WO2012150703A1 - Système d'affichage vidéo, dispositif d'affichage de projection, écran à réflexion directionnelle, et dispositif d'affichage à couche - Google Patents

Système d'affichage vidéo, dispositif d'affichage de projection, écran à réflexion directionnelle, et dispositif d'affichage à couche Download PDF

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Publication number
WO2012150703A1
WO2012150703A1 PCT/JP2012/061518 JP2012061518W WO2012150703A1 WO 2012150703 A1 WO2012150703 A1 WO 2012150703A1 JP 2012061518 W JP2012061518 W JP 2012061518W WO 2012150703 A1 WO2012150703 A1 WO 2012150703A1
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WO
WIPO (PCT)
Prior art keywords
screen
projection
recursive
image
video
Prior art date
Application number
PCT/JP2012/061518
Other languages
English (en)
Japanese (ja)
Inventor
柴田　諭
時由 梅田
豪 鎌田
誠二 大橋
昌洋 ▲辻▼本
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from JP2011103102A external-priority patent/JP2014139591A/ja
Priority claimed from JP2011103103A external-priority patent/JP2014139592A/ja
Priority claimed from JP2011107495A external-priority patent/JP2014139594A/ja
Priority claimed from JP2011169309A external-priority patent/JP2014139596A/ja
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012150703A1 publication Critical patent/WO2012150703A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/305—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using lenticular lenses, e.g. arrangements of cylindrical lenses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/363—Image reproducers using image projection screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/366—Image reproducers using viewer tracking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/366—Image reproducers using viewer tracking
    • H04N13/373—Image reproducers using viewer tracking for tracking forward-backward translational head movements, i.e. longitudinal movements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/366—Image reproducers using viewer tracking
    • H04N13/376—Image reproducers using viewer tracking for tracking left-right translational head movements, i.e. lateral movements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N2013/40—Privacy aspects, i.e. devices showing different images to different viewers, the images not being viewpoints of the same scene
    • H04N2013/403—Privacy aspects, i.e. devices showing different images to different viewers, the images not being viewpoints of the same scene the images being monoscopic

Definitions

  • the present invention relates to a video display system, a projection display device, a directional reflective screen, and a layer display device.
  • This application includes Japanese Patent Application No. 2011-107495 filed in Japan on May 12, 2011, Japanese Patent Application No. 2011-103102 filed in Japan on May 2, 2011, and May 2, 2011. Claiming priority based on Japanese Patent Application No. 2011-103103 filed in Japan and Japanese Patent Application No. 2011-169309 filed in Japan on August 2, 2011, the contents of which are incorporated herein by reference. To do.
  • an image display device that combines image projection means such as a projector and a directional reflective screen having directivity
  • image projection means such as a projector and a directional reflective screen having directivity
  • an image signal irradiated on the directional reflective screen is reflected in the horizontal direction when reflected by the directional reflective screen. Condensed at the position of the image projection means. Taking advantage of such reflection characteristics, two projectors are placed directly above or below the right and left eyes of the observer, and a pair of video signals that are stereoscopic image signals based on the principle of binocular parallax are converted into directivity. By irradiating the reflective screen, a stereoscopic image can be viewed without wearing special glasses.
  • An image display device that extends the viewing range in the horizontal direction of the directional reflection screen includes a directional reflection screen and image projection means for projecting an image onto the directional reflection screen.
  • An anisotropic diffuser, and the mirror mirror group and the anisotropic diffuser diffuse anisotropically after incident light from the image projection means is transmitted through the anisotropic diffuser and reflected by the mirror mirror group.
  • the anisotropic diffuser is known to have a microlens group that has a width in a direction parallel to the ridgeline of the mirror group and a width in a direction perpendicular to the ridgeline of the mirror group. (For example, refer to Patent Document 1).
  • a projection display device that includes a recursive screen that reflects light in the same direction as the direction in which light is incident, and a projector that projects an image on the recursive screen.
  • the projector is disposed in the vicinity of the eyes of the viewer (viewer) who views the video. Further, the light emitted from the projector to the recursive screen returns to the direction of the projector. Therefore, this projection type display device has extremely high light utilization efficiency, and even when a low output projector is used, a high brightness image can be obtained.
  • each image (light) is directed in the direction of each projector. Since the viewer returns, each viewer can see a different video.
  • individual projectors are arranged in the vicinity of the viewer's eyes, and images corresponding to the respective eyes are projected from the respective projectors to the recursive screen. It is also known that 3D video can be realized (see, for example, Patent Document 2).
  • a projection display device that includes a recursive screen that reflects light in the same direction as the direction in which light is incident, and a projector that projects an image on the recursive screen.
  • the projector is disposed in the vicinity of the eyes of the viewer (viewer) who views the video. Further, the light emitted from the projector to the recursive screen returns to the direction of the projector. Therefore, this projection type display device has extremely high light utilization efficiency, and even when a low output projector is used, a high brightness image can be obtained.
  • a directional scattering screen is arranged near the projection surface of the recursive screen, and the image of the recursive screen is greatly enlarged in the left-right direction (the width direction of the recursive screen), and the vertical direction (the vertical direction of the recursive screen). It is also known to enlarge in a small direction (for example, see Patent Document 3).
  • an image display device that combines an image projection unit such as a projector and a retroreflective screen (hereinafter referred to as a directional reflection screen) that reflects image light emitted from the image projection unit with directivity.
  • a directional reflection screen a retroreflective screen
  • the image signal irradiated on the directional reflection screen is condensed at the position of the image projection means in the horizontal direction when reflected by the directional reflection screen.
  • two projectors are arranged directly above or below the right and left eyes of the observer, and a pair of video signals that are stereoscopic image signals based on the principle of binocular parallax are converted into directivity.
  • a stereoscopic image can be viewed without wearing special glasses.
  • a group of mirrors arranged with mirrors crossing at a predetermined angle and an anisotropic diffuser are provided.
  • Combined directional reflective screens are also known.
  • Such a directional reflection screen is arranged so that incident light from the image projection means is transmitted through the anisotropic diffuser, reflected by the mirror group, and then transmitted through the anisotropic diffuser.
  • An anisotropic diffuser is known that includes a group of minute lenses having a width in a direction parallel to a ridge line of a group of mirrors and a width in a direction perpendicular to the ridge line.
  • an image display device is also known in which different images are projected from a plurality of image projection means onto one directional reflective screen, and the images that can be observed differ depending on the position of the observer (for example, patents).
  • 69A and 69B are schematic diagrams briefly showing the mechanism of the above-described image display apparatus.
  • the image display device 4200 includes a directional reflection screen 4201 and projectors 4202a, 4202b, and 4202c arranged in the vicinity of the plurality of viewers 400A, 400B, and 400C. Then, the image light A11 projected from the projector 4202a is reflected toward the observer 400C by the directional reflection screen 4201 (see the solid line arrow Ic in the figure).
  • the viewer 400C can observe the image projected by the projector 4202a as the regular reflection light A12 of the projector 4202a.
  • the image light B11 projected from the projector 4202b is perpendicularly incident on the directional reflection screen 4201 and reflected toward the observer 400B (see the solid arrow Ib in the figure).
  • the image light C11 projected from the projector 4202c is reflected by the directional reflection screen 4201 toward the observer 400A (see the solid line arrow Ia in the figure).
  • the image display apparatus described in the first background art can widen the diffusion range of the image (reflected light) over the entire screen of the directional reflection screen, but at any position on the screen of the directional reflection screen.
  • the diffusion range of the image could not be controlled.
  • the projection display device described in the second background art when the viewer's eyes are displaced along a plane parallel to the projection surface of the recursive screen, the brightness of the entire screen (video) is lowered. There was a problem that it was difficult to see the video.
  • the distance between the projection screen of the recursive screen and the viewer's eyes is deviated, that is, when the position of the viewer's eyes approaches the optimal position relative to the projection surface of the recursive screen, or When moving away, there was a problem that the brightness of the image was uneven. Specifically, when the viewer's eye position approaches or moves away from the optimal position with respect to the projection surface of the recursive screen, the center portion of the video is bright and the peripheral portion is dark. There was a problem of showing a luminance distribution.
  • the projection display device described in the third background art when the 3D image is realized by using the feature of the recursive screen, the image that should originally return to the viewer's left and right eyes respectively. There was a problem that the crosstalk was worsened because the eye returned to the other side. Further, when the position of the viewer's eyes is shifted along a plane parallel to the projection surface of the recursive screen, there is a problem that the brightness of the entire screen (video) is lowered and the video is difficult to see.
  • the distance between the projection screen of the recursive screen and the viewer's eyes is deviated, that is, when the position of the viewer's eyes approaches the optimal position relative to the projection surface of the recursive screen, or When moving away, there is a problem that the brightness of the image becomes uneven. Specifically, when the viewer's eye position approaches or moves away from the optimal position with respect to the projection surface of the recursive screen, the center of the video is along the width direction of the recursive screen. There is a problem that it shows a luminance distribution that is bright in a strip shape and dark at the periphery.
  • a part of the image light emitted from the image projection unit and incident on the directional reflection screen reaches the mirror group. Without being reflected on the surface of the anisotropic diffuser.
  • part of the image light emitted from the image projection unit for the left eye may be reflected by the surface of the diffusing lens and return to the direction of the image projection unit for the right eye.
  • part of the image light emitted from the image projection means is easily reflected on the surface of the anisotropic diffuser due to a large refractive index difference between the air layer and the anisotropic diffuser.
  • the video for the right eye and the video for the left eye are mixed, and there is a problem that the quality of the image is deteriorated due to crosstalk.
  • part of the image light projected from the projector 4202a is specularly reflected (specular reflection) on the surface of the directional reflection screen 4201.
  • the image light projected from the projector 4202a may be seen by the observer 4000C (see the dotted arrow Ea in the figure).
  • the observer 4000C receives the image light projected from the projector 4202c to be originally observed (see the solid arrow Ic in the figure) and the image light projected from the projector 4202a that cannot be originally observed (see the dotted arrow Ea in the figure). I see an image with a mixture of (crosstalk).
  • the image projected from the projector 4202c to be observed by the observer 4000C is greatly deteriorated.
  • the image light projected from the projector 4202a to be originally observed (see the solid arrow Ia in the figure) and the projector 4202c are projected to the observer 4000A, and a part thereof is specularly reflected by the directional reflection screen 4201. In some cases, an image in which the image light (see the dotted arrow Ec in the figure) mixed is seen.
  • FIG. 69B since the projector 4202a and the projector 4202c are installed at the same height, the axes of the emitted light are actually overlapped, but they are shifted in the vertical direction for easy understanding. ing.
  • the present invention has been made in view of the first background art, and provides a video display system capable of controlling the diffusion range of an image at an arbitrary position on the screen of a retroreflective screen. Objective.
  • the present invention has been made in view of the second background art, and an object thereof is to provide a projection type display device that can observe an image with little luminance unevenness.
  • the present invention has been made in view of the third background art, and an object thereof is to provide a projection type display device that can observe an image with little luminance unevenness.
  • the present invention has been made in view of the fourth background art, and an image display including a screen capable of projecting a clear image while maintaining desired light reflection performance and diffusion performance.
  • An object is to provide an apparatus.
  • a first aspect of the present invention includes a retroreflective screen and a plurality of projectors that project an image on the retroreflective screen, and the projector is positioned at an eye position of an observer of the image.
  • the image display system is provided at a position spaced apart in either the vertical direction, and a diffusion control body that diffuses light in the vertical direction is laminated on the projection surface of the retroreflective screen.
  • the diffusion controller may be capable of forming regions having partially different refractive indexes.
  • the diffusion control body may be a liquid lens.
  • the diffusion control body may be a liquid crystal lens.
  • the diffusion controller may be a polymer dispersed liquid crystal element.
  • the retroreflective screen may have three reflective surfaces.
  • the retroreflective screen may include a group of mirrors.
  • a recursive screen, a projection video processing unit that processes a video signal projected on the recursive screen, and a video from the projection video processing unit are projected onto the recursive screen.
  • a correction mechanism that corrects the luminance distribution of the image projected from the projector onto the recursive screen when the distance from the projection screen to the projection surface is longer than the optimum position.
  • a directional scattering screen is disposed in the vicinity of the projection surface of the recursive screen, and the reflected light of the recursive screen is reflected by the directional scattering screen.
  • the angle of diffusion may be different between the width direction and the vertical direction of the screen.
  • the luminance distribution may be concentric.
  • the luminance distribution may be darkest at the center and gradually brighter toward the peripheral edge.
  • the luminance distribution is a projection of the recursive screen, wherein a straight line connecting the eye of the viewer of the video and the projection unit is extended to the recursive screen side. It is good also considering the point which cross
  • the correction mechanism may be the projection video processing unit, and the projection video processing unit may process the video signal to correct the luminance distribution.
  • the correction mechanism is a correction filter provided between the projection unit and the recursive screen, and the luminance distribution is corrected by the correction filter. good.
  • position detecting means for detecting the position of the projection unit and / or the position of the viewer's eyes.
  • a chair having position detecting means for detecting the position of the projection unit and / or the position of the viewer's eyes may be provided.
  • a recursive screen, a projection video processing unit that processes a signal of a video projected on the recursive screen, and a video from the projection video processing unit are projected onto the recursive screen.
  • a directional scattering screen is disposed in the vicinity of the projection surface of the recursive screen, and the reflected light from the recursive screen is reflected by the directional scattering screen.
  • the angle of diffusion may be different between the width direction and the vertical direction of the screen.
  • the plurality of projectors project an image on the recursive screen so that an enlargement ratio of the image increases sequentially from those arranged on the recursive screen side. Also good.
  • the plurality of projectors may display images on the recursive screen so that the sizes of the images projected from the projectors are equal on the projection surface of the recursive screen. May be projected.
  • a correction mechanism for correcting the luminance distribution of images projected from the plurality of projectors onto the recursive screen is provided, and the correction mechanism causes the luminance distribution to be centered. You may correct
  • the correction mechanism may be the projection video processing unit, and the projection video processing unit may process the video signal to correct the luminance distribution.
  • the correction mechanism is a correction filter provided between the projection unit and the recursive screen, and the luminance distribution is corrected by the correction filter. good.
  • position detection means for detecting the position of the eyes of the viewer of the video may be provided.
  • the plurality of projectors are arranged in parallel in a direction orthogonal to the larger diffusion angle of the reflected light in the width direction or the reflected light in the vertical direction of the recursive screen. May be.
  • the angle at which the reflected light of the recursive screen diffuses is such that the vertical direction of the recursive screen is larger than the width direction of the recursive screen, and the plurality of projectors are You may arrange
  • the plurality of projectors may be installed above or below the viewer's head.
  • a horizontal reflection unit that collects incident light along at least the horizontal direction and reflects the incident light toward the incident direction, and a vertical that diffuses the horizontal reflected light along the vertical direction.
  • the horizontal reflection part and the vertical diffusion part are spread so as to overlap and overlap each other, and the surface of the vertical diffusion part has the incident light directed toward the horizontal reflection part. It is a directional reflective screen in which an antireflection body for preventing surface reflection is formed.
  • the antireflection body may have a fine concavo-convex structure and a large number of fine conical protrusions may be arranged.
  • the antireflection body may have a refractive index smaller than that of the vertical diffusion portion.
  • the antireflection body may be formed in a sheet shape and attached to the surface of the vertical diffusion portion.
  • a planarization layer may be further formed between the antireflection body and the surface of the vertical diffusion portion.
  • the planarizing layer may have a refractive index smaller than that of the vertical diffusion portion and larger than that of the antireflection body.
  • the horizontal reflecting portion may be formed by arranging a plurality of sets of two reflecting surfaces intersecting each other at a predetermined angle and reflecting the incident light on two surfaces.
  • the vertical diffusing unit may comprise a lens group in which a plurality of lenses are arranged.
  • the fifth aspect of the present invention includes a three-dimensional reflection unit that reflects incident light in the horizontal direction and the vertical direction in the incident direction, and the surface of the three-dimensional reflection unit includes the three-dimensional reflection unit. It is a directional reflective screen in which an antireflection body for preventing surface reflection of the incident light traveling toward the reflection portion is formed.
  • the stereoscopic reflecting portion may be composed of a prism sheet in which a plurality of cubic prisms that reflect the incident light in three planes are arranged.
  • a reflective film may be further formed on the front surface or the back surface of the horizontal reflection portion or the three-dimensional reflection portion.
  • the antireflection body may be formed by laminating a plurality of optical interference layers.
  • the antireflection body may be transparent.
  • a horizontal reflecting unit that collects incident light at least along the horizontal direction and reflects the incident light toward the incident direction, and a vertical that diffuses the horizontal reflected light along the vertical direction.
  • the horizontal reflection part and the vertical diffusion part are spread so as to overlap and overlap each other, and the surface of the vertical diffusion part has the incident light directed toward the horizontal reflection part.
  • An image display apparatus comprising: a directional reflection screen on which an antireflection body for preventing surface reflection is formed; and image projection means for projecting an image as incident light incident on the directional reflection screen.
  • the seventh aspect of the present invention includes a three-dimensional reflection part that reflects incident light in the horizontal direction and the vertical direction in the incident direction, and the surface of the three-dimensional reflection part includes the three-dimensional reflection part.
  • An image display device provided.
  • the diffusion range of an image can be controlled at an arbitrary position on the screen of the retroreflective screen.
  • the position before and after the projection unit of the projector arranged at an optimal position with respect to the projection surface of the recursive screen, the recursive screen, the projection unit of the projector Even at a position shifted in the vertical direction or the horizontal direction with respect to a straight line connecting the images, an image with little luminance unevenness can be observed.
  • the position before and after the projection unit of the projector arranged at an optimal position with respect to the projection surface of the recursive screen, the recursive screen, the projection unit of the projector Even at a position shifted in the vertical direction or the horizontal direction with respect to a straight line connecting the images, an image with little luminance unevenness can be observed.
  • 1 is a plan view of a schematic configuration showing an embodiment of a video display system.
  • 1 is a side view of a schematic configuration showing an embodiment of a video display system.
  • It is a schematic perspective view which shows an example of a retroreflection screen.
  • It is a schematic perspective view which shows the other example of a retroreflection screen.
  • It is a schematic sectional drawing which shows an example of a liquid lens.
  • It is a schematic sectional drawing which shows an example of a liquid crystal lens.
  • It is a schematic sectional drawing which shows another example of a liquid crystal lens.
  • It is a schematic sectional drawing which shows the other example of a liquid crystal lens.
  • It is a schematic sectional drawing which shows the other example of a liquid crystal lens.
  • a directional scattering screen When a directional scattering screen is used, it is a 1st figure which shows the luminance distribution of the image
  • FIG. 15 It is a top view of schematic structure which shows a part of projection type display apparatus of 14th Embodiment. It is a top view of schematic structure which shows the projection type display apparatus of 15th Embodiment. It is a side view of schematic structure which shows the projection type display apparatus of 15th Embodiment. It is a 1st figure which shows the luminance distribution of the image
  • a directional scattering screen When a directional scattering screen is used, it is a 3rd figure which shows the luminance distribution of the image
  • FIGS. 1A and 1B are schematic configuration diagrams showing an embodiment of a video display system, FIG. 1A is a plan view, and FIG. 1B is a side view.
  • the video display system 1010 of this embodiment includes a retroreflective screen 1011, three projectors 1012, 1013, and 1014 that project an image on the retroreflective screen 1011, a half mirror 1015 corresponding to the projector 1012, and a retroreflective screen.
  • a diffusion control body 1016 stacked on the projection surface 1011a of the screen 1011 is schematically configured.
  • the projector 1012 is installed in front of the retroreflective screen 1011, is in front of the retroreflective screen 1011, and is positioned with respect to the position of the eyes of the observer 1021 who views the image projected on the retroreflective screen 1011. It is installed at a position spaced downward, that is, in the vicinity of the feet of the observer 1021.
  • the projector 1012 is installed with its projection unit 1012a facing upward in the vertical direction.
  • the half mirror 1015 is installed in the vicinity of the observer 1021 and in front.
  • the half mirror 1015 is installed such that one surface (reflection surface) 1015a is inclined toward the retroreflection screen 1011.
  • the image emitted from the projector 1012 is reflected by one surface 1015a of the half mirror 1015, and the reflected light (image) is projected onto the projection surface 1011a of the retroreflective screen 1011.
  • the image (light) projected on the retroreflective screen 1011 is reflected by the retroreflective screen 1011, and the reflected light is diffused in the vertical direction (vertical direction) of the projection surface 1011 a by the diffusion controller 1016 for observation. Focused on the eyes of the person 1021.
  • the projector 1013 is installed obliquely with respect to the retroreflective screen 1011, is in an oblique position with respect to the retroreflective screen 1011, and the eyes of the observer 1022 who views the image projected on the retroreflective screen 1011. It is installed at a position spaced upward from the position, that is, above the observer 1022. Note that the projector 1013 is installed obliquely with respect to the retroreflective screen 1011 that the projector 1013 is lateral to a line connecting the projector 1012 and the projection surface 1011a of the retroreflective screen 1011 (in FIG. It is installed at a position shifted to the right side of 1012.
  • An image emitted from the projector 1013 is projected onto the projection surface 1011 a of the retroreflective screen 1011. Then, the image (light) projected on the retroreflective screen 1011 is reflected by the retroreflective screen 1011, and the reflected light is diffused in the vertical direction (vertical direction) of the projection surface 1011 a by the diffusion control body 1016 for observation. The light is condensed on the eyes of the person 1022.
  • the projector 1014 is installed obliquely with respect to the retroreflective screen 1011, is in an oblique position with respect to the retroreflective screen 1011, and the eyes of the observer 1023 viewing the image projected on the retroreflective screen 1011. It is installed at a position spaced upward from the position, that is, above the observer 1023. Note that the projector 1014 is installed obliquely with respect to the retroreflective screen 1011 that the projector 1014 is located laterally from a straight line connecting the projector 1012 and the projection surface 1011a of the retroreflective screen 1011 (in FIG. It is installed at a position shifted to the left) with respect to 1012.
  • An image emitted from the projector 1013 is projected onto the projection surface 1011 a of the retroreflective screen 1011. Then, the image (light) projected on the retroreflective screen 1011 is reflected by the retroreflective screen 1011, and the reflected light is diffused in the vertical direction (vertical direction) of the projection surface 1011 a by the diffusion control body 1016 for observation. The light is condensed on the eyes of the person 1023.
  • the retroreflective screen 1011 examples include those having a group of mirrors and those having three reflective surfaces.
  • a retroreflective screen 1011 a screen having a group of mirrors, for example, as shown in FIG. 2, a projection surface 1011 a is continuous with a plane (reflective surface) sandwiched between ridge lines 1011 b and valley lines 1011 c that are parallel to each other. It has an uneven surface. That is, the projection surface 1011a of the retroreflective screen 1011 has a shape in which one of the planes (reflecting surfaces) is a mirror, and the mirror is continuously combined with the ridge line 1011b and the valley line 1011c as a boundary. . Further, the included angle of the mating mirror, that is, the angle between two adjacent flat surfaces (reflecting surfaces) forming one valley is not particularly limited, but is preferably near 90 °.
  • Examples of the retroreflective screen 1011 having three reflective surfaces include those having a trihedral corner cube 1030 made of a mirror surface of a vertical right triangle as shown in FIG.
  • the incident light 1041 is sequentially reflected by the three reflecting surfaces 1030a, 1030b, and 1030c, and returns to the light source direction.
  • the ridge line 1011b is installed so as to extend in the vertical direction (vertical direction) of the projection plane 1011a, the recursive property does not appear in the vertical direction.
  • the trihedral corner cube 1030 since all the XYZ directions of the incident light 1041 are inverted, the reciprocity is exhibited in both the vertical and horizontal directions, so that the efficiency is higher.
  • the diffusion control body 1016 is not particularly limited as long as it is a structure capable of controlling the light diffusion direction (diffusibility).
  • a liquid lens as shown in FIG. 4 as shown in FIG. 5A to FIG.
  • a liquid lens 1050 shown in FIG. 4 is roughly composed of a cell 1051, an electrode 1052 provided therein, and oil 1054 and water 1055 enclosed in a recess 1053 formed at the center of the cell 1051 by the electrode 1052. It is configured.
  • the liquid lens 1050 has a function of changing the refraction direction of light by changing the shape of the interface between the oil 1054 and the water 1055 according to the voltage applied to the electrode 1052, and changing the traveling direction of the light after transmission. is doing.
  • the liquid lens 1050 is laminated on the projection surface 1011 a of the retroreflective screen 1011.
  • the light diffused by the diffusion controller 1016 passes through the liquid lens 1050 from the water 1055 side.
  • the liquid lens 1050 controls the diffusibility of light diffused by the diffusion controller 1016 by changing the light refraction direction.
  • a liquid crystal lens 1060 shown in FIGS. 5A and 5B includes a cell 1061, a pair of electrodes 1062 and 1063 provided to face the cell 1061, a prism structure 1064 provided in the cell 1061, and a pair of electrodes.
  • a liquid crystal 1065 sealed between the electrodes 1062 and 1063 is schematically configured.
  • An electrode 1063 is provided on the surface of the prism structure 1064 facing the electrode 1062.
  • the liquid crystal lens 1060 changes the alignment state of the liquid crystal 1065 and changes the refractive index of the liquid crystal 1065 according to the voltage applied to the pair of electrodes 1062 and 1063, thereby changing the refractive index of the liquid crystal 1065.
  • the liquid crystal lens 1060 has a function of changing the direction of refraction when passing through the prism structure 1064 and changing the traveling direction of the light after transmission.
  • the liquid crystal lens 1060 is laminated on the projection surface 1011 a of the retroreflective screen 1011.
  • the light diffused by the diffusion controller 1016 passes through the liquid crystal lens 1060 from the electrode 1062 side.
  • the liquid crystal lens 1060 controls the diffusibility of the light diffused by the diffusion controller 1016 by changing the light refraction direction.
  • a liquid crystal lens 1070 shown in FIG. 6 includes a cell 1073 having a pair of substrates 1071 and 1072 facing each other at a predetermined interval, a pair of electrodes 1074 and 1075 provided on the facing surfaces of the substrates 1071 and 1072, respectively.
  • a liquid crystal 1076 sealed between a pair of electrodes 1074 and 1075 is schematically configured.
  • the electrode 1075 includes a plurality of annular electrode elements 1075a, 1075b, 1075c, 1075d, and 1075e arranged concentrically.
  • the liquid crystal lens 1070 applies a constant voltage to one electrode 1074 and applies different voltages to the electrode elements 1075a, 1075b, 1075c, 1075d, and 1075e of the other electrode 1075.
  • a phase profile that follows is generated, and has a function of causing lens action.
  • the liquid crystal lens 1070 is laminated on the projection surface 1011 a of the retroreflection screen 1011.
  • the light diffused by the diffusion controller 1016 passes through the liquid crystal lens 1070 from the electrode 1075 side.
  • the liquid crystal lens 1070 controls the diffusibility of the light diffused by the diffusion controller 1016 by changing the light refraction direction.
  • a liquid crystal lens 1080 shown in FIG. 7 includes a cell 1083 having a pair of electrode-attached substrates 1081 and 1082 facing each other at a predetermined interval, and within the cell 1083, one electrode-attached substrate 1081 and the other electrode-attached substrate 1082. It is schematically composed of a Fresnel lens 1084 provided on the opposite surface and a liquid crystal 1085 sealed between a pair of substrates 1081 and 1082 with electrodes.
  • the liquid crystal lens 1080 changes the alignment state of the liquid crystal 1085 and changes the refractive index of the liquid crystal 1085 in accordance with the voltage applied to the pair of electrode substrates 1081 and 1082, thereby allowing light to pass through the Fresnel lens 1084.
  • the liquid crystal lens 1080 is laminated on the projection surface 1011 a of the retroreflective screen 1011.
  • the light diffused by the diffusion controller 1016 passes through the liquid crystal lens 1080 from the electrode-attached substrate 1081 side.
  • the liquid crystal lens 1080 controls the diffusibility of light diffused by the diffusion controller 1016 by changing the light refraction direction.
  • the liquid crystal lens 1090 shown in FIG. 8 is provided on a surface facing the substrate 1091 with an electrode of the substrate 1092 in the cell 1093 having a substrate 1091 and a substrate 1092 facing each other at a predetermined interval.
  • the lens 1094 having a substantially semicircular cross section, an electrode film 1095 provided on the surface of the lens 1094 facing the substrate with electrode 1091, and a liquid crystal 1096 sealed between the substrate with electrode 1091 and the substrate 1092 are schematically shown. It is configured.
  • the liquid crystal lens 1090 changes the alignment state of the liquid crystal 1096 and changes the refractive index of the liquid crystal 1096 in accordance with the voltage applied to the electrode substrate 1091 and the electrode film 1095, so that light passes through the lens 1094.
  • the liquid crystal lens 1090 is laminated on the projection surface 1011 a of the retroreflection screen 1011.
  • the light diffused by the diffusion controller 1016 passes through the liquid crystal lens 1090 from the substrate 1092 side.
  • the liquid crystal lens 1090 controls the diffusibility of the light diffused by the diffusion controller 1016 by changing the light refraction direction.
  • a polymer dispersed liquid crystal element 1100 shown in FIGS. 9A and 9B is a composite film in which liquid crystal molecules 1101 and a polymer material (polymer material) 1102 are arranged in a network.
  • the polymer dispersed liquid crystal element 1100 is an optical element that can be switched between a non-scattering state when an electric field is applied and a scattering state when no voltage is applied. That is, since the liquid crystal molecules 1101 respond to an electric field, it is possible to switch between a scattering state and a non-scattering state.
  • the refractive index is uniform (electric field application state)
  • the polymer dispersed liquid crystal element 1100 is in a non-scattering state.
  • the refractive index is randomly dispersed (no voltage applied state)
  • it is in a scattering state.
  • FIG. 9A in a voltage non-application state (scattering state), for example, incident light 1111 from the projector 1012 shown in FIGS. 1A and 1B is scattered by the polymer dispersed liquid crystal element 1100. At this time, a part of the light 1111 is once irradiated to the mirror surface 1011b of the retroreflective screen 1011 and retroreflected by forward scattering.
  • a voltage non-application state for example, incident light 1111 from the projector 1012 shown in FIGS. 1A and 1B is scattered by the polymer dispersed liquid crystal element 1100.
  • a part of the light 1111 is once irradiated to the mirror surface 1011b of the retroreflective screen 1011 and retroreflected by forward scattering.
  • the reflected light 1112 is once scattered by the polymer dispersed liquid crystal element 1100 and converted into a different orientation from the original incident light 1111, the reflected light is condensed at the lens (projection unit) position of the projector 1012. None. Therefore, the reflected light 1112 returns while being diffused over a wide range. As a result, the observer can view the video even at a position other than the vicinity of the lens (projection unit). That is, the viewers 1021, 1022, and 1023 shown in FIGS. 1A and 1B can all watch the same video.
  • the polymer dispersed liquid crystal element 1100 is in a non-scattering state (transparent state) in an electric field applied state.
  • incident light 1111 from the projector 1012 shown in FIGS. It is not scattered by the polymer dispersed liquid crystal element 1100. Therefore, the reflected light 1112 of the incident light (image) 1111 irradiated on the mirror surface 1011b of the retroreflective screen 1011 is collected at the lens (projection unit) position of the projector 1012. That is, the video from the projector 1012 can be viewed only at the position of the observer 1021 shown in FIGS. 1A and 1B.
  • the polymer dispersed liquid crystal element 1120 shown in FIGS. 10A and 10B is a composite film in which liquid crystal molecules 1121 and a polymer material (polymer material) 1122 are arranged in a network.
  • the polymer dispersed liquid crystal element 1120 is an optical element that can be switched between a scattering state when an electric field is applied and a non-scattering state when no voltage is applied. That is, since the liquid crystal molecules 1121 respond to an electric field, it is possible to switch between a scattering state and a non-scattering state, and the polymer dispersion type liquid crystal element 1120 is in a non-scattering state when the refractive indexes are uniform (no voltage applied state). When the refractive index is randomly dispersed (electric field application state), a scattering state is obtained.
  • the polymer dispersion type liquid crystal element 1120 when no voltage is applied, the polymer dispersed liquid crystal element 1120 is in a non-scattering state (transparent state).
  • incident light 1131 from the projector 1012 shown in FIGS. It is not scattered by the molecular dispersion type liquid crystal element 1120. Therefore, the reflected light 1132 of the incident light (image) 1131 irradiated on the mirror surface 1011b of the retroreflective screen 1011 is condensed at the lens (projection unit) position of the projector 1012.
  • the video from the projector 1012 can be viewed only at the position of the observer 1021 shown in FIGS. 1A and 1B.
  • incident light 1131 from the projector 1012 shown in FIGS. 1A and 1B is scattered by the polymer dispersed liquid crystal element 1120.
  • a part of the light 1131 is once irradiated on the mirror surface 1011b of the retroreflective screen 1011 and retroreflected by forward scattering.
  • the reflected light 1132 is once scattered by the polymer-dispersed liquid crystal element 1120 and converted into a different orientation from the original incident light 1131, and thus is condensed at the lens (projection unit) position of the projector 1012. None. Therefore, the reflected light 1132 returns while being diffused over a wide range. As a result, the observer can view the video even at a position other than the vicinity of the lens (projection unit). That is, the viewers 1021, 1022, and 1023 shown in FIGS. 1A and 1B can all watch the same video.
  • the refractive index of the diffusion control body 1016 (liquid lens 1050, liquid crystal lenses 1060, 1070, 1080, and 1090, polymer dispersion type liquid crystal elements 1100 and 1120) stacked on the projection surface 1011a of the retroreflective screen 1011.
  • the diffusion control body 1016 makes the diffusibility of the upper region and the lower region different in the vertical direction.
  • the refractive index of the diffusion control body 1016 is partially changed to diffuse light to a position corresponding to a part of the lower region of the projection surface 1011a of the retroreflective screen 1011.
  • a region (non-diffusion region) 1011B that is not to be formed is formed.
  • the diffusion control body 1016 is formed with a region (diffusion region) 1011A and a non-diffusion region 1011B for diffusing light.
  • the observer 1021 is projected to the diffusion region 1011A, the diffusion controller 1016, a video alpha 1 diffused in the longitudinal direction of the projection plane 1011a of the retro-reflective screen 1011 (vertical direction), the non-diffusion region 1011B
  • the projected image ⁇ 1 can be seen.
  • the image ⁇ 1 projected on the non-diffusing region 1011B is condensed at the position of the projector 1012 without being diffused in the vertical direction (vertical direction) of the projection surface 1011a of the retroreflective screen 1011. Therefore, the image beta 1 projected in the non-diffusion region 1011B can only observer 1021 who is in front of the retro-reflective screen 1011 is seen. That is, the observer 1022 who is oblique position with respect to the retroreflective screen 1011 can not see the video beta 1 projected in the non-diffusion region 1011 B.
  • the projector 1013 is projected to the diffusion region 1011A, it is possible to see the longitudinal image gamma 1 diffused in the (vertical direction) of the projection plane 1011a of the retro-reflective screen 1011 by diffusion controller 1016.
  • the observer 1023 views the image ⁇ 1 projected from the projector 1014 onto the diffusion region 1011A and diffused by the diffusion control body 1016 in the vertical direction (vertical direction) of the projection surface 1011a of the retroreflective screen 1011. Can do.
  • the diffusion range of the image in the diffusion control body 1016 can be arbitrarily set corresponding to an arbitrary position of the projection surface 1011a of the retroreflective screen 1011. Therefore, the diffusion range of the image can be controlled at an arbitrary position on the projection surface 1011a of the retroreflective screen 1011.
  • the diffusion range of the image in the diffusion control body can be arbitrarily set corresponding to an arbitrary position on the projection surface of the retroreflective screen.
  • a diffusion control body 1016 (liquid lens 1050, liquid crystal lenses 1060, 1070, 1080, 1090, polymer dispersion type liquid crystal element laminated on the projection surface 1011a of the retroreflective screen 1011 is used. 1100, 1120) by forming regions having different refractive indexes, the diffusion control body 1016 makes the diffusivity of the rectangular region formed so as to be unevenly distributed on one side of the four corners different from that of the other regions. .
  • the refractive index of the diffusion control body 1016 is partially changed so that light is not diffused at positions corresponding to the upper right corners of the projection surface 1011a of the retroreflective screen 1011.
  • a diffusion region 1011D is formed. Thereby, in the diffusion control body 1016, a diffusion region 1011C for diffusing light and a non-diffusion region 1011D are formed.
  • the projector 1012 with projecting the primary image alpha 2 diffusion region 1011C, projecting an image beta 2 for three-dimensional (3D) in the non-diffusion region 1011d.
  • the observer 1021 is projected to the diffusion region 1011C, the diffusion controller 1016, a video alpha 2 diffused in the longitudinal direction of the projection plane 1011a of the retro-reflective screen 1011 (vertical direction), the non-diffusion region 1011D
  • the projected image ⁇ 2 can be seen.
  • a projector 1012 by using one for the right eye of the observer 1021 and the one for the left eye can only observer 1021 sees the image beta 2 which is three-dimensional.
  • the image ⁇ 2 projected on the non-diffusing region 1011D is not diffused in the vertical direction (vertical direction) of the projection surface 1011a of the retroreflective screen 1011, it is condensed at the position of the projector 1012. Therefore, the image beta 2 projected on the non-diffusion region 1011D can only observer 1021 who is in front of the retro-reflective screen 1011 is seen. That is, the observer 1022 who is oblique position with respect to the retroreflective screen 1011 can not see the video beta 2 projected on the non-diffusion region 1011 B.
  • the projector 1013 is projected to the diffusion region 1011C
  • the diffusion controller 1016 can be seen in the vertical direction (vertical direction) is diffused to the video gamma 2 in projection surface 1011a of the retro-reflective screen 1011 .
  • the observer 1023 views the image ⁇ 2 projected from the projector 1014 onto the diffusion region 1011C and diffused by the diffusion control body 1016 in the vertical direction (vertical direction) of the projection surface 1011a of the retroreflective screen 1011. Can do.
  • the diffusion range of the image in the diffusion control body 1016 can be arbitrarily set corresponding to an arbitrary position of the projection surface 1011a of the retroreflective screen 1011. Therefore, the diffusion range of the image can be controlled at an arbitrary position on the projection plane 1011a of the retroreflective screen 1011.
  • FIGS. 13A and 13B are schematic configuration diagrams showing a projection display apparatus according to a third embodiment.
  • FIG. 13A is a plan view and FIG. 13B is a side view.
  • FIG. 14 is a schematic configuration diagram illustrating an example of a projector and a correction mechanism of the projection display device according to the third embodiment.
  • the projection type display apparatus 2010 according to the present embodiment is generally configured by a recursive screen 2011, a projector 2012 arranged to face the recursive screen 2011 at a predetermined distance, and a correction mechanism (not shown). ing.
  • what is indicated by reference numeral 2012 is a projection unit 2026 that constitutes a part of the projector 2012.
  • the recursive screen 2011 has a structure in which transparent beads (spherical bodies) are embedded in one surface 2013a of a substrate 2013 made of resin or the like.
  • One surface 2013a of the substrate 2013 embedded with transparent beads is a projection surface 2011a of the recursive screen 2011.
  • the projector 2012 is a projection video processing unit 2021 for processing a video signal projected on the recursive screen 2011, and converts the signal from the projection video processing unit 2021 into light, and projects the light on the recursive screen 2011.
  • a projection optical unit 2022 that performs the same operation.
  • the projection video processing unit 2021 is projected on the correction data storage unit 2023 in which correction data for correcting the luminance distribution of the video (light) projected from the projector 2012 onto the recursive screen 2011 is recorded, and the recursive screen 2011.
  • a video processing circuit 2025 having at least a correction circuit 2024 for processing a video signal to correct the luminance distribution of the video (light).
  • the projection optical unit 2022 includes a projection unit 2026 that projects an image on the recursive screen 2011.
  • the projection unit 2026 is arranged such that the emission surface 2026a faces the projection surface 2011a of the recursive screen 2011. Then, an image is projected from the exit surface 2026 a of the projection unit 2026 onto the recursive
  • the projection video processing unit 2021 functions as a correction mechanism.
  • the position of the exit surface 2026a of the projection unit 2026 with respect to the projection surface 2011a of the recursive screen 2011 is closer than the optimum position, or the correction mechanism, the exit surface 2026a of the projection unit 2026 with respect to the projection surface 2011a of the recursive screen 2011 is corrected.
  • the position is farther than the optimum position, a similar luminance distribution occurs, and the luminance distribution of the image (light) projected from the projector 2012 onto the recursive screen 2011 is corrected in order to reduce this luminance distribution.
  • a video correction method using the projection display apparatus 2010 will be described.
  • the projection unit 2026 of the projector 2012 is arranged separately from the viewer's eyes 2031 of the video projected on the recursive screen 2011.
  • a straight line (extended line) 2042 obtained by extending a straight line 2041 connecting the viewer's eyes 2031 and the projection unit 2026 to the recursive screen 2011 side is a projection surface 2011a of the recursive screen 2011.
  • the intersecting point is set as the correction center point P2.
  • the luminance distribution of the image (light) projected from the projection unit 2026 onto the projection surface 2011a of the recursive screen 2011 by the projection image processing unit 2021 is concentric with the central point P2 forming the central part, and the central part Is so dark that it gradually becomes brighter toward the peripheral edge.
  • the correction circuit 2024 processes the input video information (video-related signal) 2051 based on the data necessary for video correction recorded in the correction data storage unit 2023, and the video.
  • the brightness distribution of (light) is corrected.
  • the definition of the correction function is also recorded in the correction data storage unit 2023.
  • the projection video processing unit 2021 corrects video information by calculation based on the correction function. Thereby, recursiveness is achieved with respect to the distance between the projection surface 2011a of the recursive screen 2011 and the distance between the projection surface 2011a and the ejection surface 2026a when the position of the exit surface 2026a of the projection unit 2026 is in the optimum position.
  • the video information 2051 is corrected so that the luminance unevenness generated in the video projected on the recursive screen 2011 is canceled out.
  • the luminance distribution of the image 2062 obtained from the image information 2051 is centered as shown in FIG. 15B.
  • the point P2 is a concentric circle forming a central part, and the central part is corrected to be darkest and gradually become brighter toward the peripheral part.
  • the signal corrected by the correction circuit 2024 is output as a drive signal 2052 to the projection optical unit 2022, converted into light by the projection optical unit 2022, and the light is returned from the exit surface 2026a of the projection unit 2026 to the recursive screen. 2011 is projected onto the projection surface 2011a. Then, as shown in FIG.
  • the image 2063 projected from the projection unit 2026 onto the recursive screen 2011 is when the distance between the projection surface 2011a of the recursive screen 2011 and the eyes 2031 of the viewer is optimal. As compared with the image 2061 before correcting the luminance distribution, the luminance unevenness is slightly deteriorated.
  • the recursive screen With respect to the distance between the projection surface 2011a and the exit surface 2026a when the position of the exit surface 2026a of the projection unit 2026 is in the optimum position with respect to the projection surface 2011a of the recurrence screen 2011, the recursive screen.
  • the video 2063 can be viewed as a video with reduced luminance unevenness.
  • viewing and listening can be performed by correcting the luminance distribution of the image 2062 obtained from the image information 2051. Even if the position of the person's eye 2031 is shifted back and forth with respect to the optimum position, the image 2063 projected on the recursive screen 2011 has less luminance unevenness and a wider visual field range.
  • the optimal position of the projection surface 2026a of the projection unit 2026 with respect to the projection surface 2011a of the recursive screen 2011 is the distance between the projection surface 2011a of the recursive screen 2011 and the viewer's eyes 2031 and the recursive screen 2011.
  • the distance between the projection surface 2011a and the exit surface 2026a of the projection unit 2026 is equal, and even if the image information 2051 is projected on the recursive screen 2011 without correction, the luminance of the image (light) does not vary. It is a position where becomes uniform.
  • a correction filter 2071 provided between the projection unit 2026 and the recursive screen 2011 may be used as shown in FIG.
  • the correction filter 2071 is for correcting the transmittance of light projected from the emission surface 2026a of the projection unit 2026 onto the projection surface 2011a of the recursive screen 2011.
  • the luminance distribution of the light is concentric with the center point P2 forming a central portion on the projection surface 2011a of the recursive screen 2011.
  • the correction is performed so that the central part is darkest and gradually becomes brighter toward the peripheral part. Note that when the correction filter 2071 is used, the video information 2051 input to the correction circuit 2024 is converted into the drive signal 2052 without being corrected by the projection video processing unit 2021, and is output to the projection optical unit 2022.
  • the projector 2012 can be disposed in front of and behind the viewer's eyes 2031 with respect to the distance between the projection surface 2011a of the recursive screen 2011 and the viewer's eyes 2031. It becomes. Therefore, the degree of freedom of the positional relationship between the projector 2012 and the viewer's eyes 2031 becomes extremely high, and the utility value is improved.
  • the projector 2012 is arranged such that the distance between the projection surface 2011a of the recursive screen 2011 and the viewer's eye 2031 is equal to the distance between the projection surface 2011a of the recursive screen 2011 and the exit surface 2026a of the projection unit 2026. It is physically impossible.
  • the projection display apparatus 2010 of the present embodiment the degree of freedom of the positional relationship between the projector 2012 and the viewer's eyes 2031 can be increased without significantly reducing the brightness of the video.
  • FIG. 17 is a schematic configuration diagram showing a projection display device according to a fourth embodiment.
  • the projection type display device 2080 according to the present embodiment is generally configured by a recursive screen 2011, a projector 2012 arranged to face the recursive screen 2011 at a predetermined distance, and a correction mechanism (not shown). ing. Note that what is indicated by reference numeral 2012 in FIG. 17 is a projection unit 2026 that constitutes a part of the projector 2012.
  • a video correction method using the projection display device 2080 will be described.
  • the projection unit 2026 of the projector 2012 is arranged separately from the viewer's eyes 2031.
  • the point where the straight line (extension line) obtained by extending the straight line connecting the viewer's eyes 2031 and the projection unit 2026 to the recursive screen 2011 intersects the projection surface 2011a of the recursive screen 2011 is the correction center point. Set as P2.
  • the position of the viewer's eye 2031 is the optimal position of the exit surface 2026a of the projection unit 2026 with respect to the projection surface 2011a of the recursive screen 2011 as in the third embodiment described above. Not only when the position is shifted back and forth with respect to the position, but also when the position is shifted vertically or horizontally with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026 disposed at the optimum position.
  • the center point P2 is set according to the shifted position.
  • the position of the viewer's eye 2031A 1 is behind the projection unit 2026 on a straight line connecting the recursive screen 2011 and the projection unit 2026 arranged at the optimum position.
  • a correction center point P2 is set at the center of the projection surface 2011a of the recursive screen 2011.
  • the position of the viewer's eye 2031B 1 is on the left side (the left side of the page) with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026 arranged at the optimum position. when shifted in), as shown in FIG.
  • a straight line connecting the projection portion 2026 eye 2031B 1 of the viewer, straight lines extending in retro-screen 2011 side (extension) is the projection surface of the retro-screen 2011
  • a point that intersects 2011a is set as a correction center point P2. That is, the correction center point P2 is set on the right side (right side of the drawing) of the projection surface 2011a of the recursive screen 2011.
  • the position of the viewer's eye 2031C 1 is shifted to the right side (the right side of the page) with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026 arranged at the optimum position. and if, as shown in FIG.
  • the correction center point P2 is set on the left side (left side of the paper surface) of the projection surface 2011a of the recursive screen 2011.
  • the position of the correction center point P2 set on the projection surface 2011a of the recursive screen 2011 is the position of the viewer's eye 2031 is the recursive screen 2011, and the projection unit 2026 arranged at the optimum position.
  • the luminance distribution of the image (light) projected on the projection surface 2011a of the recursive screen 2011 from the projection unit 2026 is corrected in the same manner as in the third embodiment described above.
  • the projection display device 2080 of this embodiment by setting the position of the correction center point P2 according to the position of the viewer's eye 2031 with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026, Up and down direction with respect to a position before and after the emission surface 2026a of the projection unit 2026 arranged at an optimal position with respect to the projection surface 2011a of the recursive screen 2011, and a straight line connecting the recursive screen 2011 and the projection unit 2026 Alternatively, an image with little luminance unevenness can be observed even at a position shifted in the left-right direction.
  • FIG. 19 is a schematic configuration diagram showing a projection display device of a fifth embodiment.
  • the projection type display device 2090 according to the present embodiment is roughly configured by a recursive screen 2011, a projector 2012 arranged to face the recursive screen 2011 at a predetermined distance, and a correction mechanism (not shown). ing.
  • reference numeral 2012 what is indicated by reference numeral 2012 is a projection unit 2026 that constitutes a part of the projector 2012.
  • the viewer's eyes 2031 have the same position as the emission surface 2026a of the projection unit 2026 disposed at an optimal position with respect to the projection surface 2011a of the recursive screen 2011, and the projection surface of the recursive screen 2011.
  • An object of the present invention is to enable observation of an image with less luminance unevenness even at positions before and after the emission surface 2026a of the projection unit 2026 arranged at an optimal position with respect to 2011a.
  • the luminance distribution of the video 2101 is corrected so that the central point P2 is a concentric circle having a central portion, the central portion being the darkest and gradually becoming brighter toward the peripheral portion.
  • the luminance distribution of the image 2102 is corrected so that the central point P2 is a concentric circle having a central portion, the central portion being the darkest and gradually becoming brighter toward the peripheral portion. Note that although the video 2102 is generally inferior to the luminance of the video 2101, the luminance unevenness is reduced.
  • the luminance distribution of the video 2103 is corrected so that the central point P2 is a concentric circle having a central portion, the central portion is darkest, and gradually becomes brighter toward the peripheral portion. Note that although the video 2103 is generally inferior to the luminance of the video 2101, the luminance unevenness is reduced.
  • the correction of the luminance distribution of the image (light) projected from the projection unit 2026 onto the projection surface 2011a of the recursive screen 2011 is performed in the same manner as in the third embodiment described above.
  • the luminance unevenness of the image 2101 projected from the exit surface 2026a of the projection unit 2026 onto the recursive screen 2011 is slightly deteriorated, but the luminance unevenness of the image 2102 and the image 2103 is reduced.
  • the image projected on the recursive screen 2011 has little luminance unevenness and a wide visual field range.
  • the projection display apparatus 2090 of this embodiment even when the distance between the recursive screen 2011 and the viewer's eyes 2031 is shifted back and forth from the optimal position, it is possible to observe an image with little luminance unevenness. .
  • the correction center point P2 is set in the same manner as in the fourth embodiment. Set according to the shifted position. In this way, correction is performed according to the position (deviation amount) of the viewer's eye 2031 with respect to a straight line connecting the projection surface 2011a of the recursive screen 2011 and the exit surface 2026a of the projection unit 2026 arranged at an optimal position.
  • the vertical plane or the horizontal direction is shifted with respect to the straight line connecting the projection surface 2011a of the recursive screen 2011 and the emission surface 2026a of the projection unit 2026 arranged at the optimum position. Even at the position, an image with less luminance unevenness can be observed.
  • FIG. 21 is a schematic configuration diagram illustrating an example of a projection display device and a correction mechanism thereof according to a sixth embodiment.
  • the projection display device 2110 of this embodiment is a position detection unit 2111 that detects the position of the viewer's eye 2031 in addition to the projection display device of the third embodiment, the fourth embodiment, or the fifth embodiment described above. It has.
  • the projection video processing unit 2021 functions as a correction mechanism.
  • the position detection means 2111 for example, an infrared detection device, a detection device that captures the position of the viewer's eye 2031 and detects the position by image processing is used.
  • a straight line (extension line) obtained by extending a straight line connecting the viewer's eyes 2031 and the projection unit 2026 to the recursive screen 2011 side is as follows.
  • a point that intersects the projection surface 2011a of the recursive screen 2011 is set as a correction center point P2.
  • the position detection unit 2111 detects the position of the viewer's eye 2031, and outputs data relating to the position of the eye 2031 to the correction circuit 2024.
  • the luminance distribution of the image (light) projected from the projection unit 2026 onto the projection surface 2011a of the recursive screen 2011 by the projection image processing unit 2021 is concentric with the central point P2 forming the central part, and the central part Is so dark that it gradually becomes brighter toward the peripheral edge.
  • the correction circuit 2024 selects or corrects data necessary for video correction from among a plurality of data recorded in the correction data storage unit 2023 according to the position of the eye 2031.
  • the input video information 2051 is processed based on data necessary for video correction by switching data or a correction function, and the luminance distribution of the video (light) is corrected.
  • the projection surface 2011a of the recursive screen 2011 and the viewer's eyes 2031 with respect to the distance between the projection surface 2011a of the recursive screen 2011 and the distance between the projection surface 2026a of the projection unit 2026 and the projection screen 2011a are optimal positions.
  • the video information 2051 is corrected so that the luminance unevenness generated in the video projected on the recursive screen 2011 is canceled.
  • a correction filter 2071 provided between the projection unit 2026 and the recursive screen 2011 may be used as shown in FIG.
  • the projection display device 2110 includes, in addition to the correction filter 2071, a position detection unit 2121 that detects the position of the viewer's eye 2031 and a correction filter position variation mechanism 2122 that varies the position of the correction filter 2071. ing.
  • the position of the viewer's eye 2031 is detected by the position detection unit 2121, and data relating to the position of the eye 2031 is output to the correction filter position variation mechanism 2122. Then, the correction filter position changing mechanism 2122 changes the position of the correction filter 2071 along the straight line connecting the recursive screen 2011 and the projection unit 2026 according to the position of the eye 2031, thereby causing the emission surface of the projection unit 2026 to exit.
  • the transmittance of light projected from 2026a onto the projection surface 2011a of the recursive screen 2011 is corrected.
  • the luminance distribution of the light transmitted through the correction filter 2071 is concentric with the center point P2 forming a central portion on the projection surface 2011a of the recursive screen 2011, the central portion being the darkest, toward the peripheral portion. Correct so that it gradually becomes brighter.
  • the luminance distribution of the video (light) projected from the projection unit 2026 onto the recursive screen 2011 is optimized by the correction mechanism according to the position of the viewer's eyes 2031.
  • the position of the viewer's eye 2031 is vertically or horizontally with respect to a straight line connecting the projection surface 2011a of the recursive screen 2011 and the exit surface 2026a of the projection unit 2026 arranged at an optimal position. Even at a shifted position, an image with little luminance unevenness can be observed. Therefore, the degree of freedom of the positional relationship between the projector 2012 and the viewer's eyes 2031 can be further increased without significantly reducing the luminance of the video. As a result, a virtual space can be easily realized.
  • FIG. 23 is a schematic block diagram which shows a part of projection type display apparatus of 7th Embodiment.
  • the projection display device 2130 of this embodiment is a position detection unit that detects the position of the eye 2031 of the viewer 2030 in addition to the projection display devices of the third embodiment, the fourth embodiment, or the fifth embodiment described above. 2141 are provided.
  • the projection video processing unit 2021 functions as a correction mechanism.
  • the position detection unit 2141 is attached to the ceiling 2151. As the position detection means 2141, the same one as in the above-described sixth embodiment is used.
  • a video correction method using the projection display device 2130 will be described. Similar to the third embodiment, the fourth embodiment, and the fifth embodiment described above, a straight line (extension line) obtained by extending a straight line connecting the eye 2031 of the viewer 2030 and the projection unit 2026 to the recursive screen 2011 side is provided. A point that intersects the projection surface 2011a of the recursive screen 2011 is set as a correction center point P2. Further, the position detection unit 2141 detects the position of the eye 2031 of the viewer 2030 and outputs data related to the position of the eye 2031 of the viewer 2030 to the correction circuit 2024.
  • the luminance distribution of the image (light) projected from the projection unit 2026 onto the projection surface 2011a of the recursive screen 2011 by the projection image processing unit 2021 is concentric with the central point P2 forming the central part, and the central part Is so dark that it gradually becomes brighter toward the peripheral edge.
  • the correction circuit 2024 selects data necessary for video correction from a plurality of data recorded in the correction data storage unit 2023 according to the position of the eye 2031 of the viewer 2030.
  • the input video information 2051 is processed based on data necessary for video correction by correcting the correction data or correction function, and the luminance distribution of the video (light) is corrected.
  • the projection surface 2011a of the recursive screen 2011 and the eyes of the viewer 2030 with respect to the distance between the projection surface 2011a of the recursive screen 2011 and the distance between the projection surface 2026a of the projection unit 2026 and the optimal position.
  • the video information 2051 is corrected so that the luminance unevenness generated in the video projected on the recursive screen 2011 is canceled out.
  • the luminance distribution of the image (light) projected from the projection unit 2026 onto the recursive screen 2011 is optimized by the correction mechanism according to the position of the eye 2031 of the viewer 2030.
  • the position of the eye 2031 of the viewer 2030 is vertically or horizontally with respect to a straight line connecting the projection surface 2011a of the recursive screen 2011 and the emission surface 2026a of the projection unit 2026 arranged at an optimal position. Even at a position shifted in the direction, an image with little luminance unevenness can be observed. Therefore, even when the viewer 2030 moves from the position of the projector 2012 arranged at the optimal position, an image with little luminance unevenness can be observed.
  • FIG. 24 is a schematic configuration diagram showing a part of a projection display apparatus according to an eighth embodiment. 24, the same components as those shown in FIG. 13A, FIG. 13B, and FIG.
  • the projection type display device 2160 of this embodiment includes the position of the projection unit 2026 of the projector 2012 and the eyes of the viewer 2030 in addition to the projection type display device of the third embodiment, the fourth embodiment, or the fifth embodiment described above.
  • a chair 2170 having position detection means 2172 for detecting the position of 2031 is provided.
  • the projection video processing unit 2021 functions as a correction mechanism.
  • the position detection means 2172 is attached to a position at which the head 2032 of the viewer 2030 abuts on the backrest 2171 of the chair 2170. As the position detection means 2172, the same one as in the sixth embodiment described above is used. In addition, the projection unit 2026 of the projector 2012 is attached to the backrest 2171 of the chair 2170 in the vicinity of the position where the head 2032 of the viewer 2030 abuts.
  • a video correction method using the projection display device 2160 will be described.
  • a straight line (extension line) obtained by extending a straight line connecting the eyes 2031 of the viewer 2030 and the projection unit 2026 to the recursive screen 2011 side is a recursive screen.
  • a point intersecting the 2011 projection surface 2011a is set as a correction center point P2.
  • the position detection unit 2172 detects the position of the eye 2031 of the viewer 2030 and outputs data relating to the position of the eye 2031 of the viewer 2030 to the correction circuit 2024.
  • the luminance distribution of the image (light) projected from the projection unit 2026 onto the projection surface 2011a of the recursive screen 2011 by the projection image processing unit 2021 is concentric with the central point P2 forming the central part, and the central part Is so dark that it gradually becomes brighter toward the peripheral edge.
  • the correction circuit 2024 selects data necessary for video correction from a plurality of data recorded in the correction data storage unit 2023 according to the position of the eye 2031 of the viewer 2030.
  • the input video information 2051 is processed based on data necessary for video correction by correcting the correction data or correction function, and the luminance distribution of the video (light) is corrected.
  • the projection surface 2011a of the recursive screen 2011 and the eyes of the viewer 2030 with respect to the distance between the projection surface 2011a of the recursive screen 2011 and the distance between the projection surface 2026a of the projection unit 2026 and the optimal position.
  • the video information 2051 is corrected so that the luminance unevenness generated in the video projected on the recursive screen 2011 is canceled out.
  • the luminance distribution of the video (light) projected from the projection unit 2026 onto the recursive screen 2011 is optimized by the correction mechanism according to the position of the eye 2031 of the viewer 2030.
  • the position of the eye 2031 of the viewer 2030 is vertically or horizontally with respect to a straight line connecting the projection surface 2011a of the recursive screen 2011 and the emission surface 2026a of the projection unit 2026 arranged at an optimal position. Even at a position shifted in the direction, an image with little luminance unevenness can be observed. Therefore, even when the viewer 2030 moves from the position of the projector 2012 arranged at the optimal position, an image with little luminance unevenness can be observed.
  • FIGS. 25A and 25B are schematic configuration diagrams showing a projection display apparatus according to a ninth embodiment.
  • FIG. 25A is a plan view and FIG. 25B is a side view.
  • 25A and 25B the same components as those shown in FIGS. 13A and 13B are denoted by the same reference numerals, and the description thereof is omitted.
  • the projection type display device 2180 of this embodiment includes a recursive screen 2011, a directional scattering screen 2181 disposed in the vicinity of the projection surface 2011a of the recursive screen 2011 so as to overlap the projection surface 2011a, and a directivity.
  • a projector 2012 arranged to face the scattering screen 2181 at a predetermined distance and a correction mechanism (not shown) are schematically configured.
  • a projection unit 2026 that constitutes a part of the projector 2012.
  • the directional scattering screen 2181 has different angles for diffusing the reflected light of the recursive screen 2011 in the width direction and the vertical direction of the recursive screen 2011. That is, the directional scattering screen 2181 diffuses the reflected light of the recursive screen 2011 so that the diffusion angle in the width direction of the recursive screen 2011 is wider than the diffusion angle in the vertical direction, or the recursive screen. The diffusion is performed such that the vertical diffusion angle of 2011 is wider than the diffusion angle in the width direction. In this embodiment, the directional scattering screen 2181 exemplifies a case where the reflected light of the recursive screen 2011 is diffused so that the vertical diffusion angle of the recursive screen 2011 is larger than the diffusion angle in the width direction. .
  • a video correction method using the projection display device 2180 will be described.
  • the projection unit 2026 of the projector 2012 is arranged separately from the viewer's eyes 2031 of the video projected on the recursive screen 2011.
  • a straight line 2041 obtained by extending a straight line 2041 connecting the viewer's eyes 2031 and the projection unit 2026 to the recursive screen 2011 side is one surface of the directional scattering screen 2181.
  • a point that intersects 2181a is set as a correction center point P2.
  • the position of the emission surface 2026a of the projection unit 2026 with respect to the projection surface 2011a of the recursive screen 2011 is in an optimal position, as shown in FIG. 26A, the video information 2051 input to the correction circuit 2024 is not corrected, and the projector An image 2191 obtained by projecting from 2012 to the recursive screen 2011 has no luminance unevenness and uniform luminance.
  • the distance between the recursive screen 2011 and the viewer's eyes 2031 is small or large with respect to the distance between the projection surface 2011a of the recursive screen 2011 and the exit surface 2026a of the projection unit 2026.
  • the image 2191 projected on the recursive screen 2011 has uneven brightness in which the central part is brightest in an elliptical shape and gradually becomes darker toward the peripheral part.
  • the luminance distribution of the image 2192 obtained by the image information 2051 is centered as shown in FIG. 26C.
  • a correction is made so that the central portion around the point P2 has an elliptical shape, the central portion is darkest, and gradually becomes brighter toward the peripheral portion.
  • the signal corrected by the correction circuit 2024 is output as a drive signal 2052 to the projection optical unit 2022, converted into light by the projection optical unit 2022, and the light is returned from the exit surface 2026a of the projection unit 2026 to the recursive screen. 2011 is projected onto the projection surface 2011a. Then, as shown in FIG.
  • the image 2193 projected from the projection unit 2026 onto the recursive screen 2011 is when the distance between the projection surface 2011a of the recursive screen 2011 and the viewer's eyes 2031 is optimal. Compared with the image 2191 before correcting the luminance distribution, the luminance unevenness is slightly deteriorated.
  • the recursive screen With respect to the distance between the projection surface 2011a and the exit surface 2026a when the position of the exit surface 2026a of the projection unit 2026 is in the optimum position with respect to the projection surface 2011a of the recurrence screen 2011, the recursive screen.
  • the video 2193 can be viewed as a video with reduced luminance unevenness. That is, as described above, when the position of the exit surface 2026a of the projection unit 2026 with respect to the projection surface 2011a of the recursive screen 2011 is in an optimal position, the brightness distribution of the image 2192 obtained by the image information 2051 is corrected, thereby allowing viewing. Even if the position of the person's eye 2031 is shifted back and forth with respect to the optimum position, the image 2193 projected on the recursive screen 2011 has less luminance unevenness and a wider visual field range.
  • the luminance distribution of the image (light) projected on the projection surface 2011a of the recursive screen 2011 from the projection unit 2026 is corrected in the same manner as in the third embodiment described above.
  • the recursive screen 2011 is provided.
  • the position of the correction center point P2 according to the position of the viewer's eye 2031 with respect to the straight line connecting the projection unit 2026 and the projection unit 2026, it is arranged at an optimal position with respect to the projection surface 2011a of the recursive screen 2011.
  • an image with little luminance unevenness can be observed even at a position shifted to a position before and after the emission surface 2026a of the projection unit 2026.
  • the directional scattering screen 2181 when the reflected light of the recursive screen 2011 is diffused using the directional scattering screen 2181 or the like, the luminance unevenness of the image (light) increases as the diffusivity increases.
  • the center portion When the directional scattering screen 2181 is not used, as shown in FIG. 27A, the center portion has a circular shape, the center portion is brightest, and brightness unevenness that gradually becomes dark toward the peripheral edge portion occurs.
  • the directional scattering screen 2181 having a small diffusivity is used, as shown in FIG. 27B, the central portion has an elliptical shape, the central portion is brightest, and the brightness unevenness gradually becomes darker toward the peripheral portion. .
  • the diffusivity of the directional scattering screen 2181 When the diffusivity of the directional scattering screen 2181 is gradually increased, the luminance unevenness region exceeds the lower end of the recursive screen 2011 as shown in FIG. 27C. Further, when the diffusivity of the directional scattering screen 2181 is increased, the uneven luminance region exceeds the upper and lower ends of the recursive screen 2011 as shown in FIG. 27D.
  • FIG. 28 is a schematic plan view showing a projection display apparatus according to a tenth embodiment.
  • the projection type display device 2200 of this embodiment includes a recursive screen 2011, a directional scattering screen 2181 disposed near the projection surface 2011a of the recursive screen 2011 so as to overlap the projection surface 2011a, and a directivity.
  • a projector 2012 arranged to face the scattering screen 2181 at a predetermined distance and a correction mechanism (not shown) are schematically configured.
  • what is indicated by reference numeral 2012 is a projection unit 2026 that constitutes a part of the projector 2012.
  • a video correction method using the projection display device 2200 will be described.
  • the projection unit 2026 of the projector 2012 is arranged separately from the viewer's eyes 2031.
  • the point where the straight line (extension line) obtained by extending the straight line connecting the viewer's eyes 2031 and the projection unit 2026 to the recursive screen 2011 intersects the projection surface 2011a of the recursive screen 2011 is the correction center point. Set as P2.
  • the position of the viewer's eye 2031 is the optimal position of the exit surface 2026a of the projection unit 2026 with respect to the projection surface 2011a of the recursive screen 2011 as in the third embodiment described above. Not only when the position is shifted back and forth with respect to the position, but also when the position is shifted vertically or horizontally with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026 disposed at the optimum position.
  • the center point P2 is set according to the shifted position.
  • the position of the viewer's eye 2031A 3 is behind the projection unit 2026 on the straight line connecting the recursive screen 2011 and the projection unit 2026 arranged at the optimum position.
  • the central portion of the projection surface 2011a of the recursive screen 2011 has an elliptical shape, the central portion is brightest, and the brightness unevenness gradually becomes darker toward the peripheral portion.
  • the correction center point P2 is set in the brightest area having an elliptical shape.
  • FIG. 29B the central portion of the projection surface 2011a of the recursive screen 2011 has an elliptical shape, the central portion is brightest, and the brightness unevenness gradually becomes darker toward the peripheral portion.
  • the correction center point P2 is set in the brightest area having an elliptical shape.
  • the position of the viewer's eye 2031B 3 is on the left side (the left side of the page) with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026 arranged at the optimum position.
  • 29A as shown in FIG. 29A, a straight line (extension line) obtained by extending a straight line connecting the viewer's eye 2031B 3 and the projection unit 2026 to the recursive screen 2011 side is a projection surface of the recursive screen 2011. Centering on a point that intersects with 2011a, the central portion is elliptical, and the central portion is brightest, and brightness unevenness that gradually becomes darker toward the peripheral edge portion occurs.
  • the correction center point P2 is set in the brightest area having an elliptical shape, that is, in the area on the right side of the projection surface 2011a of the recursive screen 2011 (the right side of the sheet).
  • the position of the viewer's eye 2031C 3 is shifted to the right side (the right side of the page) with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026 arranged at the optimum position. and if, as shown in FIG. 29C, intersects the eye 2031 c 3 of viewer straight line connecting the projection portion 2026, a straight line obtained by extending the recursive screen 2011 side (extension) is a projection surface 2011a of the retro-screen 2011
  • the center portion is elliptical with the point to be centered, and the center portion is the brightest, and brightness unevenness that gradually becomes darker toward the peripheral portion is generated.
  • the correction center point P2 is set in the brightest area having an elliptical shape, that is, the area on the left side of the projection screen 2011a of the recursive screen 2011 (the left side of the sheet). Further, as shown in FIG. 28, the position of the viewer's eye 2031D 3 is more than the position of the eye 2031C 3 with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026 arranged at the optimum position. Furthermore, when shifted to the right (toward the right), as shown in FIG.
  • the straight line connecting the projection portion 2026 and the eye 2031 d 3 of the viewer, straight lines extending in retro-screen 2011 side (extension) is recursive Centering around the point intersecting the projection surface 2011a of the reflective screen 2011, the central portion is elliptical, the central portion is brightest, and the luminance unevenness gradually becomes darker toward the peripheral portion.
  • the left side (left side of the drawing) of the brightest area having an elliptical shape exceeds the left end (left end of the drawing) of the recursive screen 2011.
  • the correction center point P2 is set in the brightest area having an elliptical shape, that is, the area on the left side of the projection screen 2011a of the recursive screen 2011 (the left side of the sheet).
  • the position of the correction center point P2 set on the projection surface 2011a of the recursive screen 2011 is the position of the viewer's eye 2031 is the recursive screen 2011, and the projection unit 2026 arranged at the optimum position.
  • the luminance distribution of the image (light) projected on the projection surface 2011a of the recursive screen 2011 from the projection unit 2026 is corrected in the same manner as in the third embodiment described above.
  • the projection type display device 2200 of this embodiment even when the directional scattering screen 2181 is disposed in the vicinity of the projection surface 2011a of the recursive screen 2011 so as to overlap the projection surface 2011a, By setting the position of the correction center point P2 according to the position of the viewer's eye 2031 with respect to the straight line connecting the projection unit 2026, it is arranged at an optimal position with respect to the projection surface 2011a of the recursive screen 2011. An image with less luminance unevenness is observed at a position before and after the emission surface 2026a of the projection unit 2026 and at a position shifted in the vertical direction or the horizontal direction with respect to the straight line connecting the recursive screen 2011 and the projection unit 2026. be able to.
  • the luminance unevenness of the image (light) projected on the projection surface 2011a of the recursive screen 2011 includes the relative positions and angles of the recursive screen 2011, the projector 2012, and the viewer's eyes 2031, and the recursive screen 2011 recursively. It depends on the directivity of the reflected light. Since the directivity of the retroreflected light of the recursive screen 2011 is unique (known) to each, by grasping the relative positions and angles of the recursive screen 2011, the projector 2012, and the viewer's eyes 2031, The luminance distribution of the video (light) can be corrected.
  • FIG. 30 is a schematic configuration diagram showing a projection display apparatus according to an eleventh embodiment.
  • FIG. 31 is a schematic configuration diagram illustrating an example of a projector and a correction mechanism of the projection display apparatus according to the eleventh embodiment.
  • the projection display device 3010 of this embodiment includes a recursive screen 3011, a directional scattering screen 3012 disposed in the vicinity of the projection surface 3011 a of the recursive screen 3011 so as to overlap the projection surface 3011 a, and directivity.
  • the projector is roughly composed of three projectors 3013 (3013A, 3013B, 3013C) arranged to face the scattering screen 3012 at a predetermined distance and a correction mechanism (not shown). Note that what is indicated by reference numeral 3013 in FIG. 30 is a projection unit 3026 that constitutes a part of the projector 3013.
  • the recursive screen 3011 has a structure in which transparent beads (spherical bodies) are embedded in one surface 3014a of a substrate 3014 made of resin or the like.
  • One surface 3014a of the substrate 3014 in which the transparent beads are embedded is a projection surface 3011a of the recursive screen 3011.
  • the directional scattering screen 3012 has different angles for diffusing the reflected light of the recursive screen 3011 in the width direction and the vertical direction of the recursive screen 3011. That is, the directional scattering screen 3012 diffuses the reflected light of the recursive screen 3011 so that the diffusion angle in the width direction of the recursive screen 3011 is wider than the diffusion angle in the vertical direction, or the recursive screen.
  • the diffusion is performed so that the diffusion angle in the vertical direction 3011 is wider than the diffusion angle in the width direction.
  • the case where the directional scattering screen 3012 diffuses the reflected light of the recursive screen 3011 so that the vertical diffusion angle of the recursive screen 3011 is larger than the diffusion angle in the width direction is exemplified. .
  • Projectors 3013A, 3013B, and 3013C are arranged at intervals from the directional scattering screen 3012 in order. That is, the projectors 3013A, 3013B, and 3013C are arranged such that the distances from the recursive screen 3011 (directional scattering screen 3012) are different from each other. Further, the projectors 3013A, 3013B, and 3013C are attached to the ceiling of the room where the projection display device 3010 is installed. That is, the projectors 3013A, 3013B, and 3013C are installed above the viewer 3030.
  • the projector 3013 converts a signal from the projection video processing unit 3021 for processing a video signal projected on the recursive screen 3011 and the projection video processing unit 3021 into light, and projects the light onto the recursive screen 3011.
  • the projection optical unit 3022 is configured roughly.
  • the projection video processing unit 3021 is projected on the correction data storage unit 3023 in which correction data for correcting the luminance distribution of video (light) projected from the projector 3013 onto the recursive screen 3011 is recorded, and the recursive screen 3011.
  • a video processing circuit 3025 having at least a correction circuit 3024 for processing a video signal to correct a luminance distribution of the video (light).
  • the projection optical unit 3022 includes a projection unit 3026 that projects an image on the recursive screen 3011.
  • the projection unit 3026 is arranged such that the emission surface 3026a faces the projection surface 3011a of the recursive screen 3011 (one surface 3012a of the directional scattering screen 3012). Then, an image is projected from the emission surface 3026 a of the projection unit 3026 onto the projection surface 3011 a of the recursive screen 3011.
  • An exit surface 3026a of the projection unit 3026 of the projector 3013A is disposed at an optimal position with respect to the projection surface 3011a of the recursive screen 3011.
  • the image 3041 is high in luminance as shown in FIG. 32A. There is no unevenness.
  • FIGS. 32A to 32C when the luminance of the video is high, the video is displayed in a light color.
  • FIGS. 32A to 32C when the luminance of the video is low, the video is displayed in a dark color.
  • the video 3042 has a luminance distribution as shown in FIG. 32B.
  • the central portion of the recursive screen 3011 is brightest in a strip shape along the vertical direction, and gradually becomes darker toward the peripheral portion.
  • the video 3043 has a luminance distribution as shown in FIG. 32C.
  • the central portion of the recursive screen 3011 is brightest in a strip shape along the vertical direction, and gradually becomes darker toward the peripheral portion. Note that as the distance of the projector 3013 from the recursive screen 3011 increases, the image projected from the projector 3013 onto the recursive screen 3011 has lower luminance and higher luminance unevenness.
  • each of the projectors 3013A, 3013B, and 3013C projects the images 3041, 3042, and 3043 on the recursive screen 3011 so that the angle at which the reflected light is diffused is different between the width direction and the vertical direction of the recursive screen 3011.
  • the projectors 3013A, 3013B, and 3013C project images on the recursive screen 3011 so that the enlargement ratios of the images 3041, 3042, and 3043 are sequentially increased from those arranged on the recursive screen 3011 side.
  • the projectors 3013A, 3013B, and 3013C have the images 3041, 3042, and 3043 on the recursive screen 3011 so that the sizes of the images 3041, 3042, and 3043 projected from the projectors are equal on the projection surface 3011a of the recursive screen 3011. 3042 and 3043 are projected.
  • the video that the viewer 3030 can see at any of the observation positions 3030A, 3030B, and 3030C is a video 3044 formed by overlapping the video 3041, 3042, and 3043 as shown in FIG. .
  • the image 3041 projected from the projector 3013A arranged at an optimal position with respect to the projection surface 3011a of the recursive screen 3011 is brightest and dominant, the image 3044 follows the vertical direction of the recursive screen 3011. Although the luminance unevenness occurs such that the central portion is brightest in a belt shape and gradually becomes darker toward the peripheral portion, the luminance unevenness is reduced as a whole, and the visual field range is wide, resulting in a favorable display.
  • the degree of freedom in the positional relationship between the projector 3013 and the eye 3031 of the viewer 3030 is extremely high, and the utility value is improved.
  • the enlargement ratios of the images 3041, 3042, and 3043 are made different. Since the images 3041, 3042, and 3043 are projected on the recursive screen 3011 so that the sizes of 3042 and 3043 are equal to each other, even if the viewer 3030 moves to any of the observation positions 3030A, 3030B, and 3030C, it feels strange. A video 3044 with a small amount can be seen.
  • the directional scattering screen 3012 diffuses the reflected light of the recursive screen 3011 so that the diffusion angle in the vertical direction of the recursive screen 3011 is wider than the diffusion angle in the width direction.
  • this invention is not limited to this.
  • the directional scattering screen may diffuse the reflected light of the recursive screen so that the diffusion angle in the width direction of the recursive screen is wider than the diffusion angle in the vertical direction.
  • the image projected on the recursive screen has brightness unevenness in which the central portion is brightest in a strip shape along the width direction of the recursive screen and gradually becomes darker toward the peripheral portion.
  • the projector 3013 is installed above the viewer 3030.
  • the present invention is not limited to this. In the present invention, the projector may be installed below the viewer.
  • FIG. 34 is a schematic block diagram which shows the projection type display apparatus of 12th Embodiment.
  • FIG. 35 is a schematic configuration diagram illustrating an example of a projector and a correction mechanism of the projection display apparatus according to the twelfth embodiment. 34, the same components as those shown in FIG. 30 are denoted by the same reference numerals, and the description thereof is omitted. 35, the same components as those shown in FIG. 31 are given the same reference numerals, and descriptions thereof will be omitted.
  • the projection type display device 3050 of this embodiment includes a recursive screen 3011, a directional scattering screen 3012 disposed in the vicinity of the projection surface 3011 a of the recursive screen 3011 so as to overlap the projection surface 3011 a, and directivity.
  • the projector is roughly composed of three projectors 3013 (3013A, 3013B, 3013C) arranged to face the scattering screen 3012 at a predetermined distance and a correction mechanism (not shown). Note that what is indicated by reference numeral 3013 in FIG. 34 is a projection unit 3026 that constitutes a part of the projector 3013.
  • the projection video processing unit 3021 functions as a correction mechanism.
  • the projected image processing unit 3021 shows the luminance distribution of the image (light) formed by overlapping the images projected from each of the three projectors 3013A, 3013B, and 3013C on the projection surface 3011a of the recursive screen 3011. Correction is made so that the band is darkest and gradually becomes brighter toward the periphery.
  • the correction circuit 3024 processes the input video information (video-related signal) 3061 based on data necessary for video correction recorded in the correction data storage unit 3023. Then, the luminance distribution of the image (light) is corrected. Further, the correction data storage unit 3023 also records the definition of the correction function.
  • the projection video processing unit 3021 corrects video information by calculation based on the correction function.
  • the signal corrected by the correction circuit 3024 is output as a drive signal 3062 to the projection optical unit 3022, converted into light by the projection optical unit 3022, and the light is returned from the exit surface 3026a of the projection unit 3026. 3011 is projected onto a projection surface 3011a.
  • An exit surface 3026a of the projection unit 3026 of the projector 3013A is disposed at an optimal position with respect to the projection surface 3011a of the recursive screen 3011.
  • the video 3071 has a recursive luminance distribution as shown in FIG. 36A.
  • the central portion is corrected to be darkest in a strip shape along the vertical direction of the screen 3011 and gradually brighter toward the peripheral portion.
  • FIGS. 36A to 36C when the luminance of the video is high, the video is displayed in a light color.
  • FIGS. 36A to 36C when the luminance of the video is low, the video is displayed in a dark color.
  • the central part is brightest in a strip shape along the vertical direction of the recursive screen 3011 and gradually becomes darker toward the peripheral part.
  • the video that the viewer 3030 can see at any of the observation positions 3030A, 3030B, and 3030C is a video 3074 formed by overlapping the videos 3071, 3072, and 3073 as shown in FIG. .
  • the video 3074 has a luminance distribution that is darkest in a band at the center and gradually becomes brighter toward the periphery, but the luminance unevenness is reduced as a whole, and the visual field range is wide and the display is good.
  • a correction filter 3081 provided between the projection unit 3026 and the recursive screen 3011 may be used as shown in FIG.
  • the correction filter 3081 is for correcting the transmittance of light projected from the emission surface 3026a of the projection unit 3026 onto the projection surface 3011a of the recursive screen 3011.
  • the luminance distribution of the light has a central portion along the vertical direction of the recursive screen 3011 on the projection surface 3011a of the recursive screen 3011. Correction is performed so that the band is darkest and gradually becomes brighter toward the periphery. Note that when the correction filter 3081 is used, the video information 3061 input to the correction circuit 3024 is converted into the drive signal 3062 without being corrected by the projection video processing unit 3021, and is output to the projection optical unit 3022.
  • the degree of freedom in the positional relationship between the projector 3013 and the eye 3031 of the viewer 3030 is extremely high, and the utility value is improved.
  • FIG. 39 is a schematic block diagram which shows the projection type display apparatus of 13th Embodiment.
  • FIG. 40 is a schematic configuration diagram illustrating an example of a projector and a correction mechanism of the projection display apparatus according to the thirteenth embodiment. 39, the same components as those shown in FIG. 30 are denoted by the same reference numerals, and the description thereof is omitted. In FIG. 40, the same components as those shown in FIG. 31 are denoted by the same reference numerals, and the description thereof is omitted.
  • the projection type display device 3090 of this embodiment includes a recursive screen 3011, a directional scattering screen 3012 disposed in the vicinity of the projection surface 3011a of the recursive screen 3011 so as to overlap the projection surface 3011a, and a directivity.
  • the projector is roughly composed of three projectors 3013 (3013A, 3013B, 3013C) arranged to face the scattering screen 3012 at a predetermined distance and a correction mechanism (not shown). Note that what is indicated by reference numeral 3013 in FIG. 39 is a projection unit 3026 constituting a part of the projector 3013.
  • the projection display device 3090 of this embodiment includes position detection means 3091 that detects the position of the eye 3031 of the viewer 3030 in addition to the projection display device of the eleventh embodiment or the twelfth embodiment described above. .
  • the projection video processing unit 3021 functions as a correction mechanism.
  • the position detection unit 3091 for example, an infrared detection device, a detection device that captures the position of the eye 3031 of the viewer 3030 and detects the position by image processing is used.
  • a method of projecting an image by the projection display device 3090 will be described.
  • data related to the position of the eye 3031 eg, observation positions 3030A, 3030B, and 3030C
  • the correction circuit 3024 is output to the correction circuit 3024.
  • the projection video processing unit 3021 selects an optimal projector from the projectors 3013A, 3013B, and 3013C according to the positions of the eyes 3031 (observation positions 3030A, 3030B, and 3030C). For example, when the position of the eye 3031 of the viewer 3030 is at the observation position 3030A, the projector 3013A is selected as the optimum projector. Then, the projector 3013A projects an image 3101 on the recursive screen 3011 as shown in FIG. 41A. On the other hand, as shown in FIG.
  • the projector 3013B located at a position farther from the recursive screen 3011 than the projector 3013A does not project an image on the recursive screen 3011 or an image 3101 projected from the projector 3013A.
  • a video 3102 with a significantly lower brightness is projected.
  • the projector 3013C at a position farther from the recursive screen 3011 than the projector 3013B does not project an image on the recursive screen 3011 or an image 3101 projected from the projector 3013A.
  • a video 3103 with a much lower brightness is projected.
  • the video 3104 is alleviated in luminance unevenness as a whole, has a wide visual field range, and is excellent in display.
  • the degree of freedom in the positional relationship between the projector 3013 and the eye 3031 of the viewer 3030 is extremely high, and the utility value is improved.
  • the enlargement ratios of the images 3101, 3102, and 3103 are different. Since the images 3101, 3102, and 3103 are projected on the recursive screen 3011 so that the sizes of 3102 and 3103 are equal, an optimal projector 3013 A is selected according to the position of the viewer 3030 (observation positions 3030 A, 3030 B, and 3030 C). , 3013B and 3013C can be viewed, the video 3104 with less discomfort can be seen.
  • FIGS. 43A and 43B are schematic configuration diagrams showing a part of a projection display apparatus according to a fourteenth embodiment.
  • FIG. 43A is a side view and FIG. 43B is a plan view.
  • 43A and 43B the same components as those shown in FIG. 30 are denoted by the same reference numerals, and the description thereof is omitted.
  • the projection type display device 3100 of this embodiment includes a recursive screen 3011, a directional scattering screen 3012 disposed in the vicinity of the projection surface 3011 a of the recursive screen 3011 so as to overlap the projection surface 3011 a, and directivity.
  • a plurality of projectors 3013 (3013A 1-6 , 3013B 1-6 , 3013C 1-6 ) disposed so as to face the scattering screen 3012 at a predetermined distance and a correction mechanism (not shown) are schematically configured.
  • reference numeral 3013 indicates a projection unit 3026 that constitutes a part of the projector 3013.
  • the projectors 3013A 1 to 6 are arranged at predetermined intervals along the width direction of the recursive screen 3011 and form one row.
  • the projectors 3013B 1 to 6 are arranged at predetermined intervals along the width direction of the recursive screen 3011, and form one row.
  • the projectors 3013C 1 to 6 are arranged at predetermined intervals along the width direction of the recursive screen 3011 and form one row.
  • the projector 3000A 1 , the projector 3000B 1 and the projector 3000C 1 are arranged in order from the recursive screen 3011 side, and form one row.
  • the projector 3000A 2 , the projector 3000B 2 and the projector 3000C 2 are arranged in order from the recursive screen 3011 side, and form one row.
  • the projector 3000A 3 , the projector 3000B 3 and the projector 3000C 3 are arranged in order from the recursive screen 3011 side, and form one row.
  • the projector 3000A 4 , the projector 3000B 4 and the projector 3000C 4 are arranged in this order from the recursive screen 3011 side and form one row.
  • the projector 3000A 5 , the projector 3000B 5 and the projector 3000C 5 are arranged in order from the recursive screen 3011 side, and form one row.
  • the projector 3000A 6 , the projector 3000B 6 and the projector 3000C 6 are arranged in order from the recursive screen 3011 side, and form one row.
  • the first row of the projector 3013a 1 ⁇ 6 is formed, the second column the projector 3013 b 1 ⁇ 6 is formed, the third column the projector 3013C 1 ⁇ 6 is formed, in order from the retro-screen 3011 side Arranged at intervals.
  • a method of projecting an image by the projection display device 3100 will be described. For example, in the same manner as in the thirteenth embodiment described above, when the position of the eye 3031 of the viewer 3030 is detected by the position detection unit, data relating to the position of the eye 3031 (for example, the observation positions 3030A, 3030B, and 3030C) is obtained. , And output to the correction circuit 3024 of the projection video processing unit 3021 described above.
  • the projected image processing section 3021 the position of the eye 3031 (observation position 3030A, 3030B, 3030C) in response to, among projectors 3013A 1 ⁇ 6, 3013B 1 ⁇ 6, 3013C 1 ⁇ 6, the optimal projector selection Is done.
  • the position of the eye 3031 of the viewer 3030 is at the observation position 3030A
  • either the projector 3013A 3 or the projector 3013A 4 or both the projector 3013A 3 and the projector 3013A 4 is selected as the optimum projector.
  • either the projector 3013A 3 or the projector 3013A 4 or both the projector 3013A 3 and the projector 3013A 4 project an image on the recursive screen 3011.
  • the projector 3013 other than the projectors 3013A 3 and 3013A 4 does not project an image on the recursive screen 3011, or projects an image with a significantly lower brightness than the image projected from the projectors 3013A 3 and 3013A 4. .
  • the image projected from 3013 is formed so as to overlap. This image has a reduced luminance unevenness as a whole, a wide visual field range, and a good display.
  • the degree of freedom in the positional relationship between the projector 3013 and the eye 3031 of the viewer 3030 can be further increased without significantly reducing the luminance of the video. As a result, a virtual space can be easily realized.
  • FIGS. 44A and 44B are schematic configuration diagrams showing a projection display apparatus according to a fifteenth embodiment.
  • FIG. 44A is a plan view and FIG. 44B is a side view. 44A and 44B, the same components as those shown in FIG. 30 are denoted by the same reference numerals, and the description thereof is omitted.
  • the projection type display device 3110 of this embodiment includes a recursive screen 3011, a directional scattering screen 3012 disposed in the vicinity of the projection surface 3011 a of the recursive screen 3011 so as to overlap the projection surface 3011 a, and directivity.
  • the projector 3013 is roughly configured by a projector 3013 arranged to face the scattering screen 3012 at a predetermined distance and a correction mechanism (not shown). 44A and 44B, reference numeral 3013 denotes a projection unit 3026 that constitutes a part of the projector 3013.
  • the projection unit 3026 of the projector 3013 is arranged apart from the viewer's eyes 3031 of the video projected on the recursive screen 3011.
  • a straight line (extended line) 3122 obtained by extending a straight line 3121 connecting the viewer's eye 3031 and the projection unit 3026 to the recursive screen 3011 side is one surface of the directional scattering screen 3012.
  • a point that intersects 3012a is set as a correction center point P3.
  • the projector does not correct the video information 3061 input to the correction circuit 3024.
  • An image 3131 obtained by projecting from 3013 onto the recursive screen 3011 has no luminance unevenness and uniform luminance.
  • the distance between the recursive screen 3011 and the viewer's eyes 3031 is small or large with respect to the distance between the projection surface 3011a of the recursive screen 3011 and the exit surface 3026a of the projection unit 3026, As shown in FIG. 45B, the video 3131 projected on the recursive screen 3011 has brightness unevenness in which the central part is brightest in an elliptical shape and gradually becomes darker toward the peripheral part.
  • the luminance distribution of the image 3132 obtained by the image information 3061 is centered as shown in FIG. 45C.
  • the center portion around the point P3 has an elliptical shape, and the center portion is darkest and is corrected so that it gradually becomes brighter toward the peripheral portion.
  • the signal corrected by the correction circuit 3024 is output as a drive signal 3062 to the projection optical unit 3022, converted into light by the projection optical unit 3022, and the light is returned from the exit surface 3026a of the projection unit 3026.
  • 3011 is projected onto a projection surface 3011a. Then, as shown in FIG.
  • the recursive screen With respect to the distance between the projection surface 3011a of the projection unit 3026 and the projection surface 3011a of the recursive screen 3011 in the optimum position (distance between the projection surface 3011a and the ejection surface 3026a), the recursive screen.
  • the video 3133 can be viewed as a video with reduced luminance unevenness.
  • the position of the exit surface 3026a of the projection unit 3026 with respect to the projection surface 3011a of the recursive screen 3011 is in an optimal position, the brightness distribution of the image 3132 obtained by the image information 3061 is corrected, thereby allowing viewing. Even if the position of the person's eye 3031 is shifted back and forth with respect to the optimum position, the image 3133 projected on the recursive screen 3011 has less luminance unevenness and a wider visual field range.
  • the luminance distribution of the image (light) projected from the projection unit 3026 onto the projection surface 3011a of the recursive screen 3011 is corrected in the same manner as in the above eleventh embodiment.
  • the recursive screen 3011 even when the directional scattering screen 3012 is disposed in the vicinity of the projection surface 3011a of the recursive screen 3011 so as to overlap the projection surface 3011a, the recursive screen 3011.
  • the position of the correction center point P3 according to the position of the viewer's eye 3031 with respect to the straight line connecting the projection unit 3026 and the projection unit 3026, it is arranged at an optimal position with respect to the projection surface 3011a of the recursive screen 3011.
  • an image with less luminance unevenness can be observed even at a position shifted to a position before and after the emission surface 3026a of the projection unit 3026.
  • the central portion has a circular shape, the central portion is brightest, and the brightness unevenness is gradually reduced toward the peripheral portion.
  • the central portion has an elliptical shape, the central portion is brightest, and the brightness unevenness gradually becomes darker toward the peripheral portion. .
  • FIG. 47 is a schematic plan view showing a projection display apparatus according to a sixteenth embodiment. 47, the same components as those shown in FIGS. 30, 44A, and 44B are denoted by the same reference numerals, and the description thereof is omitted.
  • the projection type display device 3140 of the present embodiment includes a recursive screen 3011, a directional scattering screen 3012 disposed in the vicinity of the projection surface 3011a of the recursive screen 3011 so as to overlap the projection surface 3011a, and a directivity.
  • the projector 3013 is roughly configured by a projector 3013 disposed so as to face the scattering screen 3012 at a predetermined distance and a correction mechanism (not shown).
  • what is indicated by reference numeral 3013 is a projection unit 3026 that constitutes a part of the projector 3013.
  • a video correction method using the projection display device 3140 will be described.
  • the projection unit 3026 of the projector 3013 is arranged separately from the viewer's eyes 3031.
  • a point where a straight line (extended line) obtained by extending a straight line connecting the viewer's eyes 3031 and the projection unit 3026 to the recursive screen 3011 intersects the projection surface 3011a of the recursive screen 3011 is a correction center point.
  • the position of the viewer's eye 3031 is the optimum position of the exit surface 3026a of the projection unit 3026 with respect to the projection surface 3011a of the recursive screen 3011 as in the eleventh embodiment. Not only when the position is shifted back and forth with respect to the position, but also when the position is shifted vertically or horizontally with respect to a straight line connecting the recursive screen 3011 and the projection unit 3026 arranged at the optimum position.
  • the center point P3 is set according to the shifted position.
  • the position of the viewer's eye 3031A 11 is behind the projection unit 3026 on a straight line connecting the recursive screen 3011 and the projection unit 3026 arranged at the optimum position.
  • the central portion of the projection surface 3011a of the recursive screen 3011 has an elliptical shape, the central portion is brightest, and brightness unevenness that gradually becomes darker toward the peripheral portion is generated.
  • the correction center point P3 is set in the brightest area having an elliptical shape.
  • FIG. 48B the central portion of the projection surface 3011a of the recursive screen 3011 has an elliptical shape, the central portion is brightest, and brightness unevenness that gradually becomes darker toward the peripheral portion is generated.
  • the correction center point P3 is set in the brightest area having an elliptical shape.
  • the position of the viewer's eye 3031B 11 is on the left side (the left side of the page) with respect to the straight line connecting the recursive screen 3011 and the projection unit 3026 arranged at the optimum position.
  • 48A as shown in FIG. 48A, a straight line (extension line) obtained by extending a straight line connecting the viewer's eye 3031B 11 and the projection unit 3026 to the recursive screen 3011 side is the projection surface of the recursive screen 3011. Centering on a point that intersects 3011a, the central portion is elliptical, and the central portion is brightest, and brightness unevenness that gradually becomes darker toward the peripheral portion is generated. At this time, the correction center point P3 is set in the brightest area having an elliptical shape, that is, the area on the right side of the projection surface 3011a of the recursive screen 3011 (the right side of the sheet).
  • the position of the viewer's eyes 3031C 11 is shifted rightward (toward the right) to a straight line connecting the retro-screen 3011, a projection portion 3026 disposed in the optimum position and if, as shown in FIG. 48C, intersects the eye 3031C 11 of viewer straight line connecting the projection portion 3026, a straight line obtained by extending the recursive screen 3011 side (extension) is a projection surface 3011a of the retro-screen 3011
  • the center portion is elliptical with the point to be centered, and the center portion is the brightest, and brightness unevenness that gradually becomes darker toward the peripheral portion is generated.
  • the correction center point P3 is set in the brightest area having an elliptical shape, that is, the area on the left side of the projection surface 3011a of the recursive screen 3011 (the left side of the sheet). Further, as shown in FIG. 47, the position of the viewer's eye 3031D 11 is more than the position of the eye 3031C 11 with respect to a straight line connecting the recursive screen 3011 and the projection unit 3026 arranged at the optimum position. Furthermore, when shifted to the right (toward the right), as shown in FIG.
  • the straight line connecting the projection portion 3026 eye 3031D 11 viewers, straight lines extending in retro-screen 3011 side (extension) is recursive Centering on the point intersecting the projection surface 3011a of the reflective screen 3011, the central part is elliptical, the central part is brightest, and the brightness unevenness gradually becomes darker toward the peripheral part.
  • the left side (left side of the drawing) of the brightest area having an elliptical shape exceeds the left end (left end of the drawing) of the recursive screen 3011.
  • the correction center point P3 is set in the brightest area having an elliptical shape, that is, the area on the left side of the projection surface 3011a of the recursive screen 3011 (the left side of the sheet).
  • the position of the correction center point P3 set on the projection surface 3011a of the recursive screen 3011 is set such that the position of the viewer's eye 3031 is the recursive screen 3011 and the projection unit 3026 arranged at the optimum position.
  • the luminance distribution of the image (light) projected from the projection unit 3026 onto the projection surface 3011a of the recursive screen 3011 is corrected in the same manner as in the above eleventh embodiment.
  • the projection display device 3140 of this embodiment by setting the position of the correction center point P3 according to the position of the viewer's eye 3031 with respect to the straight line connecting the recursive screen 3011 and the projection unit 3026, Up and down direction with respect to a position before and after the exit surface 3026a of the projection unit 3026 arranged at an optimal position with respect to the projection surface 3011a of the recursive screen 3011 and a straight line connecting the recursive screen 3011 and the projection unit 3026 Alternatively, an image with little luminance unevenness can be observed even at a position shifted in the left-right direction.
  • the luminance unevenness of the image (light) projected on the projection surface 3011a of the recursive screen 3011 includes the relative positions and angles of the recursive screen 3011, the projector 3013, and the viewer's eyes 3031, and the recursive screen 3011 recursively. It depends on the directivity of the reflected light. Since the directivity of the retroreflected light of the recursive screen 3011 is unique (known), the relative position and angle of the recursive screen 3011, the projector 3013, and the viewer's eye 3031 can be grasped. The luminance distribution of the video (light) can be corrected.
  • FIG. 49 is an enlarged perspective view of the main part showing the configuration of the directional reflective screen of this embodiment.
  • the directional reflection screen 4010 condenses incident light (image light) projected from an image projection unit such as a projector along the horizontal direction H and reflects it again toward the incident direction of the incident light (image light).
  • a horizontal reflection unit 4011 and a vertical diffusion unit 4012 that diffuses the horizontal reflected light along the vertical direction P are provided.
  • the horizontal reflection part 4011 and the vertical diffusion part 4012 are formed so as to spread and overlap on different surfaces.
  • the horizontal reflection portion 4011 and the vertical diffusion portion 4012 are joined via a joining surface (bonding surface) 4015, and are integrated into a sheet shape.
  • Such a directional reflection screen 4010 has an incident surface for incident light projected from the image projection unit and an exit surface for reflected light reflected on the vertical diffusion unit 4012 side.
  • the horizontal reflecting portion 4011 is formed by arranging a plurality of sets of two reflecting surfaces 4011a and 4011b intersecting each other at a predetermined angle ⁇ , for example, 90 °. That is, the prism shapes are made continuous and the ridgelines that intersect with the prism shapes are arranged so as to extend along the vertical direction P.
  • a brightness enhancement film BEFII Suditomo 3M Co., Ltd.
  • BEFII Suditomo 3M Co., Ltd.
  • the prism-shaped projector side (hereinafter sometimes referred to as the front surface S41) or the back surface S42 in FIG. 50 may be a mirror (mirror surface). Since the above-described brightness enhancement film BEFII is made of resin, depending on the angle of the light incident on the prism shape, the light may not be reflected and may be transmitted. Therefore, the amount of reflected light can be increased by adding a mirror to the prism shape. This mirror can be easily formed, for example, by vapor-depositing aluminum on the prism-shaped surface or back surface shown in FIG.
  • the vertical diffusing unit 4012 only needs to be composed of, for example, a lenticular sheet including a lens group in which a plurality of bowl-shaped lenses 4012a extending in the horizontal direction H are arranged in the vertical direction P.
  • the vertical diffusion portion 4012 generally has a refractive index n3 of around 1.5, but may have other values.
  • incident light (image light) L is incident on the directional reflection screen 4010 from, for example, a projector (image projection unit) 4030 or the like
  • the incident light L is transmitted through the vertical diffusing unit 4012 and is incident on the horizontal reflecting unit 4011.
  • Incident light L reaching the horizontal reflecting portion 4011 is sequentially reflected by two reflecting surfaces 4011a and 4011b intersecting each other, and reflected in the incident direction in the horizontal direction H. Therefore, the incident light L that reaches the entire surface of the horizontal reflecting portion 4011 is condensed and diffused at the light emitting position of the projector 4030 in the horizontal direction H.
  • the vertical diffusing unit 4012 extends so that each bowl-shaped lens is orthogonal to the intersecting line of the reflecting surfaces 4011a and 4011b, and the reflected light M that retains the horizontal directivity reflected by the horizontal reflecting unit 4011. Are diffused in the vertical direction P by the respective lenses 4012a and returned to the light emitting direction of the projector 4030. With such a structure, an image projected on the directional reflection screen 4010 can be observed even when an image observer is directly under the projector 4030.
  • Such a projector (image projection means) 4030 is composed of, for example, two projectors, a right-eye projector 4030L and a left-eye projector 4030R, and is combined with a directional reflection screen 4010 to constitute an image display device 4001. Then, by projecting images corresponding to the parallax of both eyes from these two projectors 4030L and 4030R, as shown in FIG. 51, a stereoscopic image can be obtained even if the observer does not use special instruments such as stereoscopic glasses. 3D image display device capable of observing various images can be realized.
  • an antireflection body 4013 is formed on the surface of the vertical diffusion portion 4012 constituting the directional reflection screen 4010, that is, the incident light incident surface.
  • FIG. 52 is an enlarged cross-sectional view showing an antireflection body.
  • the antireflection body 4013 is formed, for example, by arranging a large number of fine conical projections 4013a (see the micrograph shown in FIG. 66).
  • the antireflector 4013 has a moth-eye structure, and incident light that has propagated through the air layer is incident on the vertical diffuser 4012 due to a sudden change in refractive index due to such fine protrusions 4013a. To prevent reflection.
  • the moth-eye structure constituting the antireflection body 4013 is, for example, a concavo-convex structure having a height h of about several hundreds of nanometers, where the wavelength of incident light from the projector is ⁇ , and the formation period (formation pitch) of the concavo-convex is a. , A ⁇ .
  • the incident light from the projector is incident on the interface of the antireflection body 4013 (refractive index n3) on which the moth-eye structure is formed.
  • the refractive index gradually changes from n1 to n3 by such a moth-eye structure, surface reflection is suppressed, and most of the light (incident light) emitted from the projector is not reflected (lost).
  • the light is incident on the vertical diffusion unit 4012 and can reach the horizontal reflection unit 4011.
  • the refractive index stepwise it is also preferable to change the refractive index stepwise. That is, when the refractive index n1 of the air layer is 1.0, the refractive index n2 of the antireflection body 4013 is 1.3, the refractive index n3 of the vertical diffusion part 4012 is 1.5, and the refractive index of the antireflection body 4013. It is also preferable to use a material in which the refractive index of the vertical diffusion portion 4012 is larger than that of the air layer and the refractive index of the vertical diffusion portion 4012 is changed stepwise by using a material that is larger than that of the antireflection body 4013.
  • the vertical diffusion unit 4012 is used. Since the antireflection body 4013 is formed on the surface, the surface reflection is suppressed, and the incident light is incident on the vertical diffusing unit 4012 without being reflected and can reach the horizontal reflecting unit 4011. As a result, a higher quality display image can be obtained.
  • the stereoscopic display device using the projector (image projection unit) 4030 for example, two projectors, a right eye projector 4030L and a left eye projector 4030R, by suppressing reflected light on the surface of the vertical diffusion unit 4012. Since the right-eye video and the left-eye video are mixed (crosstalk), it is possible to project a high-quality and clear stereoscopic image without deteriorating the quality of the image.
  • the above-described directional reflection screen 4010 has different images for each observer, depending on the projectors 4030a, 4030b, and 4030c corresponding to the plurality of observers 4000A, 4000B, and 4000C. Images from different viewpoints can be projected clearly without crosstalk.
  • the projection light projected from the projector 4030a is surface-reflected before entering the directional reflection screen 4010 and is directed toward the observer 4000C, and image light (reflected light) C4 originally observed by the observer 4000C. It is possible to effectively prevent image deterioration due to mixing (crosstalk).
  • an antireflection body 4013 is formed integrally with the surface of the vertical diffusion portion 4012 or is formed by sticking a sheet-like antireflection body 4013 to the surface of the vertical diffusion portion 4012. Also good.
  • other embodiments of the antireflection body will be exemplified.
  • FIG. 54 is an essential part enlarged perspective view showing a configuration of a directional reflective screen according to an eighteenth embodiment.
  • the directional reflection screen 4040 is formed by joining a vertical diffusion unit 4041 made of a lenticular sheet having a lens group in which a plurality of bowl-shaped lenses 4041a are arranged in the vertical direction and a horizontal reflection unit 4042 made of a prism reflection sheet. .
  • An antireflection body 4043 having a large number of moth-eye structures is formed on the surface of the vertical diffusion portion 4041 through a planarization layer 4044.
  • the flattening layer 4044 fills the groove at the boundary portion between the adjacent bowl-shaped lenses 4041a, and forms the flat surface F on the side where the antireflection body 4043 is formed. Accordingly, the antireflection body 4043 can be formed flat without causing large unevenness, and a predetermined antireflection function can be exhibited.
  • Such a flattening layer 4044 has an antireflector when the refractive index n1 of the air layer is 1, the refractive index n2 of the antireflector 4043 is 1.3, and the refractive index n3 of the vertical diffuser 4041 is 1.5. What is necessary is just to be comprised from the material of the refractive index larger than the refractive index of 4043, and smaller than the refractive index of the vertical diffusion part 4041. As a result, the incident light incident from the air layer gradually increases in refractive index as it travels to the antireflection body 4043 and the flattening layer 4044, and before the incident light reaches the horizontal reflecting portion 4042 due to a sudden change in refractive index. Can be prevented from being reflected.
  • FIG. 55A Nineteenth Embodiment
  • a corner cube (cubic prism) 4051 which is a three-dimensional reflection portion.
  • a three-dimensional reflection portion is constructed from corner cube sheets (prism sheets) 4052 in which such corner cubes (three-dimensional reflection portions) 4051 are arranged vertically and horizontally at a fine pitch (usually nanometer (nm) order to micrometer ( ⁇ m) order). (See FIG. 55B).
  • This corner cube (stereoscopic reflecting portion) 4051 has three reflecting surfaces (first mirror surface 4051a, second mirror surface 4051b, third mirror surface 4051c, first mirror surface 4051a, second mirror surface 4051b in the 17th embodiment.
  • the third mirror surface 4051c is formed so as to be perpendicular to the first mirror surface 4051a and the second mirror surface 4051b, respectively, in the same manner as the prism shape of the embodiment, and is emitted from the projector 4056 which is a left eye projector.
  • Incident light incident on 4051 sequentially hits all reflective surfaces (three surfaces) (see symbols m1 to m3 indicating reflection in the figure), and the reflected light is emitted in the incident direction of the incident light.
  • 63A and 63B show an image display device 4054 using a corner cube sheet 4052 in which a large number of such corner cubes 4051 are arranged.
  • 63A is a view as seen from the top surface along the vertical direction
  • FIG. 63B is a view as seen from the side surface along the horizontal direction.
  • the corner cube sheet 4052 has directivity in both the horizontal direction and the vertical direction from the incident light L43 (see the solid line in the figure) incident on the directional reflection screen 4059 provided with the corner cube sheet 4052 from the projector (image projection means) 4056. Reflect while keeping (see dotted line in the figure).
  • incident light L43 incident on the corner cube sheet 4052 solid line in the figure
  • reflected light L44 reflected on the corner cube sheet 4052 see the dotted line in the figure
  • an image can be selectively observed with the observer's eyes 4000 only in the vicinity of the projector 4056.
  • an antireflection body 4058 is provided on the surface of the corner cube sheet 4052.
  • a vertical diffusion portion 4053 made of a lenticular sheet or the like on the surface of the corner cube sheet 4052.
  • the corner cube sheet 4052 retains not only the horizontal direction but also the directivity in the vertical direction.
  • the antireflection body 4058 may be formed on the surface of the corner cube sheet 4052 or the surface of the vertical diffusion portion 4053.
  • the light emitted from the projector 4056 is diffused in the vertical direction on the surface of the diffusion lens of the vertical diffusion unit 4053.
  • Reference numeral 404 denotes light reflected by the corner cube sheet 4052 and diffused by the diffusion lens of the vertical diffusion unit 4053.
  • fine irregularities (projections) 4062a constituting the antireflection body 4062 formed in the vertical diffusion portion 4061 are elongated and extend in the vertical direction P of the vertical diffusion portion 4061. You may be comprised from a protrusion.
  • a directional reflecting screen 4070 shown in FIG. 57 is formed by joining a horizontal reflecting portion 4071 and a vertical diffusing portion 4072 as in the seventeenth embodiment, but the surface of the vertical diffusing portion 4072 has a surface.
  • This is a bowl-shaped lenticular sheet (refractive index n2), which is an example in which a low reflection layer (antireflection body: refractive index n3) 4073 is formed on the vertical diffusion portion 4072.
  • refractive index n3 antireflection body
  • the reflection R1 is expressed by the following formula (1).
  • the reflection R2 at the interface between the low reflection layer 4073 and the vertical diffusion portion 4072 is expressed by the following formula (2).
  • the low reflection layer 4073 When the low reflection layer 4073 is not formed (conventional example), reflection at the interface between the air layer (refractive index n1) and the vertical diffusion portion (lenticular sheet: refractive index n3) reaches 4%. For this reason, it is possible to effectively suppress surface reflection of incident light by forming the low reflection layer 4073 between the air layer and the vertical diffusion portion 4072 as in the present embodiment. Therefore, by applying such a directional reflection screen 4070 to a stereoscopic image display apparatus as shown in FIG. 61, a clearer and higher quality display image can be obtained.
  • another low reflection layer may be formed in an overlapping manner.
  • two low reflection layers (antireflection bodies) 4083 (refractive index n2) and 4084 (refractive index n5) are formed so as to overlap the vertical diffusion portion 4082 (refractive index n3). Yes. Assuming that the air layer (refractive index n1) is used, it is only necessary that the relationship between these refractive indexes be n1 ⁇ n5 ⁇ n2 ⁇ n3.
  • the refractive index gradually changes in the optical path of incident light from the air layer through the two low reflection layers 4083 and 4084 to the vertical diffusing portion 4082, so the ratio of incident light reflected on the way is reduced. It becomes possible to do.
  • FIG. 60 is an explanatory view showing an embodiment in which an optical interference layer is applied as an antireflection body.
  • the incident light L constituting the directional reflection screen 4090 is reflected by the surface F1 of the optical interference layer (antireflection body) 4091 and the interface F2 of the vertical diffusion portion 4092 and the optical interference layer 4091.
  • the optical interference layer 4091 is in contact with air.
  • the optical interference effect is wavelength-dependent and also has an optical interference layer thickness dependency.
  • a plurality of optical interference layers (antireflection bodies) 4091a, 4091b, and 4091c may be formed on the vertical diffusion portion 4092 functioning as a diffusion lens.
  • Examples of means for forming such an optical interference layer (antireflection body) include formation by a coating method or film sticking method.
  • the optical interference layer 4091a has a thickness of d1 and a refractive index of n1.
  • the optical interference layer 4091b has a thickness of d2 and a refractive index of n2.
  • the optical interference layer 4091c has a thickness of d3 and a refractive index of n3.
  • the vertical diffusion portion 4092 has a thickness of d4 and a refractive index of n4. Note that the optical interference layer 4091a is in contact with air having a refractive index of n0.
  • a protective layer 4093 may be further formed over the uppermost optical interference layer (antireflection body) 4091a as shown in FIG.
  • a protective layer 4093 may be made of a hard film such as TAC (triacetyl cellulose) or PET (polyethylene terephthalate). Note that the protective layer 4093 is in contact with air having a refractive index of n0.
  • FIGS. 64A and 64B are plan views showing the configuration of an image display apparatus according to a twenty-fourth embodiment.
  • 64A is a view as seen from the top surface along the vertical direction
  • FIG. 64B is a view as seen from the side surface along the horizontal direction.
  • the directional reflection screen 4095 in this embodiment includes a horizontal reflection portion 4096 and a vertical diffusion portion 4097. Further, an antireflection body 4098a is provided on the front side of the horizontal reflection portion 4096, and an antireflection is provided on the front surface of the vertical diffusion portion 4097.
  • Each body 4098b is formed.
  • the horizontal reflecting portion 4096 is, for example, from a sheet in which prism shapes shown in FIG. 50 are continuously formed, or a sheet (corner cube sheet) in which corner cubes that are three-dimensional reflecting portions shown in FIG. 55A are continuously formed. It only has to be configured.
  • the antireflection body 4098a and the antireflection body 4098b are composed of, for example, a moth eye (compound eye) structure in which a number of fine conical protrusions shown in FIG. 52 are arranged, a low reflection layer shown in FIG. It only has to be done.
  • the antireflection body 4098a includes surface reflection that occurs when incident light from the projector (image projection unit) 4099 enters the horizontal reflecting portion 4096 and surface reflection that occurs when the incident light enters the vertical diffusing portion 4097. And the antireflection body 4098b can suppress or prevent each of them. Accordingly, even when the vertical reflection and the horizontal reflection of the directional reflection screen 4095 are configured by different reflectors, it becomes possible to display a clearer image.
  • FIG. 67 is an optical micrograph (transmission) of the anisotropic diffusion adhesive sheet.
  • This anisotropic diffusion sheet includes needle-like fillers dispersed in an anisotropic diffusion adhesive layer, and the fillers are oriented in one direction parallel to the sheet plane. The action of the anisotropic diffusion sheet in which such needle-like fillers are oriented is shown in FIG.
  • the light L45 incident on the anisotropic diffusion sheet (vertical diffusion portion) 4101 is perpendicular to the orientation direction of the needle-like filler 4103 by the needle-like filler 4103 dispersed in the anisotropic diffusion adhesive layer 4102 (in the drawing). In the Y direction). In FIG. 68, the anisotropic diffusion adhesive layer 4102 diffuses the light L45 in one direction (Y axis).
  • Reference numeral 405 indicates the shape of light diffused anisotropically.
  • the first aspect of the present invention can be used in the field of projection-type video display systems.
  • the second aspect of the present invention can be used in the field of projection display devices.
  • the third aspect of the present invention can be used in the field of projection display devices.
  • SYMBOLS 1010 Video display system, 1011 ... Retroreflective screen, 1012, 1013, 1014 ... Projector, 1015 ... Half mirror, 1016 ... Diffusion control body, 1050 ... Liquid lens, 1060 1070, 1080, 1090 ... liquid crystal lens, 1100, 1120 ... polymer dispersed liquid crystal element, 2010, 2080, 2090, 2110, 2130, 2160, 2180, 2200 ... projection type display device, 2011. ..Recursive screen 2012 ... Projector 2013 ... Substrate 2021 Projection image processing unit 2022 Projection optical unit 2023 Correction data storage unit 2024 Correction circuit , 2025 ... Video processing circuit, 2026 ... Projection unit, 2030 ...

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)

Abstract

La présente invention concerne un système d'affichage vidéo, comprenant un écran rétroréfléchissant, et une pluralité de projecteurs servant chacun à projeter une image sur l'écran rétroréfléchissant. Chaque projecteur est disposé au niveau d'une position verticale quelconque, éloignée de la position de l'œil de l'observateur d'une image. Un élément de commande de diffusion servant à diffuser verticalement la lumière est empilé sur la surface de projection de l'écran rétroréfléchissant.
PCT/JP2012/061518 2011-05-02 2012-05-01 Système d'affichage vidéo, dispositif d'affichage de projection, écran à réflexion directionnelle, et dispositif d'affichage à couche WO2012150703A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2011103102A JP2014139591A (ja) 2011-05-02 2011-05-02 投射型表示装置
JP2011-103102 2011-05-02
JP2011103103A JP2014139592A (ja) 2011-05-02 2011-05-02 投射型表示装置
JP2011-103103 2011-05-02
JP2011-107495 2011-05-12
JP2011107495A JP2014139594A (ja) 2011-05-12 2011-05-12 映像表示システム
JP2011-169309 2011-08-02
JP2011169309A JP2014139596A (ja) 2011-08-02 2011-08-02 指向性反射スクリーン、画層表示装置

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WO2012150703A1 true WO2012150703A1 (fr) 2012-11-08

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JP2014164197A (ja) * 2013-02-26 2014-09-08 Nikon Corp スクリーンおよび投射システム
CN104766928A (zh) * 2014-01-06 2015-07-08 三星显示有限公司 有机发光二极管显示面板及其制造方法
JP2017201418A (ja) * 2017-07-13 2017-11-09 株式会社ニコン スクリーンおよび投射システム

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JPH06242511A (ja) * 1993-02-19 1994-09-02 A G Technol Kk 投射表示用スクリーン
JP2001042251A (ja) * 1999-08-04 2001-02-16 Minolta Co Ltd 映像表示装置
WO2002025369A1 (fr) * 2000-09-21 2002-03-28 Hitachi, Ltd. Unite de visualisation
JP2005010481A (ja) * 2003-06-19 2005-01-13 Seiko Epson Corp 反射型スクリーン
WO2007105721A1 (fr) * 2006-03-13 2007-09-20 Dai Nippon Printing Co., Ltd. Element de diffusion optique, ecran de projection, element de conception et support de securite
JP2009258701A (ja) * 2008-03-28 2009-11-05 Sanyo Electric Co Ltd 投写型映像表示装置

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Publication number Priority date Publication date Assignee Title
JP2014164197A (ja) * 2013-02-26 2014-09-08 Nikon Corp スクリーンおよび投射システム
CN104766928A (zh) * 2014-01-06 2015-07-08 三星显示有限公司 有机发光二极管显示面板及其制造方法
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JP2017201418A (ja) * 2017-07-13 2017-11-09 株式会社ニコン スクリーンおよび投射システム

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