JP2000214413A - Three-dimensional display method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a three-dimensional display method by which a moving picture is displayed without using spectacles by generating a two-dimensional image obtained by projecting the image of an object to be displayed from the line-of-sight direction of an observer, respectively independently changing the luminance of the generated two-dimensional image for every display surface and displaying the two-dimensional images on plural display surfaces. SOLUTION: Plural surfaces, for example, the surfaces (101 and 102) are set in front of the observer 100 so as to generate the images converted to 2D (105 and 106) being the image obtained by projecting the image of a three-dimensional object 104 to be presented to the observer 100 to the surfaces (101 and 102) from the gazing direction of both eyes of the observer 100. Synthesizing technique by using computer graphics is mentioned as a method for generating the image converted to 2D. The images converted into 2D (105 and 106) are displayed on both surfaces 101 and 102 so as to be superimposed when they are viewed from one point on a line linking the right eye and the left eye of the observer 100. Then, the luminance of each of the images converted into 2D (105 and 106) is changed corresponding to the depth position of the object 104 while keeping the total luminance in the case of viewing from the observer 100 constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a three-dimensional stereoscopic image,
The present invention relates to a three-dimensional display device capable of electronically reproducing a moving image with a reduced amount of information.

[0002]

2. Description of the Related Art A liquid crystal shutter glasses system shown in FIG. 27 is well known as a conventional device which is electrically rewritable, has a small amount of information, and enables three-dimensional display of moving images.
Hereinafter, the principle of the liquid crystal shutter glasses system will be described. In this liquid crystal shutter glasses system, a camera (6
02, 603), the three-dimensional object 601 is photographed from different directions, and images (parallax images) of the three-dimensional object 601 photographed from different directions are generated. Camera (602, 603)
Are synthesized by the video signal conversion device 604 into one video signal, and the two-dimensional display device (for example,
(CRT display device) 605. Observer 607,
2D display device 605 with liquid crystal shutter glasses 606
Observe the video. Here, when the two-dimensional display device 605 is displaying an image from the camera 603, the left side of the liquid crystal shutter glasses 606 is in a non-transmissive state, and the right side is in a transmissive state.
When the two-dimensional display device 605 is displaying an image from the camera 602, the left side of the liquid crystal shutter glasses 606 is in a transmissive state, and the right side is in a non-transmissive state. When the operation is switched at a high speed, it is felt that a parallax image can be seen by both eyes due to an afterimage effect of the eyes. Therefore, stereoscopic viewing by binocular parallax becomes possible. In addition, as a conventional device that is electrically rewritable, has a small amount of information, and enables three-dimensional display of moving images,
A volume type system shown in FIG. 28 has also been proposed. Hereinafter, the principle of this volume type system will be described. In this volume type system, as shown in FIG.
1 is sampled in the depth direction as viewed from the observer to form a collection 612 of two-dimensional images, and the collection 612 of the two-dimensional images is formed by using a volume type three-dimensional display device 613 shown in FIG. The three-dimensional re-development 614 is reconfigured by arranging in the depth direction again by time division.

[0003]

However, the liquid crystal shutter glasses system shown in FIG. 27 requires liquid crystal shutter glasses 606, which is very unnatural in a video conference or the like. was there. Also,
Among the physiological factors of stereoscopic vision, a great contradiction arises between binocular parallax, convergence, and focus adjustment. That is, in the liquid crystal shutter glasses system shown in FIG. 27, although the binocular parallax and the convergence can be almost satisfied, there is a problem that since the focus surface is on the display surface, eyestrain is caused due to this contradiction.
In the volume type method shown in FIG. 28, the depth position of the three-dimensional object 611 to be reproduced is close to the surface on which an image is actually displayed and is sandwiched between the surfaces. Unlike the spectacle method, it is possible to suppress inconsistency between binocular parallax, convergence, and focus adjustment. However, in this volume type method, since the position is discrete in the depth direction, it is difficult to reproduce a three-dimensional object at an intermediate position or a three-dimensional object that changes greatly in the depth direction. there were. An object of the present invention is to provide a three-dimensional display method and apparatus capable of displaying a moving image without using glasses. It is another object of the present invention to provide a three-dimensional display method and apparatus capable of suppressing inconsistency between physiological factors of stereoscopic vision. Another object of the present invention is to provide an electrically rewritable three-dimensional display method and apparatus. The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0004]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows. That is, the present invention is a three-dimensional display method for generating a three-dimensional stereoscopic image by displaying a two-dimensional image on each of a plurality of display surfaces having different depth positions, and is located at different depth positions as viewed from an observer. For multiple display surfaces,
A two-dimensional image is generated by projecting the display target object from the line of sight of the observer, and the brightness of the generated two-dimensional image is changed independently for each of the display surfaces, to generate the generated two-dimensional image. Characters are displayed on a plurality of display surfaces. Further, according to the present invention, when the display target object is an object displayed at a depth position close to the observer, the two-dimensional image of the two-dimensional image to be displayed on the display surface close to the observer among the plurality of display surfaces. Increase the brightness, lower the brightness of the two-dimensional image displayed on the display surface far from the observer, and, when the display target object is an object displayed at a depth position far from the observer, the plurality of Wherein the brightness of the two-dimensional image displayed on the display surface closer to the observer among the display surfaces is reduced, and the brightness of the two-dimensional image displayed on the display surface far from the observer is increased. Further, the present invention displays the two-dimensional image on the plurality of display surfaces so that the two-dimensional image overlaps when viewed from one point on a line connecting the right eye and the left eye of the observer, and It is characterized in that the overall luminance to be viewed is equal to the luminance of the original display target object. Further, the present invention displays the two-dimensional image on the plurality of display surfaces so that the two-dimensional image overlaps when viewed from a point on a line connecting the right eye and the left eye of the observer, and displays a display target object. When the depth position is far from the observer, the overall brightness seen by the observer is lower than when the depth position is near. Further, the invention is characterized in that one point on a line connecting the right eye and the left eye of the observer is one point between the right eye and the left eye. Further, the present invention is characterized in that one point on a line connecting the right eye and the left eye of the observer is a center point of the right eye and the left eye. Further, the present invention relates to a two-dimensional image displayed on the plurality of display surfaces so that the two-dimensional images displayed on the plurality of display surfaces overlap each other when viewed from a point on a line connecting the right eye and the left eye of the observer. It is characterized in that enlargement / reduction deformation is applied in the direction. Further, according to the present invention, the depth position between the display surfaces displaying the two-dimensional image, a plurality of two-dimensional images displayed on those display surfaces for the same display target object,
It is characterized in that it is a range having a common area when viewed by a single eye from the positions of the right and left eyes of the observer. Also, the present invention provides a method for displaying a depth position between display surfaces displaying the two-dimensional image, a plurality of two-dimensional images displayed on the display surfaces for the same display target object, as viewed from an observer. It is characterized in that focusing on the depth position of the object is within a range in which the image is less blurred than focusing on the plurality of display surfaces. Further, the present invention is characterized in that a three-dimensional moving image is generated by sequentially switching the two-dimensional image. Further, the present invention is a case where the two-dimensional image includes a plurality of object images moving in the depth direction, and when the moving direction of the object is a direction approaching the observer, the switching of the two-dimensional image Synchronously, sequentially increase the brightness of the object image displayed on the display surface closer to the observer of the plurality of display surfaces, sequentially lower the brightness of the object image displayed on the display surface far from the observer, Further, when the moving direction of the object is a direction away from the observer, in synchronization with the switching of the two-dimensional image, the object image displayed on the display surface closer to the observer among the plurality of display surfaces. The luminance is sequentially reduced, and the luminance of the object image displayed on the display surface far from the observer is sequentially increased.

The present invention also relates to a three-dimensional display device, which is a two-dimensional display device which projects an object to be displayed from a line of sight of an observer on a plurality of display surfaces at different depth positions as viewed from the observer. First means for generating an image, second means for displaying the two-dimensional image generated by the first means on a plurality of display surfaces at different depth positions as viewed from an observer,
Third means for independently changing the luminance of the two-dimensional image displayed on the plurality of display surfaces for each display surface. Also, in the present invention, the second means may include a plurality of two-dimensional display devices, and a two-dimensional display device other than the two-dimensional display device arranged at a depth position farthest from an observer among the plurality of two-dimensional display devices. In combination with the apparatus, the apparatus is characterized in that the two-dimensional display apparatus is configured to include a partial reflecting mirror that arranges the display of each two-dimensional display apparatus as an image on the line of sight of the observer. Also, in the present invention, the second means may include a plurality of two-dimensional display devices, and a two-dimensional display device other than the two-dimensional display device arranged at a depth position farthest from an observer among the plurality of two-dimensional display devices. In combination with the apparatus, the apparatus is characterized by comprising a combination of a partial reflecting mirror and a lens for arranging the display of each two-dimensional display device as an image on the line of sight of the observer. Further, in the present invention, the second means is combined with a plurality of two-dimensional display devices and a two-dimensional display device which is arranged at a depth position farthest from an observer among the plurality of two-dimensional display devices, Combining a two-dimensional display device other than the two-dimensional display device arranged at the depth position farthest from the observer with a total reflection mirror or a partial reflection mirror that arranges the display of the two-dimensional display device as an image on the line of sight of the observer And
The two-dimensional display device is characterized in that the two-dimensional display device comprises a partial reflecting mirror that arranges the display as an image on the line of sight of the observer. Further, in the present invention, the second means is combined with a plurality of two-dimensional display devices and a two-dimensional display device which is arranged at a depth position farthest from an observer among the plurality of two-dimensional display devices, A combination of a total reflection mirror and a lens, or a combination of a partial reflection mirror and a lens, which arranges the display of the two-dimensional display device as an image on the line of sight of the observer; In combination with a two-dimensional display device other than the two-dimensional display device, the display device is characterized by comprising a combination of a partial reflecting mirror and a lens, each of which arranges the display of each two-dimensional display device as an image on the line of sight of the observer. . Also, in the present invention, the second means may include a plurality of scattering plates arranged at different depth positions as viewed from an observer and capable of controlling switching between a transmission state and a scattering state, or switching between a reflection state and a transmission state. Multiple controllable reflectors,
A plurality of projection type two-dimensional display devices that project a two-dimensional image on each of the plurality of scattering plates or a plurality of reflection plates, and the plurality of projection type two-dimensional display devices with the plurality of scattering plates or a plurality of reflection plates. A plurality of shutters arranged between the plurality of scattering plates for switching between the transmission state and the scattering state of the plurality of scattering plates, or for switching between the transmission state and the blocking state in synchronization with the switching between the reflection state and the transmission state of the plurality of reflection plates. Characterized by the following.
Further, the present invention is characterized in that a lens optical system is provided between the observer and a plurality of display surfaces at different depth positions as viewed from the observer. Further, the invention is characterized in that the second means comprises a two-dimensional display device, an optical system, and a varifocal mirror. Further, the present invention is characterized in that the second means comprises a vibrating screen vibrating in a depth direction, an optical system including a lens, a scanning means for raster-scanning a laser beam, and a laser light source. I do. Also, the present invention provides an LED display device comprising an LED array, a translation / rotation device for translating / rotating the LED display device, and an image supply device for supplying a video signal to the LED display device. Characterized by the following. Further, the invention is characterized in that the second means comprises a film or a two-dimensional display device on which a two-dimensional image is recorded, a conversion optical system having a prism or a mirror, and a projection drum. . Also, in the present invention, the second means may be arranged so that the first means
The two-dimensional image generated by the means is displayed on the plurality of display surfaces so as to overlap when viewed from one point on a line connecting the right eye and the left eye of the observer. Also, in the present invention, the second means may apply a deformation of enlargement / reduction in the left-right direction as viewed from an observer to the two-dimensional image generated by the first means, It is characterized by displaying. Further, the invention is characterized in that the second means sequentially switches and displays the two-dimensional images generated by the first means to generate a three-dimensional moving image. Also, the present invention
The third means, when the two-dimensional image generated by the first means includes a plurality of object images moving in the depth direction, when the moving direction of the object is a direction approaching the observer In synchronism with the switching of the two-dimensional image by the second means, the luminance of the object image displayed on the display surface closer to the observer among the plurality of display surfaces is sequentially increased, and the display farther from the observer is performed. The brightness of the object image displayed on the surface is sequentially reduced, and, when the moving direction of the object is a direction away from the observer, in synchronization with the switching of the two-dimensional image in the second means, The brightness of the object image displayed on the display surface closer to the observer among the plurality of display surfaces is sequentially reduced, and the brightness of the object image displayed on the display surface far from the observer is sequentially increased.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. In all the drawings for describing the embodiments, components having the same functions are denoted by the same reference numerals, and repeated description thereof will be omitted. In this embodiment, the expression “surface” on which an image is arranged is used, but this is the same expression as an image surface often used in optics and the like, and as a means for realizing such an image surface. Is
For example, various optical elements such as a lens, a total reflection mirror, a partial reflection mirror, a curved mirror, a prism, a polarizing element, and a wave plate, and, for example, a CRT (cathode ray tube) display, a liquid crystal display, an LED (Light Emission Diode) display, Plasma display, FED (Field Emission)
Display), DMD (Digital Mirror Display),
It is clear that the present invention can be realized by many optical combination techniques using a two-dimensional display device such as a projection display or a line drawing display. In addition, a case will be described in which a presented three-dimensional stereoscopic image is mainly displayed as a two-dimensional image on two surfaces. However, it is apparent that the same effect can be expected by using two or more surfaces.

[First Embodiment] FIGS. 1 to 8 are diagrams for explaining the principle of a three-dimensional display device according to a first embodiment of the present invention. The principle of the three-dimensional display device of the present embodiment is as follows.
First, as shown in FIG. 1, a plurality of surfaces, for example, surfaces (101, 102) (the surface 101 is
2 is closer to the observer 100), and these planes (1
01, 102), an optical system 103 is constructed using a two-dimensional display device and various optical elements (details will be described later). As the two-dimensional display device, for example, a CRT, a liquid crystal display, an LED display, a plasma display, an FED display, a projection type display, a line drawing type display, and the like, and as the optical element, for example, a lens, a total reflection mirror, A reflecting mirror, a curved mirror, a prism, a polarizing element, a wave plate, or the like is used. Next, as shown in FIG. 2, the three-dimensional object 104 to be presented to the observer 100 is
00 from the line-of-sight direction of both eyes,
2) Generated 2D images (105, 106), which are images projected to 2) (hereinafter referred to as "2D images"). As a method of generating this 2D image, for example,
There are various methods, such as a method using a two-dimensional image photographed by a camera, a method of synthesizing a plurality of two-dimensional images photographed from different directions, and a method using a compositing technique or modeling by computer graphics. As shown in FIG. 1, the 2D images (105, 106) are displayed on both surfaces 101 and 102 so as to overlap with each other when viewed from a point on a line connecting the right eye and the left eye of the observer 100. I do.
This can be achieved, for example, by controlling the arrangement of the center position and the center of gravity of each of the 2D images (105, 106) and the enlargement / reduction of each image.

An important point of the present invention is that the luminance of each of the 2D images (105, 106) is maintained on the apparatus having the above-described configuration while maintaining the overall luminance as viewed from the observer 100 constant. That is, it is changed according to the depth position of the original object 104. An example of such a change is described below. Note that, since the drawing is a black and white drawing, the one having higher luminance is shown darker in the following drawings for simplicity (however, FIG. 8 is excluded). For example, the three-dimensional object 104 is
01, as shown in FIG.
The luminance of the D-image 105 is made equal to the luminance of the three-dimensional object 104, and the luminance of the 2D image 106 on the surface 102 is set to zero.
Next, for example, when the three-dimensional object 104 is slightly away from the observer 100 and slightly closer to the surface 102 than the surface 101, the brightness of the 2D image 105 is slightly reduced as shown in FIG. The brightness of the 2D image 106 is slightly increased.
Further, for example, when the three-dimensional object 104 is further away from the observer 100 and further closer to the surface 102 than the surface 101, as shown in FIG.
Further, the luminance of the 2D image 106 is further increased. Finally, for example, the three-dimensional object 104 is
When it is above, as shown in FIG. 6, the brightness of the 2D image 106 on this is made equal to the brightness of the three-dimensional object 104,
The luminance of the 2D image 105 on the surface 101 is assumed to be zero. By displaying in this manner, the observer (person) 100 may be displayed as if it were a 2D image (105, 106) due to physiological or psychological factors or an illusion. It is felt that the three-dimensional object 104 is located between the planes (101, 102). That is,
For example, when the 2D images (105, 106) of almost equal luminance are displayed on the planes (101, 102), the planes (101, 102)
It is felt that there is a three-dimensional object 104 near the middle of the depth position of 102).

In the above description, for example, the depth position of the entire three-dimensional object 104 is, for example, a plane (10
Although the method and apparatus for expressing using the two-dimensional image displayed in (1, 102) have been mainly described, the method according to the present embodiment may be applied to, for example, a method and apparatus for expressing the depth of a three-dimensional object itself. Obviously it can be used.
One example is described in the following embodiment. An important point in expressing the depth of the three-dimensional object itself is that a 2D image (10
5 and 106), while maintaining the overall luminance of the three-dimensional object 104 as viewed from the observer 100 constant.
Is changed corresponding to the depth position of each part. One embodiment of the changing method is as follows.
A case where a surface is used will be described below with reference to FIG.
FIG. 7A shows a plane close to the observer 100, for example, the plane 101.
FIG. 7B is an example of a 2D image displayed on a surface far from the observer 100, for example, a surface 102.
It is an example of a chemical image. For example, taking a cake as shown in FIG. 7 as an example of a three-dimensional object, the upper surface and the lower surface of the cake (three-dimensional object) are substantially flat, for example, except for the candle placed on top, and the side surfaces thereof. Is, for example, in a columnar shape, and the candles are arranged, for example, near the circumference of the upper surface. In the 2D image in this case, on the upper surface and the lower surface, the upper side is located at the back, and on the side, the center is located at the back as approaching the end, and the hidden upper middle is located at the back. Will be located. In this case, the luminance change on the upper surface and the lower surface is, on the surface near the observer 100, for example, on the surface 101, as shown in FIG. Are gradually changed in accordance with the depth position such that the luminance is high and the luminance of a distant part (for example, the upper part in the 2D image) is low. On the surface far from the observer, for example, the surface 102, as shown in FIG. 7B, a portion close to the observer (for example, below in the 2D image) has low luminance and a portion far from the observer (2D image). Then, for example, the upper part) is gradually changed corresponding to the depth position so that the luminance becomes higher. Next, the luminance change of the cylindrical portion also corresponds to the depth position, and a surface close to the observer 100, for example, the surface 101, as shown in FIG. The luminance is gradually changed so that the luminance is high in the vicinity of the center and high in the distant parts (for example, near the left and right ends). On the surface far from the observer 100, for example, the surface 102, as shown in FIG. 7B, a portion near the observer 100 (for example, near the center) has low luminance and a portion far from the observer 100 (for example, left and right). (In the vicinity of the end) is gradually changed so as to increase the luminance. By displaying in this manner, even if the displayed image is a two-dimensional image due to the physiological or psychological factors or illusion of the observer (person) 100, the observer 100 has almost the upper surface and the lower surface almost. It feels like a flat cylindrical cake. In addition,
In this embodiment, a cylindrical three-dimensional object whose upper surface and lower surface are substantially flat is taken as an example, but it is apparent that the same can be applied to a three-dimensional object of another shape.

In this embodiment, a case has been described in which the luminance of a 2D image displayed on a plurality of surfaces is changed while the overall luminance viewed from the observer 100 is kept constant. However, emphasizing the three-dimensional effect by gradually decreasing the overall brightness as viewed from the observer 100 as it goes deeper is a technique often used in computer graphics, and is also used in the present invention. It is clear that the effect can be further promoted by performing the method, and one embodiment thereof is shown in FIG.
(B). In FIG. 8A, by gradually lowering the brightness of the lower floor portion upward, it is felt as if the upper floor is deeper in the depth direction. Further, in FIG. 8B, as in FIG. 8A, not only the floor portion but also the chain (the object on the ring) portion gradually decreases the luminance in the left direction, so that the chain of the left portion is reduced. Can be obtained as if the object is located at the back in the depth direction. In addition, as a method of calculating the degree of such a luminance decrease, for example, B ′ = B × T0 / T (T: from the viewpoint) Obviously, there are many methods, such as by using a formula for calculating the distance (T0: distance from the viewpoint to the reference plane). In addition, the two-dimensional image surface in the present embodiment is not necessarily required to be a plane from the viewpoint of the present invention, and may be a spherical surface, an elliptical surface, a quadratic surface, or another complicated curved surface. It is clear that the effect is obtained.

Also, in the present embodiment, unlike the conventional method shown in FIG. 27, there are at least two or more surfaces for actually displaying an image with the illusion position interposed therebetween. It is considered that the contradiction between binocular parallax, convergence, and focus adjustment can be largely suppressed, and eye fatigue can be suppressed.

In addition, since the observer 100 views two or more surfaces at the same time in the focus adjustment itself, the two-dimensional
Since the localized image is localized at a position where it can be viewed without blurring, the disadvantages of the conventional method can be greatly improved. In this case, a plurality of 2D images (for example, 105, 10 in FIG. 1)
6) (for example, 101, 10 in FIG. 1)
The depth distance in (2) is a range in which the image is less blurred when focusing on the depth position of the display target object as viewed from the observer 100 than when focusing on the plurality of surfaces. Also, unlike the conventional method shown in FIG. 28, an object present at an intermediate position on the image plane looks three-dimensional to an observer, and thus has an advantage that is not a conventional three-dimensional effect of writing. Further, in the present embodiment, since an object between a plurality of surfaces can be expressed, there is an advantage that the amount of data when performing three-dimensional display can be greatly reduced. Further, in the present embodiment, since a physiological or psychological factor or an illusion of a person due to only a change in the brightness of an image is used, a coherent light source such as a laser is not particularly required as a light source, and colorization is not required. It has the advantage of being easy. Further, the present invention does not include a mechanical drive unit, and thus has an advantage that it is suitable for weight reduction, improvement of reliability, and the like. Further, in the present embodiment, only two planes are mainly described among the planes on which the two-dimensional image is arranged, and the case where the object presented to the observer is between the two planes is described. Obviously, a similar configuration is possible even if the number of surfaces on which the two-dimensional image is arranged is larger than this, or the position of the object to be presented is different.

The three-dimensional stereoscopic image of the present invention is obtained by viewing the observer 100 from a point on a line connecting the right eye and the left eye of the observer 100.
2D image 105 of front surface 101 so as to overlap under visual acuity
And the size of the 2D image 106 of the rear surface 102 is controlled (to be precise, when viewed from one point on a line connecting the right eye and the left eye of the observer 100, It is an essential condition that the vertical direction overlaps.) Hereinafter, a 2D image (105, 10) according to the present embodiment will be described with reference to FIG.
The overlapping position 6) will be described. In the present embodiment, the best overlapping position among the overlapping positions of the two-dimensional images (105, 106) is, as shown in FIG.
This is an intermediate position between the right eye and the left eye. This is because the double image of the edge portion when viewed from both eyes is small. It is between the eyes that the three-dimensional stereoscopic image of the present invention is favorably observed,
The position as shown in FIG. 9B is the limit. However, within the range of the visual acuity of the observer 100, the three-dimensional stereoscopic image of the present invention may be observed even if the user deviates from both eyes to about FIG. When the position deviates further from this position, the three-dimensional stereoscopic image of the present invention is not generally observed, but is observed as two front and rear two-dimensional images. As described above, when the 2D image (105, 106) is displayed so as to overlap when viewed from a point on a line connecting the right eye and the left eye of the observer 100, particularly, the right eye and the left eye of the observer 100 are displayed. When one point between the right eye and the left eye is used as one point on the line connecting the two, the reliability of obtaining the effect of three-dimensional perception at the intermediate position between the plurality of planes (101, 102) increases. (In short, it works for many people, or in many cases.) Further, when the center position of the left and right eyes of the observer 100 is used as one point on the line connecting the right eye and the left eye of the observer 100, the effect is more easily obtained, and for example, the plane ( 101,
102) has the advantage that the size of the double image generated can be reduced. In addition, the 2D image (1
05, 106) is effective when the perceived depth, inclination, etc. are artificially changed.

In the above description, a plurality of 2D images (1
05, 106), the brightness of the plurality of 2D images (105, 106) is changed as described above, and the overall color viewed from the observer 100 is changed. The same effect can be obtained as the effect of the present invention even if each color is changed within a range not to be performed. In the present invention, the apparent depth position is changed by the luminance ratio of the front and rear two-dimensional images (105, 106). Therefore, as shown in FIG. 10, the color of the three-dimensional stereoscopic image 107 that the observer 100 wants to present when the observer 100 superimposes them (see FIG. 10).
Now, for example, yellow)
(In FIG. 10, for example, red)
Then, the color (for example, green in FIG. 10) of the two-dimensional image 106 on the rear surface 102 can be changed. In this case, for example, the color of the outline part is different from that of the middle part, which causes a feeling of strangeness in a normal case. However, for example, an effect may be obtained in terms of color matching with the background. As shown in FIG. 11A, the three-dimensional stereoscopic image of the present invention appears when a right-eye image and a left-eye image have portions where two-dimensional images before and after overlap each other. Therefore, the distance between the front and rear surfaces is greatly different, and for example, as shown in FIG. 11B, in the right-eye image and the left-eye image, the front and rear two-dimensional images (105, 10
When 6) does not overlap and separate, the three-dimensional stereoscopic image of the present invention does not appear, and the observer 100 feels as two front and rear two-dimensional images. Therefore, in the present embodiment, in order to express a three-dimensional stereoscopic image, a two-dimensional image (1
05, 106), a plurality of 2D images (105, 106) displayed on the surfaces of the same display target object are displayed by the observer 100. Is a range having a common area when viewed with a single eye from the positions of the right eye and the left eye. That is, in a state where the plane is not a common area, this effect (the effect of expressing a three-dimensional stereoscopic image) disappears, and the observer 100 feels that the surface is separated in the depth direction.
In this embodiment, it is needless to say that a three-dimensional moving image can be displayed by sequentially switching the two-dimensional images.

Second Embodiment FIGS. 12 to 17 are diagrams for explaining the principle of a three-dimensional display device according to a second embodiment of the present invention. First, as shown in FIG. 12, the three-dimensional display device according to the present embodiment includes a plurality of surfaces, for example, surfaces (111, 112) (surface 111 is surface 11) as shown in FIG.
In order to display a plurality of two-dimensional images on these surfaces, an optical system 113 is constructed using, for example, a two-dimensional display device and various optical elements.
As the two-dimensional display device, for example, a CRT, a liquid crystal display, an LED display, a plasma display, an FED display, a projection display, a line drawing display, and the like, and as the optical element, for example, a lens, a total reflection mirror, Partially reflecting mirrors, curved mirrors, prisms, polarizing elements, wave plates, and the like can be used. Next, as shown in FIG. 13, an image (2D image) (115) obtained by projecting the three-dimensional object 114 to be presented to the observer 100 from the viewing directions of both eyes of the observer 100 to the plane (111, 112) , 116). This 2D image (1
15, 116) are, as described above, for example, a method using a two-dimensional image obtained by photographing the three-dimensional object 114 from the line of sight, a method of synthesizing a plurality of two-dimensional images taken from another direction, or a computer. It can be generated by various methods such as a method using graphic synthesis technology or modeling. As shown in FIG.
The virtual images (115, 116) are displayed on both the plane 111 and the plane 112 so as to overlap when viewed from one point on a line connecting the right eye and the left eye of the observer 100. As described above, this can be achieved, for example, by controlling the arrangement of the center position and the center of gravity of each of the 2D images (115, 116) and the enlargement / reduction of each image.

An important point in the present embodiment is that the brightness of each of the images (115, 116) is kept constant while maintaining the overall brightness as viewed from the observer 100, and the time of the depth position of the three-dimensional stereoscopic image. That is, it is changed in response to a target change. As an example, a case in which, for example, a three-dimensional stereoscopic image temporally moves from the surface 111 to the surface 112 will be described below. As shown in FIG. 14, for example, when a three-dimensional stereoscopic image is on the surface 111, the 2D image 1
15 is equal to the luminance of the three-dimensional stereoscopic image,
The brightness of the upper 2D image 116 is set to zero.

Next, as shown in FIG. 15, for example, when the three-dimensional stereoscopic image gradually moves away from the observer 100 a little in time and slightly comes closer to the surface 112 from the surface 111, The luminance of the 2D image 115 is slightly reduced temporally in accordance with the movement of the depth position of the three-dimensional stereoscopic image, and
The luminance of the D image 116 is slightly increased with time. Next, FIG.
For example, as shown in FIG.
When moving further away in time and temporally moving to a position closer to the surface 112 than the surface 111, the 2D image 11 is moved in accordance with the movement of the depth position of the three-dimensional stereoscopic image.
5 is further reduced temporally, and the luminance of the 2D image 116 is further increased temporally. Further, as shown in FIG. 17, for example, when the three-dimensional stereoscopic image finally moves temporally to the surface 112, the 3D stereoscopic image is converted into a 2D image corresponding to the movement of the depth position of the three-dimensional stereoscopic image. Temporally changing the brightness of the image 116 until it is equal to the brightness of the three-dimensional stereo image;
Further, the luminance is changed until the luminance of the 2D image 115 on the surface 111 becomes zero.

By displaying in this way, even if the displayed image is a 2D image (115, 116) due to a physiological or psychological factor or an illusion of a person, the observer 100 feels like a plane (115, 116). 111, 112), face 1
It is felt that the three-dimensional stereoscopic image moves from 11 to the surface 112 in the depth direction. In the present embodiment,
Although the case where the three-dimensional stereoscopic image moves from the surface 111 to the surface 112 has been described, the case where the three-dimensional stereoscopic image moves from a depth position halfway between the surfaces (111, 112) to the surface 112, or from the surface 111 to the surface (111, 112). ), Or from a depth position halfway between the surfaces (111, 112) to another depth position halfway between the surfaces (111, 112). It is clear that the same is possible. In this embodiment, only two planes are mainly described among the planes on which the two-dimensional image is arranged, and the three-dimensional stereoscopic image presented to the observer 100 moves between the two planes. Although the case has been described, even when the number of surfaces on which the two-dimensional image is arranged is larger than this, or when the presented three-dimensional object moves across a plurality of surfaces, the same configuration is possible and the same It is clear that a significant effect can be expected. Further, in the present embodiment, a case has been described where one three-dimensional stereoscopic image moves in two planes on which a two-dimensional image is arranged. If the two-dimensional image includes a plurality of object images having different moving directions, the brightness of the object image displayed on each display surface is changed for each object image according to the moving direction and the moving speed of the object. Obviously, you need to change it.

[Third Embodiment] FIG. 18 is a diagram for illustrating a schematic configuration of a three-dimensional display device according to a third embodiment of the present invention. The three-dimensional display device of the present embodiment is shown in FIG.
As shown in (a), first, a plurality of two-dimensional display devices (1
21, 122) and a total reflection mirror 123 (for example, the reflectance /
An optical element for arranging a plurality of binary images described in the first and second embodiments using the partial reflection mirror 124 (e.g., reflectivity / transmittance = 50/50) using the transmittance = 100/0). It constitutes the system. By changing each arrangement,
An image plane 125 formed by the display of the two-dimensional display device 121 reflected by the total reflection mirror 123 and transmitted through the partial reflection mirror 124, and an image plane 126 formed by reflecting the display of the two-dimensional display device 122 by the partial reflection mirror 124 Can be arranged at different positions in the depth direction. Such an optical system has an advantage that image quality is less deteriorated because only a mirror is used. As the two-dimensional display device (121, 122), for example, CR
T, a liquid crystal display, an LED display, a plasma display, an FED display, a DMD display, a projection display, a line drawing display, and the like are used. However, even if the total reflection mirror 123 in the present embodiment is replaced with a partial reflection mirror, the two-dimensional display 1
Although the brightness of the image No. 21 is reduced, it is clear that the effect of the present invention can be similarly obtained. In the present embodiment, the case where the order of the depth position of the image plane is the same as the order of the depth position of the two-dimensional display device is described, but the distance from the total reflection mirror or the partial reflection mirror to the two-dimensional display device is changed. It is apparent that the order of the depth positions of the image plane can be freely changed.

As shown in FIG. 18B, the secondary display device 121 is directly disposed without using the total reflection mirror 123, and the partial reflection mirror 124 (for example, reflectance / transmittance = 50).
/ 50), an optical system for arranging a plurality of binary images described in the first and second embodiments can be formed. That is, the display of the two-dimensional display device 121 is the partial reflection mirror 1.
Image plane 125 formed by passing through the two-dimensional display device 1
Image plane 1 formed by reflecting the display 22 with the partial reflecting mirror 124
26 can be arranged at different positions in the depth direction. In the present embodiment, the case where the order of the depth positions of the image plane is the same as the order of the depth positions of the two-dimensional display device is described, but by changing the distance from the partial reflecting mirror to the two-dimensional display device, Obviously, the order of the surface depth positions can be freely changed.

FIG. 19 shows an embodiment in which the position of the image plane can be changed more flexibly by including a lens or the like in the optical system. As shown in FIG. 19A, a plurality of two-dimensional display devices (131, 132) and, for example, a total reflection mirror 133 (for example, reflectance / transmittance = 100/0),
Partially reflecting mirror 134 (for example, reflectance / transmittance = 50/5
For example, by adding a convex lens (137, 138) to the configuration of (0) to change the image position, the positional relationship between the image plane 135 and the image plane 136, which has been limited due to restrictions on the size of the apparatus, can be more flexibly. You can see that it can be set. However, even if the total reflection mirror 133 in the present embodiment is replaced with a partial reflection mirror, the brightness of the image of the two-dimensional display device 131 is reduced, but it is clear that the effect of the present invention can be similarly obtained. In the present embodiment, the case where the order of the depth positions of the image plane is the same as the order of the depth positions of the two-dimensional display device has been described, but the distance from the total reflection mirror or the partial reflection mirror to the two-dimensional display device can be changed. Obviously, the order of the depth positions of the image plane can be freely changed by disposing the optical system such as a lens. Further, as shown in FIG. 19B, the two-dimensional display device 131 is directly disposed without using the total reflection mirror 133, and the configuration of the partial reflection mirror 134 (for example, reflectance / transmittance = 50/50) is provided. For example, for example, a convex lens (137,
138) to change the image position, the image plane 135 and the image plane 1 limited by the size of the apparatus are limited.
36 can be set more flexibly. Of course, the use of a lens optical system such as a combination lens as well as a convex lens may be advantageous in terms of distortion and the like, as in the case of a normal lens optical system. Also, in this case, a case where a virtual image in which the two-dimensional display device is installed at a position closer to the focal length of the lens is used as an example, but a real image in which the two-dimensional display device is installed at a position farther than the focal length of the lens is shown. It is clear that the same can be done when used. In the present embodiment, the case where the order of the depth positions of the image plane is the same as the order of the depth positions of the two-dimensional display device is described. It is clear that the order of the depth positions of the image plane can be freely changed depending on the arrangement of the system.

FIG. 20 shows an embodiment in which two-dimensional display devices are further increased. For example, a plurality of two-dimensional display devices (141 to 145), a total reflection mirror 146 (for example, reflectance / transmittance = 100/0), and a partial reflection mirror 147 (for example, reflectance / transmittance = 50/50) 148 (for example,
Reflectance / transmittance = 33.3 / 66.7), 149 (for example, reflectance / transmittance = 25/75), 150 (for example,
This is an example in which an optical system for arranging a plurality of binary images is configured using (reflectance / transmittance = 20/80). By changing each arrangement, the display of the two-dimensional display device 141 is reflected by the total reflection mirror 146 and the partial reflection mirrors (147 to 15).
0) and the display of the two-dimensional display device (142 to 145) are partially reflected mirrors (147 to 147).
The image planes (152 to 155) that are reflected at 150) and transmitted through the partial reflecting mirror can be arranged at different positions in the depth direction. Such an optical system has an advantage that image quality is less deteriorated because only a mirror is used. In addition,
In the above-described embodiment, the case where the number of the two-dimensional display devices is five has been described, but it is apparent that a similar configuration is possible with other numbers. In this case as well, it is apparent that the addition of the lens optical system as shown in FIG. 19 with respect to FIG. 18 makes it easier to control the position of the image plane. However, even if the total reflection mirror 143 in the present embodiment is replaced with a partial reflection mirror, the brightness of the image of the two-dimensional display device 141 is reduced, but it is clear that the effects of the present invention can be similarly obtained. In the present embodiment, the case where the order of the depth position of the image plane is the same as the order of the depth position of the two-dimensional display device is described, but the distance from the total reflection mirror or the partial reflection mirror to the two-dimensional display device is changed. It is apparent that the order of the depth positions of the image plane can be freely changed.

FIG. 21 shows a plurality of projector type two-dimensional display devices (for example, CRT type, LCD type, ILV type, DMD type).
Molds) (161 to 165) and scattering plates (166 to 17)
An embodiment in which an optical system for arranging a plurality of binary images by projecting an image from a projector onto a scattering plate using (0) will be described. Here, the scattering plate (166)
To 170) can control scattering / transmission or reflection / transmission like a polymer dispersed liquid crystal element, a holographic polymer dispersed liquid crystal element, or a combination element of a liquid crystal and a multi-lens array. The shutters (171 to 175) can control transmission / blocking like a twisted nematic liquid crystal element, a ferroelectric liquid crystal element, or a mechanical shutter element, for example. The depth positions of the scattering plates (166 to 170) are changed, and the images are projected by aligning the focus planes of the projector type two-dimensional display devices (161 to 165) with these scattering plates (166 to 170). And a scattering plate (166-1)
70) scattering / transmission timing and shutter (171 to 171)
The depth position of the image planes (171 to 175) formed on the scattering plates (166 to 170) can be controlled in a time division manner by driving the transmission / blocking timing of 175) in synchronization. Thus, when using a projector,
This has the advantage that the degree of freedom in the layout of the device is great. In this embodiment, the case where the number of the two-dimensional display devices is five has been described, but it is apparent that a similar configuration can be performed with other two-dimensional display devices. Also, instead of the shutter,
Obviously, the lamp of the projector may be turned on / off. Further, in the present embodiment, the case where there is an image plane near, inside, or behind the three-dimensional display device has been mainly described, but by adding an optical device to these image surfaces, the three-dimensional display device It is easily possible to arrange them further apart or on the front side. One embodiment is shown in FIG. For example, a lens optical system 183, for example, on a front surface of an optical system 181 as shown in FIG.
It is clear that the position of the image plane can convert the position of the internal image plane 182 to the position of the external image plane 184, for example. In such a case, since the image is reproduced floating in space, it has an advantage that the observer can feel three-dimensionally more easily than when the image is inside or behind the apparatus.

[Embodiment 4] Embodiment 4 of the present invention
Is an embodiment in which the optical system for arranging a plurality of binary images in the first and second embodiments is configured using a volume type three-dimensional display device. For example, as described in “Three-dimensional display” (Chihiro Masuda, Sangyo Tosho Co., Ltd.), a volume type three-dimensional display device is a two-dimensional image sampled in the depth direction (2D image in the first embodiment). This is a method in which three-dimensional display is performed by stacking the same images. The volume type three-dimensional display device includes, for example, a varifocal mirror method and a vibrating screen method. The varifocal mirror type volumetric 3D display device
As shown in FIG. 23, an image displayed on a two-dimensional display device 204 such as a TV (television) is displayed on a half mirror 20.
Observer 10 through 1 and varifocal mirror 202
0 is a configuration for observing a three-dimensional stereoscopic image (virtual image) 203. The varifocal mirror 202 which is a key device in this method is, for example, a device in which a metal such as aluminum or a dielectric multilayer film is applied to the surface of a woofer (a speaker for generating low-frequency sound) to form a concave mirror. When it is vibrated like a woofer, the curvature of the concave mirror portion changes and its focal length can be changed. Therefore, for example, the position of a virtual image or a real image of the two-dimensional display device 204 can be changed according to the change in the focal length. Therefore, by synchronizing with the change in the focal length of the varifocal mirror 202, a two-dimensional display device 204 displays a depth sampled image (a two-dimensional image obtained by cutting a three-dimensional object into slices in the depth direction). A three-dimensional stereoscopic image can be displayed in a time-sharing manner (using the afterimage effect). In the present invention, using this method and apparatus,
By repeating the short-time display of the two-dimensional display device a plurality of times within the afterimage time, a plurality of two-dimensional image planes can be provided. Further, the depth position of the image plane can be designated by the vibration position of the varifocal mirror 202. Therefore, the effects of the present invention can be obtained by changing the luminance of the 2D image described in the first and second embodiments on these image planes and displaying them. This method has an advantage that the number of movable parts is small and also has an advantage that a plurality of image surfaces can be easily formed.

As shown in FIG. 24, the vibrating screen type volume type three-dimensional display device includes a vibrating screen (for example, a diffusing plate, a lenticular plate, a rope-like lens plate, etc.) 301 vibrating in the depth direction, and a lens. Optical system 302 including
A scanning device (consisting of a horizontal / vertical scanning device, for example, an optical deflection device using a polygon mirror, a galvano mirror, or the like) 303 for performing raster scanning (horizontal / vertical scanning) of laser light, a laser light source 304, etc. Be composed. In this method, when the vibrating screen 301 is at a desired depth position, the scanning device 303 is driven at high speed to write a sampled image at the depth position, and the depth position is changed and repeated within an afterimage time. A three-dimensional stereoscopic image can be reproduced. In the present invention, a plurality of two-dimensional image planes can be provided by repeating the high-speed writing of the sampled image on the vibrating screen 301 a plurality of times within the afterimage time by using this method and apparatus. The depth position of the image plane can be designated by the position of the vibrating screen 301. Therefore, the effects of the present invention can be obtained by changing the luminance of the 2D image described in the first and second embodiments on these image planes and displaying them. This method has an advantage that distortion on a screen surface can be easily suppressed and an advantage that a plurality of image surfaces can be easily formed.

[Embodiment 5] Embodiment 5 of the present invention
Is a rotating LED type three-dimensional display device, and as shown in FIG.
1, a rotation device 402 for rotating the LED display device 401, a video supply device 403 for supplying a video signal to the LED display device 401, and the like. in this way,
It is necessary to sample a three-dimensional object in polar coordinates about the rotation axis of the LED display device 401. Displaying a two-dimensional image sampled in polar coordinates on the LED display device 401 in synchronization with the rotation of the LED display device 401 using such a sampled image in polar coordinates is repeated by changing the rotation angle. Can reproduce a three-dimensional stereoscopic image. In the present invention, using this method and apparatus, a desired two-dimensional image plane is converted into the above-mentioned polar coordinates, and the high-speed display on the LED of the converted position coordinates within the afterimage time is performed while changing the rotation angle. By repeating, a plurality of two-dimensional image planes can be provided. Then, the 2D described in the first and second embodiments is applied to these image planes.
The effect of the present invention can be obtained by changing the luminance of the image and displaying the image. In this method, the advantage that it is easy to suppress the distortion on the screen surface and the like,
There are advantages that the display device 401 can be relatively easily rotated and that a plurality of image planes can be easily formed.

[Embodiment 6] Embodiment 6 of the present invention
Is a three-dimensional display device of the synthesizer type, and FIG.
As shown in FIG. 1, a film or a two-dimensional display device (for example, a CRT or a liquid crystal display) 501 on which a two-dimensional image is recorded, and a conversion optical system 50 such as a prism or a mirror.
2 and a projection drum 503. 504 is a light source,
Reference numeral 505 denotes a shutter. The projection drum 503, which is a key device in this method, is made of a transparent material having a changed thickness (for example, glass or a transparent plastic such as acrylic), and forms an image on the film or the display of the two-dimensional display device 501 through the projection drum. Let it. This method utilizes that the thickness changes when the projection drum 503 is rotated, thereby changing the position of the image plane. Therefore, by synchronizing with the change of the image plane position, a depth sampled image (a two-dimensional image obtained by cutting a three-dimensional object into slices in the depth direction and sampled) is displayed on the two-dimensional display device 501 in a time-division manner. A three-dimensional stereoscopic image can be displayed (using the afterimage effect). In the present invention, a plurality of two-dimensional image planes can be provided by repeating the short-time display of the film or the two-dimensional display device a plurality of times within the afterimage time by using this method and apparatus. Further, the depth position of the image plane can be designated by the thickness of the projection drum. Therefore, the effects of the present invention can be obtained by changing the luminance of the 2D image described in the first and second embodiments on these image planes and displaying them. This method has the advantage of having few moving parts,
There is also an advantage that a plurality of image surfaces can be easily formed. As described above, the invention made by the inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and can be variously modified without departing from the gist of the invention. Of course, it is.

[0028]

The effects obtained by typical ones of the inventions disclosed in the present application will be briefly described as follows. According to the present invention, a plurality of two-dimensional images sampled by cutting a three-dimensional object in the depth direction are displayed on surfaces 1 to N (N ≧ 2) having different depth positions from the observer. Since the brightness of each two-dimensional image on each plane is changed independently, it is possible to suppress inconsistencies between physiological factors of stereoscopic vision, reduce the amount of information, and electrically rewritable three-dimensional moving images Can be reproduced.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle of a three-dimensional display device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the principle of the three-dimensional display device according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining the principle of the three-dimensional display device according to the first embodiment of the present invention.

FIG. 4 is a diagram for explaining the principle of the three-dimensional display device according to the first embodiment of the present invention.

FIG. 5 is a diagram for explaining the principle of the three-dimensional display device according to the first embodiment of the present invention.

FIG. 6 is a diagram for explaining the principle of the three-dimensional display device according to the first embodiment of the present invention.

FIG. 7 is a diagram for explaining the principle of the three-dimensional display device according to the first embodiment of the present invention.

FIG. 8 is an image displayed on a display for explaining the principle of the three-dimensional display device according to the first embodiment of the present invention.

FIG. 9 is a diagram for explaining an overlapping position of a 2D image displayed on each surface in the three-dimensional display device according to the first embodiment of the present invention.

FIG. 10 is a diagram for explaining color distribution of a 2D image displayed on each surface in the three-dimensional display device according to the first embodiment of the present invention.

FIG. 11 is a diagram for describing an inter-surface distance of each surface in the three-dimensional display device according to the first embodiment of the present invention.

FIG. 12 is a diagram for explaining the principle of the three-dimensional display device according to the second embodiment of the present invention.

FIG. 13 is a diagram for explaining the principle of the three-dimensional display device according to the second embodiment of the present invention.

FIG. 14 is a diagram for explaining the principle of the three-dimensional display device according to the second embodiment of the present invention.

FIG. 15 is a diagram for explaining the principle of the three-dimensional display device according to the second embodiment of the present invention.

FIG. 16 is a diagram for explaining the principle of the three-dimensional display device according to the second embodiment of the present invention.

FIG. 17 is a diagram for explaining the principle of the three-dimensional display device according to the second embodiment of the present invention.

FIG. 18 is a diagram illustrating a schematic configuration of a three-dimensional display device according to a third embodiment of the present invention.

FIG. 19 is a diagram showing an embodiment in which the position of an image plane can be changed more flexibly by including a lens or the like in the optical system according to the third embodiment of the present invention.

FIG. 20 is a diagram showing an embodiment in a case where the number of two-dimensional display devices according to the third embodiment of the present invention is increased.

FIG. 21 is a diagram illustrating an embodiment in which an optical system for projecting an image from a projector to a scattering plate is configured using a plurality of projector-type two-dimensional display devices and a scattering plate according to a third embodiment of the present invention. .

FIG. 22 is a diagram showing another embodiment in which the optical device according to the third embodiment of the present invention is added.

FIG. 23 is a diagram illustrating a schematic configuration of a varifocal mirror type volume three-dimensional display device according to a fourth embodiment of the present invention.

FIG. 24 is a diagram illustrating a schematic configuration of a vibrating screen type volume type three-dimensional display device according to a fourth embodiment of the present invention.

FIG. 25 is a diagram showing a schematic configuration of a rotating LED type three-dimensional display device according to a fifth embodiment of the present invention.

FIG. 26 is a diagram illustrating a schematic configuration of a three-dimensional display device of a synthesizer type according to a sixth embodiment of the present invention.

FIG. 27 is a diagram showing a schematic configuration of a conventional three-dimensional display device.

FIG. 28 is a diagram showing a schematic configuration of another conventional three-dimensional display device.

[Explanation of symbols]

100,607 ... observer, 101,102,111,1
12 ... plane, 103, 113, 181 ... optical system, 104,
114, 601, 611 ... three-dimensional object, 105, 10
6, 115, 116: 2D image, 107: three-dimensional solid image, 121, 122, 131, 132, 141 to 14
5,204: two-dimensional display device, 123, 133, 146
... total reflection mirror, 124, 134, 147 to 150 ... partial reflection mirror, 125, 126, 135, 135, 151 to 15
5 image plane, 137, 138 convex lens, 161 to 165
... Projector type two-dimensional display device, 166 to 170 ... scattering plate, 171 to 175, 505 ... shutter, 182 ... internal image plane, 183 ... lens optical system, 184 ... external image plane, 2
01: optical system including a half mirror, 202: varifocal mirror, 203: virtual image, 301: vibrating screen, 302: optical system including a lens, 303: scanning device, 304: laser light source, 401: LED display device, 4
02: rotating device, 403: video supply device, 501: film or two-dimensional display device on which a two-dimensional image is recorded, 50
2 ... conversion optical system, 503 ... projection drum, 504 ... light source,
602, 603: camera, 604: video signal converter,
605: CRT display device, 606: liquid crystal shutter glasses,
612: collection of two-dimensional images, 613: volume type three-dimensional display device, 614: three-dimensional redevelopment.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 13/04 H04N 13/04

Claims (26)

[Claims] 1. A three-dimensional display method for generating a three-dimensional image by displaying a two-dimensional image on each of a plurality of display surfaces having different depth positions, wherein the plurality of display surfaces have different depth positions as viewed from an observer. For the display surface, to generate a two-dimensional image of the display target object projected from the direction of the line of sight of the observer, and independently change the brightness of the generated two-dimensional image for each of the display surfaces, A three-dimensional display method, wherein the generated two-dimensional image is displayed on a plurality of display surfaces. 2. The brightness of the two-dimensional image displayed on a display surface of the plurality of display surfaces that is closer to the observer when the display target object is an object that is displayed at a depth position closer to the observer. High, the brightness of the two-dimensional image displayed on a display surface far from the observer is low, and, when the display target object is an object displayed at a depth position far from the observer, the plurality of 2. The brightness of the two-dimensional image displayed on a display surface closer to the observer among the display surfaces is reduced, and the brightness of the two-dimensional image displayed on a display surface far from the observer is increased. 3. The three-dimensional display method according to 1. 3. The two-dimensional image is displayed on the plurality of display surfaces so that the two-dimensional image overlaps when viewed from one point on a line connecting the right eye and the left eye of the observer, and the two-dimensional image is viewed by the observer. The three-dimensional display method according to claim 1 or 2, wherein the overall luminance is made equal to the luminance of the original display target object. 4. Displaying the two-dimensional image on the plurality of display surfaces so that the two-dimensional image overlaps when viewed from a point on a line connecting the right eye and the left eye of the observer, and 2. The overall brightness viewed by the observer is lower when the depth position is far from the observer than when the depth position is close.
Or the three-dimensional display method according to claim 2. 5. The tertiary degree according to claim 3, wherein a point on a line connecting the right eye and the left eye of the observer is a point between the right eye and the left eye. Original display method. 6. The three-dimensional display according to claim 3, wherein one point on a line connecting the right eye and the left eye of the observer is a center point of the right eye and the left eye. Method. 7. A two-dimensional image displayed on the plurality of display surfaces is overlapped when viewed from a point on a line connecting the right eye and the left eye of the observer in a horizontal direction as viewed from the observer. The three-dimensional display method according to any one of claims 3 to 6, wherein an enlargement / reduction is added to the image. 8. A depth position between display surfaces for displaying the two-dimensional image, and a plurality of two-dimensional images displayed on the display surfaces of the same display target object are determined by a right eye and a left eye of an observer. The three-dimensional display method according to any one of claims 1 to 7, wherein a range having a common region as viewed from a single eye from the position (1) is set. 9. A plurality of two-dimensional images displayed on a display surface of the same display target object when a depth position between display surfaces displaying the two-dimensional image is displayed on the same display target object. 9. The method according to claim 1, wherein focusing on a depth position of the image is within a range in which image blur is less than focusing on the plurality of display surfaces. 3D display method. 10. The three-dimensional display method according to claim 1, wherein a three-dimensional moving image is generated by sequentially switching the two-dimensional images. 11. When the two-dimensional image includes a plurality of object images moving in a depth direction, and when the moving direction of the object is a direction approaching an observer, the two-dimensional image is synchronized with switching of the two-dimensional image. And sequentially increasing the brightness of the object image displayed on the display surface closer to the observer among the plurality of display surfaces,
The brightness of the object image displayed on the display surface far from the observer is sequentially reduced, and when the moving direction of the object is a direction moving away from the observer, the plurality of objects are synchronized with the switching of the two-dimensional image. The luminance of the object image displayed on the display surface closer to the observer among the display surfaces of the plurality of the display surfaces is sequentially reduced, and the luminance of the object image displayed on the display surface far from the observer is sequentially increased. 13. The three-dimensional display method according to 10. 12. A first means for generating a two-dimensional image obtained by projecting a display target object from a direction of a line of sight of an observer on a plurality of display surfaces at different depth positions as viewed from the observer; Second means for displaying the two-dimensional image generated by the first means on a plurality of display surfaces at different depth positions as viewed from an observer, and brightness of the two-dimensional image displayed on the plurality of display surfaces And a third means for changing each of the display surfaces independently for each display surface. 13. The two-dimensional display device, wherein: the plurality of two-dimensional display devices; and a two-dimensional display device other than the two-dimensional display device arranged at a depth position farthest from an observer among the plurality of two-dimensional display devices. 13. The three-dimensional display device according to claim 12, wherein the three-dimensional display device is combined with a partial reflecting mirror that arranges the display of each two-dimensional display device as an image on the line of sight of an observer. 14. The two-dimensional display device, comprising: a plurality of two-dimensional display devices; and a two-dimensional display device other than the two-dimensional display device disposed at a depth position farthest from an observer among the plurality of two-dimensional display devices. 13. The three-dimensional display according to claim 12, wherein the three-dimensional display is constituted by a combination of a partially reflecting mirror and a lens, each of which displays the display of each two-dimensional display device as an image on the line of sight of an observer. apparatus. 15. The second means is combined with a plurality of two-dimensional display devices, and a two-dimensional display device arranged at a depth position farthest from an observer among the plurality of two-dimensional display devices,
A two-dimensional display device other than a two-dimensional display device that is arranged at a depth position farthest from the observer, and a total reflection mirror or a partial reflection mirror that arranges the display of the two-dimensional display device as an image on the line of sight of the observer; 13. The three-dimensional display device according to claim 12, wherein the three-dimensional display device is combined with a partial reflecting mirror that arranges a display of each two-dimensional display device as an image on a line of sight of an observer. 16. The second means is combined with a plurality of two-dimensional display devices, and a two-dimensional display device arranged at a depth position farthest from an observer among the plurality of two-dimensional display devices,
A combination of a total reflection mirror and a lens, or a combination of a partial reflection mirror and a lens, which arranges the display of the two-dimensional display device as an image on the line of sight of the observer, and is arranged at a depth position furthest from the observer Combined with a two-dimensional display device other than the two-dimensional display device, the display of each two-dimensional display device is configured as a combination of a partial reflecting mirror and a lens arranged as an image on the line of sight of the observer. The three-dimensional display device according to claim 12, wherein 17. The second means comprises a plurality of scattering plates arranged at different depth positions as viewed from an observer and capable of switching control between a transmission state and a scattering state, or switching control between a reflection state and a transmission state. A plurality of reflectors capable of, a plurality of projection type two-dimensional display devices that project a two-dimensional image on each of the plurality of scattering plates or the plurality of reflectors, the plurality of scattering plates or the plurality of reflectors, and Arranged between a plurality of projection type two-dimensional display devices, switching between the transmission state and the scattering state of the plurality of scattering plates, or the transmission state in synchronization with the switching between the reflection state and the transmission state of the plurality of reflection plates. 13. The three-dimensional display device according to claim 12, comprising a plurality of shutters for switching a blocking state. 18. The lens optical system according to claim 12, wherein a lens optical system is provided between the plurality of display surfaces at different depth positions as viewed from the observer and the observer.
The three-dimensional display device according to any one of items 7 to 7. 19. The three-dimensional display device according to claim 12, wherein said second means comprises a two-dimensional display device, an optical system, and a varifocal mirror. 20. The second means comprises: a vibrating screen vibrating in a depth direction; an optical system including a lens; a scanning means for raster-scanning a laser beam; and a laser light source. Claim 1
3. The three-dimensional display device according to 2. 21. An LED display device comprising an LED array, a translation / rotation device for translating / rotating the LED display device, and a video supply device for supplying a video signal to the LED display device. The three-dimensional display device according to claim 12, wherein the three-dimensional display device is configured. 22. The second means, comprising: a film or a two-dimensional display device on which a two-dimensional image is recorded; a conversion optical system having a prism or a mirror; and a projection drum. Item 1
3. The three-dimensional display device according to 2. 23. The display device according to claim 23, wherein the second unit overlaps the two-dimensional image generated by the first unit when viewed from one point on a line connecting the right eye and the left eye of the observer. 23. The three-dimensional display device according to claim 12, wherein the display is performed on a surface. 24. The second means applies a deformation of enlargement / reduction in the left-right direction viewed from an observer to the two-dimensional image generated by the first means, and displays the two-dimensional image on the plurality of display surfaces. The three-dimensional display device according to claim 23, wherein: 25. The apparatus according to claim 12, wherein said second means generates a three-dimensional moving image by sequentially switching and displaying the two-dimensional images generated by said first means. Item 25. The three-dimensional display device according to item 24. 26. The third means, wherein the two-dimensional image generated by the first means includes a plurality of object images moving in a depth direction, and the moving direction of the object is determined by an observer. In the case of the direction approaching, in synchronization with the switching of the two-dimensional image in the second means, the brightness of the object image displayed on the display surface closer to the observer among the plurality of display surfaces is sequentially increased. Then, the luminance of the object image displayed on the display surface far from the observer is sequentially reduced, and when the moving direction of the object is a direction moving away from the observer, the two-dimensional image In synchronization with the switching, the luminance of the object image displayed on the display surface closer to the observer among the plurality of display surfaces is sequentially reduced, and the luminance of the object image displayed on the display surface far from the observer is sequentially increased. The three-dimensional display device according to claim 25, wherein: