Cathode ray tube apparatus

Details Cathode ray tube apparatus Cathode ray tube apparatus

1997-09-18

1999-10-05

O'Shea, Sandra

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313477R, H01J 2970

Patent

active

059629649

ABSTRACT:
A cathode ray tube apparatus having a vacuum enclosure defined by a neck extending into a yoke portion and further extending into a panel including a screen, wherein a deflection yoke is fixed on the outer surface of the yoke portion which is formed between the screen and the neck of a vacuum enclosure. According to the invention, if the cross-sectional configuration of the yoke portion perpendicular to the tube axis at a reference deflection position is non-circular, e.g., barrel-like or rectangle-like, the aspect ratio of scanning of the screen is M:N, lengths LA, SA and DA are defined between a tube axis and intersection points of horizontal, vertical and diagonal axes and the outer periphery of the yoke portion at the reference deflection position, the following equation is established:

REFERENCES:
patent: 3731129 (1973-05-01), Tsuneta et al.
patent: 4754190 (1988-06-01), Hinotami et al.
patent: 5155411 (1992-10-01), Swank et al.
patent: 5258688 (1993-11-01), Fondrik
patent: 5319280 (1994-06-01), Vriens
patent: 5565731 (1996-10-01), Han

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