JPH10253926A - Stereoscopic image display method, and stereoscopic image display device using its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce deterioration in picture quality and to obtain a continuous movement parallax. SOLUTION: Apertures 20a-20c of an aperture control part 2 are opened successively, and an image displayed on an image display part 1 is changed being synchronized with its opening. A series of opening operation from the aperture 20a to the aperture 20c is made to be performed in 1/30 second so as to impart an after image effect to observer's eye. In such a manner, the continuous movement parallax is obtained without expanding the pitch of the aperture 20. Further, since the necessity of reducing the numerical aperture of the aperture 20 is eliminated, the deterioration in the picture quality is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image display method and a three-dimensional image display apparatus using the method, and more particularly, to a three-dimensional image display method capable of obtaining continuous motion parallax with little deterioration in image quality and its method. The present invention relates to a stereoscopic image display device using the method.

[0002]

2. Description of the Related Art Various methods have been proposed for displaying a stereoscopic image. For example, there are methods using polarized glasses or shutter glasses, anaglyphs, and two-lens lenticulars. These methods are referred to as binocular methods, in which different image information is given to the left and right eyes to recognize a stereoscopic image.

First, in the method using shutter glasses, shutters (such as liquid crystal shutters) placed in front of the left and right eyes are alternately opened and closed, and an image given to the right eye and an image given to the left eye are synchronized with the opening and closing. They are displayed on the display in a time-sharing manner to obtain a three-dimensional effect. Next, FIG. 21 shows a configuration example of a stereoscopic image display device 800 using a lenticular sheet. In this stereoscopic image display device 800, an image display unit 82 for displaying an image for the right eye and an image for the left eye is provided on the focal plane of each cylindrical lens 811 constituting the lenticular sheet 81, and both of the observer K are provided. By giving parallax to the eyes, a three-dimensional effect is obtained. As the image display unit 82, a silver halide film is used for a still image, and a liquid crystal panel or a projection display (projector) is used for a moving image.

According to the above method, a stereoscopic image can be obtained relatively easily. However, since no motion parallax (a change in the image given to the observer K according to the movement of the observation position) cannot be obtained, the stereoscopic effect becomes insufficient. For such a problem, a method called a paralux panoramagram or holography is known.

FIG. 22 shows a configuration example of a three-dimensional image display device 900 using such a parallax panoramagram. This stereoscopic image display device 900 has a configuration in which an image display unit 92 is arranged behind a parallax barrier 91. The parallax barrier 91 has a slit-shaped aperture 911.
Are provided in an array. The image display unit 92
Is provided with pixels 921a to 921d for displaying a large number of images corresponding to changes in the observation positions (ad) of the observer K. According to the three-dimensional image display device 900,
The number of directional decompositions is the number of pixels (four pixels 921a to 921d)
Thus, a stereoscopic image having continuous motion parallax can be displayed. Furthermore, if the number of pixels 921a to 921d that can be observed from one aperture 911 is increased, a natural three-dimensional image with more continuous motion parallax can be displayed.

Next, FIG. 23 shows a configuration example of a three-dimensional image display apparatus 1000 using holography. First, in the creation of the holography, as shown in FIG.
, The light is separated into reference light L1 and illumination light L2. When the illumination light L2 is irradiated on the object M, the scattered light L
2 'results. The scattered light L2 'and the reference light L1
And the interference fringes are recorded on the photographic plate 1003.

Next, in reproducing holography,
As shown in FIG. 23B, the photographic dry plate 1003 is irradiated with monochromatic reproduction light L3 in the same direction as the reference light L1.
Then, the interference fringes recorded on the photographic plate 1003 serve as a diffraction grating, and generate diffracted light. This diffracted light becomes light emitted from the position where the photographing target M exists at the time of photographing. Then, a virtual image M ′ of the photographing target M is generated by the diffracted light, so that the observer K can recognize the three-dimensional image.

[0008]

However, a three-dimensional image display device 9 using the above-mentioned paralux / panoramagram.
In the case of 00, in order to realize continuous motion parallax with the same pixel density, the pitch of the apertures 911 must be increased in order to increase the number of images that can be observed from one aperture 911. For this reason, there is a problem that the light shielding portion of the parallax barrier 91 is conspicuous and the image quality is deteriorated.

On the other hand, the aperture 91 is increased by increasing the pixel density.
When the pitch of the aperture 911 is made smaller, the width of the aperture 911 becomes narrower as the pitch of the aperture 911 is reduced, and a diffraction phenomenon occurs in the aperture 911. For this reason, there is a problem that the directivity of the light beam is spread and the image quality is deteriorated.

Next, in the three-dimensional image display apparatus 1000 using holography, since a three-dimensional image obtained by using monochromatic light as reproduction light becomes a monochromatic image, and the photographic dry plate 1003 is expensive, There were problems such as being unsuitable for large screens.

In view of the above, the present invention has been made in view of the above, and it is possible to obtain a continuous motion parallax while reducing the deterioration of the image quality, and to obtain a color image as required. It is an object of the present invention to provide a stereoscopic image display method that can be configured at a low cost and a stereoscopic image display device using the method.

[0012]

In order to achieve the above object, a stereoscopic image display method according to claim 1 displays a continuous image in each direction on an image display surface, and displays the continuous image in each direction through an opening. In a three-dimensional image display method for observing and continuously obtaining a three-dimensional effect, a step of continuously displacing the opening in a moving direction of a viewpoint, and a step of synchronizing the displacement with a continuous image for each direction on the image display surface. Continuously changing.

According to a second aspect of the present invention, there is provided a three-dimensional image display device, comprising: an image display means for displaying a continuous image in each direction on an image display surface; and a moving direction of a viewpoint disposed between the image display means and an observer. A three-dimensional image display device having a plurality of apertures connected to each other and continuously obtaining a three-dimensional effect by observing the continuous images in each direction through the apertures. An opening displacing means for continuously displacing the opening in a desired direction, and a continuous image for each direction displayed on the image display surface of the image display means, continuously changing in synchronization with the displacement of the opening. Image changing means.

According to a third aspect of the present invention, there is provided a three-dimensional image display device, comprising: an image display means for displaying a continuous image in each direction on an image display surface; and a moving direction of a viewpoint disposed between the image display means and an observer. A three-dimensional image display device having a plurality of apertures connected to each other and continuously obtaining a stereoscopic effect by observing the continuous image in each direction through the apertures. The opening displacement means for continuously displacing the opening in the direction in which the opening is moved, and the continuous image for each direction displayed on the image display surface of the image display means are continuously changed in synchronization with the displacement of the opening. Image change means,
It is provided with.

According to a fourth aspect of the present invention, in the three-dimensional image display device, further, a light beam emitted from one pixel constituting the continuous image for each direction does not pass through two or more openings at the same time. And divergence angle adjusting means for adjusting the divergence angle of the light beam.

According to a fifth aspect of the present invention, in the three-dimensional image display device, the opening width of the opening is smaller than one pixel constituting the continuous image in each direction.

According to a third aspect of the present invention, in the three-dimensional image display apparatus, one pixel constituting the continuous image in each direction is color-shifted in a direction substantially orthogonal to the direction in which the eyes of the observer are arranged. It is configured by arranging pixels of three primary colors necessary for display.

According to a seventh aspect of the present invention, in the three-dimensional image display device, the image display means for displaying the continuous images in each direction includes light of three primary colors necessary for obtaining a color image. The illumination means emits light in a series, and the spatial light modulation means spatially modulates the light in synchronization with a change in the color of the light emitted from the illumination means to form an image.

The stereoscopic image display device according to claim 8, wherein the image display means for displaying the continuous image in each direction includes a light source, a two-dimensional transmission type spatial element, and the light source. And an image forming means disposed between the two-dimensional transmission type spatial element and forming a real image of the light source.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a stereoscopic image display device according to the present invention will be described in detail in the order of [Embodiment 1] to [Embodiment 8] with reference to the drawings. The present invention is not limited by the embodiment.

[Embodiment 1] FIG. 1 is a schematic configuration diagram showing a stereoscopic image display apparatus according to Embodiment 1 of the present invention. The three-dimensional image display device 100 includes an image display unit 1 and an aperture control unit 2. FIG. 2 shows a front view of the opening control unit 2. The image display unit 1 displays an image necessary for reproducing a three-dimensional image. The image display unit 1 includes a plurality of pixels 10
Are arranged in a matrix. The number of pixels 10 on the liquid crystal display element is six (10a to 10a).
10f) as a set to form a pixel group 10 '. In the description of the first embodiment, one pixel 1
0 indicates one column of pixels in a matrix. Further, a two-dimensional display such as a CRT may be used instead of the liquid crystal display element.

The aperture control unit 2 controls each pixel 1 of the image display unit 1.
Control is performed so that the light flux from 0 is emitted in a predetermined direction (see A to F in FIG. 3). As the aperture control unit 2, a transmissive liquid crystal spatial modulation element having a plurality of slit-shaped apertures 20 is used. This liquid crystal spatial modulation element has a configuration in which a liquid crystal layer is sandwiched between polarizing plates arranged in orthogonal Nicols, and is capable of modulating light transmission intensity. The pitch of the openings 20 (P1 in FIG. 1) is twice as long as the pitch of the pixels 10 (P2 in FIG. 1). 21 is a light shielding portion. Note that an element that mechanically vibrates the slit array in the horizontal direction may be used as the aperture control unit 2 instead of the liquid crystal spatial modulation element.

In the present invention, the three openings 20a-20
c open and close in order within a predetermined time. That is, any one of the openings 20 is in an open state (a state in which light can be transmitted). The luminous flux from the pixel group 10 ′ is
The light is emitted through one of the openings 0a to 20c (see FIGS. 3 to 5). Therefore, in the three-dimensional image display device 100, a continuous three-dimensional image having six directional resolutions can be obtained.

Next, the operation of the three-dimensional image display device 100 will be described with reference to FIGS. As shown in FIG.
A part of the light beam emitted from the pixel 10a is
The light beam A passes through 0a and becomes a light flux A, which is observed by the observer K. Similarly, light beams emitted from the pixels 10b to 10f partially pass through the opening 20a to become light beams B to F, which are observed by the observer K. The optical system in this case has the same configuration as the conventional parallax panoramagram (see FIG. 21). For this reason, a stereoscopic image is reproduced similarly to the conventional parallax panoramagram.

The present invention differs from the conventional parallax panoramagram in that the openings 20a to 20c are successively opened and closed as described above. Specifically, the opening 20a that has been opened is closed, and at the same time, the opening 20b is opened. Next, the opening 20b is closed and the opening 20c is opened. And the opening 20c
Is closed and the opening 20a is opened again. The image on the image display unit 1 is also changed in synchronization with the opening and closing operations of the openings 20a to 20c.

As shown in FIG. 4, when the opening 20a is closed and the adjacent opening 20b is opened, a set of six pixels (pixel 10) forming an image to be viewed by the observer K is displayed.
a to 10f) are synchronized with the displacement from the opening 20a to the opening 20b, and the next set of six pixels (pixel 10c)
-10f, 10a ', 10b').

Further, as shown in FIG.
b is closed and the next opening 20c is opened.
A set of six pixels (pixels 10c to 10f, 10a ', 10b') forming an image to be viewed by the observer K is synchronized with the displacement from the opening 20b to the opening 20c, and Set (pixels 10e, 10f, 10a 'to 10d')
Changes to Although the above description has been made with a focus on one opening and pixel group, the same operation is performed in any other opening and pixel group.

Further, the above series of operations (FIGS. 3 to 5)
Is repeatedly performed at such a speed as not to give the observer K a flickering feeling. For example, the opening / closing operation from the opening 20a to the opening 20c is repeated 30 times per second. As a result, an afterimage occurs at a position corresponding to each opening (the position of the observer K in FIGS. 3 to 5), and the observer K can observe a three-dimensional image at each of the positions. Therefore, even if the observer moves to the right in the figure, the stereoscopic image can be observed in a favorable state by the afterimage formed through the opening 20b. Further, even if the observer moves further to the right in the figure, the afterimage formed through the opening 20c causes
A stereoscopic image can be observed in a favorable state.

As described above, according to the three-dimensional image display device 100, the opening 20 is continuously opened and closed, so that the opening 20 (corresponding to the aperture in FIG. 21) can be continuously opened without increasing the pitch. A high motion parallax can be obtained. The opening ratio of the opening 20 (opening width P3 / opening pitch P
Since it is not necessary to reduce 1), the size of the light-shielding portion can be suppressed, and since there is no need to reduce the opening width, the diffraction phenomenon in the opening 20 is less likely to occur. Further, since a high-definition three-dimensional image can be obtained and the apparatus can be configured at low cost, a three-dimensional effect equivalent to holography can be obtained on a large screen.

Further, in the stereoscopic image display device 100,
The so-called six eyes (the number of directions is six) in which the light beams emitted from the six pixels 10a to 10f pass through one opening 20.
However, if the number of pixels passing through one opening 20 is further increased, a three-dimensional image can be reproduced more naturally. Even if the number of openings 20 is increased, a three-dimensional image can be reproduced more naturally.

[Embodiment 2] In addition, motion parallax can be obtained not only in the horizontal direction (the direction in which the observer's eyes are arranged) but also in the vertical direction (in a direction orthogonal to the direction in which the observer's eyes are arranged). It may be. FIG. 6 shows a configuration of a stereoscopic image display device 200 according to the second embodiment. The three-dimensional image display device 200 includes an image display unit 201 and an aperture control unit 202. The aperture control unit 202 is composed of a transmissive liquid crystal spatial modulation device in which the apertures 220 are arranged in a matrix.
The openings 220 are sequentially opened with a constant vertical and horizontal interval from the adjacent openings 220. FIG.
FIG. 3 is a schematic view showing an arrangement state of FIG. Thus, the opening 22
0a to 220i are arranged in a matrix of 3 rows and 3 columns. This opening 220 is formed by opening 22
Opened in the order of 0i. In contrast, the image display unit 2
01 uses a liquid crystal display element in which a plurality of pixels are arranged in a matrix, as in the first embodiment.

FIG. 8 is an explanatory diagram showing the operation of the three-dimensional image display device 200. The three-dimensional image display device 200
Are the same as those in the first embodiment (see FIGS. 3 to 5). Next, in the vertical operation of the three-dimensional image display device 200, for example, a part of a light beam emitted from the pixel 210a passes through the opening 220g and becomes a light beam A, which is observed by the observer K. Similarly, the pixels 210b to 210b
A part of the light beam emitted from f passes through the opening 220g and becomes light beams B to F, which are observed by the observer K.

Next, as shown in FIG.
When 20 g is closed and the upper opening 220 d is opened, a set of six pixels (pixels 210 a to 210 f) forming an image to be viewed by the observer K is transferred from the opening 220 g to the opening 220 d. In synchronization with the displacement, the next set of six pixels (pixels 210c to 210f, 210a ', 210
b ′).

Further, as shown in FIG.
When 20d is closed and the next opening 220a is opened, a set of six pixels (pixels 210c to 210f, 210a ', 210
b ′) is the next set of pixels (pixels 210e and 210e) in synchronization with the displacement from the opening 20d to the opening 220a.
f, 210a 'to 210d'). Although the above description has been made with a focus on one opening and pixel group, the same operation is performed in any other opening and pixel group.

According to the above three-dimensional image display device 200,
A high-definition three-dimensional image can be obtained not only in the horizontal direction but also in the vertical direction. Further, continuous motion parallax is obtained with little deterioration in image quality. Further, a three-dimensional effect comparable to holography can be easily obtained.

[Embodiment 3] The stereoscopic image display device 2
00 shows a stereoscopic display of six eyes in both the vertical and horizontal directions. However, considering that humans are less sensitive to parallax in the vertical direction than in the horizontal direction, the number of multiview images in the horizontal direction is Thus, the number of multiview displays in the vertical direction may be reduced. For example, multi-view display with six eyes in the horizontal direction and four eyes in the vertical direction is performed. FIG. 11 shows a stereoscopic image display device 300 that performs such multi-view display. FIG. 12 is a schematic diagram showing the arrangement of the openings of the three-dimensional image display device 300. The opening control unit 302 has a configuration in which the openings 320 are arranged in three rows and two columns (opening portions 320a to 320f).

The openings 320a to 320f are
Opening is performed in the order of 0a to 320f. The image display unit 301 uses a liquid crystal display element in which a plurality of pixels are arranged in a matrix, as in the first embodiment. The operation of the three-dimensional image display device 300 is the same as that of the above-described second embodiment except that the stereoscopic image display device 300 has four eyes in the vertical direction. In the case of displaying a two-eye stereoscopic image in the vertical direction, the opening 32
It is only necessary to open 0 in order in the horizontal direction.

[Embodiment 4] By the way, Embodiment 1
If the divergence angle of the luminous flux emitted from each of the pixels 10 constituting the image display unit 1 is large, the luminous flux from one pixel 10 will pass through the openings 20 other than the opening 20 that should originally transmit. For this reason, there is a possibility that an extra light beam is included in the reproduced three-dimensional image and the image quality is degraded. Therefore, by keeping the divergence angle of the light emitted from each pixel of the image display unit 1 at a constant angle, the luminous flux from one pixel is in an open state.
The two openings 20 were not simultaneously transmitted.

FIG. 13 shows such a stereoscopic image display device 4.
00 is shown. The three-dimensional image display device 400 includes an image display unit 401 and an opening control unit 402. The image display unit 401 includes a liquid crystal display panel 411 and a backlight 412.
A micro lens array 413 and a pinhole array 414 are arranged between the two. Opening control unit 402
Is the same as in the second embodiment. When such a configuration is adopted in the first embodiment, a lenticular sheet may be used instead of the microlens array 413. In this case, the opening control unit 412 includes the first embodiment.
The same slit shape as that described above is used. The divergence angle of the light beam is determined by the size of the pinhole of the pinhole array 413 and the N.D. A. (Numerical aperture).

[Fifth Embodiment] The image quality of a reproduced image is affected by the size of the opening. As shown in FIG. 14, a crosstalk area C occurs in the reproduced image. This is because a light beam emitted from one pixel 510a 'overlaps with a light beam emitted from another pixel 510b'. The crosstalk area C increases in proportion to the size of the opening 520 '. For this reason, if the width of the opening 520 ′ is larger than the width of the pixel 510 ′, all the emitted light fluxes
, And the images are overlapped to form a blurred reproduced image. Therefore, in the fifth embodiment, the width of the opening is set smaller than the width of the pixel. FIG. 15 shows such a stereoscopic image display device 500. The three-dimensional image display device 500 includes an image display unit 501 including a liquid crystal display element in which a plurality of pixels are arranged in a matrix, and an opening control unit 502 having a plurality of slit-shaped openings 520, as in the first embodiment. Consists of

In the three-dimensional image display device 500, the width of the opening 520 is set smaller than the width of the pixel 510.
At a position separated by a certain distance D from the screen, a light beam (only a light beam emitted from one pixel 510) outside the crosstalk area is observed. For this reason, a clear reproduced image can be obtained. In addition, as shown in FIG. 16, the width of the opening 520 is changed not only in the horizontal direction but also in the vertical direction.
It may be set smaller than the width of 0. If you do this,
Since the crosstalk area C also becomes smaller in the vertical direction, a clearer reproduced image can be obtained.

In the above configuration, the aperture control unit 502
The present invention is also effective when a transmission type liquid crystal spatial light modulator having openings arranged in a matrix is used (see Embodiment 2).

[Embodiment 6] In order to reproduce a color stereoscopic image, the image display section 1 may use color pixels. FIG. 17 shows such an image display unit 601. This image display unit 601 is a colorized version of the configuration of the first embodiment using the slit-shaped opening, and the RGB pixels 610r, 610g, and 610b are arranged in a direction perpendicular to the direction in which the eyes of the observer K are arranged. They are arranged and one pixel 610 is formed. The aperture control unit (not shown) uses the liquid crystal spatial modulation device used in the first embodiment.

This makes it possible to display a color three-dimensional image that cannot be obtained by holography.
Further, by the same operation as in the first embodiment, continuous motion parallax can be obtained by color display with little deterioration in image quality.

[Embodiment 7] In addition, the display of each color of RGB may be switched in a time-division manner to reproduce a color stereoscopic image not only in the horizontal direction but also in the vertical direction.
FIG. 18 shows the configuration of such a stereoscopic image display device 700. The three-dimensional image display device 700 includes an image display unit 701
And an aperture control unit 702. Image display section 7
Reference numeral 01 denotes an optical system that performs color display in a time-sharing manner. Note that the aperture control unit 702 uses the same transmissive liquid crystal spatial modulation element as in the second embodiment.

Light from a metal halide lamp 711 as a light source is shaped in parallel by a lens 712 and passes through a rotary color filter 713 of three primary colors. The rotary color filter 713 is driven by a motor 714 and rotates at a constant speed. The rotating color filter 713 is the same as that shown in FIG.
As shown in FIG. 9, it is divided into three equal parts of the three primary colors of RGB.
Therefore, the light transmitted through the rotary color filter 713 is
The three colors of RGB change in a time-sharing manner according to the motor rotation speed.

Subsequently, the light transmitted through the rotary color filter 713 is reflected by the mirror 715, is projected on the Fresnel lens 717 through the lens 716, and becomes the backlight of the image display plate 718. The image display plate 718 is formed of a transmissive liquid crystal display element. This liquid crystal display element displays images of each color of RGB in synchronization with the time division. Light beams emitted from the pixels of the image display unit 701 in a time-division manner pass through the aperture of the aperture control unit 702 and are observed by an observer (not shown).

In this manner, a color three-dimensional image can be displayed not only in the horizontal direction but also in the vertical direction. In addition, a color stereoscopic image can be obtained with the same pixel density as in the case of a monochromatic image.

[Eighth Embodiment] FIG. 20 shows an eighth embodiment.
The three-dimensional image display device 750 includes a white light source (backlight) 781 and a two-dimensional liquid crystal spatial modulation element 782.
And a white light source 781 and a two-dimensional liquid crystal spatial modulator 78
And a Fresnel lens 783 arranged between the two. Note that the opening control unit 770 is used in the second embodiment.
A transmissive liquid crystal spatial light modulator similar to that described above is used.

By inserting the Fresnel lens 783, a real image of the white light source 781 is formed on the observer K side, and the light emitted from each pixel of the two-dimensional liquid crystal spatial modulation element 782 has a predetermined divergence angle. While being controlled, the amount of light traveling in the direction of the observer K is effectively increased. As described in the above-described fourth embodiment, when the divergence angle of the light emitted from each pixel of the liquid crystal spatial light modulator (two-dimensional liquid crystal spatial light modulator 782) is larger than necessary, unnecessary light rays are generated in displaying a stereoscopic image. The light is emitted from the aperture control unit 770.
The presence of such a light beam indicates that the light of the white light source 781 is not used effectively. As shown in FIG. 20, if an optical system that forms a real image of the white light source 781 at a predetermined magnification via the Fresnel lens 783 is configured, unnecessary light rays can be effectively removed.

In an optical system that modulates the intensity of light using a liquid crystal spatial modulation element, the absorption of light by a polarizing plate increases. Therefore, it is important to effectively use light as in the eighth embodiment.

As described above, according to the eighth embodiment, the divergence angle of the light emission of the light source is controlled and the observer K
, The light use efficiency of the light source can be improved.

[0053]

As described above, according to the three-dimensional image display method (claim 1) and the three-dimensional image display device (claim 2) of the present invention, the opening means is continuously displaced in the moving direction of the viewpoint. The continuous image for each direction on the image display surface is continuously changed in synchronization with the displacement. If you do this,
Since the aperture ratio can be reduced, the sense of incongruity due to the light shielding portion is eliminated. Further, since it is not necessary to reduce the size of the opening, deterioration in image quality due to the diffraction phenomenon can be prevented. In addition, since a high-definition stereoscopic image can be obtained and the apparatus can be configured at low cost, a stereoscopic effect equivalent to holography can be obtained on a large screen.

Further, in the stereoscopic image display device of the next invention (claim 3), the opening means is continuously displaced in a direction orthogonal to the direction in which the eyes of the observer are arranged, and the image display surface is synchronized with this displacement. The continuous image for each direction is continuously changed. With this configuration, the same effect as described above can be obtained not only in the direction in which the eyes are arranged but also in a direction orthogonal to the direction. In addition, when used in combination with the above configuration, a very high-resolution stereoscopic image can be obtained by a synergistic effect.

In the three-dimensional image display device according to the present invention (claim 4), the luminous flux emitted from one pixel constituting the continuous image in each direction is diverged so that the luminous flux does not pass through two or more aperture means at the same time. Adjusted the corner. For this reason, unnecessary light flux for reproducing the stereoscopic image is not generated, and the image quality of the stereoscopic image is prevented from deteriorating.

In the three-dimensional image display device according to the next invention (claim 5), the opening width of the opening means is made smaller than one pixel constituting a continuous image in each direction. Therefore, a clear stereoscopic image can be obtained with a reduced crosstalk area.

According to the three-dimensional image display device of the present invention (claim 6), one pixel constituting a continuous image in each direction is defined by three primary color pixels required for color display in the direction in which the eyes of the observer are arranged. And arranged in a direction perpendicular to the direction. For this reason, color stereoscopic display, which cannot be obtained by holography, can be performed.

According to the three-dimensional image display device of the present invention, light of three primary colors necessary for obtaining a color three-dimensional image is emitted in time series, and this light is synchronized with the color change. By modulating them spatially, continuous images in each direction are displayed. Therefore, a color stereoscopic image can be obtained with the same pixel density as in the case of a monochromatic image.

Further, according to the stereoscopic image display apparatus of the next invention (claim 8), the image forming means arranged between the light source and the two-dimensional transmission type spatial element to form a real image of the light source, The real image of the light source is formed at a predetermined magnification. For this reason, unnecessary light rays can be effectively removed. In addition, the divergence angle of light emission of the light source can be controlled, and the amount of light directed to the observer can be increased to improve the light use efficiency of the light source.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a stereoscopic image display device according to Embodiment 1 of the present invention.

FIG. 2 is a structural explanatory view of an aperture control unit shown in FIG. 1;

FIG. 3 is an explanatory diagram showing an operation of the stereoscopic image display device shown in FIG.

FIG. 4 is an explanatory diagram showing an operation of the stereoscopic image display device shown in FIG.

FIG. 5 is an explanatory diagram showing an operation of the stereoscopic image display device shown in FIG.

FIG. 6 is a configuration diagram showing a stereoscopic image display device according to Embodiment 2 of the present invention.

FIG. 7 is a schematic diagram illustrating an arrangement state of openings of the opening control unit illustrated in FIG. 6;

FIG. 8 is an explanatory diagram showing an operation of the stereoscopic image display device using the aperture control unit shown in FIG.

FIG. 9 is an explanatory diagram showing an operation of the stereoscopic image display device using the aperture control unit shown in FIG.

FIG. 10 is an explanatory diagram showing an operation of the stereoscopic image display device using the aperture control unit shown in FIG.

FIG. 11 is a configuration diagram showing a stereoscopic image display device according to Embodiment 3 of the present invention.

FIG. 12 is a schematic diagram illustrating an arrangement state of openings of the opening control unit illustrated in FIG. 11;

FIG. 13 is a configuration diagram showing a stereoscopic image display device according to Embodiment 4 of the present invention.

FIG. 14 is an explanatory diagram showing an adverse effect due to crosstalk.

FIG. 15 is a configuration diagram showing a stereoscopic image display device according to Embodiment 5 of the present invention.

16 is a configuration diagram showing a modification of the stereoscopic image display device shown in FIG.

FIG. 17 is a structural explanatory view showing an image display unit of a stereoscopic image display device according to Embodiment 6 of the present invention.

FIG. 18 is a configuration diagram showing a stereoscopic image display device according to Embodiment 7 of the present invention.

FIG. 19 is a top view showing the rotary color filter shown in FIG. 18;

FIG. 20 is a configuration diagram illustrating a stereoscopic image display device according to an eighth embodiment of the present invention.

FIG. 21 is a configuration diagram showing a known stereoscopic image display device using a lenticular sheet.

FIG. 22 is a configuration diagram showing a conventional stereoscopic image display device using a parallax panoramagram.

FIG. 23 is a configuration diagram illustrating a stereoscopic image display device using holography.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 stereoscopic image display device 1 image display unit 2 aperture control unit 10 pixel 20 aperture 200 stereoscopic image display device 201 image display unit 202 aperture control unit 300 stereoscopic image display device 301 image display unit 302 aperture control unit 400 stereoscopic image display device 401 Image display unit 402 Opening control unit 411 Liquid crystal display panel 412 Backlight 413 Micro lens array 414 Pinhole array 500 Stereoscopic image display device 501 Image display unit 502 Opening control unit 601 Image display unit 700 Stereoscopic image display device 701 Image display unit 702 Opening Control unit 711 Metal halide lamp 712 Lens 713 Rotary color filter 714 Motor 750 Stereoscopic image display device 760 Image display unit 770 Opening control unit 781 White light source (backlight) 782 Two-dimensional liquid crystal spatial light modulator 78 Fresnel lens

Claims (8)

[Claims] 1. A continuous image for each direction is displayed on an image display surface,
In the stereoscopic image display method for observing the continuous image in each direction through an opening and continuously obtaining a stereoscopic effect, a step of continuously displacing the opening in a moving direction of a viewpoint; Continuously changing a continuous image for each direction on the image display surface. 2. An image display means for displaying a continuous image in each direction on an image display surface, and a plurality of openings arranged between the image display means and an observer and provided in a plurality in a moving direction of a viewpoint. In a three-dimensional image display device that continuously obtains a three-dimensional effect by observing the continuous images in each direction through the opening, the opening is continuously arranged in a direction substantially parallel to the direction in which the eyes of the observer are arranged. The image forming apparatus further comprises: an opening displacement means for displacing; and an image changing means for continuously changing a continuous image in each direction displayed on an image display surface of the image display means in synchronization with the displacement of the opening. Stereoscopic image display device. 3. An image display means for displaying a continuous image in each direction on an image display surface, and a plurality of openings arranged between the image display means and an observer and provided in a plurality in a moving direction of a viewpoint. In a three-dimensional image display device that continuously obtains a three-dimensional effect by observing the continuous image in each direction through the opening, the opening is continuously arranged in a direction substantially orthogonal to the direction in which the eyes of the observer are arranged. The image forming apparatus further comprises: an opening displacement means for displacing; and an image changing means for continuously changing a continuous image in each direction displayed on an image display surface of the image display means in synchronization with the displacement of the opening. Stereoscopic image display device. 4. A divergence angle adjusting means for adjusting a divergence angle of the light beam so that the light beam emitted from one pixel constituting the continuous image for each direction does not pass through two or more openings at the same time. Claim 2 or Claim 3 characterized by the following:
3. The stereoscopic image display device according to 1. 5. The three-dimensional image display device according to claim 2, wherein an opening width of the opening is smaller than one pixel forming the continuous image in each direction. . 6. The image forming apparatus according to claim 1, wherein one pixel constituting the continuous image for each direction is configured by arranging pixels of three primary colors necessary for color display in a direction substantially orthogonal to a direction in which an observer's eyes are arranged. The stereoscopic image display device according to any one of claims 2 to 5. 7. An image display means for displaying a continuous image for each direction, comprising: illuminating means for emitting light of three primary colors necessary for obtaining a color image in a time series; and color change of light emitted from the illuminating means. The three-dimensional image display device according to any one of claims 2 to 5, further comprising: a spatial modulation unit that spatially modulates the light in synchronization and forms an image. 8. An image display means for displaying the continuous image for each direction is disposed between a light source, a two-dimensional transmissive spatial element, and the light source and the two-dimensional transmissive spatial element, and a real image of the light source is provided. 4. The three-dimensional image display device according to claim 2, further comprising: an image forming means for forming the image.