US 4,877,308 AGranted

Light shielding screen structure and a process for producing the same

AssigneeAsahi Kasei Kogyo Kabushiki Kaisha

InventorsOsamu Okuno, Shigeru Sugiyama

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Abstract

A light shielding screen structure comprising a first light transmissible substrate, a second light transmissible substrate and, interposed therebetween, a light shielding screen comprising a perforated structure comprising a plurality of fine partition walls and apertures defined by said partition walls, said first and second light transmissible substrates being connected respectively to both end surfaces of the parition walls of the light shielding screen through a photocured adhesive layer. The screen structure exhibits a peeling strength of 50 g/cm or more at the connection between each partition wall and each light transmissible substrate and includes a fillet of not greater than 5 .mu.m in width in each aperture at a corner portion defined by the inner wall of each aperture and the inner surface of each light transmissible substrate. The light shielding screen structure exhibits not only excellent mechanical strength but also excellent optical properties and is advantageously used in various indicators and image indicating devices.

Claims10

Dependent claims

A light shielding screen structure comprising:

a first light transmissible substrate;
a second light transmissible substrate;
and
a light shielding screen interposed between said
first light transmissible substrate and said second
light transmissible substrate,
said light shielding screen comprising a photocured resin composition layer and a plurality of apertures passing through said resin composition layer,
said apertures in said resin composition layer forming a perforated structure of a striped or sectioned pattern, in which said resin composition layer constitutes partition walls defining said apertures,
said apertures having their respective upper and lower openings respectively defined by the upper and lower ends of said partition walls,
the upper and lower end surfaces of said partition walls being connected respectively to said first light transmissible substrate and said second light transmissible substrate through a photocured adhesive layer, with part of the photocured adhesive layer which protrudes outwardly from the areas of the upper and lower end surfaces of said partition walls forming a fillet in each aperture at a corner portion which is defined by the inner wall of each aperture and the inner surface of each light transmissible substrate,
the connection between each partition wall and each light transmissible substrate having a peeling strength of 50 g/cm or more, and
said fillet having a width of not greater than 5 .mu.m.

9 more elements

A process for producing a light shielding screen structure comprising:

(a) providing a light shielding screen comprising a perforated structure comprising a plurality of partition walls and apertures defined by said partition walls, said partition walls being arranged to form the apertures in a striped or sectioned pattern, said light shielding screen being in a composite form in which said light shielding screen is connected at one end surface of each partition wall to a first light transmissible substrate through a photocured adhesive layer or being in a single form;
(b) in the case of the light shielding screen in a single form, pressing a first light transmissible substrate having a photocurable adhesive layer and a second light transmissible substrate having a photocurable adhesive layer respectively against both sides of said light shielding screen to obtain a laminate assembly, or
in the case of the light shielding screen in a composite form, pressing said light shielding screen against a second light transmissible substrate having a photocurable adhesive layer on its side of the photocurable adhesive layer to obtain a laminate assembly;
and
(c) exposing the laminate assembly to active rays to cure the photocurable adhesive layer, thereby providing a connection between each partition wall and each light transmissible substrate having a peeling strength of 50 g/cm or more and providing a fillet having a width of 5 .mu.m or less, said fillet being defined as part of the photocured adhesive layer which protrudes outwardly from the areas of the upper and lower end surfaces of said partition walls in each aperture at a corner portion defined by the inner wall of each aperture and the inner surface of each light transmissible substrate.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/201,467Filed 2 Jun 1988
Priority: JP 62-15551124 Jun 1987
Granted: 31 Oct 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H01J 29/89
Vessels; Containers; Vacuum locks: optical or photographic arrangements structurally combined or co-operating with the vessel
F21V 11/06
Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00: using crossed laminae or strips , e.g. grid-shaped louvers; using lattices…
G02B 5/00
Optical elements other than lenses
H04N 5/72
Details of television systems: modifying the appearance of television pictures by optical filters or diffusing screens