JP2011033820A - Three-dimensional image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-dimensional image display device using the integral display, configured to solve the following problem: even if a large-aperture convex lens as a component of the three-dimensional image display device is enlarged, aberration of an observed image becomes larger starting from a peripheral visual field to degrade image quality. <P>SOLUTION: The three-dimensional image display device includes: image display surfaces for displaying images for each of right and left eyes; and a sorting optical system configured to receive the light from the image display surfaces and sort the image into the right eye image and the left eye image. The sorting optical system is constituted by using a plurality of integral display units for presenting a real image or virtual image of the display surface image to an observer. Each of the integral display units is arranged so that the normal lines of the image display surfaces may have an intersecting point, and thereby even when the large-aperture convex lens is enlarged in order to increase a viewing angle or enlarge an angle of view, an increase in aberration of an observed image starting from a peripheral visual field to degrade image quality is mitigated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a three-dimensional image display device of a ray reproduction system, and particularly a problem caused by enlarging a large-diameter convex lens as a constituent element in order to increase a viewing angle or to expand an angle of view, that is, an observation The present invention relates to a three-dimensional image display device that can solve the problem that the aberration of an image to be generated increases from the peripheral visual field and the image quality is degraded.

  3D display devices can be displayed closer to the real thing, so in addition to display for display, they are used in computer games, simulators for training, display devices for remote operation of devices, etc. is doing. However, it is known that when a stereoscopic display device is used for a long time, fatigue different from that of a normal flat display device remains.

  The direction of the line of sight when staring at a certain point in space (convergence: movement that becomes a cross-eyed when looking at nearby objects), the amount of image shift (binocular parallax) seen in the left and right eyes, the thickness of the lens It is known that a solid is perceived by three (focal length). For example, a stereoscopic display using glasses uses a polarizing filter or a liquid crystal shutter to input different images to the left and right eyes, thereby realizing binocular parallax and a convergence angle. However, these three-dimensional display methods have a problem in that there is a physiological contradiction between convergence and focus adjustment, and the eye fatigue peculiar to stereoscopic vision is caused by the convergence angle between both eyes and the focus adjustment of each eye. It is said that this is largely due to the contradiction in congestion adjustment. Many methods have already been proposed to solve this problem.

  One of them is a ray reproduction type solution, and a typical example is a hologram. However, with holograms, the amount of information to be processed is enormous, so it is difficult at present to achieve this with an electronic display. Further, as a method for realizing electronically fine light beam reproduction, a super multi-view system is known (Non-Patent Documents 1 and 2).

  The inventors of the present invention have disclosed a coarse integral volume display method in which integral lenses are used to enlarge individual lenses constituting a fly-eye lens and multilayer the display panel portion (see Japanese Patent Application Laid-Open No. 2008-151). 015121). In this method, since a volumed real image (or virtual image) is observed, congestion adjustment contradiction is reduced. In addition, since the multi-viewpoint system is combined, the images displayed on the front and rear panels are not separated when viewed from an oblique angle by hearing the number of panels to some extent. Furthermore, occlusion (occlusion relationship between objects) and glossy surface can be expressed.

  However, in the conventional proposal, a large-diameter convex lens as a constituent element is increased in order to increase a viewing angle or an angle of view in a three-dimensional image display device of a ray reproduction method, particularly an integral imaging method. Then, since the aberration of the observed image becomes large from the peripheral visual field and the image quality is deteriorated, it is required to solve this.

  An outline of a conventional integral imaging type three-dimensional image display apparatus is shown in FIGS. In the configuration of FIG. 7A, a convex lens array and a Fresnel lens as a large aperture condensing system are arranged in front of the display surface to present a real image to the observer. In the configuration of FIG. 7B, a display surface, a convex lens array, and a large aperture condensing system are arranged near the observer to present a virtual image to the observer. In FIG. 7C, a plurality of real images are presented to the observer to provide a more realistic feeling.

JP 2008-015121 A

Yoshihiro Yuki, Hiroshi Yoshikawa, Ikuo Honda, Super multi-view 3D display with focused light source array (FLA), Proceedings of 3D image conference 1996, pp.108-113, 1996. Yasuhiro Takagi, Displaying 3D Objects Combining with a 64 Eye 3D Color Display, 3D Image Conference 2002 Proceedings, pp. 85-88, 2002.

  The present invention realizes a three-dimensional image display device in which the problem that the aberration of an observed image increases from the peripheral visual field and the image quality deteriorates even when the large-diameter convex lens that is a constituent element is enlarged is realized.

The present invention is a three-dimensional image display device using an integral display method, an image display surface for displaying an image for each of the right eye and the left eye, and light for the right eye and for the left eye incident on the light from the image display surface. A sorting optical system for sorting images, wherein the sorting optical system is composed of a plurality of integral display units configured to present a real image or a virtual image of the display surface image to an observer. Is arranged so that the normal of the image display surface has an intersection, so that the aberration of the observed image can be increased even if the large-diameter convex lens is enlarged in order to enlarge the viewing angle or enlarge the angle of view. However, it will alleviate the decrease in image quality due to the increase in peripheral vision.

  The sorting optical system is, for example, a condensing system array arranged in a plane along the image display surface.

  The condensing system array is, for example, a plurality of gradient index lens arrays.

  For example, the image display surface and the arrangement surface of the condensing system array are flat surfaces.

  The image display surface and the arrangement surface of the condensing system array may be a cylindrical surface or a spherical surface. An arrangement surrounding the observer may also be used.

  The sorting optical system may be provided with a large-diameter condensing system to present a real image to the observer.

  A part of the depth information viewed from the observer is displayed on a plurality of display surfaces on the image display surface.

  The arrangement in the integral display unit is, for example, in the order of the image display surface, the condensing system array, the real image, and the observer.

  When the sorting optical system includes a large-diameter condensing system, the arrangement in the integral display unit is, for example, in the order of the image display surface, the condensing system array, the large-diameter condensing system, a real image, and an observer.

  Further, when the sorting optical system includes a large-diameter condensing system, the arrangement in the integral display unit is in the order of the virtual image, the image display surface, the large-diameter condensing system, the condensing system array, and the observer.

  According to the present invention, even if the large-aperture convex lens that is a constituent element is increased in order to increase the viewing angle or enlarge the angle of view, the aberration of the observed image increases from the peripheral visual field and the image quality deteriorates. A three-dimensional image display device in which problems are suppressed can be realized.

It is a figure which shows the three-dimensional image display apparatus using the integral display method of this invention. A display panel as an image display surface for displaying an image for each of the right eye and the left eye; a lens array as a sorting optical system that receives light from the image display surface and selects an image for the right eye and the left eye; and the lens A large-diameter condensing plate that condenses light from the array is provided, and the sorting optical system includes three sets of integral display units that present a real image of the display surface image to an observer. By arranging each integral display unit so that the normal of the image display surface has an intersection point, the aberration of the observed image becomes large even if a large-diameter convex lens is used for the large-diameter condensing system. That is, there is no deterioration in image quality. A real image is presented around the intersection. It is a figure which shows the example which was made to show a 360 degree three-dimensional image to an observer by making it the structure which surrounds an observer with eight sets of said integral display units. FIG. 3 is a diagram showing a configuration in which the number of integral display units is further increased in the configuration of FIG. 2 and arranged in a substantially cylindrical or spherical shape. In this case, an example in which the large-diameter condensing system can be omitted by condensing light at the center of a cylinder or a sphere is shown. It is a figure which shows the example which shows a several real image to an observer, and shows the image with the more realistic feeling. This can present a volumetric stereoscopic image, and by presenting a volumetric image, the connectivity of the video at the joint of the lens can be significantly improved. It is a figure which shows the three-dimensional image display apparatus which has arrange | positioned the convex lens array, the large aperture lens, and the display surface concentrically in order from the observer. In this example, a three-dimensional virtual image can be presented at the center of the concentric circles. 6 is a diagram showing a three-dimensional image display device in which a convex lens array, a large-diameter lens, and a display surface are arranged concentrically around an observer. In this example, a three-dimensional virtual image can be presented at 360 degrees around the observer. It is a figure which shows the outline | summary of the three-dimensional image display apparatus of the conventional integral imaging system. It is a block diagram of an example of an integral display unit.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In the following description, devices having the same function or similar functions are denoted by the same reference numerals unless there is a special reason.

  Since the present invention is a three-dimensional image display device that performs integral volume display, it generally has the configuration shown in FIG. FIG. 8 is a block diagram of an example of an integral display unit. That is, a display surface 1 for displaying pixels and a plurality of condensing systems that enter the light from the display surface 1 and emit parallel light beams that are substantially parallel are formed adjacent to each other along the display surface. A condensing system array 2, and a large-diameter condensing system 3 that receives parallel light beams substantially parallel from the condensing system array 2 and emits the light toward the eyes of the observer 5. The large-diameter condensing system 3 is provided to form an image on the imaging plane 4 between the large-diameter condensing system 3 and the observer 5. However, the image forming surface here is a virtual two-dimensional surface extending from the image forming point of the image on the display surface. Further, a parallel light beam that is substantially parallel does not form an image between the above-described condensing system array 2 and the large-diameter condensing system 3, but forms an image between the large-diameter condensing system 3 and the observer 5. Parallel rays in range. The display surface 1 is controlled by a display controller 6.

  In FIG. 8, the observer 5 is arranged between the imaging surface 4 and the large-diameter condensing system 3 so that the image presented to the observer 5 is a virtual image, and the position is behind the display surface 1. can do.

  An example of the present invention is shown in FIG. This is a three-dimensional image display device using an integral display method, in which a display panel as an image display surface for displaying an image for each of the right eye and the left eye, and light from the image display surface is incident and used for the right eye And a lens array as a sorting optical system for sorting images for the left eye, and a large-diameter condensing plate that collects light from the lens array, and the sorting optical system provides a real image of the display surface image to an observer. Three sets of integral display units to be presented are provided. By arranging each integral display unit so that the normal of the image display surface has an intersection point, the aberration of the observed image becomes large even when a large-diameter convex lens is used for the large-diameter condensing system. That is, there is no deterioration in image quality. A real image is presented around the intersection.

  FIG. 2 shows a 360-degree three-dimensional image to the viewer by surrounding the viewer with eight sets of the integral display units.

  FIG. 3 shows a configuration in which the number of integral display units is further increased in the configuration of FIG. 2 and is arranged in a substantially cylindrical or spherical shape. In this case, the large-diameter condensing system can be omitted by condensing light at the center of the cylinder or sphere.

  FIG. 4 presents a plurality of real images to the observer, and presents a more improved realistic image. This can be used when a stereoscopic image having a deeper depth is presented, and a stereoscopic image with a volume feeling can be presented. Also, by presenting a volumetric image, the video connectivity at the lens joint can be significantly improved. By using the configuration of FIG. 4 as an integral display unit and a configuration similar to that of FIG. 2 or FIG.

  The configuration of FIG. 5 is a three-dimensional image display device in which a convex lens array, a large-diameter lens, and a display surface are arranged concentrically in order from the observer. In this example, a three-dimensional virtual image can be presented at the center of the concentric circles.

  In the configuration of FIG. 6, a convex lens array, a large-diameter lens, and a display surface are arranged concentrically around an observer. In this example, a three-dimensional virtual image can be presented at 360 degrees around the observer.

  As the display surface, in addition to a color liquid crystal display, a plasma display, a color cathode ray tube display, a rear projection display, or the like can be used.

  In the above description, it is easy to understand that the condensing system array and the large-diameter condensing system have a fixed focal length. However, there is no problem even if these light collecting systems are variable focus light collecting systems. A more suitable display can be performed by using a variable focus condensing system and by slightly changing the focus characteristics for each scene.

  Further, in the above description, only one person is shown as an observer. However, even if the position of the observer is changed, the above description is valid, so for many observers, the multi-viewpoint of the present invention can be achieved. Obviously, the stereoscopic image of the stereoscopic display device can be observed simultaneously.

DESCRIPTION OF SYMBOLS 1 Display surface 2 Condensing system array 3 Large aperture condensing system 4 Imaging surface 5 Observer 6 Display controller

Claims (10)

A three-dimensional image display device using an integral display method,
An image display surface for displaying an image for each of the right eye and the left eye, and a selection optical system for selecting light for the right eye and the left eye by receiving light from the image display surface, Consists of a plurality of integral display units configured to present a real or virtual image of the display surface image to the observer,
A three-dimensional image display device, wherein each integral display unit is arranged such that the normal of the image display surface has an intersection.   The three-dimensional image display device according to claim 1, wherein the sorting optical system is a condensing system array arranged in a plane along the image display surface.   The three-dimensional image display device according to claim 2, wherein the condensing system array is a plurality of gradient index lens arrays.   4. The three-dimensional image display device according to claim 2, wherein the image display surface and the arrangement surface of the condensing system array are planes. 5.   4. The three-dimensional image display device according to claim 2, wherein the image display surface and the arrangement surface of the condensing system array are a cylindrical surface or a spherical surface.   6. The three-dimensional image display device according to claim 1, wherein the sorting optical system includes a large-diameter condensing system.   The three-dimensional image display device according to any one of claims 1 to 6, wherein the depth information viewed from the observer is displayed on a plurality of display surfaces of the image display surface.   6. The three-dimensional image display device according to claim 2, wherein the arrangement in the integral display unit is in the order of the image display surface, the condensing system array, the real image, and the observer. . The sorting optical system includes a large aperture condensing system,
6. The arrangement according to claim 2, wherein the arrangement in the integral display unit is in the order of the image display surface, the condensing system array, the large-diameter condensing system, the real image, and the observer. 3D image display device. The sorting optical system includes a large aperture condensing system,
The arrangement in the integral display unit is in the order of the virtual image, the image display surface, the large-diameter condensing system, the condensing system array, and the observer. 3D image display device.

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