JPS59135450A - Transmission screen - Google Patents

Abstract

PURPOSE:To attain a screen suitable for a lenticular sheet for production television or the like, by dispersing fibrous light-scattering materials uniformly in a plate-shaped body, which consists of a transparent synthetic resin, in an approximately certain direction and molding them to scatter the light in the direction vertical to these fibrous materials. CONSTITUTION:Short or long fibers having a diameter of 0.5-50mu and >= 50mu length such as glass fibers, metallic or inorganic compound fibers, rayon or ''tetraon'' fibers, or the like are arranged in an approximately certain direction as light-scattering materials in a transparent moldable synthetic resin plate- shaped body 2 which consists of an acrylic resin, a polycarbonate, or the like desirably. In case of short fibers 3A, they are mixed and kneaded with a synthetic resin uniformly and are extruded and rolled to form a lenticular lens 4. In case of long fibers 3B, fibers are supplied continuously along the rear face side of the lens 4 and are buried by rolling. Thus, a transmission screen 1A or 1B where a directivity is given to light scattering is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a transmission type screen, particularly a lenticular sheet (hereinafter referred to as lenticular sheet 1~) type screen.

Conventionally, when it is desired to provide some degree of light diffusivity to a transmissive screen, a method of dispersing particulate light scattering material inside the screen has been used.
Calas, calcium carbonate, with a particle size of about 0.5 to 30μ
When a fine powder of silica, metal oxide, or other inorganic compound is used and the screen is formed as a plate of synthetic resin, it is blended in an amount of 0.5 to 5% by weight.

Oi! Child-like light scattering (In A, there is no directionality in light diffusion.

When the screen is connected to a lenticular sea 1 used in production television, horizontal light diffusion is achieved by vertically running lenses, but it is not diffused vertically. It is desirable to add a diffusion effect.

The present invention provides an improved transmission screen in response to such demands.

The transmission screen of the present invention is characterized in that a fibrous light-scattering material is present in a substantially constant direction within a plate-shaped body made of a transparent synthetic resin. .

When the transmission screen is a lenticular sea type, the direction of light scattering (A) should be perpendicular to the direction in which the lens runs.

The screen is made of a transparent, moldable, preferably thermoplastic synthetic resin. Typical materials include:
They are acrylic resin, polyvinyl chloride, polystyrene, boria U-bonate and ΔS resin.

As the light scattering material, those having a fiber diameter of 0.5 to 50μ are useful, and short fibers or long fibers with a length of 50μ or more are used. From glass fibers, asbestos, metal or inorganic compound fibers, rayon, nylon, T-Heron, and aromatic polyamide fibers, compatibility with synthetic resins, differences in refractive index,
Select by considering moldability etc. It may be colorless or may be wrapped in a suitable cloth.

The amount of the light scattering material to be used is determined in accordance with the desired degree of light scattering within the range of 0.5 to 20% by weight of the screen, which is the constituent resin particles.

The screen is manufactured using a molding method that is suitable for the synthetic resin used, and is selected depending on the length of the fibers of the light scattering material.

If it is a short fiber, it is uniformly kneaded with synthetic resin and extruded.
It is advantageous to form it in a roll to give it the shape of a lenticular lens. The fibers are aligned substantially in the extrusion direction by extrusion, and because of S, an alignment in a constant direction is obtained.
This product is similar to J shown in FIG. 183 and FIG. Transmissive screen 1A existing in a direction almost perpendicular to lens 4
I'll go.

In addition, in the case of long fibers, when the synthetic resin is extruded to form a roll, the fibers are continuously supplied along the back side of the lenticular lens, and the jn
A method of embedding it in j is preferable.

This product has the structure shown in Fig. 3 and Fig. 4.
However, on the back side 1n1 of the lenticular lens 4 made of transparent synthetic resin plate-like wood 2, long fiber-like light scattering +J 3
This is a transmissive screen 1B that covers the lens B in a direction perpendicular to it.

In addition to the above, a transmission type screen having a light-scattering material can also be made into a V-shaped structure by performing a molding method such as casting, injection, or pressing while leaving the fibers aside.

The transmission screen of the present invention has a substantially constant direction (this direction/υ
The light is diffused in the direction perpendicular to the fibrous light scattering material. Typical lenticular sea-1
In this case, in addition to the horizontal light diffusion by the lenticule lens, it is a preferable product that includes a horizontal fibrous light scattering material.

1 group milk-7 acrylic resin [100 parts by weight of Sumipex Ml-IJ (manufactured by Sumitomo Chemical Industries) pellets, 5 parts by weight of glass fibers with a diameter of 9μ and a length of 2 mm were blended, and by extrusion and roll molding. A transmission type screen, which is a lenticular sheet, as shown in FIG. 1 J3 and FIG. 2 was manufactured.

This was suitable as a projection television screen.

Example 2 The same acrylic resin as in Example 1 was formed into a lenticular sheet 1- by extrusion d5 and roll forming, and at that time, from the extrusion die to the mold roll, 1 glass long fiber with a diameter of 9 mm was A transmission type screen as shown in FIGS. 3 and 4 was manufactured by supplying a large number of glass fibers (the amount of glass fibers were the same as in Example 1) along the extrusion direction.

This product was also suitable as a projection television screen.

[Brief explanation of the drawing]

1 and 2 show an example of a transmission screen of the present invention, with FIG. 1 being a plan view and FIG. 2 being a sectional view. 3 and 4 show another example of the transmission screen of the present invention, with FIG. 3 being a plan view and FIG. 4 being a sectional view. IA, IB...Transmissive screen 2...Synthetic resin plate-shaped body 3A...Light scattering moon (short line m> 3B...Light scattering 4J (long fiber) 4・・・・・・
Lentiki Collar Lens Patent Applicant Hitomihon Printing Co., Ltd. Agent Patent Attorney Souo Suga

Claims (5)

[Claims] (1) A transmission screen characterized by having fibrous light-scattering material arranged in a substantially constant direction within a plate-shaped body made of transparent synthetic resin. (2) The transmission screen of claim 1, wherein the transmission screen is a lenticular sheet running in a vertical direction, and the direction of the light scattering material is substantially horizontal. (3) Light scattering fiber with a diameter of 0.5 to 50μ and a length of 5
0.5 to 2 of a synthetic resin plate that is a chisen navy blue with a particle size of 0 μ or more
3. The transmission screen according to claim 2, wherein the amount of 0 mm% is substantially uniformly dispersed within the lenticular sheet. (4) The fibers of the light scattering material are long fibers with a diameter of 0.5 to 50 μm, and 0.5 to 20% by weight of the synthetic resin plate body is buried near the back surface of the lenticular sheet 1. A transmission screen according to claim 2. (5) The transparent synthetic resin is selected from acrylic resin, polyvinyl chloride, polystyrene, polycarbonate, and As resin, and is a light scattering material, glass fiber, asbestos, metal or inorganic compound fiber, rayon, nylon,
The transmission screen according to claim 1 or 2, which is selected from m-strings of Tetoron and aromatic polyamide.