JPH07181597A - Lenticular screen for projection - Google Patents

Abstract

PURPOSE:To make observation possible without degrading the contrast of images even if interior light and external light exist on an observation point side by coloring a lenticular screen including a transmittable light diffusive layer to a transparent dark color tone. CONSTITUTION:The main body of this lenticular screen Lt is colored to the transparent dark color system. The transmittable light diffusive layer D is formed on the flat surface F of the rear surface and is also colored to the transparent dark color system. Even if the interior light and the external light exist on the observation side, much of the reflected light is absorbed by the coloration of the dark color system of the lenticular screen before the interior light and external light are made incident on the lenticular screen, are reflected by the light diffusive layer and are emitted again to the observation side. The reflection of these rays to the observation side by the light diffusive layer of the lenticular screen to brighten the dark luminance in the shadow parts of the projected images does not arise. As a result, the degradation in the contrast is prevented and the observation with high contrast is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lenticular screen used for a stereoscopic image display using a polarizing filter and a lenticular screen for stereoscopic viewing without stereoscopic glasses using the polarizing filter. The present invention relates to a transmissive projection lenticular screen for projecting light.

[0002]

2. Description of the Related Art A stereoscopic image display for stereoscopic viewing without stereoscopic glasses is generally a lenticular screen (also known as a lenticular lens sheet, a lenticular lens, a lenticular sheet, etc.).
Stripe-shaped stereoscopic pixels are arranged on the lens back surface (flat surface) opposite to the striped lens surface so that a stereoscopic image can be observed when observed from the lens surface side.

As a method of arranging pixels for stereoscopic vision on the back surface side of the lenticular screen, printing paper by a printing method,
A printed pixel sheet arrangement method using a printed pixel sheet in which stereoscopic pixels are printed on a sheet such as a transparent film, or a photographic pixel sheet arrangement method in which stereoscopic pixels are image-formed on a photographic film or photographic paper by a photographic method, or Further, when a relatively large screen (for example, a diagonal size of 30 inches or more) is required, an LCD (liquid crystal display) projector, a CRT (fluorescent tube) projector, a photographic image projection are provided on the back side of the lenticular screen. There is a projection arrangement method in which a projector (optical image projector) such as a projector is arranged to project stereoscopic pixels having a left-right parallax.

FIG. 5 (a) is a schematic diagram for explaining an example of a projection arrangement method by a conventional LCD projector, in which one LCD projector P for projecting left eye pixels and right eye pixels at a time is used. The projection pixels are projected onto the projection lenticular screen Lt. Figure 5 (a)
As shown in FIG. 5, the lenticular screen Lt has a large number of lenses La each having a striped cylindrical convex curved surface on the surface side thereof arranged in parallel in a striped pattern.
The opposite back surface is a flat surface, and a fine uneven rough surface (embossed rough surface, rough surface by sandblasting) or a light diffusing agent (fine powdery diffusing agent such as kaolin) is applied or mixed. The light diffusing layer D is provided.

A subject S is photographed from the left and right by a video camera Ca for photographing a stereoscopic image (for example, two left-eye cameras CaL and right-eye cameras CaR), and each is photographed by a left-eye camera CaL. The captured image signal and the captured image signal captured by the right-eye camera CaR are recorded and reproduced by the respective image recording / reproducing devices V (video recording / reproducing devices), and the left-eye image signal and the right image signal that are reproduced and output, respectively. The eye image signal is input to the stereoscopic pixel signal processing circuit C to form striped stereoscopic pixel signals for the left and right eyes.

The stereoscopic pixel signal is output to a light-transmissive image display panel section Lc (hereinafter simply referred to as an LCD panel section) of an LCD (liquid crystal image display) installed in the projector P for projecting a liquid crystal display image. By driving the scanning electrode plates and the signal electrode plates facing each other of the LCD panel section Lc to change the orientation of the liquid crystal enclosed between the electrodes, the stripe-shaped stereoscopic pixels are visible in the panel section Lc. Output and display as pixels. The visible pixels for stereoscopic vision displayed on the panel portion Lc are illuminated by an illumination light source L provided on the rear surface side of the panel portion Lc, enlarged by an optical lens Ls provided on the front surface side of the panel portion Lc, and lenticular. The light spot having no directivity is formed by being enlarged and projected on the light diffusing layer D on the back surface of the screen Lt, and is observed as a stereoscopic image from the observation point O from the front surface side.

FIG. 5 (b) is a schematic view for explaining another example of the projection arrangement method by the conventional LCD projector,
Projecting left-eye pixels and right-eye pixels separately 2
This is for projecting stereoscopic pixels on the projection lenticular screen Lt by using the LCD projector P of the table. As shown in FIG. 5B, the lenticular screen Lt has a shape in which the front lenticular screen LtF on the observation point O side and the rear lenticular screen LtR having the same shape as the front lenticular screen LtF are overlapped on their flat surface sides. Used. On the front surface side of the front lenticular screen LtF, a large number of lenses La having stripe-shaped cylindrical convex convex surfaces are arranged in parallel in a stripe shape, and the opposite back surface is a flat surface. The flat surface and the rear lenticular screen L
The flat surface of tR is overlapped, and the inner surface of the overlap is
The light diffusing layer D is provided with a fine uneven rough surface (embossed uneven rough surface, rough surface formed by sandblasting) or a light diffusing agent (fine powdery diffusing agent such as kaolin) applied or mixed therein.

A subject S is photographed from the left and right by a video camera Ca for photographing a stereoscopic image (for example, two left-eye cameras CaL and right-eye cameras CaR), and each is photographed by a left-eye camera CaL. The captured image signal and the captured image signal captured by the right-eye camera CaR are recorded and reproduced by the respective image recording / reproducing devices V (video recording / reproducing devices), and the left-eye image signal and the right image signal that are reproduced and output, respectively. The eye image signal is input to the stereoscopic pixel signal processing circuit C to form striped stereoscopic pixel signals for the left and right eyes.

The left-eye and right-eye stereoscopic pixel signals are separately provided from the stereoscopic pixel signal processing circuit C to the left-eye projector PL and the right-eye projector PR of the liquid crystal display image projection projector P. Each LCD (liquid crystal image display) is output to the light-transmissive image display panel section Lc (hereinafter simply referred to as LCD panel section), and the scanning electrode plates facing each other of the LCD panel section Lc and the signal electrode plates facing the scanning electrode plates. Is driven to change the orientation of the liquid crystal sealed between the electrodes, and the stripe-shaped stereoscopic pixels are output and displayed as visible pixels on the panel portion Lc. The visible pixels for stereoscopic vision displayed on the panel unit Lc are
c Illuminated by an illumination light source L provided on the rear surface side, magnified by an optical lens Ls provided on the front surface side of the panel portion Lc, and the lens La on the rear lenticular screen LtR.
A light spot having no directivity is formed by being incident from the side and being projected on the light diffusing layer D, and is observed as a stereoscopic image by the observation point O from the surface side of the front lenticular screen LtF.

In FIG. 6, a stripe-shaped stereoscopic pixel G displayed on the LCD panel portion Lc is enlarged and projected as a left-eye pixel and a right-eye pixel by the projector P on the light diffusing layer D of the lenticular screen Lt. FIG. 3 is a schematic plan view showing a state and showing a relationship between a pixel pitch width PG of a stereoscopic pixel G and a lens pitch width PL of a lenticular screen Lt.

LCD panel section Lc in projector P
Are formed by regularly arranging independent liquid crystal cells (cells in which liquid crystal is enclosed, for example, fine cells having a quadrangular planar shape) between the opposing electrode plates in the vertical and horizontal directions. The stereoscopic pixels G enlarged and projected on the back surface of the lenticular screen Lt are, as shown in FIG. 6, quadrangular left eye pixels GL and right eye pixels GR displayed by respective liquid crystal cells.
Composed of and. The left-eye pixels GL and the right-eye pixels GR are alternately arranged in multiple rows in parallel to the stripe line direction of each lens La of the lenticular screen Lt, and the left-eye pixels are adjacent to each other. Pixel GL
And the right-eye pixel GR form a pixel pitch width PG of the stereoscopic pixel G. The difference in pixel pitch width PG of the stereoscopic pixels G from the lens pitch width PL of the lenticular screen Lt is 0 (or 0 or more and 1 pitch or less,
Desirably, a stereoscopic view is made by enlarging and projecting so as to match with a predetermined difference within a range of 0 to 0.5 pitch, and observing from an observation point O through the lenticular screen Lt.

The contrast of the stereoscopic image observed through the lenticular screen Lt is the highlight of the stereoscopic image which is enlarged and projected by the illumination light (direct illumination light and indirect illumination light such as a condenser plate) from the illumination light source L. It is determined by the ratio of the bright brightness of the area and the dark brightness of the shadow area. Bright brightness of the above-mentioned highlight part is lenticular screen L
When there are no light bodies (self-luminous body and reflected light body) around the t main body and the projector P main body and their surroundings, it is determined by the brightness of the illumination light source L of the projector, and the dark brightness of the shadow portion is the lenticular screen Lt main body and the projector P main body. And the dark brightness of the dark body including their surroundings.

[0013]

However, when there is room light or outside light on the observation point O side, those rays are incident from the surface of the projection lenticular screen Lt and the surface of the screen or the light diffusing layer. As a result of being reflected by D and brightening the dark luminance in the shadow portion of the projected image, the contrast is lowered.

It is an object of the present invention to enable high-contrast observation without lowering the contrast of an image even when room light or outside light exists on the observation point O side.

[0015]

The first aspect of the present invention is to provide a transparent light diffusing layer D on the back surface of the lenticular screen Lt.
In the projection lenticular screen Lt including the above, the projection lenticular screen Lt including the transparent light diffusing layer D is colored in a transparent dark color tone.

A second aspect of the present invention is a projection lenticular screen Lt having a transparent light diffusing layer D on the back surface of the lenticular screen Lt, wherein the lenticular screens other than the transparent light diffusing layer D are transparent dark system. It is a lenticular screen for projection characterized by being colored in a color tone.

The third aspect of the present invention is a projection lenticular screen Lt having a transparent light diffusing layer D on the back surface of the lenticular screen Lt, wherein the lens La surface of the lenticular screen Lt is colored in a transparent dark color tone. Is a lenticular screen for projection.

The fourth aspect of the present invention is the front lenticular screen LtF and the rear lenticular screen Lt.
In a lenticular screen Lt for projection having a shape in which the back surfaces of tR and the transparent light diffusing layer D are superposed on each other, and the transparent light diffusing layer D is included in the front surface. Lenticular screen L
The projection lenticular screen is characterized in that tF or both front and rear lenticular screens LtF and LtR are colored in a transparent dark color tone.

The fifth aspect of the present invention is the front lenticular screen LtF and the rear lenticular screen Lt.
In a projection lenticular screen Lt having a shape in which the back surfaces of tR and the transparent light diffusing layer D are superposed on each other, and the transparent light diffusing layer D is removed from the front surface. Lenticular screen L
The projection lenticular screen is characterized in that tF or both front and rear lenticular screens LtF and LtR are colored in a transparent dark color tone.

The sixth aspect of the present invention is the front lenticular screen LtF and the rear lenticular screen Lt.
In the projection lenticular screen Lt having a shape in which tR and the back surfaces thereof are superposed on each other and having a transparent light diffusing layer D on the inner surface thereof, the lens La surface of the front lenticular screen LtF has a transparent dark color. It is a lenticular screen for projection, characterized by being colored tones.

According to a seventh aspect of the present invention, a transparent light diffusing plate K is superposed on the rear surface of the front lenticular screen LtF with a frame H interposed between the rear surface of the lenticular screen LtF and the transparent light diffusing plate K. A projection lenticular screen Lt having a space portion M, wherein the front lenticular screen LtF is colored in a transparent dark color tone, which is a projection lenticular screen Lt.

Further, in the eighth aspect of the present invention, a transparent light diffusing plate K is superposed on the rear surface of the front lenticular screen LtF via a frame H, and the rear surface of the lenticular screen LtF and the transparent light diffusing plate K are interposed. A projection lenticular screen Lt having a space M, wherein the front surface of the lens L a of the front lenticular screen LtF is colored in a transparent dark color tone.

The ninth aspect of the present invention is the front lenticular screen LtF and the rear lenticular screen Lt.
The rear surfaces of tR are opposed to each other, the transparent light diffusion plate K is provided on the inner surface thereof, and the frames H and H are provided on the front and back surfaces of the diffusion plate K, respectively.
Lenticular screen L
A projection lenticular screen Lt having a space M between the tF and the rear lenticular screen LtR, wherein the front lenticular screen LtF is colored in a transparent dark color tone. is there.

In the tenth aspect of the present invention, the front surface of the front lenticular screen LtF and the rear surface of the lenticular screen LtR are opposed to each other, and the transparent light diffusing plate K is provided on the inner surface of the opposing surface and the diffusing plate K is provided on the front and back surfaces thereof, respectively. The lenticular screen Lt for projection having a space M between the front lenticular screen LtF and the rear lenticular screen LtR which are superposed through the frames H and H.
The surface of the lens La of the front lenticular screen LtF is colored with a transparent dark color tone, which is a projection lenticular screen.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The projection lenticular screen Lt of the first invention of the present invention will be described in detail below with reference to the external perspective view of FIG. As shown in FIG. 1A, the lenticular screen Lt according to the first aspect of the invention has cylindrical (lens-shaped) lenses La arranged on the front surface in parallel multiple rows and a flat portion F on the back surface. The parallel light rays incident on the lens La are focused on the flat portion F and focused or almost focused.

The main body of the lenticular screen Lt is made of a transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and is colored in a transparent dark color. The flat surface F on the back surface of the projection lenticular screen Lt
Is formed with a light transmissive light diffusing layer D. The light diffusing layer D may be a fine uneven rough surface obtained by molding the flat surface F (back surface) of the screen Lt main body by an embossing method using a sandblast method or a mold, or on the back surface of the screen Lt. The flat surface F may be laminated with a light diffusing synthetic resin film (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) mixed with a powdery light diffusing agent such as kaolin or silica, or It may be applied with a synthetic resin solution (a resin solution of polyvinyl chloride, polymethylmethacrylate, styrene, etc.) mixed with a light diffusing agent.

The light diffusing layer D is formed by laminating the flat surface F of the screen Lt itself or a transparent synthetic resin or glass as a separate body. The light diffusing layer D is also colored in a transparent dark color. The dark color includes black, dark blue, dark red, dark green, and other dark color tones, and is colored with a dye or pigment having any of the above color tones. Means

Next, the projection lenticular screen Lt of the second invention will be described in detail below with reference to the external perspective view of FIG. 1 (b). The lenticular screen Lt of the second invention shown in FIG. 1 (b) has cylindrical (Lambda-shaped) lenses La arranged on the front surface in parallel and in the same manner as the first invention, and has a flat surface F on the back surface. The parallel light rays incident on the lens La are focused on the flat surface F and focused or almost focused. Also, as in the first aspect of the present invention, a flat surface F (rear surface) of the screen is formed on the flat surface F of the rear surface by a sandblasting method or an embossing method using a die, or a fine uneven rough surface, or a powder of kaolin, silica or the like. The light diffusing layer D is formed by a light diffusing powder-mixed layer having a body-shaped light diffusing agent mixed on the back surface, or a coating layer coated with a synthetic resin liquid containing the light diffusing powder. There is.

The lenticular screen Lt according to the second aspect of the present invention is formed of transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and the screen Lt main body other than the light diffusing layer D is transparent. It is dark-colored and the light diffusing layer D is not dark-colored and has a white color tone due to the light diffusing property, but is not colored. The dark coloring means coloring with a dye or pigment having a dark color tone such as black, dark blue, dark red or dark green.

Next, the projection lenticular screen Lt of the third invention will be described in detail below with reference to the external perspective view of FIG. 1 (c). The lenticular screen Lt of the third invention is similar to the first invention shown in FIG. 1 (a) and the second invention shown in FIG. 1 (b), and has a cylindrical lens (La) in a parallel multi-row structure on the surface. The flat surface F is provided on the back surface. The parallel rays incident on the lens La are flat surfaces F
The light is focused on and focused on or almost focused.

The lenticular screen Lt according to the third aspect of the present invention is formed of a colorless transparent or almost colorless transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and the light diffusing layer D is also the same. It is not colored but has a white color tone due to light diffusivity, but is not colored. Further, in the lenticular screen Lt main body of the third invention, the screen flat surface F (rear surface) is finely formed on the flat surface F of the back surface by an embossing method using a sand blast method or a mold, as in the first or second invention. A light-diffusing synthetic resin film (polyvinyl chloride, polymethylmeta) in which a rough surface is formed or a flat surface F (back surface) of the screen is mixed with a powdery light diffusing agent such as kaolin or silica. Acrylate,
The light diffusing layer D is formed by laminating styrene or the like) or by applying a synthetic resin liquid (a resin liquid such as polyvinyl chloride, polymethylmethacrylate, or styrene) mixed with the light diffusing agent. . In the lenticular screen Lt of the third invention, as shown in FIG. 1 (c), the surface of the lens La is colored with a transparent dark color so as not to impair the lens shape, and the transparent dark color layer B is provided. Are formed. The dark colors are black colors,
It includes dark color tones such as dark blue, dark red, and dark green.

Next, the lenticular screen Lt of the fourth invention will be described in detail below with reference to the external perspective view of FIG. As shown in FIG. 2A, the projection lenticular screen Lt of the fourth invention includes a front lenticular screen LtF (a lenticular screen on the observation point O side) and a rear lenticular screen LtR (a lenticular screen on the projector P side). Has a shape in which the back surfaces (flat surfaces F) thereof are overlapped with each other. The front lenticular screen LtF and the rear lenticular screen LtR have cylindrical (Lambda-shaped) lenses La arranged in parallel in multiple rows on the front surface and a flat surface F on the back surface, as in the first invention. Lens La
The parallel rays incident on the light source are focused on the flat surface F and are focused or substantially focused.

As shown in FIG. 2A, the front lenticular screen LtF in the lenticular screen Lt of the fourth invention is formed of transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass. The transparent lenticular screen LtR, which is transparent and dark colored, is molded with transparent synthetic resin (resin liquid such as polyvinyl chloride, polymethylmethacrylate, styrene) or glass, and is colorless or almost colorless and transparent. is there. The dark-colored coloring is a coloring in a dark-colored tone using a black-based, dark blue-based, dark red-based, dark green-based dye or pigment.

As shown in FIG. 2A, the front lenticular screen LtF and the rear lenticular screen Lt.
A light transmissive diffusive layer D is formed on the inner surface superposed with tR. Like the front lenticular screen LtF, the light diffusing layer D is colored in a dark color tone using a dye or pigment such as black, dark blue, dark red or dark green. The light-diffusing layer D is a finely rough surface obtained by molding a screen flat surface F on the back surface of the front lenticular screen LtF by a sandblasting method or an embossing method using a mold, or a screen flat surface on the back surface of the rear lenticular screen LtR. The surface F is formed by a fine uneven rough surface obtained by molding the surface F by a sandblasting method or an embossing method using a mold and coloring it in a transparent dark color tone. Alternatively, either the front lenticular screen LtF or the rear lenticular screen LtR, the back screen flat surface F, is mixed with a powdery light diffusing agent such as kaolin or silica and a dark colorant (dye or pigment) to obtain a light diffusing property. It is formed by a laminate layer laminated with a resin film or a coating layer coated with a synthetic resin liquid. In the projection lenticular screen Lt of the fourth invention, the rear lenticular screen Lt is the same as the front lenticular screen LtF.
tR may be colored in a transparent dark color tone.

Next, the projection lenticular screen Lt of the fifth invention will be described in detail below with reference to the external perspective view of FIG. The lenticular screen Lt of the fifth invention is, as shown in FIG.
Similarly to (a)), front lenticular screen LtF (lenticular screen on observation point O side)
And a rear lenticular screen LtR (a lenticular screen on the side of the projector P) have their back surfaces (flat surfaces F) overlapped with each other.

The front lenticular screen LtF and the rear lenticular screen LtR have cylindrical (Lambda-shaped) lenses La arranged in parallel on the front surface in multiple rows and have a flat surface F on the back surface, as in the first invention.
The parallel light rays incident on the lens La are focused on the flat surface F and focused or almost focused.

As shown in FIG. 2 (b), the front lenticular screen LtF in the lenticular screen Lt of the fifth invention is formed of transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass. The transparent, dark-colored rear lenticular screen LtR is made of transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass and is colorless or almost colorless. The dark-colored coloring is a coloring in a dark-colored tone using a black-based, dark blue-based, dark red-based, dark green-based dye or pigment.

As shown in FIG. 2B, the front lenticular screen LtF and the rear lenticular screen Lt.
A light transmissive diffusive layer D is formed on the inner surface superposed with tR. The light diffusing layer D is transparent or almost colorless, and the fine surface roughness obtained by molding the screen flat surface F on the back surface of the rear lenticular screen LtR by the sandblast method or the embossing method using a mold. Formed by the surface. Alternatively, either the front lenticular screen LtF or the rear lenticular screen LtR, the back screen flat surface F is laminated with a light diffusing resin film mixed with a powdery light diffusing agent such as kaolin or silica, or a kaolin, It is formed by a coating layer coated with a light diffusing synthetic resin liquid mixed with a powdery light diffusing agent such as silica. In the projection lenticular screen Lt of the fifth aspect of the invention, the rear lenticular screen LtR may be colored in a transparent dark color tone, like the front lenticular screen LtF.

Next, the projection lenticular screen Lt of the sixth invention will be described in detail below with reference to the external perspective view of FIG. The lenticular screen Lt of the sixth invention is, as shown in FIG.
(See (a)) or the fifth invention (see FIG. 2 (b)), the front lenticular screen LtF (lenticular screen on the observation point O side) and the rear lenticular screen LtR (lenticular screen on the projector P side) Is a shape in which the back surfaces (flat surfaces F) thereof are overlapped with each other.

The front lenticular screen LtF and the rear lenticular screen LtR have cylindrical (Lambda-shaped) lenses La arranged in parallel on the front surface in multiple rows and have a flat surface F on the back surface, as in the first invention.
The parallel light rays incident on the lens La are focused on the flat surface F and focused or almost focused. Figure 2
As shown in (c), the front lenticular screen L in the lenticular screen Lt of the sixth invention is
tF is molded from a transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and is colored by forming a transparent colored layer B having a dark color tone on the surface of the lens La. The coloring layer B is formed so as not to impair the shape of the lens La, and the coloring layer B is laminated and formed at the same time as the lens forming of the front lenticular screen LtF, or the coloring agent is directly applied to the surface of the lens La after forming. The colored layer B may be formed by forming. The rear lenticular screen LtR is made of transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and is colorless or almost colorless. The dark-colored coloring is a coloring in a dark-colored tone using a black-based, dark blue-based, dark red-based, dark green-based dye or pigment.

As shown in FIG. 2C, the front lenticular screen LtF and the rear lenticular screen Lt.
A light transmissive diffusive layer D is formed on the inner surface superposed with tR. The light diffusing layer D is transparent or almost colorless, and the fine surface roughness obtained by molding the screen flat surface F on the back surface of the rear lenticular screen LtR by the sandblast method or the embossing method using a mold. Formed by the surface. Alternatively, either the front lenticular screen LtF or the rear lenticular screen LtR, the back flat screen F is laminated with a light diffusing resin film mixed with a powdery light diffusing agent such as kaolin or silica, or kaolin, It is formed by a coating layer coated with a light diffusing synthetic resin liquid mixed with a powdery light diffusing agent such as silica.

Next, the projection lenticular screen Lt of the seventh invention will be described in detail below with reference to the external perspective view of FIG. As shown in FIG. 3 (a), the lenticular screen Lt of the seventh invention has a peripheral edge portion of the screen LtF on the back surface (flat surface F) side of the front lenticular screen LtF (the lenticular screen on the observation point O side). Via a frame body H having a shape (rectangular shape)
The light-transmitting diffusion plate K is superposed. The overlapping surfaces are connected and fixed by an appropriate fixing method such as an adhesive or a screw.

The front lenticular screen LtF shown in FIG. 3 (a) is made of transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and is colored in a transparent dark color tone. ing. The light-transmitting diffuser plate K is formed of uncolored transparent glass or synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) and is formed by a sandblast method or an embossing method using a mold. It is formed by the obtained fine uneven rough surface. Alternatively, the light-transmitting diffuser plate K is made by mixing powdered light diffuser such as kaolin and silica into uncolored transparent glass or synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.). It may be formed into a plate shape or a film shape, or it may be a transparent glass or synthetic resin plate or film (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) that is not colored and may be powdered with light such as kaolin or silica. It may be laminated with a light-diffusing resin film mixed with a diffusing agent, or light that is mixed with a powdery light diffusing agent such as kaolin or silica in uncolored transparent glass or synthetic resin plate or film. It is also possible to apply a diffusible synthetic resin solution (a resin solution of polyvinyl chloride, polymethylmethacrylate, styrene, etc.). The frame H is
It is formed of a synthetic resin or a metal such as aluminum, but the material is not particularly limited.

In the lenticular screen Lt of the seventh invention, the frame H forms a space M between the front surface of the front lenticular screen LtF (flat surface F) and the diffusion plate K, and inside the lenticular screen Lt, It has a refractive index in air different from that of the screen system.

Next, the projection lenticular screen Lt of the eighth invention will be described in detail below with reference to the external perspective view of FIG. 3 (b). As shown in FIG. 3 (b), the lenticular screen Lt of the eighth aspect of the invention has a peripheral edge portion of the screen LtF on the back surface (flat surface F) side of the front lenticular screen LtF (lenticular screen on the observation point O side). Via a frame body H having a shape (rectangular shape)
The light-transmitting diffusion plates K are superposed, and the superposed surfaces are connected and fixed by an appropriate fixing method such as an adhesive or a screw.

The front lenticular screen LtF shown in FIG. 3 (b) is formed of transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and the surface of the lens La is a transparent dark system. It is colored by the colored layer B having the color tone. The light-transmissive diffuser plate K is a transparent glass or synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) that is not colored.
Is formed by a sandblasting method or an embossing method using a die, and is formed by a finely roughened rough surface. Alternatively, a light-transmitting diffusion plate K
Is uncolored transparent glass or synthetic resin, kaolin,
It may be formed into a plate shape or a film shape by mixing a powdery light diffusing agent such as silica, or an uncolored transparent glass or synthetic resin plate or film (polyvinyl chloride,
Polymethylmethacrylate, styrene, etc.) may be laminated with a light diffusing resin film mixed with a powdery light diffusing agent such as kaolin or silica, or uncolored transparent glass or synthetic resin plate or The film may be coated with a light diffusing synthetic resin liquid (a resin liquid such as polyvinyl chloride, polymethylmethacrylate, or styrene) in which a powdery light diffusing agent such as kaolin or silica is mixed. The frame H is made of synthetic resin or metal such as aluminum, but the material is not particularly limited.

In the lenticular screen Lt of the eighth invention, the frame H forms a space M between the back surface (flat surface F) of the front lenticular screen LtF and the diffusion plate K, and inside the lenticular screen Lt, It has a refractive index in air different from that of the screen system.

Next, the projection lenticular screen Lt of the ninth invention will be described in detail below with reference to the external perspective view of FIG. 4 (a). As shown in FIG. 4 (a), the lenticular screen Lt of the ninth invention is such that the front surface of the lenticular screen LtF (the lenticular screen on the observation point O side) and the rear surface of the lenticular screen LtR are opposed to each other, and A light-transmitting diffuser plate K is arranged in the facing interval, and frames H and H are arranged on the front and back sides of the diffuser plate K, respectively, and they are superposed, and the superposed surfaces are appropriately fixed with an adhesive or screws. It is the one that is connected and fixed by the method.

The front lenticular screen LtF shown in FIG. 4 (a) is made of transparent synthetic resin or glass and is colored in a transparent dark color tone. The rear lenticular screen LtR is made of transparent uncolored synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass.
The light-transmitting diffuser plate K is formed of uncolored transparent glass or synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) and is formed by a sandblast method or an embossing method using a mold. It is formed by the obtained fine uneven rough surface. Alternatively, the light-transmitting diffuser plate K is made of uncolored transparent glass or synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.).
May be formed into a plate or a film by mixing a powdery light diffusing agent such as kaolin or silica, or an uncolored transparent glass or synthetic resin plate or film (polyvinyl chloride, polymethyl chloride) (Methacrylate, styrene, etc.) may be laminated with a light diffusing resin film in which a powdery light diffusing agent such as kaolin or silica is mixed, or uncolored transparent glass or synthetic resin plate or film ( A light diffusing synthetic resin liquid (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) in which a powdery light diffusing agent such as kaolin, silica, etc. is mixed with polyvinyl chloride, polymethylmethacrylate, styrene, etc. A resin liquid) may be applied. The frame H is made of synthetic resin or metal such as aluminum, but the material is not particularly limited.

The lenticular screen Lt of the ninth aspect of the invention is diffused by the frame H between the front surface of the front lenticular screen LtF (flat surface F) and the diffusion plate K, and between the rear surface of the lenticular screen LtR (flat surface F). Spaces M, M are formed between the plate K and the plate K, and the inside of the lenticular screen Lt has a refractive index in air different from that of the screen system.

Next, the projection lenticular screen Lt of the tenth invention will be described in detail below with reference to the external perspective view of FIG. 4 (b). As shown in FIG. 4 (b), the lenticular screen Lt of the tenth invention has a front lenticular screen LtF (a lenticular screen on the observation point O side) and a rear lenticular screen LtR, the back surfaces of which are opposed to each other. A light-transmitting diffuser plate K is arranged in the facing interval, and frames H and H are arranged on the front and back sides of the diffuser plate K, respectively, and they are superposed, and the superposed surfaces are appropriately fixed with an adhesive or screws. It is the one that is connected and fixed by the method.

The front lenticular screen LtF shown in FIG. 4 (b) is made of a transparent synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass, and the surface of the lens La is a transparent dark system. It is colored by the colored layer B having the color tone. The rear lenticular screen LtR is made of transparent uncolored synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or glass. The light-transmitting diffuser plate K is formed of uncolored transparent glass or synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) and is formed by a sandblast method or an embossing method using a mold. It is formed by the obtained fine uneven rough surface. Alternatively, a light transmissive diffusion plate K
Is a transparent glass or synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) that is not colored, and is mixed with a powdery light diffuser such as kaolin or silica to form a plate or film. It may be a transparent glass or synthetic resin plate or film without coloring (polyvinyl chloride, polymethylmethacrylate, styrene, etc.)
May be laminated with a light-diffusing resin film (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) mixed with a powdery light-diffusing agent such as kaolin or silica, or uncolored transparent glass. Alternatively, a synthetic resin plate or film (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) mixed with a powdery light diffusing agent such as kaolin or silica is used as a light diffusing synthetic resin liquid (polyvinyl chloride, poly (vinyl chloride)). A resin liquid such as methylmethacrylate or styrene) may be applied. The frame H is
It is formed of a synthetic resin (polyvinyl chloride, polymethylmethacrylate, styrene, etc.) or a metal such as aluminum, but the material is not particularly limited.

The lenticular screen Lt of the tenth aspect of the invention is diffused by the frame H between the front surface of the front lenticular screen LtF (flat surface F) and the diffusion plate K, and between the rear surface of the lenticular screen LtR (flat surface F). Spaces M and M are formed between the plate K and the plate K, and the inside of the lenticular screen Lt has a refractive index in air different from that of the screen system.

[0054]

The first, second, or third invention of the present invention is a projection lenticular screen Lt having a transparent light diffusing layer D on the back surface of the lenticular screen Lt, which is a transparent light diffusing layer D. Since the lenticular screen Lt or the surface of the lens La of the lenticular screen Lt is colored with a transparent dark color tone, the room light or the outside light radiated on the surface of the lens La of the lenticular screen Lt with or without Light is
The light enters from the lens La side of the front surface of the screen Lt and reaches the diffusive layer D, and a part of the light is reflected by the surface of the diffusive layer D and emitted again to the front surface of the screen Lt. The projection light is
Since the light is transmitted through the lenticular screen Lt once and emitted to the viewing side, the lenticular screen Lt or the lens La surface of the lenticular screen Lt is darkened and the amount of light is absorbed by one time. Although only the attenuation, the room light and the outside light incident on the lenticular screen Lt are reflected by the light diffusing layer D, and the lenticular screen Lt is reflected by the light.
The room light and the outside light are absorbed by the lenticular screen Lt or the dark color tone colored on the surface of the lens La of the lenticular screen Lt twice, because the light is transmitted by the second transmission and emitted to the observation side. Since the light amount is greatly attenuated, the contrast of the projected image can be increased.

In the fourth, fifth, or sixth invention of the present invention, the front lenticular screen LtF and the rear lenticular screen LtR have a shape in which the back surfaces of the lenticular screen LtR are superposed on each other and are transmitted to the superposed inner surface. A lenticular screen Lt for projection having a light-diffusing layer D, the front lenticular screen LtF or the front-back lenticular screens LtF, LtR, or the front lenticular screen, with or without the transmissive light-diffusing layer D. Since the surface of the lens La of the LtF is colored in a transparent dark color tone, the room light and the external light applied to the surface of the lens La of the lenticular screen Lt are incident from the lens La side of the front surface of the screen Lt and diffused. Reaching the diffusive layer D, a part of the light is reflected by the surface of the diffusive layer D, and is again reflected. It is injected into over emissions Lt front.
Since the projection light is transmitted by passing through the lenticular screen Lt once and is emitted to the observing side for observation, the projection light is observed once by the dark color tone colored on the lenticular screen Lt or the lens La surface of the lenticular screen Lt. Although only the light amount is attenuated by absorption, the room light and the outside light incident on the lenticular screen Lt are reflected by the light diffusing layer D, transmitted through the lenticular screen Lt twice and emitted to the observation side. Therefore, the room light and the outside light are lenticular screen Lt,
Alternatively, the dark color tone that is colored on the surface of the lens La of the lenticular screen Lt absorbs the light twice and the light amount is attenuated, so that the contrast of the projected image can be increased.

In the seventh or eighth aspect of the present invention, the transparent light diffusing plate K is superposed on the rear surface of the front lenticular screen LtF via the frame H, and the rear surface of the lenticular screen LtF and the transparent light diffusing plate K are stacked. And the space M
A lenticular screen Lt for projection provided with: The lens La surface of the front lenticular screen LtF or the front lenticular screen LtF is colored with a transparent dark color tone, so that the surface of the lens La of the lenticular screen Lt is irradiated. The room light and the outside light are incident from the lens La side on the front surface of the screen Lt and reach the diffusive layer D, and a part of the light is reflected on the surface of the diffusive layer D and is emitted to the front surface of the screen Lt again. . Since the projection light is transmitted by passing through the lenticular screen Lt once and emitted to the observation side, the lenticular screen Lt or the lenticular screen Lt is observed.
1 due to the dark color tone that is colored on the lens La surface
Although only the amount of light is attenuated by the absorption of light once, the room light and the outside light incident on the lenticular screen Lt are reflected by the light diffusing layer D to be reflected by the lenticular screen Lt.
The room light and the outside light are absorbed by the lenticular screen Lt or the dark color tone colored on the surface of the lens La of the lenticular screen Lt twice, because the light is transmitted through the light and is emitted to the observation side. As a result, the amount of light is attenuated and the contrast of the projected image can be increased.

The ninth or tenth invention of the present invention is
The front surface of the front lenticular screen LtF and the rear surface of the rear lenticular screen LtR are opposed to each other, and the transparent light diffusing plate K and the front and rear surfaces of the diffusing plate K are superposed on the inner surfaces of the opposing surfaces through the frame bodies H and H, respectively. A projection lenticular screen L having a space M between LtF and the rear lenticular screen LtR
Since the front surface of the lenticular screen LtF or the surface of the lens La of the front lenticular screen LtF is colored with a transparent dark color tone, the room light or the external light applied to the surface of the lens La of the lenticular screen Lt is The light enters from the lens La side of the front surface of the screen Lt and reaches the diffusive layer D, and a part of the light is reflected by the surface of the diffusive layer D and emitted again to the front surface of the screen Lt.
Since the projection light is transmitted by passing through the lenticular screen Lt once and is emitted to the observing side for observation, the projection light is observed once by the dark color tone colored on the lenticular screen Lt or the lens La surface of the lenticular screen Lt. Although only the amount of light is attenuated by absorption, the room light and the outside light incident on the lenticular screen Lt are reflected by the light diffusing layer D, transmitted through the lenticular screen Lt twice and emitted to the observation side. Therefore, the room light and the outside light are lenticular screen Lt,
Alternatively, the dark color tone that is colored on the surface of the lens La of the lenticular screen Lt absorbs the light twice and the light amount is attenuated, so that the contrast of the projected image can be increased.

[0058]

The projection lenticular screen of the present invention allows the room light and the outside light to enter the lenticular screen and be reflected by the light diffusing layer even when the room side and the outside light exist on the observation side. Most of the reflected light is absorbed by the dark coloration of the lenticular screen before being emitted to the viewing side again, and these light rays are reflected to the viewing side by the light diffusing layer of the lenticular screen to form a projected image. The dark brightness in the shadow portion is not increased, and as a result, it is possible to prevent a decrease in contrast and to observe with high contrast.

[Brief description of drawings]

1A is an external perspective view of a projection lenticular screen of the first invention, FIG. 1B is an external perspective view of a projection lenticular screen of the second invention, and FIG. 1C is a projection lenticular screen of the third invention. FIG.

2A is an external perspective view of a projection lenticular screen of the fourth invention, FIG. 2B is an external perspective view of a projection lenticular screen of the fifth invention, and FIG. 2C is a projection lenticular screen of the sixth invention. FIG.

FIG. 3A is an external perspective view of the projection lenticular screen of the seventh invention, and FIG. 3B is an external perspective view of the projection lenticular screen of the eighth invention.

FIG. 4A is an external perspective view of the projection lenticular screen of the ninth invention, and FIG. 4B is an external perspective view of the projection lenticular screen of the tenth invention.

5A is a system block diagram illustrating an example of a stereoscopic image projection system using a conventional projection lenticular screen, and FIG. 5B is a diagram illustrating another example of a conventional stereoscopic image projection system using a projection lenticular screen. It is a system block diagram.

FIG. 6 is a schematic plan view illustrating a relationship between a projection lenticular screen and a projection pixel in a general stereoscopic image projection system.

[Explanation of symbols]

Lt ... Lenticular screen for projection La ... Lens PL ... Lens pitch width F ... Flat surface D ... Transparent light diffusing layer B ... Coloring layer LtF ... Front lenticular screen LtR ... Rear lenticular screen H ... Frame K ... Transparent light diffusion Plate M ... Space O ... Observation P ... Projector S ... Subject L ... Illumination light source Ls ... Projection lens Lc ... LCD panel C ... Stereoscopic pixel signal processing circuit V
... Recording / reproducing device Ca ... Shooting camera G ... Stereoscopic pixel GL ... Left eye pixel GR ... Right eye pixel

Claims (10)

[Claims] 1. A lenticular screen Lt for projection having a transparent light diffusing layer D on the back surface of the lenticular screen Lt, wherein the lenticular screen Lt including the transparent light diffusing layer D is colored in a transparent dark color tone. A lenticular screen for projection, which is characterized by being 2. A lenticular screen Lt for projection having a transparent light diffusing layer D on the back surface of the lenticular screen Lt, wherein the lenticular screen Lt other than the transparent light diffusing layer D is colored in a transparent dark color tone. A lenticular screen for projection that is characterized. 3. A lenticular screen Lt for projection having a transparent light diffusing layer D on the back surface of the lenticular screen Lt, wherein the lens La surface of the lenticular screen Lt is colored in a transparent dark color tone. Lenticular screen for projection. 4. A projection lenticular screen Lt having a front lenticular screen LtF and a rear lenticular screen LtR whose back surfaces are superposed on each other and which is provided with a transparent light diffusing layer D on the inner surface thereof. The front lenticular screen LtF or the front and rear lenticular screens LtF and LtR including the transparent light diffusing layer D are colored in a transparent dark color tone. 5. A projection lenticular screen Lt having a front lenticular screen LtF and a rear lenticular screen LtR, the back surfaces of which are superposed on each other, and the transmissive light diffusing layer D is provided on the inner surface of the superposed ones. A lenticular screen for projection, characterized in that the front lenticular screen LtF or the front and rear lenticular screens LtF, LtR, except for the transparent light diffusing layer D, are colored in a transparent dark color tone. 6. A projection lenticular screen Lt having a front lenticular screen LtF and a rear lenticular screen LtR, the back surfaces of which are superposed on each other, and the transmissive light diffusing layer D is provided on the inner surface of the superposed ones. , Front lenticular screen LtF
The lenticular screen for projection is characterized in that the surface of the lens La is colored in a transparent dark color tone. 7. A projection having a transparent light diffusing plate K overlaid on the back surface of the front lenticular screen LtF via a frame H and having a space M between the back surface of the lenticular screen LtF and the transparent light diffusing plate K. A lenticular screen Lt for projection, wherein the front lenticular screen LtF is colored in a transparent dark color tone. 8. A projection having a transparent light diffusing plate K overlaid on the back surface of the front lenticular screen LtF via a frame H and having a space M between the back surface of the lenticular screen LtF and the transparent light diffusing plate K. A lenticular screen Lt for projection, wherein the surface of the lens La of the front lenticular screen LtF is colored in a transparent dark color tone. 9. A front lenticular screen LtF and a rear lenticular screen LtR are made to face each other with their back surfaces facing each other, and a transmissive light diffusing plate K is superposed on the inner surface of the facing lenticular screen LtR, and the front and back surfaces of the diffusing plate K are overlaid with frames H, H, respectively. In addition, a projection lenticular screen Lt having a space M between the front lenticular screen LtF and the rear lenticular screen LtR, wherein the front lenticular screen LtF is colored in a transparent dark color tone. Lenticular screen for projection. 10. A front lenticular screen LtF and a rear lenticular screen LtR are made to face each other with their back surfaces facing each other, and a transparent light diffusing plate K and a diffusing plate K are provided on the inner surfaces facing each other.
A projection lenticular screen Lt having a space M between a front lenticular screen LtF and a rear lenticular screen LtR, which are superposed on the front and back through frames H and H, respectively, and the lens La surface of the front lenticular screen LtF is A lenticular screen for projection, which is characterized by being colored in a transparent dark color tone.