Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Patent
1991-12-05
1993-03-30
DeMeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
313412, H01J 2951, H01J 2962
Patent
active
051987198
ABSTRACT:
An electron gun for a color cathode-ray tube for enhancing the convergence characteristics and removing the flare of beam spot formed at the boundary of screen, includes first and second grid electrodes and a first accelerating and focusing electrode each having first, second and third electron beam passing holes for allowing first, second and third electron beams emitted from cathodes to pass therethrough so as to be accelerated and focused; first and third slots formed around the first and third electron beam passing holes and having asymmetrical depth for allowing equipotential intervals at inner side to be larger than equipotential intervals at outer side, the first and third electron beam passing holes being symmetrical to each other with respect to the second electron beam passing hole; and a second slot formed around the second electron beam passing hole and provided with a symmetrical depth so as to have same equipotential interval at its inner and outer side with respect to the center of the second electron beam passing hole.
REFERENCES:
patent: 4523123 (1985-06-01), Chen
patent: 4701678 (1987-10-01), Blacker et al.
Abstract of Japan, vol. 8, No. 59 (E-232)(1496) Mar. 17, 1984.
Abstract of Japan, vol. 14, No. 154 (E-907)(4097) Mar. 23, 1990.
DeMeo Palmer C.
Goldstar Co. Ltd.
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