| 摘要 |
A filter consists of a base made of transparent thermoplastic resin and of a black meshed screen made of such resins as nylon and polyester. The black meshed screen, which is coated with carbon, is heated and pressed against the transparent base to embed it in one side of the base. The base is then heated and deformed into a convex shape so that the side where the black meshed screen is embedded is expanded. The deformed base is cooled while it is kept in the convex shape. As a result, a number of indented portions enclosed by the individual meshes are formed in the base because of a difference in thermal shrinkage coefficient between the base and the meshed screen. When external light is radiated against the filter, the indented portions on the base scatter the light, thus reducing the unwanted glare on the CRT screen. The carbon coated on the meshed screen absorbs incoming external light, further enhancing the glare prevention effect of the filter. The black meshed screen also contributes to a substantial improvement in the contrast of the displayed picture.
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