Projection cathode-ray tube having enhanced image brightness

Details Projection cathode-ray tube having enhanced image brightness Projection cathode-ray tube having enhanced image brightness

1984-10-30

1987-02-10

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 64, H04N 574, H04N 931

Patent

active

046426957

ABSTRACT:
A projection cathode-ray tube comprises a vacuum vessel (10) having a face plate (7), an interference thin film (20) on the inner surface of the face plate, a phosphor layer (8) on the interference thin film, a metal-back film (9) on the phosphor layer and an electron gun within the vessel. More than 30% of the total luminous flux from an emission point in the phosphor layer to which the electron beam of the electron gun is applied exists within a divergent angle of .+-. 30.degree. in the direction normal to the face plate.

REFERENCES:
patent: 2481621 (1949-09-01), Rosenthal
patent: 2527879 (1970-09-01), Pritchard
patent: 4518985 (1985-05-01), Tamatani

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