JP2002107828A - Reflection type screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection type screen, which copes with various kinds of projectors and also by which superior contrast performance and incombustibility which is equal to those of the conventional polarizing screen for an aircraft are demonstrated. SOLUTION: A sticking layer 2 is laminated on a reflection layer 1, made of a metal whose surface total light beam reflectance is set at >=70%, and a transparent film layer 3 is laminated on the sticking layer 2, and an adhesive layer to which a dye is added is laminated on the transparent film layer 3 as a light-absorbing layer 4, and a light diffusing film layer 5, the haze of which is set between the range of 40% to 70% is laminated on the light- absorbing layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection type screen used in an aircraft or the like.

[0002]

2. Description of the Related Art Interior parts used in aircraft are subject to strict combustion standards (for example,
F2) needs to be cleared, and the reflection type screen used in this aircraft naturally has a high flame retardance that satisfies strict combustion standards.

[0003] Reflective screens used in aircraft are required to have high contrast performance in addition to flame retardancy. The reason is that if the interior of the aircraft is bright due to the illumination and the contrast performance is low, the illumination light enters the reflective screen as external light and is reflected and enters the eyes of the observer,
This is because the image becomes unclear.

[0004] Reflective screens used in aircraft are classified into a roll type (winding type) and a panel type (installation type). The roll type can be wound and stored at the time of departure and arrival with a high risk of fire, but the panel type cannot be stored. Therefore, it is required to meet a stricter combustion standard (for example, F1) than the roll type.

However, unlike the roll type, the panel type does not need to be wound up and stored, so that its structure is less restricted.
Therefore, a panel-type reflective screen is a polarizing screen capable of exhibiting high contrast performance, that is, a light diffusion surface for preventing the external light from entering the eyes of the observer as much as possible. Layers are laminated, and on the other hand, a metal reflective layer such as an aluminum plate is laminated on the back surface of the polarizing plate to reflect light passing through the polarizing plate and improve the flame retardancy of the entire screen. Is adopted.

However, in recent years, the technology of a projector for projecting an image on the reflection type screen has been advanced, and in order to project a clearer image, for example, G among R (red), G (green), and B (blue) is used. The oscillation directions of the polarized light of R and B
A new type of projector has been proposed in which the direction of rotation of the polarized light is rotated by 90 °. Then, when the projection light from the new projector is projected onto the polarizing screen, for example, R and B pass through the polarizing plate and are reflected well by the metal reflection layer, but G is R and B and the polarization of light. Since the vibration directions are different, there is a problem that the light cannot pass through the polarizing plate and is not necessarily reflected by the metal reflection layer (that is, G does not enter the eyes of the observer).

Therefore, there is a need in the industry for a reflective screen that can be used with a new type of projector and that exhibits the same high contrast and flame retardancy as a conventional polarizing screen for aircraft.

[0008] The present invention provides a reflective screen which achieves the above-mentioned needs.

[0009]

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

An adhesive layer 2 is laminated on a metallic reflective layer 1 whose surface has a total light reflectance of 70% or more, a transparent film layer 3 is laminated on the adhesive layer 2, 3
A reflective layer comprising a light-absorbing layer 4 and a light-diffusing film layer 5 having a haze of 40 to 70%. It relates to a screen.

The reflective screen according to claim 1, wherein a hairline-treated aluminum plate is used as the metallic reflective layer 1.

[0012] The reflective screen according to any one of claims 1 and 2, wherein a polypropylene film is employed as the transparent film layer 3.

The reflective screen according to any one of claims 1 to 3, wherein a biaxially stretched polypropylene film is used as the light diffusion film layer 5. is there.

A reflection type screen used in an aircraft, wherein a polypropylene film is laminated on a hairline-treated aluminum plate via an adhesive layer, and an adhesive layer containing a black dye added on the polypropylene film. Are laminated, and a biaxially stretched polypropylene film is laminated on the adhesive layer.

In the reflection type screen according to the present invention, the thickness of the hairline treated aluminum plate is set to 0.5 to 1.0 mm, and the thickness of the adhesive layer is set to 20 to 30 μm.
m, the thickness of the polypropylene film is set to 15 to 25 μm, and the thickness of the adhesive layer is 3 to 10 μm
, And the thickness of the biaxially stretched polypropylene film is set to 15 to 25 μm.

[0016]

The projection light projected from the projector passes through the light diffusion film layer 5, the light absorption layer 4, the transparent film layer 3, and the adhesive layer 2, and is reflected by the metal reflection layer 1, Again, the light passes through the adhesive layer 2, the transparent film layer 3, the light absorbing layer 4 and the light diffusing film layer 5, and enters the eyes of the observer.

Since the present invention employs a configuration that does not include a polarizing plate, it goes without saying that, among the RGB components of the projection light projected from the projector, for example, only G has a different polarization vibration direction. Also, the projection light can be well reflected and enter the eyes of the observer.

Further, when an experiment was carried out with the structure of the present invention, it was confirmed that the film had flame retardancy capable of meeting the F1 standard and high contrast property equivalent to that of a conventional polarizing screen. .

Since the present invention is configured as described above, it can reflect any type of projection light projected from the projector, and is extremely practical with both high flame retardancy and high contrast performance. , A reflective screen with excellent versatility.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate one embodiment of the present invention and will be described below.

In this embodiment, the total light reflectance of the surface is 70%.
An adhesive layer 2 made of an adhesive is laminated on the metal reflective layer 1 described above, a transparent film layer 3 is laminated on the adhesive layer 2, and a dye is added on the transparent film layer 3. The present invention relates to a reflection type screen used in an aircraft in which layers are laminated as a light absorbing layer 4 and a light diffusing film layer 5 having a haze of 40 to 70% is laminated on the light absorbing layer 4.

The metal reflection layer 1 has a thickness of 0.5 to 1.
An aluminum plate excellent in reflectivity of 0 mm is employed.
The thickness of the aluminum plate is appropriately selected from the viewpoint of flame retardancy and light weight (the interior parts of an aircraft are required to be as light as possible).

The aluminum plate is subjected to a hairline treatment.

The hairline treatment is a treatment in which an aluminum plate is rubbed while being moved in a certain direction with a file, a polishing machine, or the like. A large number of ultra-fine grooves are cut in parallel on the surface of the aluminum plate.

Further, the aluminum plate is provided in a state where the ultra-fine grooves extend in the vertical direction. Therefore, this aluminum plate exhibits the characteristic that the light diffusivity in the horizontal direction is high and the light diffusivity in the vertical direction is low. Therefore, the illumination light from the ceiling in the aircraft is hardly reflected by the metal reflective layer 1 in the observer direction (horizontal direction), and the projection light projected from the projector is appropriately diffused in the left-right direction. In addition, the projection light can be satisfactorily input even to an observer at an oblique left and right position of the screen.

The adhesive layer 2 is formed by applying an adhesive such as an acrylic resin to the aluminum plate at a thickness of 20 to 30 μm. In addition, the adhesive layer 2 may be formed by applying an adhesive other than the adhesive, or an adhesive that has recently been distributed in the market, or an adhesive.

The transparent film layer 3 employs a polypropylene film. Further, a polypropylene film having a thickness of 15 to 25 μm is employed. Since this polypropylene film is excellent in light transmittance, it allows the projection light from the projector to pass well.

The light absorbing layer 4 is formed by applying an adhesive having excellent flame retardancy, such as a urethane resin to which a dye is added, to the polypropylene film in a thickness of 3 to 10 μm. With the added dye, the adhesive exhibits a light absorbing effect.

As a dye added to the adhesive, a black dye is employed in this embodiment. The black dye desirably has a spectrum that absorbs light other than the main wavelength range of the projector light. In addition, in the case where the reflection of light in a specific wavelength region is suppressed in order to obtain a good image, for example, a configuration in which a red dye is added in addition to the black dye may be employed.

The light absorbing layer 3 has a total light transmittance of 50%.
It is desirable to employ a value of from 70% to 70%.

The light diffusion film layer 5 has a thickness of 15 to 25
A μm biaxially oriented polypropylene film is employed. The stretching of the polypropylene film is appropriately selected in consideration of the optical characteristics of the screen, in particular, the ratio between the top gain of the screen and the gain at a predetermined angle from the normal to the screen.

The top gain is the maximum value of the ratio when the luminance (cd / m ² ) of the white plate when light is irradiated on the white plate is 1.

Hereinafter, the results of performance experiments of this embodiment will be described in detail.

A hairline-treated aluminum plate having a thickness of 1.0 mm was used as the metal reflection layer 1, and a sticking layer 2 having a thickness of 2 mm was used.
An acrylic resin adhesive is laminated on 5 μm, a 20 μm thick polypropylene film is laminated as the transparent film layer 3, and a 5 μm thick urethane resin adhesive added with a black dye is laminated as the light absorbing layer 4, and light diffusion is performed. When the flame retardancy of the product of this example in which a biaxially oriented polypropylene film having a thickness of 20 μm was laminated as the film layer 5 was measured, the screen was cut into a strip shape according to F1 standard, that is, the screen was vertically suspended with a 60 second burner. Fire extinguishing time after ignition is 1
It was satisfied that the length was within 5 seconds and the carbonization length was within 6 inches (152 mm).

Further, when it was determined whether or not the combustion standard stipulated in FAR25.853 (US Federal Aircraft Materials Test Method) was satisfied, the total calorific value was 65 kW · min /
m ² or less in against, 43.08kw · min / m ^2, against the following maximum heating value 65 kW / m ^2, a 54.55kw / m ^2, it was confirmed that satisfactory enough combustion standards.

Note that the total heat value means the total heat value up to two minutes after ignition, and the maximum heat value means the maximum heat value at the peak of the combustion curve.

Also, with the above configuration, a 50-inch reflective screen (rectangular, with a diagonal distance of 50 inches (1270 m)
m), and the contrast performance was measured. The top gain was 2.00, and the horizontal angle at which the gain was の of the top gain with respect to the screen normal was 34.4 °. The angle in the horizontal direction, which is, was 48.1 °, and it was confirmed that the image had a contrast performance in which an image could be clearly seen even in an aircraft.

Incidentally, in the existing polarizing screen for aircraft,
Although the F1 standard is satisfactory, the top gain is 2.70,
Gain is 1/1 of top gain with respect to screen normal
The horizontal angle at 2 was 21.7 °, and the horizontal angle at 1/3 was 31.9 °.

That is, it was confirmed that the present embodiment is superior in the horizontal viewing angle characteristic to the existing polarizing screen.

Further, a temperature of -20 to 60 ° C. and a humidity of 95
% (RH), it was also confirmed that good environmental resistance performance was exhibited.

As described above, the present embodiment does not use a polarizing plate, so that even if the projection light from any projector is reflected well, it is practically possible for an observer to see an image. , A reflective screen with excellent versatility.

Further, it has flame retardancy that can meet the F1 standard, and has high contrast property equivalent to that of a conventional polarizing screen, so that it is extremely excellent for an aircraft and has a clear observer. You can see the image.

Further, since the external light in the vertical direction, that is, the illumination light particularly from the ceiling is hard to reach the observer, the observer can see a clear image also in this respect.

Also, since it has excellent horizontal viewing angle characteristics, it is suitable for a visual environment in an aircraft.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal reflection layer 2 Adhesion layer 3 Transparent film layer 4 Light absorption layer 5 Light diffusion film layer

Claims (6)

[Claims] An adhesive layer is laminated on a metallic reflective layer having a total light reflectance of 70% or more on the surface, a transparent film layer is laminated on the adhesive layer, and a transparent film layer is laminated on the adhesive layer. A reflective screen, comprising: a light absorbing layer having a dye added thereto as a light absorbing layer; and a light diffusion film layer having a haze of 40 to 70% on the light absorbing layer. 2. The reflective screen according to claim 1, wherein a hairline-treated aluminum plate is used as the metal reflective layer. 3. The reflective screen according to claim 1, wherein a polypropylene film is employed as the transparent film layer. 4. The reflective screen according to claim 1, wherein a biaxially stretched polypropylene film is employed as the light diffusion film layer. 5. A reflective screen used in an aircraft, wherein a polypropylene film is laminated on a hairline-treated aluminum plate via an adhesive layer, and an adhesive layer comprising a black dye added on the polypropylene film. And a biaxially stretched polypropylene film is laminated on the adhesive layer. 6. The reflective screen according to claim 5, wherein the thickness of the hairline treated aluminum plate is 0.5 to 1.0.
mm, the thickness of the adhesive layer is set to 20 to 30 μm, and the thickness of the polypropylene film is 15 to 25 μm.
A reflective screen, wherein the thickness is set to 3 μm, the thickness of the adhesive layer is set to 3 to 10 μm, and the thickness of the biaxially stretched polypropylene film is set to 15 to 25 μm.