Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1985-03-07
1990-02-06
Yusko, Donald J.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
H01J 2958
Patent
active
048990795
ABSTRACT:
In a color display tube including an envelope, a display screen, an electron gun system for producing and focusing a plurality of electron beams directed at the display screen, and coils for deflecting the beams, convergence of the beams independently of focusing is effected by a helically wound resistive element disposed in the envelope between the electron gun system and the deflection coils. The element surrounds the electron beams and is dimensioned such that, when predetermined potentials are applied thereto, a potential gradient is produced along its length which establishes a relatively large diameter, strong convergence lens through which the beams pass.
REFERENCES:
patent: 2123636 (1938-07-01), Schwartz
patent: 3011090 (1961-11-01), Moodey
patent: 3143681 (1964-08-01), Schlesinger
patent: 3223871 (1965-12-01), Schlesinger
patent: 3374386 (1968-03-01), Charbonnier et al.
patent: 3909655 (1975-09-01), Grimmett et al.
Beirens Leopold C. M.
Van Gorkum Aart A.
Vrijssen Gerardus A. H. M.
Kraus Robert J.
O'Shea Sandra L.
U.S. Philips Corporation
Yusko Donald J.
LandOfFree
Cathode ray tube does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cathode ray tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathode ray tube will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-443484