JPH0277736A - Transmissive screen - Google Patents

Abstract

PURPOSE:To obtain a seamless transmissive screen for a large picture by adhering a group of rod-like or spherical lenses with resin, etc., and laminating them. CONSTITUTION:Spherical lenses 1 are spread all over the surface of a panel 3 and transparent resin 5 is filled into the gap between the lenses 1 and the panel 3 to adhere the lenses 1. Though the effect of the lenses 1 is lost by coating the lenses 1 with the resin 5, it is not lost by half filling because the refractive index of the resin 5 is nearly equal to that of the material of the lenses 1. Since the lenses 1 connect with the diffusion panel 3, incident light on the lenses 1 is condensed and efficiently converted into scattered light by the panel 3. A similar condensing effect is produced by laminating rod-like lenses in the longitudinal and transverse directions, fixing the lenses with transparent resin and superposing the fixed lenses. Since size is not limited and no seam is left, a transmissive screen for a projective display having a large picture can be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a transmissive rear screen used in a rear projection display, and particularly to a transmissive screen suitable for a large screen rear projection display.

Regarding

[Conventional technology]

The conventional transparent screen is disclosed in Japanese Patent Application Laid-Open No. 58-168042.
As stated in the publication, all synthetic resin materials such as methacrylic resin and vinyl chloride resin are used and extruded.

Since it is manufactured by molding, casting, injection molding, or heat press molding, molds exceeding 15 m cannot be made.
In order to create a large transparent screen, a method of gluing multiple screens together has been used.

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[Problem to be solved by the invention]

The above-mentioned conventional technology adheres a plurality of screens.

Because it is a method, it does not have enough tensile strength or bending strength to support its own weight, and it necessarily requires a thick backing plate.
There was a problem that the total weight was excessive.

Also, for screen adhesion, Lentzki.

Since it is necessary to precisely align the wavefront of the Nira lens at the valley position, highly skilled techniques are required.

There was a problem.

The purpose of the present invention is to improve the size of the transmission type screen.

The purpose of the present invention is to provide a technology for forming a seamless screen even if it is sized for a large screen.

[Means to solve the problem]

The above object is achieved not by manufacturing the screen by molding, but by bonding and laminating rod-shaped or spherical lens groups with resin or the like.

[Effect]

The Lovdo-shaped or spherical lenses that are the base material of the screen have no manufacturing limitations such as length, and because they have a laminated structure, they can be made into large-sized screens, so they can be used for seamless large screens. It is possible to obtain a transmission type screen.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is an external view of a portion of a transmission screen using the method of the present invention. 1 is a spherical lens, 2 is a '4 panel. 0 Figure 2 is a cross-sectional view of the transmission screen shown in Figure 1. Panel 2 consists of a diffusion panel 5 and a transparent panel 4. 9.5 is an adhesive panel. It is a resin for

The spherical lenses 1 are spread over the front surface of the panel 20 as shown in FIG. 2, and the space between the spherical lenses 1 and the diffusion panel 3 is filled with transparent resin 5, thereby bonding the spherical lenses. Since the transparent resin 5 and the spherical lens IFi are substances with similar refractive indexes, the lens effect disappears in the area filled with the transparent resin 5.However, the transparent resin 5 is filled in only a semicircle of the spherical lens 1.

If this is done, the lens effect of the spherical lens 1 will not be lost.

Further, since the spherical lens 1 and the diffusion panel 3 are in contact with each other, the light entering the spherical lens 1 is condensed and efficiently becomes scattered light at the diffusion panel 3.

Also, as you can see from the image, panel 2 is a crazy dog.

There are no manufacturing restrictions on the size of the spherical lens 1.

The reason for the dense arrangement on the surface of panel 2 is due to manufacturing limitations.

Since there is no size, this transmission screen is characterized by having no size restrictions.

Although the embodiment of the present invention uses a spherical lens, a rod-shaped lens is used.

The same light-concentrating effect can be obtained by stacking vertically stacked rod-shaped lenses hardened with transparent resin, and horizontally stacked rod-shaped lenses hardened with transparent resin. .

〔Effect of the invention〕

As described above, according to the present invention, since a mold is not used, there is no size limitation of 1.5 m or less as in the prior art, and a transmission type for large-screen projection displays. When constructing a screen, there is an effect that a seamless screen can be obtained.

In addition, since there are no seams, it has sufficient strength against its own weight, which has the effect of solving the problem of a significant increase in total weight due to reinforcing materials, etc.

[Brief explanation of the drawing]

FIG. 1 is an external view illustrating a transmission screen according to an embodiment of the present invention, and FIG. 2 is a sectional view of a transmission screen according to an embodiment of the invention.・Panel, 5...
・Diffusion panel, 4... Transparent panel, 5...
resin. Part 1 Figure 1-Response 2: Page

Claims (1)

[Claims] 1. A transmission screen for use in rear projection displays, etc., characterized in that it has a structure in which rod-shaped or spherical lenses are laminated, and the rod-shaped or spherical lenses are fixed with resin or the like. .