JP2005165236A - Method and device for displaying stereoscopic image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for displaying a stereoscopic image realizing the manufacture and the installation of the device really, securing image quality and an observation area fit for general stereoscopic image presenting purpose and also displaying the stereoscopic image whose unnatural feeling given to eyes is restrained to be small to a plurality of observers at the same time. <P>SOLUTION: The device for displaying a stereoscopic image is equipped with image projecting devices arranged lengthwise and breadthwise, a fly-eye lens to diffuse light beams from light sources which are projected from the adjacent image projecting devices so as to nearly proximately connect them each other, and a convex lens optical system to generate the real images of the respective light sources diffused to be nearly proximate. The images from the different image projecting devices are replaced and made incident nearly continuously in accordance with the movement of the observation position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

Industrial application fields

The present invention relates to a method and apparatus for displaying a stereoscopic image.

  Conventionally, as a stereoscopic image display device combining a plurality of image projection devices and various lenses, three-dimensional image engineering (Takayoshi Ohkoshi, Asakura Shoten) pp. A number of schemes have already been proposed, as summarized in 81-111. However, these methods have problems such as difficulty in production and installation, inadequate image quality, and limited area in which stereoscopic images can be observed, and have not yet spread on a practical level. . Also, except for some stereoscopic display methods such as holograms, especially when presenting video to the viewer, the eye convergence is based on the eye focus adjustment and the parallax of the right eye image and the left eye image. The contradiction that occurs between and the eye increases, and the burden of discomfort and fatigue on the eyes is large. As a conventional technique for reducing this burden, in Japanese Patent No. 3425402, a spatial image (optical real image) is generated at the observer's hand using a lens, and the contradiction between the focus adjustment and the convergence angle that occurs in the observer's eyes. Although a method of keeping the size small has been proposed, only a single observer can observe a correct stereoscopic image according to the viewpoint at the same time. On the other hand, with respect to holograms, it is currently possible to display still images such as photographs, but it is difficult to display images output from a computer in real time.

Problems to be solved by the invention

  Thus, in the conventional stereoscopic display method, in addition to the difficulty in production and installation, the image quality, the size of the observation area and the number of observers that can be observed at the same time, a stereoscopic image with a little discomfort given to the eyes is displayed. There was difficulty in terms.

  The present invention can be practically manufactured and installed, and can ensure an image quality and an observation area that can withstand general stereoscopic image presentation applications, and at the same time, a stereoscopic image with a small sense of discomfort given to the eyes can be simultaneously applied to a plurality of observers. It is an object to provide a method and apparatus for displaying.

Means for solving the problem

  In order to achieve the above object, the invention according to claim 1 is configured so that the image projection devices arranged vertically and horizontally and the light from the light source projected from the adjacent image projection device are connected in close proximity to each other. Equipped with a diffusing fly-eye lens and a convex lens optical system that generates a real image of each light source diffused so as to be substantially close to each other. It is characterized by having the structure which injects.

  According to a second aspect of the present invention, in the apparatus according to the first aspect, the convex lens optical systems are arranged at a plurality of locations so as to generate a real image of the fly-eye lens together with a real image of the light source of the image projection apparatus. It is characterized by that.

  According to a third aspect of the present invention, there is provided an apparatus according to any one of the first or second aspect, further comprising a configuration in which a reflecting mirror is provided in the optical path.

  According to a fourth aspect of the present invention, in the apparatus according to any one of the first to third aspects, the change of the incident image according to the movement of the observation position occurs at an interval smaller than the size of the pupil of the eye. It is characterized by having.

  First, the outline | summary of this invention and 1st embodiment of this invention are demonstrated using FIG. FIG. 1 includes an image projector 1 arranged vertically and horizontally, a fly-eye lens 2, and a Fresnel lens 3 forming a convex lens optical system. The light projected from the image projection device 1 is diffused by the fly-eye lens 2. By arranging the fly-eye lens 2 having an appropriate focal length at an appropriate position, the diffusion results from the image projection device 1. The projected light comes close to each other. In addition, a real image of light projected from each image projection device is generated by the Fresnel lens 3 in the vicinity of the right eye 5 and the left eye 6 of the viewer 4, and the viewer 4 is different from the image projection device according to the viewpoint position. The projected light will be observed. By causing each image projector to display an image that can be seen from a place where a real image of the light source of the image projector can be displayed, the observer 4 can observe a three-dimensional image corresponding to the viewpoint. By increasing the number of image projection devices, it is possible to expand the region where the stereoscopic image is observed, and as a result, a plurality of observers can simultaneously observe the stereoscopic image corresponding to each viewpoint. When the fly-eye lens 2 is not accompanied, as shown in FIG. 2, depending on the position of the observer, the light does not enter the right eye 5 or the left eye 6, and a stereoscopic image cannot be observed.

  Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, a Fresnel lens 30 forming a convex lens optical system is further added to the optical system of the first embodiment. In the first embodiment, a virtual image of the fly-eye lens 2 that diffuses light is generated at a position farther away from the fly-eye lens 2 when viewed from the observer 4, and this is the focus adjustment point of the observer 4. It becomes. In this case, if a stereoscopic image is to be presented in a place close to the observer 4 only by parallax presentation, the stereoscopic image may not be fused or extreme fatigue may occur due to contradiction of eye convergence adjustment. The evils often occur. In the second embodiment, the Fresnel lens 30 is installed at a location in front of the location where the real image of the light source of the image projection apparatus can be obtained. In this case, since the real image of the light source of the image projection apparatus is formed again in the vicinity of the observer 4, the observer 4 uses the light projected from different image projection apparatuses according to the viewpoint position as in the first embodiment. Can be observed. Further, since the real image 20 of the fly-eye lens 2 is connected between the Fresnel lens 30 and the observer 4, the focus adjustment point of the observer 4 is the position of the real image 20. Therefore, when a stereoscopic image is presented near the observer 4, the contradiction in convergence adjustment is reduced, and adverse effects peculiar to stereoscopic vision are suppressed.

  Hereinafter, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the reflecting mirror 7 is installed between the Fresnel lens 30 and the Fresnel lens 31 in the same optical system as the second embodiment. Thereby, the same optical system as that of the second embodiment can be installed in a space-saving manner.

  Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, the installation interval of the image projection apparatus in the first embodiment is narrowed so that light from a plurality of image projection apparatuses enters the size of the pupil of the eye. As a result, monocular stereoscopic vision based on focus adjustment becomes possible, contradiction of convergence adjustment in binocular stereoscopic vision is resolved, and adverse effects on eyes peculiar to stereoscopic vision can be eliminated.

  Hereinafter, a fifth embodiment of the present invention will be described with reference to FIG. In this embodiment, the installation interval of the image projection apparatus in the second embodiment is narrowed so that light from a plurality of image projection apparatuses enters the size of the pupil of the eye. Also according to the fourth embodiment, when the resolution of the pixels projected from each image projection device is sufficiently high, it is possible to present a stereoscopic image in which the contradiction of the convergence adjustment is resolved to the viewer 4, When the resolution is low, it is difficult to reproduce such rays. On the other hand, in this embodiment, even if the resolution of the pixel is low, it is easy to reproduce the light beam of the stereoscopic image that resolves the contradiction of the convergence adjustment at the hand of the observer 4 and to a place away from the observer 4. In the stereoscopic image presentation, it is possible to perform light beam reproduction with less discomfort given to the eyes as compared to the stereoscopic image presentation at hand in the fourth embodiment.

The invention's effect

Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.

  According to the first aspect of the present invention, it is possible to display an image so that images from different image projection apparatuses are incident on each other without being interrupted in accordance with the movement of the observer's viewpoint. The person can observe the stereoscopic image according to the viewpoint at the same time.

  According to the second aspect of the present invention, it is possible to present a stereoscopic image with a small contradiction in eye convergence adjustment to the observer.

  In the invention according to claim 3, it is possible to present a stereoscopic image in a small space.

  In the invention according to the fourth aspect, it is possible to present a stereoscopic image having no contradiction in convergence adjustment to the observer's eyes.

  1 is a schematic diagram showing an outline of the present invention and a first embodiment.   It is a schematic diagram which shows the condition at the time of not containing a fly eye lens in 1st embodiment of this invention.   It is a schematic diagram which shows 2nd embodiment of this invention.   It is a schematic diagram which shows 3rd embodiment of this invention.   It is a schematic diagram which shows 4th embodiment of this invention.   It is a schematic diagram which shows 5th embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image projector 2 Fly eye lens 3 Fresnel lens 4 Observer 5 Right eye 6 Left eye 7 Reflector 20 The real image 30 of a fly eye lens Fresnel lens 31 Fresnel lens

Claims (4)

  Image projectors arranged vertically and horizontally, a fly-eye lens that diffuses light from light sources projected from adjacent image projectors so as to be connected in close proximity to each other, and each light source that is diffused so as to be in close proximity And a convex lens optical system for generating a real image, and a structure for displaying a stereoscopic image characterized by comprising a configuration in which images from different image projection apparatuses are switched without incident in accordance with movement of an observation position. And equipment.   The apparatus according to claim 1, comprising a configuration in which convex lens optical systems are arranged at a plurality of locations so as to generate a real image of a fly-eye lens together with a real image of a light source of an image projection device. And equipment.   3. The method and apparatus for displaying a stereoscopic image according to claim 1, further comprising a configuration in which a reflecting mirror is placed in the optical path.   The apparatus according to any one of claims 1 to 3, comprising a configuration in which replacement of an incident image according to movement of an observation position occurs at an interval smaller than the size of an eye pupil. Method and apparatus.

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