Color cathode ray tube apparatus

Details Color cathode ray tube apparatus Color cathode ray tube apparatus

1990-10-25

1992-05-12

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313413, 313414, 313428, H01J 2951, H01J 2962

Patent

active

051131129

ABSTRACT:
In a color cathode ray tube apparatus of this invention, an electron beam forming unit of an electron gun outputs electron beams to have an interval of 3.5 to 6.0 mm between adjacent beams, and a ratio of a neck inner diameter to the interval between the adjacent electron beams is 5.1 or more. The main lens unit of the electron gun has a large-aperture electron lens formed by a substantially cylindrical first electrode for allowing three electron beams to pass therethrough, and a substantially cylindrical second electrode in which most of the first electrode is arranged.

REFERENCES:
patent: 2160021 (1939-05-01), Iams
patent: 4142131 (1979-02-01), Ando et al.
patent: 4443736 (1984-04-01), Chen
patent: 4678964 (1987-07-01), Peels

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