JP2006091333A - Three-dimensional video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-dimensional video display device of high image quality capable of providing a high stereoscopic feeling with less feeling of incompatibility. <P>SOLUTION: The three-dimensional video display device A is provided with: a two-dimensional video display element 2; a lens array 3 in which unit lens elements corresponding to at least one pixel of the two-dimensional video element 2 and having a focus distance variable on the basis of the depth information of a video image displayed at the pixel are two-dimensionally arranged; and an eyepiece 6 for projecting the video image formed at the lens array 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a three-dimensional video display device.

Conventionally, when shooting a video, a left-eye video and a right-eye video are respectively captured, and each video is observed with the left and right eyes, and the parallax and the convergence angle of the left and right eyes are used. It is known to reproduce 3D images from 2D images. In addition, a variable focus lens corresponding to each pixel of the two-dimensional display image is arranged, and the focal length of the variable focus lens is changed based on the depth information of the image displayed on each pixel to give the formed image a depth. Alternatively, it has been proposed to reproduce a three-dimensional image from a two-dimensional image by providing a waveguide having an incident end on the light emitting surface of each pixel and adding depth to the image according to the length of the waveguide (for example, , Patent Document 1 and Patent Document 2).
Japanese National Patent Publication No. 11-513129 JP 2003-295116 A

  However, when reproducing 3D images from 2D images using binocular parallax or convergence angle, the distance feeling due to binocular parallax or convergence angle does not necessarily match the optical distance feeling of the image, and the difference between them may increase. When the observation time is prolonged, there is a problem that the eyes feel uncomfortable and cause eye fatigue, nausea and the like. In addition, the disclosed example of Patent Document 1 proposes a specific configuration for displaying a 3D image using a 2D image, although a basic idea of 3D image display using a variable focus lens has been proposed. However, it is not completed as a three-dimensional image display device that realizes a high stereoscopic effect. In addition, in the disclosed example of Patent Document 2, a plurality of waveguides having different lengths are arranged on the light emitting surface of each pixel to give depth depending on the length of the waveguide. It is necessary to arrange a number of different waveguides. For this reason, there is a problem that it is difficult to obtain a high-quality three-dimensional image because there is a limit to increasing the resolution in the depth direction of the image.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a three-dimensional video display device that has high image quality, low discomfort, and high stereoscopic effect.

  In order to achieve the above object, the present invention is capable of changing a focal length based on depth information of a two-dimensional image display element and at least one pixel of the two-dimensional image element and displayed on the pixel. A three-dimensional image display device comprising: a unit lens element having a lens array arranged two-dimensionally; and an eyepiece that projects the image formed by the lens array. To do.

  In the 3D image display device according to the present invention, it is preferable that the lens array is telecentric at least on the image side.

  In the 3D image display device according to the present invention, it is preferable that the lens array is a microlens array.

  In the three-dimensional image display device according to the present invention, the lens array is preferably a liquid crystal lens array.

  In the 3D image display apparatus according to the present invention, it is preferable that the focal position of the eyepiece lens is within a variable focal length range of the lens array.

  The three-dimensional image display device according to the present invention further includes a first intermediate imaging lens between the two-dimensional image display element and the lens array, and the first intermediate imaging lens includes the two-dimensional image. It is preferable that the image displayed on the display element is projected onto the lens array.

  In the 3D image display device according to the present invention, it is preferable that the first intermediate imaging lens has a magnification.

  The 3D image display device according to the present invention further includes a second intermediate imaging lens disposed between the lens array and the eyepiece, and the second intermediate imaging lens is the lens array. It is preferable to project the image displayed on the formed two-dimensional image display element onto the eyepiece.

  In the 3D image display apparatus according to the present invention, it is preferable that the second intermediate imaging lens has an enlargement magnification.

  In the 3D image display device according to the present invention, it is preferable that at least one of the first intermediate imaging lens, the second intermediate imaging lens, and the eyepiece includes a telecentric system.

  The three-dimensional image display device according to the present invention includes an illumination device and a polarization separation element provided on an emission side of an image displayed on the two-dimensional image display element, and the polarization separation element includes the illumination An image displayed on the two-dimensional image display element by reflecting a polarized light beam in a specific direction from the apparatus and entering the two-dimensional image display element and transmitting the light beam modulated and reflected by the two-dimensional image display element. A configuration for projecting onto the lens array is preferable.

  The 3D image display device according to the present invention preferably has at least one deflecting mirror and deflects and projects an optical path of an image displayed on the 2D image display element.

  In the three-dimensional image display device according to the present invention, one of the deflection mirrors is a combiner, and the image displayed on the two-dimensional image display element and the real image of the outside world are overlapped via the combiner. A configuration that enables observation is preferable.

  The 3D image display device according to the present invention includes a set of the 3D image display device for the left eye and the right eye, and the left eye image is displayed on the 2D display element for the left eye. And displaying a right-eye image on the two-dimensional display element for the right eye.

  According to the present invention, it is possible to provide a three-dimensional video display device that has high image quality, little discomfort, and high stereoscopic effect.

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

  FIG. 1 is a schematic configuration diagram of a binocular 3D image display apparatus according to a first embodiment of the present invention. FIG. 2 is a schematic diagram illustrating the operating principle of the 3D image display apparatus of FIG. FIG. 3 is a schematic configuration diagram of a first modification of the 3D image display apparatus shown in FIG. FIG. 4 is a schematic configuration diagram of a second modification of the 3D video display apparatus shown in FIG. FIG. 5 is a schematic configuration diagram of a 3D video display apparatus according to the second embodiment of the present invention. FIG. 6 is a schematic configuration diagram of a first modification of the 3D image display apparatus according to the second embodiment. FIG. 7: shows the schematic block diagram of the 2nd modification of the three-dimensional video display apparatus concerning 2nd Embodiment. FIG. 8 is a schematic configuration diagram of a third modification of the 3D image display apparatus according to the second embodiment. FIG. 9 is a schematic configuration diagram of a binocular 3D video display device configured with the 3D video display device according to the second embodiment of the present invention.

(First embodiment)
With reference to FIG. 1 and FIG. 2, the 3D image display apparatus according to the first embodiment of the present invention will be described.

  In FIG. 1, a binocular 3D image display apparatus A is composed of a pair of 3D image display apparatuses A (R) and A (L) for right eye and left eye. Since the right-eye 3D image display device A (R) and the left-eye 3D image display device A (L) have the same configuration, the right-eye 3D image display device A (R) will be representative. As detailed.

  As shown in FIG. 1, the 3D video display device A (R) has a 3D video playback device 1 for controlling video for display, and displays a video for the right eye based on video information sent from this. The 3D video display device 2 (R) and the 3D video playback device 1 corresponding to at least one of the pixels of the 2D video display device 2 (R) and corresponding to the video displayed on each pixel. A variable-focus microlens array 3 (R) in which single lens elements whose focal length can be changed based on the transmitted depth information (right-eye distance information) are two-dimensionally arranged, and the variable-focus microlens array 3 (R ) And an eyepiece 6 (R) that projects the image 4 (R) imaged at a different focal length on the right eye 5 (R).

  In FIG. 2, an image 4 (R) formed by changing the focal length in accordance with the depth information from the 3D image reproduction apparatus 1 by the variable focus microlens array 3 (R) is converted into the variable focus microlens array 3 (R). ) In the distance d1 between the focal length range a surface and b surface. The a-plane is at the farthest distance from the eyepiece 6 (R), and the b-plane is at the closest distance to the eyepiece 6 (R). On the other hand, the focal plane c of the eyepiece 6 (R) is configured to be located between the a-plane and the b-plane, and projects the enlarged image 4 'on the right eye 5 (R).

  If the eyepiece 6 (R) is configured such that the focal plane c is closer to the variable microlens array 3 (R) than the a-plane, an infinitely distant image is displayed on the right eye 6 (R). It becomes impossible to image. In order to form an image at infinity on the right eye 6 (R), the focal plane c of the eyepiece 6 (R) is the focal length range a and b of the variable focus microlens array 3 (R). The eyepiece 6 (R) must be configured to be located between The positions of the a-plane and b-plane vary depending on the specifications of the variable focus microlens array 3 (R). Further, the larger the distance d1 between the a-plane and the b-plane, the wider the depth of displayable depth, and it is possible to realize a deeper sense of depth (higher stereoscopic effect).

  In this way, the binocular 3D video display device A shown in FIG. 1 is configured by arranging the 3D video display devices A (R) and A (L).

  In the first embodiment, the video from the 3D video playback device 1 observed with both eyes has high image quality due to the optical distance (focal length) corresponding to the depth information of each pixel and the parallax between the left and right videos. It is recognized by an observer as a three-dimensional image having a high stereoscopic effect. Of color, brightness, optical distance, and parallax that constitutes real-world visual recognition, color and brightness are two-dimensional image display elements 3 (R) and 3 (L), and optical distance is variable focus micro. The parallax is obtained in the left and right images at the image formation position by the lens arrays 3 (R) and 3 (L). As a result, the binocular 3D image display apparatus A according to the first embodiment is capable of displaying a 3D image having a high stereoscopic effect without any sense of incongruity because there is no lack of information related to 3D recognition. Become.

  In the variable focus microlens arrays 3 (R) and 3 (L), it is desirable that each unit lens element is telecentric at least on the image side. By using image-side telecentricity, the image size does not change even if the image formation position changes. When the display distance (image formation distance) of adjacent pixels differs when the size of the image varies, the image of the pixel imaged at a short distance is displayed superimposed on the image of the pixel imaged at a long distance, etc. Cause problems.

  Further, in the configuration in which the eyepiece 6 is not used, it is a very large device for displaying a 3D image with a size covering the visual field.

  Note that the 3D video display devices A (R) and A (L) according to the first embodiment can display 3D video with A (R) or A (L) alone. In this case, although the stereoscopic effect is reduced due to the lack of binocular parallax information as compared with the binocular 3D image display apparatus A, the display image formed by the variable focus microlens array is formed based on the depth information, so that the conventional tertiary A high stereoscopic effect can be obtained compared to the original video display device.

(First modification of the first embodiment)
FIG. 3 shows a first modification of the 3D image display apparatus according to the first embodiment. In the first modified example, the first between the two-dimensional image display element 2 (hereinafter, the left eye and the right eye are collectively described. The same applies to other members) and the variable focus microlens array 3. The difference is that the intermediate imaging lens 7 is arranged. The same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 3, the first intermediate imaging lens 7 enlarges the display image of the two-dimensional image display element 2 and projects it on the variable focus microlens array 3.

  Since the unit pixel of the two-dimensional image display element 2 only needs to modulate the intensity of light, the pixel structure is relatively simple and can be easily downsized. On the other hand, the unit lens element of the variable focus microlens array 3 has a complicated structure compared to the unit pixel of the 2D image display element 2 because it needs to have a refractive index distribution in a plane, and is as small as the 2D image display element 2. It is thought that it is difficult to make it.

  In the first modification, the first intermediate imaging lens 7 is configured to expand the unit pixel of the two-dimensional image display element 2 to substantially the same size as the unit lens element of the variable focus microlens array 3. As a result, the image displayed on each pixel can be incident on the corresponding unit lens element, and the 3D image display device A can be obtained by combining the 2D image display element 2 and the variable focus microlens array 3 having different sizes. Can be configured.

  It is desirable that the first intermediate imaging lens 7 has a telecentric configuration at least on the image side. By making the image side telecentric, the light from the two-dimensional image display element 2 can be efficiently incident on the variable focus microlens array 3 and the light utilization efficiency is improved, so that a bright image can be displayed. More preferably, a double-sided telecentric configuration is desirable. If the object side telecentric is used, a three-plate type display element using a dichroic prism together can be used for the two-dimensional image display element 2.

  Other operations and effects are the same as those of the first embodiment described above, and a description thereof will be omitted.

(Second modification of the first embodiment)
FIG. 4 shows a second modification of the 3D image display apparatus according to the first embodiment. In the second modification, a second intermediate image is formed between the variable focus microlens array 3 (hereinafter, the left eye and the right eye are collectively described, and other members are also the same) and the eyepiece 6. The difference is that the lens 8 is arranged. The same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 4, the variable focal length interval d1 of the image plane 4 by the variable microlens array 3 may be insufficient to obtain a high stereoscopic effect. For example, this may occur when the two-dimensional image display element 2 and the variable focus microlens array 3 are configured with small elements for cost reduction.

  In the second modified example, the second intermediate imaging lens 8 is disposed between the image plane 4 and the eyepiece lens 6, and the image plane 4 is enlarged and projected onto the image plane 9, so that the variable focal length interval is changed from d1. It is possible to expand to d2. By enlarging and projecting the image plane 4 on the image plane 9 in this way, the display area viewed from the observation eye 5 is expanded and the depth direction is also expanded, and sufficient depth expression is possible and a high three-dimensional feeling is achieved. An image can be displayed.

  In addition to the second intermediate imaging lens 8, another intermediate imaging lens may be connected and disposed. Further, by making the second intermediate imaging lens 8 variable in magnification, it is possible to optically change the image magnification ratio of the image plane 9.

  Note that it is also possible to configure a 3D video display device by combining the above-described first modification and the second modification. By using the first intermediate imaging lens and the second intermediate imaging lens, the selection range of the two-dimensional display element 2 and the variable focus microlens array 3 is widened, and the design of the three-dimensional video display device is facilitated.

  Other operations and effects are the same as those of the first embodiment described above, and a description thereof will be omitted.

(Second Embodiment)
Next, a 3D image display apparatus according to a second embodiment of the present invention will be described with reference to the drawings.

  FIG. 5 is a schematic configuration diagram of a 3D video display apparatus according to the second embodiment of the present invention. In the second embodiment, a polarization control type display element (abbreviation of LCoS: Liquid Crystal on Silicon) is used as the two-dimensional image display element. In addition, the same code | symbol is attached | subjected and demonstrated to the structure similar to 1st Embodiment.

  In FIG. 5, the 3D image display device B reflects the illumination device 10 and a light beam polarized in a specific direction from the illumination device 10 and enters the 2D image display device 12. A polarization separation element 20 having a polarization separation unit 20a that transmits a light beam whose polarization direction is modulated and reflected is disposed. The light beam transmitted and emitted through the polarization separation element 20 is projected onto the variable focus microlens array 3 via the first intermediate imaging lens 7. The unit lens element of the variable focus microlens array 3 corresponding to at least one of the pixels of the 2D video display element 12 has a focal length based on depth information sent from the 3D video playback device 1 (see FIG. 1). The changed image displayed on the two-dimensional image element 12 is imaged. The light beam emitted from the variable focus microlens array 3 is changed in the traveling direction by the deflecting mirror 15 and enlarged and projected onto the observation eye 5 through the eyepiece 6. In this way, the 3D image display apparatus B according to the second embodiment is configured.

  In the second embodiment, a polarization control element (LCoS) is used by disposing a polarization separation element 20 between the two-dimensional image display element 12 and the variable microlens array 3 and providing an illumination device 10. Is possible.

  Note that the eyepiece 6 may be disposed on the light emitting side of the variable focus microlens array 3 as in the first embodiment without inserting the deflection mirror 15 into the optical path.

  The operation and effect of the variable focus microlens array 3 in the 3D image display apparatus B are the same as those in the first embodiment, and a description thereof will be omitted. In addition, as will be described later, the binocular 3D video display device can be configured by arranging a set of the 3D video display device B for the left eye and the right eye.

  In the variable focus microlens array 3, it is desirable that each unit lens element is telecentric at least on the image side. By using image-side telecentricity, the image size does not fluctuate even if the image formation position changes.

  Other operations and effects are the same as those of the first embodiment, and the description thereof is omitted.

(First modification of the second embodiment)
FIG. 6 is a schematic configuration diagram of a first modification of the 3D image display apparatus according to the second embodiment. The same components as those in the second embodiment are denoted by the same reference numerals and will be described.

  In FIG. 6, in the first modification, the 3D image display device C reflects the illumination device 10 and the light beam polarized in a specific direction from the illumination device 10 and enters the 2D image display device 12. A polarization separation element 20 having a polarization separation unit 20a that transmits a light beam whose polarization direction is modulated and reflected by the two-dimensional image display element 12 is disposed. The light beam transmitted and emitted through the polarization separation element 20 is projected onto the variable focus microlens array 3 by the first intermediate imaging lens 7. A first deflection mirror 15 is disposed between the first intermediate imaging lens 7 and the variable focus microlens array 3, and the optical path is deflected by approximately 90 degrees. The unit lens element of the variable focus microlens array 3 corresponding to at least one of the pixels of the 2D video display element 12 has a focal length based on depth information sent from the 3D video playback device 1 (see FIG. 1). The changed image displayed on the two-dimensional image element 12 is imaged. This image is magnified by the second intermediate imaging lens 8, the optical path is deflected by approximately 90 degrees by the second deflecting mirror 16, and magnified and projected onto the observation eye 5 through the eyepiece 6. In this way, the 3D image display apparatus C according to the first modification is configured.

  In the first modified example, since the outgoing optical axis of the light beam from the two-dimensional video display element 12 and the incident optical axis to the observation eye 5 are configured to be substantially parallel, a binocular three-dimensional video display device described later is configured. It becomes easy. In addition, since the optical path of the optical system is formed by bending with a deflecting mirror, the three-dimensional image display device can be further downsized.

  Other operations and effects are the same as those of the second embodiment, and a description thereof will be omitted.

(Second modification of the second embodiment)
FIG. 7: shows the schematic block diagram of the 2nd modification of the three-dimensional video display apparatus concerning 2nd Embodiment. The second modification is different in that the second deflection mirror of the first modification is a combiner (optical path coupling element). The other components similar to those of the first modification will be described with the same reference numerals.

  In FIG. 7, in the second modification, the 3D image display device D reflects the illumination device 10 and the light beam polarized in a specific direction from the illumination device 10 and enters the 2D image display device 12. A polarization separation element 20 having a polarization separation unit 20a that transmits a light beam whose polarization direction is modulated and reflected by the two-dimensional image display element 12 is disposed. The light beam transmitted and emitted through the polarization separation element 20 is projected onto the variable focus microlens array 3 by the first intermediate imaging lens 7. A first deflection mirror 15 is disposed between the first intermediate imaging lens 7 and the variable focus microlens array 3, and the optical path is deflected by approximately 90 degrees. The unit lens element of the variable focus microlens array 3 corresponding to at least one of the pixels of the 2D video display element 12 has a focal length based on depth information sent from the 3D video playback device 1 (see FIG. 1). The changed image displayed on the two-dimensional image element 12 is imaged. The image of the variable focus microlens array 3 is magnified by the second intermediate imaging lens 8, imaged in the vicinity of the focal position of the eyepiece 6, and the observation eye 5 through the eyepiece 6 and the combiner (optical path coupling element) 17. Is magnified and projected. The combiner 17 deflects the emitted light beam from the eyepiece lens 6 by approximately 90 degrees and enters the observation eye 5, transmits the real image of the outside world and enters the observation eye 5, and superimposes both to enable observation. Thus, the 3D image display apparatus D according to the second modification is configured.

  In the second modified example, the outgoing optical axis of the light flux from the two-dimensional image display element 12 and the incident optical axis to the observation eye 5 are configured to be substantially parallel, and a real image of the outside world and the two-dimensional video display element 12 are combined by the combiner 17. It is possible to observe three-dimensionally by superimposing the images displayed on the screen. In addition, since the optical path of the optical system is configured by bending with a mirror element, it is possible to configure a small see-through type head mounting display using a binocular 3D image display device, which will be described later.

  As the combiner 17, a half mirror, a hologram, a variable reflectivity mirror, or an optical member in which these are combined with an optical element such as a liquid crystal can be used. The type of the combiner 17 may be selected according to the purpose of combining the real image of the outside world and the video displayed on the two-dimensional video display element.

  Other operations and effects are the same as those of the second embodiment and the first modification, and a description thereof is omitted.

(Third Modification of Second Embodiment)
FIG. 8 is a schematic configuration diagram of a third modification of the 3D image display apparatus according to the second embodiment. In the third modification, a reflective variable focus microlens array is used as the variable focus microlens array. Other configurations similar to those of the second embodiment are denoted by the same reference numerals and described.

  In FIG. 8, in the third modification, the 3D image display device E includes the illumination device 10, and the light beam emitted from the illumination device 10 is polarized in a specific direction by the polarization adjustment filter 18, and the polarization separation element 20. Is reflected on the two-dimensional image display device 12 via the first intermediate imaging lens 7. The light beam whose polarization direction is modulated and reflected by the two-dimensional image display element 12 is incident again on the polarization separation element 20 through the first intermediate imaging lens 7 and is transmitted through the polarization separation unit 20a to pass through the polarization separation element 20. The light is emitted and projected onto the reflective variable focus microlens array 23 disposed at a position facing the two-dimensional image display element 12 with the deflection separation element 20 interposed therebetween. The light emitted from the polarization separation element 20 passes through the quarter-wave plate 19 and becomes circularly polarized light, and enters the reflective variable focus microlens array 23. The unit lens element of the reflective variable focus microlens array 23 corresponding to at least one pixel of the two-dimensional image display element 12 has a focal length based on depth information sent from the three-dimensional image reproduction device 1 (see FIG. 1). And the image displayed on the two-dimensional image display element 12 is imaged. The light beam reflected by the reflective variable focus microlens array 23 and adjusted in focal length is converted into linearly polarized light whose deflection direction is 90 degrees different from that of the incident light beam by the quarter wavelength plate 19 and is incident on the polarization separation element 20. Then, the light is reflected in the direction of the second intermediate imaging lens 8 by the polarization separation unit 20 a, enlarged by the second intermediate imaging lens 8, and enlarged and projected onto the observation eye 5 through the eyepiece 6. In this way, the 3D image display apparatus E according to the third modification is configured.

  The first intermediate imaging lens 7 can shorten the overall length of the lens by using a microlens array having a fixed focal length such as a fly-eye lens.

  In the third modified example, a fly-eye lens is used for the reflective variable focus microlens array 23 and the first intermediate imaging lens 7, so that a smaller three-dimensional image table device can be configured.

  Note that, as in the second modification of the second embodiment, by arranging a deflecting mirror and a combiner in the optical path, the 3D image display device can be further reduced in size, and a see-through type head mounting display or the like can be provided. It is also possible to configure.

  Other operations and effects are the same as those of the second embodiment and the modified example of the second embodiment, and a description thereof will be omitted.

(Configuration example of head mounting display)
FIG. 9 is a schematic configuration diagram of a binocular 3D video display device configured with the 3D video display device according to the second embodiment of the present invention. This configuration example shows a case where a head mounting display is configured using the 3D video display device shown in the second modification of the second embodiment. The configuration is the same as that of the second modification, the same reference numerals are given, and the description thereof is omitted.

  In FIG. 9, a 3D image display device is provided with a pair of right eye C (R) and left eye C (L) to form a head mounting display. The display image information of the right eye C (R) and the left eye C (L) is sent from the 3D image reproduction apparatus 1 to the 2D image display elements 2 (R) and 2 (L), respectively, and also to each pixel. Corresponding depth information is sent to the variable-focus microlens arrays 3 (R) and 3 (L), respectively, and the focal lengths are adjusted, and the observation eye 5 (R) is passed through the eyepieces 6 (R) and 6 (L). ) And 5 (L), respectively.

  In this head mounting display, the images displayed on the two-dimensional image display elements 2 (R) and 2 (L) and formed by the variable focus microlens arrays 3 (R) and 3 (L) are displayed in both eyes together with depth information. It also has parallax information, and can display a 3D image having high image quality and high stereoscopic effect.

  In addition, by using a wide-angle visual field eyepiece for the eyepieces 5 (R) and 5 (L), it is also possible to display a three-dimensional image having a size that covers the visual field.

  Further, by using the 3D video display device D shown in FIG. 7 as the 3D video display device, a see-through type head mounting display can be configured. By using a see-through type head mounting display, it becomes possible to superimpose and display a 3D image without a sense of incongruity on the real image of the outside world.

  In the above-described embodiments and modifications, the two-dimensional image display element may be either a self-luminous type or a reflective type, and a transmissive liquid crystal, a reflective liquid crystal, an EL device, an LED device, or the like can be used. The variable focus microlens array may be either a transmission type or a reflection type, and a liquid crystal lens array, a MEMS lens array, or the like can be used. Which element is used may be properly selected depending on the required design specifications.

  The above-described embodiment is merely an example, and is not limited to the above-described configuration and shape, and can be appropriately modified and changed within the scope of the present invention.

1 is a schematic configuration diagram of a binocular three-dimensional video display device according to a first embodiment of the present invention. It is the schematic explaining the operation | movement principle of the three-dimensional video display apparatus of FIG. It is a schematic block diagram of the 1st modification of the three-dimensional video display apparatus shown in FIG. It is a schematic block diagram of the 2nd modification of the three-dimensional video display apparatus shown in FIG. It is a schematic block diagram of the three-dimensional video display apparatus concerning 2nd Embodiment of this invention. The schematic block diagram of the 1st modification of the three-dimensional video display apparatus concerning 2nd Embodiment is shown. The schematic block diagram of the 2nd modification of the three-dimensional video display apparatus concerning 2nd Embodiment is shown. The schematic block diagram of the 3rd modification of the three-dimensional video display apparatus concerning 2nd Embodiment is shown. It is the schematic block diagram which comprised the binocular 3D video display apparatus with the 3D video display apparatus concerning 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 3D video reproduction apparatus 2 2D video display apparatus 3 Variable focus micro lens array 4 Image surface 5 Observation eye 6 Eyepiece 7 First intermediate imaging lens 8 Second intermediate imaging lens 9 Image surface 10 Illumination device 12 Two-dimensional Video display device 15 Deflection mirror (first deflection mirror)
16 Second deflection mirror 17 Combiner 18 Polarization adjustment filter 19 1/4 wavelength plate 20 Polarization separation element 23 Reflective variable focus microlens array A (Binocular) 3D image display device B, C, D, E 3D image display apparatus

Claims (14)

A two-dimensional image display element;
A lens array in which unit lens elements corresponding to at least one pixel of the two-dimensional image element and capable of changing a focal length based on depth information of an image displayed on the pixel are two-dimensionally arranged;
An eyepiece for projecting the image formed by the lens array;
A three-dimensional video display device comprising:   The three-dimensional image display apparatus according to claim 1, wherein the lens array is telecentric at least on the image side.   The three-dimensional image display device according to claim 1, wherein the lens array is a microlens array.   The three-dimensional image display device according to any one of claims 1 to 3, wherein the lens array is a liquid crystal lens array.   5. The three-dimensional image display device according to claim 1, wherein a focal position of the eyepiece lens is within a variable focal length range of the lens array. A first intermediate imaging lens between the two-dimensional image display element and the lens array;
6. The three-dimensional image display apparatus according to claim 1, wherein the first intermediate imaging lens projects an image displayed on the two-dimensional image display element onto the lens array. 7. .   The three-dimensional image display apparatus according to claim 6, wherein the first intermediate imaging lens has a magnification. A second intermediate imaging lens disposed between the lens array and the eyepiece;
The said 2nd intermediate image formation lens projects the image | video displayed on the said two-dimensional image display element imaged by the said lens array on the said eyepiece lens. 3D image display device according to item.   The 3D image display apparatus according to claim 8, wherein the second intermediate imaging lens has an enlargement magnification.   The tertiary according to any one of claims 1 to 9, wherein at least one of the first intermediate imaging lens, the second intermediate imaging lens, and the eyepiece includes a telecentric system. Original video display device. A lighting device;
A polarization separation element provided on the output side of the image displayed on the two-dimensional image display element;
The polarization separation element reflects a polarized light beam in a specific direction from the illumination device and enters the two-dimensional image display element, and transmits the light beam modulated and reflected by the two-dimensional image display element to transmit the two-dimensional image. The three-dimensional image display device according to claim 1, wherein an image displayed on a display element is projected onto the lens array. Having at least one deflection mirror;
The three-dimensional image display device according to any one of claims 1 to 11, wherein an optical path of an image displayed on the two-dimensional image display element is deflected and projected. One of the deflection mirrors is a combiner;
13. The three-dimensional video display device according to claim 12, wherein the video displayed on the two-dimensional video display device and the real image of the outside world can be superposed and observed via the combiner. A set of the 3D image display device according to any one of claims 1 to 13 for the left eye and the right eye,
3. A three-dimensional image display device, wherein a left-eye image is displayed on the two-dimensional display element for the left eye, and a right-eye image is displayed on the two-dimensional display element for the right eye.

Images