JP2004157173A - Wide visual region retina projection type display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wide visual region retina projection type display system by a new system easy in miniaturization and color display in the wide visual region retina projection type display system utilizing Maxwell view. <P>SOLUTION: The wide visual region retina projection type display system constitutes optical systems 2, 4, 6 and 7 so that transmission light forms condensed points at a plurality of positions at prescribed intervals within the movable range of a pupil by irradiating a liquid crystal display 3 from a plurality of point light sources 1. Light transmitting the liquid crystal display 3 is condensed with the optical lens 4, and image quality is enhanced by eliminating high order refraction light with a plurality of pinholes 5a arranged at a focus position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a retinal projection display system using Maxwell vision.
[0002]
[Prior art]
In general, patients with dysfunction of the retina such as glaucoma, age-related macular degeneration, and partial retina damage or persons with reduced visual acuity often cannot recognize the visual target due to the imaged site on the retina.
[0003]
In Maxwellian vision, since the light of the object is focused on the center of the pupil and projected directly onto the retina, the object can be viewed without being affected by the accommodation function of the crystalline lens. Therefore, according to the optical system using Maxwell's vision, even the above-mentioned person with reduced visual acuity can see the object regardless of the adjusting function of the crystalline lens.
[0004]
However, in Maxwellian vision, an image cannot be observed unless the convergence point of the light is on the pupil, so that if the pupil moves, the image cannot be observed.
[0005]
Therefore, a plurality of light convergence points are arranged in a range in which the pupil moves so that the image can be observed even when the pupil moves, and a holographic optical element (HOE) is used so that any one of the convergence points passes through the pupil. Has been proposed (see Patent Document 1).
[0006]
Prior art document information related to the invention of this application includes the following.
[0007]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-277822
[Problems to be solved by the invention]
However, in the conventional retinal projection display system using the HOE, it is difficult to reduce the size and display the color.
[0009]
Accordingly, an object of the present invention is to provide a wide-viewing-area retinal projection type display system using Maxwell's vision, which uses a new system that is easy to miniaturize and color display.
[0010]
[Means for Solving the Problems]
The object of the present invention is characterized in that an optical system is configured to irradiate a liquid crystal display from a plurality of point light sources and to form convergent points at a plurality of positions at predetermined intervals within a movable range of a pupil, with the transmitted light thereof being characterized. This is achieved by a wide viewing area retinal projection display system.
[0011]
As the point light source, in addition to a point light source such as an LED lamp, a light source including a diffused light source and a plurality of pinholes irradiated by the diffused light source can be adopted.
[0012]
Further, the object of the present invention is to irradiate a liquid crystal display through a movable pinhole illuminated by a diffused light source, and light passing through the movable pinhole forms convergence points at a plurality of positions at predetermined intervals within a movable range of a pupil. The movable pinhole is configured so as to converge a light beam to a moving pupil position based on a position detection signal from a pupil position detecting device that detects pupil movement. This is achieved by a wide-view retinal projection display system.
[0013]
The transmitted light from the liquid crystal display is converged by an optical lens to form converging points at a plurality of positions, a plurality of pinholes are arranged at the converging point positions, and light passing through the pinholes is moved within a movable range of a pupil. Preferably.
[0014]
Further, the object of the present invention is to irradiate a liquid crystal display from a diffused light source, converge the transmitted light with an optical lens, arrange a plurality of pinholes at the focal position, and form a plurality of light beams emitted from the pinhole. This is achieved by a wide-view retinal projection display system, wherein the optical system is configured such that the bundle forms convergence points at a plurality of positions at predetermined intervals within the movable range of the pupil.
[0015]
In the wide viewing area retinal projection display system, a CCD camera may be provided, and image data from the CCD camera may be displayed on a liquid crystal display.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings. Throughout the drawings, the same components are denoted by the same reference numerals.
[0017]
FIG. 1 shows a conceptual diagram of a first embodiment of a wide-view retinal projection display system according to the present invention. The system shown in FIG. 1 includes a plurality of point light sources 1, a spherical convex lens 2, a liquid crystal display (LCD) 3, and a spherical convex lens 4. In FIG. 1, E is an eyeball. The light from each point light source 1 is converted into a parallel light beam by a spherical convex lens 2 and irradiates the liquid crystal display 3. The transmitted light is converged again by the spherical convex lens 4, and a plurality of light beams are arranged at predetermined intervals within the movable range of the pupil. A convergence point is formed at the position.
[0018]
In the illustrated example, the point light source 1 uses a high-luminance white LED. As shown in FIG. 1A, five LEDs, one on the central axis A and four on the circumference, are arranged at equal intervals, as shown in FIG. The number and arrangement are not limited to this embodiment. For example, various embodiments such as arranging one on the central axis line and arranging six (equivalent hexagonal apex positions) around the central axis at equal intervals may be used. Can be adopted.
[0019]
The adjacent distance between the plurality of convergence points by the spherical convex lens 4 is preferably a distance substantially equal to or slightly smaller than the diameter of the pupil. In the illustrated example, the distance between the convergence point on the center axis A and the convergence point around the center axis A is preferable. The distance L is set in a range of 1.5 to 2.0 mm. If the distance L is smaller than 1.5 mm, two convergence points will be located in the pupil, and the image projected on the retina will be dubbed. On the other hand, if the distance L is larger than 2.0 mm This is because when the pupil moves, there may be a case where no convergence point exists on the pupil, and a case where no image is projected on the retina.
[0020]
In the illustrated example, the liquid crystal display 3 is a color liquid crystal display, and an image is displayed by an image display control device (not shown).
[0021]
According to the wide-view retinal projection display system of the first embodiment having the above configuration, convergence points by the spherical convex lens 4 are formed at a plurality of positions on the pupil at predetermined intervals within the movable range of the pupil, and the pupil moves. Also, the retinal projection based on Maxwell's vision is performed. Therefore, the image can be recognized even if the pupil moves. Further, by using a small size such as an LED as a light source and using a small thin color liquid crystal display, miniaturization and colorization are easy. The miniaturization can also create a glasses-type system.
[0022]
FIG. 2 shows a schematic configuration of a wide-view retinal projection display system according to a second embodiment of the present invention. The system shown in FIG. 2 is different from the system shown in FIG. 1 in that a pinhole forming plate 5, in which a plurality of pinholes 5a are formed, a spherical convex lens 6, and a spherical convex lens 7, are added. It is similar to the system of FIG.
[0023]
The pinhole forming plate 5 is arranged such that the position of the pinhole 5 a is the focal position of the light beam by the spherical convex lens 4. When the light beam passes through the pinhole 5a of the pinhole forming plate 5, high-order diffracted light can be eliminated and the image quality can be improved.
[0024]
The light that has passed through the plurality of pinholes 5a is refracted by the spherical convex lens 6 to form a parallel light beam, and further converged by the spherical convex lens 7. The position of the convergence point by the spherical convex lens 7 is the same as in the case of the first embodiment.
[0025]
In this way, a plurality of convergence points are formed at predetermined intervals in the movable range of the pupil, and even when the pupil moves, retinal projection by Maxwell's vision is performed.
[0026]
FIG. 3 is a conceptual diagram showing a third embodiment of the wide-view retinal projection display system according to the present invention. The system of FIG. 3 differs from the system of the second embodiment in the light source, and the other configuration is the same, so that the detailed description is omitted.
[0027]
In FIG. 3, irradiation from the diffusion light source 1a is received by a pinhole forming plate 1c in which a plurality of pinholes 1b are formed, and light passing through the plurality of pinholes 1b is used as a light source. That is, the diffused light source 1a is converted into a plurality of point light sources by the pinhole forming plate 1c. As the diffusion light source 1a, for example, an EL (electroluminescence), a fluorescent lamp, a halogen lamp, a metal halide lamp, and a plurality of high-brightness white LEDs covered with a light diffusing plate can be used.
[0028]
FIG. 4 is a conceptual diagram showing a fourth embodiment of the wide-view retinal projection display system according to the present invention. The system shown in FIG. 4 is different from the third embodiment in that the pinhole forming plate of the third embodiment is changed to a pinhole forming device 1d, and the other configuration is the same as that of the third embodiment.
[0029]
The pinhole forming apparatus 1d forms a pinhole 1f using a liquid crystal display or the like and makes the position of the pinhole 1f movable. The position control of the pinhole 1f is performed by a control device (not shown).
[0030]
It is preferable to control the movable pinhole 1f to move in accordance with the movement of the pupil. For example, based on a position detection signal from a pupil position detection device (not shown) for detecting the movement of the pupil, that is, a so-called line-of-sight input signal, position control is performed so as to form a convergence point of the light beam at the moving pupil position. . As the pupil position detecting device, for example, a known method such as a method of detecting the position of a pupil movement captured by an eye camera such as a CCD by image processing or the like can be adopted.
[0031]
The liquid crystal display 3 can display image data from a CCD camera (not shown) set so as to capture the front of the observer. By doing so, a glasses-type display system can be obtained. In this case, the movement of the pupil is detected by the pupil position detection device, and the CCD camera that captures image data is moved in accordance with the movement of the pupil. It can also be displayed.
[0032]
Alternatively, a liquid crystal display may be connected to a personal computer or the like to display Internet images.
[0033]
FIG. 5 is a conceptual diagram showing a fifth embodiment of the wide-view retinal projection display system according to the present invention. The system of FIG. 5 is a configuration in which the pinhole forming plate and the spherical convex lens adjacent thereto are removed from the system of the third embodiment, and the light from the diffusion light source 1a is directly applied to the liquid crystal display 3. Is the same as in the third embodiment. After passing through the liquid crystal display 3, the diffused light from the diffused light source 1a is converged by the spherical convex lens 4, and after passing through a plurality of pinholes 5a provided corresponding to a plurality of convergence point positions, the spherical convex lenses 6,7. Thereby, a plurality of convergence points are formed at predetermined intervals within the movable range of the pupil of the eyeball E. As described above, as the diffusion light source 1a provided behind the liquid crystal display, for example, there is a backlight of a liquid crystal display, and if the backlight has a sufficient brightness, the present invention is applicable.
[0034]
【The invention's effect】
As apparent from the above description, according to the wide-view retinal projection display system of the present invention, light passing through the liquid crystal display forms a plurality of convergence points at predetermined intervals within the movable range of the pupil. Therefore, the image on the retina in Maxwell's view does not disappear due to the movement of the pupil, and is constituted by an optical system combining a light source, a liquid crystal display (liquid crystal display panel), and an optical lens, so that miniaturization is easy. In addition, color display can be easily performed.
[Brief description of the drawings]
FIG. 1 schematically shows a first embodiment of a wide-view retinal projection display system according to the present invention, wherein FIG. 1 (a) is an arrangement configuration diagram, and FIG. 1 (b) is X in FIG. 1 (a). -It is a X view side view.
FIG. 2 is an arrangement diagram schematically showing a second embodiment of the wide-view retinal projection display system according to the present invention.
FIG. 3 is a layout diagram schematically showing a third embodiment of the wide-view retinal projection display system according to the present invention.
FIG. 4 is an arrangement diagram schematically showing a fourth embodiment of the wide-view retinal projection display system according to the present invention.
FIG. 5 is a layout diagram schematically showing a fifth embodiment of the wide-view retinal projection display system according to the present invention.
[Explanation of symbols]
1 point light source 1a diffused light source 1b pinhole 1c pinhole forming plate 1d pinhole forming device 1f pinhole 2,4,6,7 spherical convex lens 3 liquid crystal display E eyeball

Claims (6)

An optical system configured to irradiate a liquid crystal display from a plurality of point light sources and form an optical system such that transmitted light forms converging points at a plurality of positions at predetermined intervals within a movable range of a pupil, wherein a wide-view retinal projection type is provided. Display system. 2. The wide-view retinal projection display system according to claim 1, wherein the point light source comprises a diffuse light source and a plurality of pinholes illuminated by the diffuse light source. The liquid crystal display is illuminated through a movable pinhole illuminated by a diffused light source, and an optical system is configured so that light passing through the movable pinhole forms convergence points at a plurality of positions at predetermined intervals within a movable range of a pupil. Wherein the movable pinhole is position-controlled to converge a light beam to a moving pupil position based on a position detection signal from a pupil position detection device that detects pupil movement. Retina projection display system. The transmitted light from the liquid crystal display is converged by an optical lens to form convergence points at a plurality of positions, and a plurality of pinholes are arranged at the convergence point positions, and light passing through the pinholes falls within a movable range of a pupil. The wide-view retinal projection display system according to any one of claims 1 to 3, wherein the convergence is achieved. A liquid crystal display is irradiated from a diffused light source, the transmitted light is converged by an optical lens, a plurality of pinholes are arranged at the focal position, and a plurality of light beams emitted from the pinholes are set within a movable range of a pupil. A wide-view retinal projection display system, wherein an optical system is configured to form convergence points at a plurality of positions at intervals. The wide-view retinal projection display system according to any one of claims 1 to 5, further comprising a CCD camera, and displaying image data from the CCD camera on a liquid crystal display.

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