Electric lamp and discharge devices – Cathode ray tube – Ray generating or control
Patent
1996-09-16
2000-02-22
Patel, Nimeshkumar D.
Electric lamp and discharge devices
Cathode ray tube
Ray generating or control
313409, 313412, 313413, 313414, H01J 2946, H01J 2950
Patent
active
060283920
ABSTRACT:
An in-line type color Braun tube includes a shield cup electrode which opens at the side facing a fluorescent surface of the tube, provided at the end of an electron gun, wherein the shield cup electrode comprises a cylindrical side wall for shielding three electron beams generated by the electron gun from influences of electrostatic charge accumulated at a wall surface of a glass bulb of the tube, a base plate having three beam passing holes aligned in the horizontal direction, and two cylinders made of non-magnetic and conductive material, for suppressing eddy current induced at the shield cup electrode, each of the two cylinders surrounding one of two paths of electron beams passing through both side holes of the three beam passing holes, projecting from a surface facing the fluorescent surface, of the base, in the direction facing the fluorescent surface.
REFERENCES:
patent: 4396862 (1983-08-01), Hughes
patent: 4593226 (1986-06-01), Naiki
patent: 4633130 (1986-12-01), McCandless
patent: 4659961 (1987-04-01), Naiki
patent: 4825122 (1989-04-01), Kakesu et al.
patent: 4877993 (1989-10-01), Ogasa
patent: 5703430 (1997-12-01), Dekker
Kida Hidetoshi
Koizumi Makoto
Maehara Mutsumi
Miyazawa Hiroshi
Haynes Mack
Hitachi , Ltd.
Patel Nimeshkumar D.
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