do so.

[0007]

According to the present invention, an image projected from two projectors is formed on an image forming surface by an incident-side lenticular lens, and the image is observed through an exit-side lenticular lens. In the stereoscopic image display device, in order to achieve the above-described object, a spectroscopic device is provided that divides outgoing light of each projector into a plurality of spectral components and causes each spectral component to enter a black region of another spectral component on the image forming surface. It is a feature.

[0008]

According to the present invention, without providing a plurality of pairs of projectors,
2 projectors and 2 provided corresponding to each
Only two spectrometers are provided, and the configuration is simple and inexpensive.

In the present invention, the light emitted from each projector is divided into a plurality of light components by two spectroscopes, and each light beam is incident on a black region of another light spectrum on the image forming surface. There is no black area on the surface, and even if the viewpoint is moved to the left or right, it is possible to stereoscopically view an image by any of the spectral components.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A stereoscopic video apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

A stereoscopic video apparatus according to an embodiment of the present invention shown in the principle diagram of FIG. 3 includes a projector 1L for projecting a left-eye image and a projector 1R for projecting a right-eye image.
And a screen S having an entrance-side lenticular lens 2, a diffusion plate 3, and an exit-side lenticular lens 4.
Further, the light emitted from each of the projectors 1L and 1R is divided into a plurality of light components between each of the projectors 1L and 1R and the incident-side lenticular lens 2, and each light component is incident on a black region of another light component on the diffusion plate 3. Spectrometer 5L ・ 5
R is provided.

Although the number of spectroscopy of the spectroscopic devices 5L and 5R is not particularly limited, a case where the light emitted from each of the projectors 1L and 1R is divided into two spectroscopy is shown here for the sake of simplicity. I have.

The configuration of each of the spectroscopic devices 5L and 5R is such that the light emitted from each of the projectors 1L and 1R is divided into a plurality of spectroscopy, and each of the spectroscopy is made to enter a black region of another spectroscope on the diffusion plate 3. However, in this case, one half mirror 6L and 6R and one total reflection mirror 7L and 7R are used here so that the left-right relation of the split images is the same.
R, the light emitted from each of the projectors 1L and 1R is split into two by half mirrors 6L and 6R.
The spectrum transmitted through the 6R and the spectrum reflected by the half mirrors 6L and 6R and further totally reflected by the total reflection mirrors 7L and 7R are incident on the incident side lenticular lens 2 at equal pitch in the horizontal direction. .

As shown in an enlarged view in FIG. 4, the light reflected by the left-eye half mirror 6L and the total reflection mirror 7L is diffused by one lens element 2a of the incident-side lenticular lens 2 so as to correspond to the lens element 2a. From the left end of the portion of the plate 3, an image is formed on a pixel region L 1 of １ ／ pitch of the lenticular lens 2, and the light transmitted through the left-eye half mirror 6 L is divided by 1 / の of the lenticular lens 2 continuous to the right of the pixel region L 1. An image is formed on a pixel area L2 having four pitches.

The light transmitted through the right-eye half mirror 6R is transmitted by one lens element 2a of the incident-side lenticular lens 2 to a diffusion plate 3 corresponding to the lens element 2a.
Is formed on the pixel region R1 of the レ ン チ pitch of the lenticular lens 2 which is continuous with the right end of the pixel regions L1 and L2 where the left-eye image of the portion is formed, and is reflected by the right-eye half mirror 6R and the total reflection mirror 7R. The divided light is distributed to the pixel region R1.
Is formed in a pixel region R2 of a ピ ッ チ pitch of the lenticular lens 2 that is continuous to the right of the lenticular lens 2.

When the image without the black area on the diffusion plate 3 is observed through the lenticular lens 4 on the emission side in this way, the viewpoint is viewed from the left and right from the position where the image transmitted through each half mirror 6L, 6R can be observed. When this image is moved to a position where it cannot be seen, the total reflection mirror 7L
The image reflected by 7R can be observed. Conversely, when the viewpoint is moved from the position where the image reflected by the total reflection mirrors 7L and 7R can be observed to the position where the image cannot be seen in the left and right direction, the image transmitted through each half mirror 6L and 6R can be observed.

When the optical paths are divided in this manner, the stripes (width of each pixel in the horizontal direction) become sharp, so that the crosstalk of the image is eliminated.

As described above, according to this stereoscopic image display device, by providing the inexpensive spectroscopic devices 5L and 5R without adding an expensive projector, stereoscopic viewing can be performed even if the viewpoint is shifted in the left-right direction. Moreover, the configuration is simple and the cost is low.

The spectroscopes 5L and 5R have one half mirror 6L and 6R and one total reflection mirror 7L and 7R.
In addition, a pair of total reflection mirrors can be arranged on the optical path of the light transmitted through the half mirrors 6L and 6R so that the optical path length of each light can be the same. It is.

Further, the half mirror 6 of the spectroscopes 5L and 5R is used.
It is also possible to use a beam splitter instead of L · 6R.

Of course, it is also possible to use, as the spectroscopes 5L and 5R, those that split the light emitted from each of the projectors 1L and 1R into three or more light beams.

[0022]

As described above, according to the three-dimensional image display device of the present invention, the light emitted from each projector is divided into a plurality of light components by the spectroscopic device, and each light component is separated into another light component on the image forming surface. The black region on the image forming surface can be eliminated, so that even if the viewpoint is shifted in the left-right direction, stereoscopic vision can be achieved.

In addition, it is only necessary to add an inexpensive spectroscope without adding an expensive projector, so that the configuration can be simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a conventional example.

FIG. 2 is an enlarged plan view of a main part of a conventional example.

FIG. 3 is a principle diagram of one embodiment of the present invention.

FIG. 4 is an enlarged plan view of a main part of one embodiment of the present invention.

[Explanation of symbols]

 1L ・ 1R Projector 2 Incident-side lenticular lens 3 Diffusion plate 4 Exit-side lenticular lens 5L ・ 5R Spectroscope 6L ・ 6R Half mirror 7L ・ 7R Total reflection mirror

Claims (1)

(57) [Claims] 1. A stereoscopic image display device in which images projected from two projectors are formed on an image forming surface by an incident-side lenticular lens, and the images are observed through an exit-side lenticular lens. A three-dimensional image display device, comprising: a spectroscopic device that divides outgoing light into a plurality of spectral components and causes each of the spectral components to enter a black region of another spectral component on the image forming surface.