Cathode-ray tube with interference filter

Details Cathode-ray tube with interference filter Cathode-ray tube with interference filter

1990-06-29

1993-01-12

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Screen

313112, 313371, 313473, 313474, 313479, H04N 572, H01J 2989, G02B 528

Patent

active

051793180

ABSTRACT:
A cathode-ray tube having a face plate which includes a phosphor layer provided at the inner surface side of a glass plate and an optical interference filter provided between the phosphor layer and the inner surface of the plate. The optical interference filter is constituted by high- and low-refractive index layers. The outermost layer of the optical interference filter in contact with the phosphor layer is an Al.sub.2 O.sub.3 layer or a ZrO.sub.2 layer having a physical thickness of 10 nm or more. The high-refractive index layer of the optical interference filter preferably consists of TiO.sub.2, and its low-refractive index layer preferably consists of Al.sub.2 O.sub.3.

REFERENCES:
patent: 4029394 (1977-06-01), Araki
patent: 4683398 (1987-07-01), Vriens et al.
patent: 4717856 (1988-01-01), Kato
patent: 4798994 (1989-01-01), Rijpers et al.
patent: 4846551 (1989-07-01), Rancourt et al.
patent: 4859902 (1989-08-01), De Leeuw et al.
patent: 4940636 (1990-07-01), Brock et al.
patent: 4983001 (1991-01-01), Hagiuda et al.
patent: 4990824 (1991-02-01), Vriens et al.

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