JPH0748101B2 - Reflective screen and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> In recent years, a projection type television using a liquid crystal panel or the like has appeared on the market, but in order to increase the brightness of a light source,
There is a limit and to get a bright image on the screen,
There has been an increasing demand for bright screens with better reflection characteristics than conventional screens.

The present invention relates to a reflective screen suitable for viewing a projected image of a projection television and a manufacturing method thereof.

<Prior Art> In order to view a projected image reflected on a screen as a bright image within a set range of up, down, left and right, there is the following prior art in which the screen surface is processed.

a. A screen having a smooth surface and a soft surface of the soft vinyl chloride sheet 7 that is embossed to form a reflective surface. (Fig. 2) Assuming that the reflection brightness is higher than that of the ba screen,
There is a screen in which a reflective surface 9 composed of a printed layer of ink or a metal deposition layer is formed on the surface of a screen base material 8 and then embossed. (Fig. 3) c. The reflective brightness is further increased, and transparent beads 11 having a light converging property are lined up and adhered to the surface of the screen substrate 10 (regardless of the presence or absence of the above-mentioned reflective surface). There is a beaded screen. (Fig. 4) <Problems to be solved by the invention> The screens a and b must be embossed to form a reflecting surface, and the embossing roll is expensive and a visually desirable pattern. It takes a lot of time and labor to obtain the embossing roll. In addition, in the case of b, the process of printing → embossing during screen manufacturing becomes complicated.

The bead type screen of c has a problem that the structure is complicated and it is difficult to cope with a small lot from the viewpoint of manufacturing equipment, workability and cost.

<Means for Solving the Problem> The present invention is intended to obtain a reflection type screen having a concavo-convex pattern on the surface of a reflection surface by a two-step printing process without requiring an embossing process.

<Example> Hereinafter, an example of the present invention using a gravure printing plate will be described.

(1) Prepare a plate having a grid pattern.

The pattern is line width 100μm, pitch 250μm, cell depth 15
It is 0 μm.

(2) The ink having the following composition is used to print the first ink 2 on the surface of the white soft vinyl chloride screen substrate 1 with the plate of (1), and the solid is dried and solidified.

Composition of the first ink 20 parts by weight vinyl chloride resin Al paste 7 〃 MEK: toluene = 1: 1 73 〃 100 〃 (3) Lattice engraving gravure plate (solid) with a cell depth of 35 μm from above (2) The second ink layer 3 (light reflecting layer) is printed using an ink having the following composition.

Composition of second ink 20 parts by weight vinyl chloride resin Pearl pigment 25 〃 MEK: toluene = 1: 1 55 〃 100 〃 (4) Due to the surface tension of the second ink, it is sufficient for the grid pattern consisting of the first ink layer The second ink layer is dried when it has become familiar.

Through the above steps, a screen having a reflecting surface having irregularities with different reflecting characteristics was obtained.

The cross-sectional characteristics of the screen according to this example are: grating pitch 250 μm, grating film thickness 7 μm, light reflection layer film thickness 2 to 3 μm, and the surface shape is a part of a spherical surface with R = 800 μm (250
(× 250 μm) are lined up on one surface, and the diffusion angle at the time of irradiating the screen with light rays was about ± 20 °. The composition of the grid pattern and the first and second inks is not limited to that of this embodiment, and can be appropriately changed if desired.

<Effect of the Invention> According to the present invention, it is possible to obtain a reflective screen having a desired uneven pattern on the surface by a simple process.

[Brief description of drawings]

FIG. 1 (a) is a cross-sectional explanatory view showing a reflective screen according to the present invention, and FIG. 1 (b) is an explanatory view showing an example of a grid pattern. 2 to 4 are cross-sectional explanatory views showing a reflection type screen according to the prior art. DESCRIPTION OF SYMBOLS 1 ... Screen base material 2 ... 1st ink layer 3 ... 2nd ink layer (light reflection layer) 7 ... White soft vinyl chloride sheet 8 ... Screen base material 9 ... Reflective surface 10 ... Screen base material 11 ... Transparent beads

Claims (2)

[Claims] 1. A grid-shaped first ink layer having a line width of 50 to 150 μm, a pitch of 100 to 300 μm, and a thickness of 10 to 20 μm on a substrate made of a plastic film or sheet, and a light reflecting layer thereon. A reflective screen formed by forming a second ink layer to be a solid shape having a thickness of 2 to 4 μm. 2. A first ink layer is printed in a grid pattern having a line width of 50 to 150 μm, a pitch of 100 to 300 μm, and a thickness of 100 to 200 μm on a substrate made of a plastic film or sheet, and after drying and solidifying. A method for producing a reflection type screen, comprising printing a second ink layer, which serves as a light reflection layer, in a solid form with a thickness of 20 to 40 μm and then drying and solidifying it.