Monochrome cathode ray tube electron gun with high voltage elect

Details Monochrome cathode ray tube electron gun with high voltage elect Monochrome cathode ray tube electron gun with high voltage elect

1988-11-14

1990-02-27

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313458, H01J 2948, H01J 2956

Patent

active

049048988

ABSTRACT:
A monochrome cathode ray tube incorporates an electron gun featuring a focusing electrode having an upper cup-shaped portion comprising a top cylindrical sidewall portion and a lower inwardly tapering sidewall portion connecting to a flat bottom portion, the cup-shaped portion supported by an elongated cylindrical base portion having a diameter of from about 44 to 48 percent of the diameter of the upper cylindrical portion of the cup. The electron gun is particularly suitable for use in monochrome cathode ray tubes for projection color television.

REFERENCES:
patent: 4271374 (1981-06-01), Kimura
patent: 4634924 (1987-01-01), Hernqvist
patent: 4649318 (1987-03-01), Kikuchi et al.
patent: 4728846 (1988-03-01), Yasuda

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