JPH0511347A - Screen for projection - Google Patents

Abstract

PURPOSE:To provide the screen for projection which exhibits good optical characteristics. CONSTITUTION:This screen for projection is formed by laminating a base material 1, a transparent synthetic resin layer 2 and a transparent protective layer 3 in this order. Fine flaws exiling on aluminum foil 4 are transferred and formed to the rear surface of the transparent synthetic resin layer 2 and aluminum is deposited by evaporation on the flawed surface to form a vapor deposited aluminum layer 5 between the transparent synthetic resin layer 2 and the base material 1. Ruggedness 6 is formed on the surface of the transparent protective layer 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection screen.

[0002]

2. Description of the Related Art Conventionally, various types of projection screens have been proposed.

The type shown in FIG. 1 is a general screen in which a white paint 31 is sprayed on a substrate 30.

The type shown in FIG. 2 is a screen in which transparent small balls 32 (beads) are attached to a base material 30.

The type shown in FIG. 3 is a type in which a wrench-shaped unevenness 33 is formed on the surface of a base material 30. The type shown in FIG. 4 is a type in which an aluminum foil 34 is attached to the surface of the base material 30.

[0006]

However, each of the above types has various drawbacks.

The type shown in FIG. 1 is a screen having the same diffusivity in both the horizontal and vertical directions, that is, an omnidirectional (isotropic diffusive) screen. Therefore, the screen gain is low and a so-called dark image appears. There is a drawback.

The type shown in FIG. 2 is also omnidirectional, the screen gain is low, and a dark image appears. Further, the type shown in FIG. 2 has a drawback that the beads 32 fall off when the surface of the screen is wiped or the screen is wound up and the durability is poor.

The type of FIG. 3 is better in directivity than the types of FIGS. 1 and 2 due to the existence of the wrench shape, but when dirt adheres to the wrench-shaped groove due to the wrench shape, the dirt is There is a maintenance problem that it is difficult to remove. In addition, the type of FIG. 3 has a defect that moire (interference fringes) are likely to occur due to the presence of the wrench shape and a defect that the resolution is poor.

The type shown in FIG. 4 is a fine scratch existing on the surface of the aluminum foil 34 (two kinds of fine unevenness of several μm generated on the aluminum foil 34 when the aluminum foil 34 is formed by rolling, which is a so-called Although it is a high-gain screen with improved resolution due to scratches formed in a state orthogonal to the hair line and the hair line, on the other hand, due to the rigidity of the aluminum foil 34,
When the screen is used as a roll-up screen, there is a problem that the winding step remains on the aluminum foil 34 and the aluminum foil 34 is not restored properly.

The present invention solves the above-mentioned drawbacks of various conventional examples, and provides a projection screen which can utilize the advantages of aluminum foil as it is and can also be used as a roll-up screen. It is a specific subject.

[0012]

The present invention will be described with reference to the accompanying drawings.

A projection screen in which a base material 1, a transparent synthetic resin layer 2 and a transparent protective layer 3 are laminated in this order, and fine scratches existing on the aluminum foil 4 are formed on the lower surface of the transparent synthetic resin layer 2. That the aluminum vapor deposition layer 5 was formed between the transparent synthetic resin layer 2 and the base material 1 by transferring aluminum to the scratched surface and forming the unevenness 6 on the surface of the transparent protective layer 3. The present invention relates to a characteristic projection screen.

[0014]

[Function] The aluminum foil 4 is attached to the screen according to the present invention because the aluminum vapor deposition layer 5 is formed on the lower surface of the synthetic resin layer 2 by transferring and forming fine scratches existing on the aluminum foil 4. Advantages of the screen, that is, good optical characteristics of the aluminum foil 4 can be obtained, and since the aluminum foil 4 itself does not exist, it can be used as a roll-up type screen.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings illustrate one embodiment of the present invention and will be described below.

First, as shown in FIG. 5, an ultraviolet curable resin as a transparent synthetic resin layer 2 is applied to an aluminum foil 4, and a matte film is formed as a transparent protective layer 3 on the surface of the resin as shown in FIG. (Roughened film having irregularities 6) is attached. The reason why the matte film is used instead of the mirror surface film is to eliminate so-called glare on the screen.

Then, by irradiating ultraviolet rays to cure the ultraviolet curable resin and demolding, a resin body 8 as shown in FIG. 7 is molded. The surface condition of the aluminum foil 4 is directly transferred and formed on the lower surface of the resin body 8, that is, the lower surface of the transparent synthetic resin layer 2. That is, the surface of the aluminum foil 4 has two kinds of fine scratches (concavities and convexities) of several μm (depth) generated when the aluminum foil 4 is rolled and formed. These two kinds of fine scratches (irregularities) are so-called hair lines that occur in the length direction of the aluminum foil 4 when the aluminum foil 4 is formed by rolling, and scratches that occur in a state orthogonal to the hair lines. Therefore, the scratches 10 on which the hair lines are transferred and the fine scratches 9 orthogonal to the scratches 10 are also formed on the lower surface of the transparent synthetic resin layer 2.

Subsequently, aluminum vapor deposition is performed on the scratch transfer forming surface 7 to form an aluminum vapor deposition layer 5.

Finally, an aluminum film is adhered to the aluminum vapor deposition layer 5 as the base material 1 to form the product of the present embodiment (see FIG. 8).

A commercially available aluminum foil 4 is used.

The fine scratches 9 transferred and formed on the lower surface of the transparent synthetic resin layer 2 should be transferred and formed in the vertical direction of the screen.

Further, as the transparent synthetic resin layer 2, urethane acrylate type ultraviolet curable resin is adopted. still,
Instead of the ultraviolet curable resin, a thermosetting resin may be adopted as long as it is transparent.

The thickness of the transparent protective layer 3 is 10
~ 300μm surface matte film (eg PP, P
(ET, PVC, etc.) is adopted, but any film may be used as long as it is a transparent and flexible film. Incidentally, FIG.
Uses a film having concavities and convexities 6 formed in the vertical direction of the screen in order to expand the diffusivity in the horizontal direction.

The base material 1 has a thickness of 10 to 500.
A μm colored flexible film (eg flexible PVC) is adopted. The use of a soft one is in consideration of use as a winding type.

In this embodiment, as described above, since fine scratches (unevenness) similar to those existing on the aluminum foil 4 are formed on the lower surface of the transparent synthetic resin layer 2, an aluminum foil screen is provided. Then, in the same way, the directivity in the horizontal and vertical directions is appropriate, that is, the directivity that the horizontal diffusivity is wide and the vertical diffusivity is narrow is exhibited, and the resolution is excellent. The screen for projection has a characteristic.

Since the aluminum foil 4 itself does not exist in this embodiment, it can be used as a winding screen.

[0027]

Since the present invention is constructed as described above, it has the following effects.

Optical characteristics similar to aluminum foil screen
It has (directivity, resolution, gain) and can be used as a roll-up screen.

Since the transparent protective layer is present on the surface, it is washable.

Since continuous manufacturing is possible, cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

FIG. 2 is an explanatory diagram of a conventional example.

FIG. 3 is an explanatory diagram of a conventional example.

FIG. 4 is an explanatory diagram of a conventional example.

FIG. 5 is an explanatory view showing a manufacturing process of the projection screen according to the present invention.

FIG. 6 is an explanatory view showing a manufacturing process of the projection screen according to the present invention.

FIG. 7 is an explanatory view showing a manufacturing process of the projection screen according to the present invention.

FIG. 8 is an explanatory view showing a manufacturing process of the projection screen according to the present invention.

FIG. 9 is an enlarged front view in which a part of the projection screen of the present invention is cut away.

[Explanation of symbols]

 1 base material 2 transparent synthetic resin layer 3 transparent protective layer 4 aluminum foil 5 aluminum vapor deposition layer 6 unevenness 9 fine scratches

Claims (1)

Claims: 1. A projection screen in which a base material, a transparent synthetic resin layer, and a transparent protective layer are laminated in this order, wherein an aluminum foil is present on the lower surface of the transparent synthetic resin layer. A fine scratch is transferred and aluminum is vapor-deposited on the scratched surface to form an aluminum vapor-deposited layer between the transparent synthetic resin layer and the base material, and irregularities are formed on the surface of the transparent protective layer. A projection screen.