Cathode ray tube

Details Cathode ray tube Cathode ray tube

1997-05-13

1998-06-09

Patel, Nimeshkumar

Electric lamp and discharge devices

Cathode ray tube

Envelope

H01J 2986

Patent

active

057639957

ABSTRACT:
This cathode ray tube includes a vacuum envelope having a substantially rectangular panel, a funnel formed contiguous to the panel, and a cylindrical neck formed contiguous to the small-diameter end portion of the funnel, an electron gun assembly disposed in the neck to generate electron beams, and a deflection yoke mounted on the outer side of the funnel near the neck side over a predetermined range to form a magnetic field in the funnel, thereby deflecting the electron beams along the major and minor axes of the panel. Of the predetermined range of the funnel, at the neck side, the funnel is formed to have an outer shape with a section which is gradually deformed, from the neck side to the panel side, from a circular shape to a non-circular shape having a maximum diameter along a direction other than the major and minor axes. The funnel of the predetermined range is formed to have an outer shape with a section that satisfies a relation:

REFERENCES:
patent: 3731129 (1973-05-01), Tsuneta et al.
patent: 5258688 (1993-11-01), Fondrk

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