Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1997-03-21
1999-04-13
Patel, Nimeshkumar D.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313417, 313446, 313448, 313449, 313451, 313456, H01J 2948, H01J 2950, H01J 2962
Patent
active
058941908
ABSTRACT:
A cathode ray tube is provided with an electron gun having an electron lens including a large-diameter cylinder electrode and a small-diameter cylinder electrode composed of a large-diameter cylinder portion and a small-diameter cylinder portion, and at least the large-diameter cylinder portion of the small-diameter cylinder electrode is inserted in the large-diameter cylinder electrode thereby forming the electron lens. The small-diameter cylinder portion extending in the tube axis direction of the large-diameter cylinder electrode and connected to the large-diameter cylinder electrode is expanded or bulged, or the bottom portion of the large-diameter cylinder electrode is removed while only the electrode support portion connected to the large-diameter cylinder electrode is left, so that the electrode support fixed to the outer surface of the small-diameter cylinder portion of the small-diameter cylinder electrode can pass therethrough.
REFERENCES:
patent: 4271374 (1981-06-01), Kimura
patent: 4728846 (1988-03-01), Yasuda
patent: 4904898 (1990-02-01), Penird et al.
Asano Tetsuo
Hirota Katsumi
Nakamoto Hiroshi
Suzuki Nobuyuki
Tanaka Yasuo
Hitachi , Ltd.
Patel Nimeshkumar D.
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