Color cathode ray tube having a low dynamic focus voltage

Details Color cathode ray tube having a low dynamic focus voltage Color cathode ray tube having a low dynamic focus voltage

1998-01-23

2000-02-15

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 315 15, 315382, H01J 2938, H01J 2962

Patent

active

060256745

ABSTRACT:
A color cathode ray tube includes a beam forming region, a main lens, a multipole lens and a lens for correction of curvature of the image field. The strength of the multiple lens for changing a cross-sectional shape of electron beams horizontally weakens in accordance with an increase of beam deflection. The lens for correction of curvature of the image filed changes trajectories of outer electron beams with respect to a enter electron beam in accordance with an increase of beam deflection.

REFERENCES:
patent: 5015910 (1991-05-01), Takahashi et al.
patent: 5212423 (1993-05-01), Noguchi et al.
patent: 5608284 (1997-03-01), Tojyou et al.
patent: 5739631 (1998-04-01), Tojyou et al.
"Enhanced Elliptical Aperture Lens Gun for Color Picture Tubes", S. Shirai, et al, Mobara Works, Hitachi, Ltd., 2320 Proceedings of the SID 31; No. 3, New York, US; Dec. 1990.

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