JP2012159684A - Stereoscopic image projection screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a windable and foldable silver screen.SOLUTION: In a projection screen formed by stacking a resin layer on a fibrous base material 10, a windable screen is formed by mixing silver-colored metal powder with a resin 11 constituting a resin layer and winding it around a winding core 1; and an air dome screen of a double pneumatic structure retains a dome shape by retaining air between an inner membrane 31 and an outer membrane 32 to a negative pressure or a positive pressure.

Description

  The present invention relates to a 3D image projection screen used when a 3D image is projected from a projector, and more particularly to a silver screen processing in a screen made of a flexible material such as vinyl.

Projecting stereoscopic images from a projector onto a screen is widely performed. This is to perform stereoscopic video display using stereoscopic perception by human binocular parallax, and there are the following means for displaying stereoscopic video by projector projection.
(1) Active type
(A) Time division method (liquid crystal shutter method)
(2) Passive type
(A) Linear polarization method
(B) Circular polarization method
(C) Anaglyph method (colorization is difficult)
(D) Wavelength division method (method that uses an interference filter and divides the three primary colors of light into two parts and divides them into six light regions)

  As described above, there are various methods for displaying stereoscopic images, and stereoscopic glasses worn by the audience are prepared according to the respective methods. In this case, it is desirable that the cost of wearing these glasses is as low as possible in a video display that mobilizes many spectators. In this regard, the production cost of active glasses, in which the left and right eyes are viewed through different liquid crystal shutters through the use of separate liquid crystal shutters, is very high, and is suitable for a large number of video displays. Not.

  On the other hand, the linear and circular polarization methods that use polarized light are cheap because the glasses can be made of paper and plastic polarizing plates. . FIG. 1 illustrates a projection system that performs stereoscopic viewing using polarized light, in which P1 is a right-eye projector, F2 is a right-eye polarizing filter, P2 is a left-eye projector, and F2 is a left-eye projector. Refers to a polarizing filter.

  In this case, the polarized light emitted from the projector must be reflected by the screen S, pass through the polarizing glasses G while maintaining the polarization plane, and be returned to the audience correctly. If the light emitted from the projector is diffused on the screen surface, the polarization plane is rotated and reflected, making stereoscopic viewing impossible. For this reason, the screen S is required to have a specular reflection effect in which the light emitted from the projector is reflected at the same angle as the incident angle. As such, a so-called silver screen having a metallic luster is used.

  The silver screen is manufactured and used by applying a paint mixed with silver metal powder such as aluminum powder to the base of the screen (for example, Patent Document 2).

JP 2004-250909 A JP 2007-178582 A Microfilm filming the contents of the description and drawings attached to the application for the actual application No. 126807

  By the way, when a 3D image facility is constructed so that it can be temporarily installed, or when it is implemented with a simple construction method, the screen on which the 3D image is projected is not a rigid body for ease of transportation and folding, but a flexible material such as vinyl. It is common to be comprised by.

  In addition, in a dome screen facility, an air dome screen (for example, Patent Document 1) that retains a dome shape by blowing air into a dome-shaped film, and an inner film, in order to implement with a simple construction method An air dome screen consisting of a double air film structure that maintains the dome shape by keeping the air between the outer films at negative pressure or positive pressure is also used, and this screen is also made of a flexible material such as vinyl. (For example, Patent Document 3).

  In the above case, the silver screen can be obtained by applying a paint mixed with metal powder to a base made of a flexible material such as vinyl, but there is a problem that the paint has no strength and is easily peeled off. In general, baking coating is performed to increase the strength of the coating film. However, in this case, this means cannot be employed because the base of the screen is not a rigid body and is a resin material such as vinyl.

  In this case, when the screen is fixed in a flat or stretched state as in a permanent building that exclusively shows stereoscopic images, the effect on the coating film is small. However, the reason why the base of the screen is formed of a flexible material such as vinyl is that, for example, as shown in FIG. This is because the facility must be folded and stretched repeatedly for each temporary installation.

  Therefore, in the case of a winding type screen, there is a problem that the coated silver screen cannot be used because the coating film bends due to winding and the wrinkles are peeled off or peeled off. Similarly, even in a temporary video facility, there is a problem that when the film is wound or folded, the coating film bends and the wrinkles are peeled off or peeled off, making it impossible to reuse.

  Therefore, when a stereoscopic image is to be projected in a temporary image display such as an event, the silver screen cannot be taken up in advance or folded and carried in, and it cannot be reused. Caused a problem.

  On the other hand, in the air dome screen facility, even if it is not a temporary facility, when it is carried into the site with the screen folded, the coating film will still bend and the wrinkles will peel off or peel off. Had to be done in the field after installation. Therefore, not only the efficiency is low, but also the accuracy of painting is difficult to take compared to the case of painting in advance at the factory, which may affect the stereoscopic effect. In addition, once installed, there is a problem that it cannot be reused. In addition, the air dome screen keeps the air between the inner film and the outer film at a negative pressure or a positive pressure so that the dome shape is maintained, so if the inner surface of the inner film is painted for silver screen, maintenance, etc. For this reason, if the air film is brought to the same atmospheric pressure as the outside air, the inner film is deformed and the film is bent, and there is a possibility that wrinkles or peeling off. An air dome screen that can be implemented with a simple construction method is useful because it can realize an all-sky movie and a planetarium at an affordable cost, but the fact that it cannot be converted into a stereoscopic image has been a major problem.

  The present invention was created for the purpose of providing a 3D image projection screen that solves the above problems. That is, the stereoscopic image projection screen according to claim 1 is a projection screen in which a resin layer is layered on a fibrous base fabric, and a silver metal powder is mixed with a resin constituting the resin layer. .

  A stereoscopic image projection screen according to claim 2 is a resin layer obtained by mixing silver metal powder on the surface of a screen base member in which a resin layer is layered on a fibrous base fabric in the screen according to claim 1. It is characterized by being layered.

  According to a third aspect of the present invention, the 3D image projection screen is characterized in that the screen according to the first aspect is a winding type screen that can be wound around a winding core.

  The stereoscopic image projection screen according to claim 4 is an air dome screen that retains the dome shape by blowing the screen according to claim 1 into an air film having a dome shape. Features.

  Further, the stereoscopic image projection screen according to claim 5 is configured to keep the screen according to claim 1 in a dome shape by maintaining the air between the inner film and the outer film at a negative pressure or a positive pressure. The air dome screen has a heavy air film structure.

  According to the three-dimensional image projection screen of the present invention having the above-described configuration, silver metal powder is mixed with the resin itself constituting the resin layer to be layered on the base fabric of the screen, instead of applying silver coating. In order to obtain a silver screen, the silver part (resin layer) mixed with silver metal powder and the base fabric are integrated. Therefore, even if the screen is bent or bent, the silver portion is not wrinkled or peeled off. Further, unlike the paint film, the silver portion has a corresponding thickness as a part of the layer constituting the screen, so that the reflection characteristics of the silver screen do not change even if it is damaged by an external force.

  On the other hand, the silver part is not applied later like paint, but is applied at the factory as part of the screen, so there is no need for on-site work such as painting, and the efficiency of implementation is improved, as well as on-site. Compared to the case, the accuracy such as thickness becomes more accurate, and a more reliable stereoscopic effect can be obtained.

  The stereoscopic image projection screen according to claim 2 is obtained by laminating a resin layer obtained by mixing a silver metal powder on the surface of a screen substrate obtained by laminating a resin layer on a fibrous base fabric. Therefore, a silver screen can be easily obtained by using an existing curtain cloth as a screen base. In the case of an air dome screen, the curtain fabric used for the air film structure may have a model number determined by structural calculation. Therefore, the present invention which can use an existing curtain fabric is very useful.

The conceptual diagram which shows the general usage of the screen for stereoscopic image projection. The conceptual diagram which shows the usage method of the screen for stereoscopic image projection of this invention. Sectional drawing of 1st Example of the screen for stereoscopic image projection of this invention. Sectional drawing of 2nd Example of the screen for stereoscopic image projection of this invention. The conceptual diagram which shows the manufacturing method of 2nd Example of the screen for stereoscopic image projection of this invention. The conceptual diagram which shows the different usage of the 3D image projection screen of this invention. The conceptual diagram which shows the different usage of the 3D image projection screen of this invention.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 3 is a cross-sectional view of a first embodiment of the stereoscopic image projection screen according to the present invention. Reference numeral 1 in the figure denotes a base fabric that becomes a core material of the screen. The base fabric 1 is made of a fibrous material, and glass fiber or polyester fiber is used as the fiber yarn. Reference numeral 11 in the figure denotes a resin layer that is layered on the base fabric 1. The resin layer 11 is made of vinyl chloride resin or polyurethane resin, and can be mixed with silver metal powder such as aluminum powder in the molten state.

  FIG. 4 is a cross-sectional view of a second embodiment of the stereoscopic image projection screen of the present invention. Reference numeral 13 in the figure denotes a screen base made of a ready-made curtain fabric, and has a structure in which a resin layer 12 is layered on a fibrous base fabric 10 such as glass fiber or polyester fiber. Reference numeral 14 in the figure denotes a resin layer that is layered on the screen substrate 13. The resin layer 14 is made of vinyl chloride resin or polyurethane resin, and in a molten state, silver metal powder such as aluminum powder is mixed.

  FIG. 5 is a diagram showing a manufacturing process of the stereoscopic image projection screen of the second embodiment. A screen substrate 16 such as a vinyl curtain is transferred by the conveying roller 16 while being in contact with the transfer roller 15, and a molten resin 14 </ b> A for forming the resin layer 14 is layered on the screen substrate 16 through the transfer roller. Reference numeral 17 in the figure denotes a blade for leveling the thickness of the molten resin 14A attached to the transfer roller 15.

  As a result of the projection test, it was confirmed that the stereoscopic image projection screen of the present invention constructed as described above reproduced the direction of polarization shown in FIG. 1 and entered the audience's glasses. It was confirmed that it can be used as a 3D image screen.

  FIG. 2 is a diagram showing how to use the stereoscopic image projection screen S having the above-described configuration. Here, the screen S is configured as a winding type screen that can be wound around the core 1. In the figure, reference symbol P1 denotes a right-eye projector for projecting a stereoscopic image onto the stereoscopic image projection screen S, F2 denotes a right-eye polarizing filter, P2 denotes a left-eye projector, and F2 denotes a left-eye polarizing filter.

  FIG. 6 is a diagram showing a different usage of the stereoscopic image projection screen S having the above-described configuration. Here, the screen S is configured as an air dome screen that retains a dome shape by sending air to a dome-shaped air film. Reference numeral 33 in the figure denotes a blower for blowing air into the air film. In the air dome screen of this embodiment, a projector equipped with a fish-eye lens or a super-wide-angle lens for projecting an all-sky image and a stereoscopic image projection projector with a normal angle of view for creating a square screen in front of the audience are used. is doing. Reference symbol P9 in the figure is a projector for an all-sky video. Further, in the figure, P20 is a stereoscopic projector for right eye having a normal angle of view, F20 is a polarizing filter for right eye, P21 is a stereoscopic projector for projecting left eye, and F21 is a polarizing filter for left eye. .

  FIG. 7 is a diagram showing different uses of the stereoscopic image projection screen S having the above-described configuration. Here, the screen S is configured as an air dome screen having a double air film structure in which the air between the inner film 31 and the outer film 32 is maintained at a negative pressure or a positive pressure to maintain a dome shape. Reference numeral 33 in the figure denotes a blower for sucking or blowing air in the air film. In the air dome screen of this embodiment, a stereoscopic projection projector equipped with a fish-eye lens or an ultra-wide-angle lens for projecting a whole sky image and a stereoscopic projection with a normal angle of view for creating a square screen in front of the audience The projector is used together. In the figure, P10 is a right-eye stereoscopic projector for right-eye projection, F10 is a right-eye polarizing filter, P11 is a left-eye stereoscopic projector, and F11 is a left-eye polarizing filter. Further, in the figure, P20 is a stereoscopic projector for right eye having a normal angle of view, F20 is a polarizing filter for right eye, P21 is a stereoscopic projector for projecting left eye, and F21 is a polarizing filter for left eye. .

S screen 10 base fabric 11 resin layer 12 screen substrate 14 resin layer

Claims (5)

  A projection screen comprising a fibrous base fabric and a resin layer, wherein the resin constituting the resin layer is mixed with silver metal powder.   A three-dimensional image projection screen in which a resin layer in which silver metal powder is mixed is layered on the surface of a screen substrate in which a resin layer is layered on a fibrous base fabric.   The three-dimensional image projection screen according to claim 1, wherein the screen is a winding type screen that can be wound around a core.   The three-dimensional image projection screen according to claim 1 or 2, wherein the screen is an air dome screen that is kept in a dome shape by blowing air into an air film having a dome shape.   3. The three-dimensional image projection according to claim 1, wherein the screen is an air dome screen having a double air film structure in which the air between the inner film and the outer film is maintained in a dome shape by maintaining a negative pressure or a positive pressure. For screen.

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