JPH02161418A - Manufacture of transmissive screen - Google Patents

Abstract

PURPOSE:To readily produce a transmissive screen and to obtain such a transmissive screen that displays excellent screen characteristics by patterning a transparent resin sheet into a fine ruggedness by gears, providing an optical reflection film on the rugged face of the resin sheet with ruggedness and laminating plural sheets with an adhesive. CONSTITUTION:The transparent resin sheet is patterned into a fine ruggedness by the gears 2 and 2, and the optical reflection film is provided on the rugged face of the resin sheet 3 with fine ruggedness, all of which are laminated with the adhesive and formed in the plate-like shape. Thus, the transmissive screen can be readily produced. While light made incident on the transmissive screen obtained in such a way is reflected by the reflection film provided on the resin sheet with a fine ruggedness, it comes out and diffuses at a large angle; therefore picture deterioration because of the horizontal array of a cathode ray tube can be prevented to display excellent screen characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a transmissive screen that forms an image of a television, slide, or movie on its back surface so that it can be viewed from the front.

Conventional technology Transmissive screens have a one-piece type (Japanese Patent Application Laid-Open No. 5-111), which consists of a Fresnel lens and a lenticular lens on both sides of a single temporary screen.
7-210333) and a two-piece type (Japanese Patent Application Laid-Open No. 186732/1983) in which a Fresnel lens plate and a lenticular lens plate are combined into one set are used.

FIG. 3 shows an example of projecting a television image. The incident light beam 6 is converted into a parallel light beam 7 by a Fresnel lens 9 and enters a lenticular lens 10 . The incident light is converted into a scattered light beam 8 by the convex cylindrical lens surface 11 on the surface of the lenticular lens 10, and reaches the viewer's eyes.

Problems to be Solved by the Invention It is expected that the image projected by the configuration shown in FIG. 3 will have the same color tone no matter what angle it is viewed from. However, as shown in FIG. 4, the projection tubes include a blue projection tube (B-CRT) 14, a green projection tube (G-CRT) 15, and a red projection tube (R-CRT) 1.
6 are arranged in a row, the angles of incidence on the screen 20 will be slightly different. Since the red light I9 is more strongly incident on the eyes of the viewer A12 than the blue light 17, the screen feels red, and the blue light 17 is more strongly incident on the eyes of the viewer B13 than the red light 19, so the screen feels blue. It will be done.

Green light 18 has an intermediate feel and doesn't feel particularly strange, but
Because of this phenomenon, transmissive screens have had the problem that the color tone varies depending on the viewing direction.

Means for Solving the Problems In order to solve the above problems, the method for manufacturing a transmission screen of the present invention involves shaping a sheet of transparent resin into fine irregularities using a gear, and forming irregularities on the resin sheet having the fine irregularities. An optical reflective film is provided on the surface, and a large number of these are laminated via an adhesive.

Function: According to the present invention, a transmission type screen can be easily produced by the above-described configuration. In addition, in the transmissive screen obtained by this method, the incident light is reflected by the reflective film provided on the resin sheet with fine irregularities and then emitted, so the emitted light is scattered over a wide angle and exhibits excellent screen characteristics. .

EXAMPLE Hereinafter, a method of manufacturing a transmission screen according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing the first step of a method for manufacturing a transmission screen in an embodiment of the present invention.

In FIG. 1, reference numeral 1 indicates a transparent resin sheet, and reference numeral 2 indicates a gear 3, a resin sheet having fine irregularities. A transparent resin sheet 1 extruded and molded from a nozzle (not shown) of a resin molding machine is molded by a gear 2 before the resin cools and hardens, producing a resin sheet 3 having fine irregularities.

FIGS. 2(a) to 2(C) are process diagrams for manufacturing a screen using the resin sheet 3 having fine irregularities created in the first step shown in FIG. 1.

In FIG. 2, 4 is an optical reflection film, and 5 is a screen. An optical reflective film 4 is provided on the uneven surface of a resin sheet having minute unevenness by vapor deposition or plating (see Fig. 2).
b)), a large number of these are laminated via an adhesive so as to have a desired size to form the screen 5. (Figure 2 (C))
The optical reflection film 4 is provided here so that the light incident on the screen 5 undergoes multiple reflections and travels, thereby making the emitted light diffused light with a wide angular distribution. The reflective film may be made of various metals such as aluminum, nickel, silver, gold, chromium, titanium, or alloys thereof. Further, as the material of the transparent resin, resins such as acrylic resin, polycarbonate resin, transparent nylon, and transparent polyester can be used.

As described above, according to this embodiment, a transmission screen made of a transparent sheet having fine irregularities can be easily produced.

Effects of the Invention As described above, the present invention involves molding a transparent resin sheet into minute irregularities using a gear, providing an optical reflective film on the uneven surface of the resin sheet having minute irregularities, and applying an adhesive to the transparent resin sheet. A transmission type screen can be easily made by laminating a large number of materials through the film and configuring them into a plate shape. In addition, in the transmission type screen obtained by this method, the incident light is reflected by the reflective film provided on the resin sheet with minute irregularities and then emitted, and the emitted light is scattered over a wide angle, so it is similar to the cathode ray tube shown in Figure 4. It is possible to prevent the deterioration of the image tone that occurs based on the horizontal arrangement of the images.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the first step of a method for manufacturing a transmission screen according to an embodiment of the present invention, FIG. 2 is a process diagram for manufacturing the screen, and FIG. 3 is a cross-sectional structural diagram of a conventional transmission screen. , FIG. 4 is an explanatory diagram illustrating color tone deviation, which is a drawback of the conventional transmissive screen. 1...Transparent resin sheet, 2...Gear, 3...Resin sheet with fine irregularities, 4...
...Optical reflective film, 5...Screen. Name of agent: Patent attorney Shigetaka Awano Idiot 1 Figure Figure

Claims (1)

[Claims] A transparent resin sheet is molded into fine irregularities using a gear, an optical reflective film is provided on the uneven surface of the resin sheet having fine irregularities, and a large number of these are laminated using an adhesive. How to make mold screen