Cathode ray tube that minimizes mislanding of electron beams due

Details Cathode ray tube that minimizes mislanding of electron beams due Cathode ray tube that minimizes mislanding of electron beams due

1995-06-06

1997-09-02

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Screen

313477R, 313408, 220 21A, H01J 2986, H01J 3100

Patent

active

056636105

ABSTRACT:
When an outer surface of an effective portion 20 of a panel 20 is substantially spherical, a diagonal axis of the effective portion, a long axial effective diameter, land a short axial effective diameter are Sd, Sh, and Sv, the panel is shaped to satisfy the relationship, Dp/Sd<0.05, V<H<D, 2V<Dp<2H where Dp an amount of drop at an end of the effective diameter of the diagonal axis, H an amount of drop at the end of the effective diameter of the long axis, V an amount of drop at the end of the effective diameter of the short axis, the relationship, Ah/Sh<A/Sv where Ah a distance in the long axial direction of a thicker region on the long axis and Av a distance in the short axial direction of the thicker region on the short axis, wherein, in the thicker region, the panel has a thickness larger than the average thickness Ta of the effective portion, and the relationship between a maximum thickness T max and a minimum T min, (Tmax-Ta)>(Ta-Tmin) or .vertline.T max-Ta.vertline.>.vertline.T min-Ta.vertline..

REFERENCES:
patent: 4535907 (1985-08-01), Tokita et al.
patent: 4570101 (1986-02-01), Campbell
patent: 4777401 (1988-10-01), Hosokoshi et al.
patent: 4881004 (1989-11-01), Inoue et al.
patent: 4985658 (1991-01-01), Canevazzi
patent: 5107999 (1992-04-01), Canevazzi
patent: 5151627 (1992-09-01), Van Nes et al.
patent: 5495140 (1996-02-01), Fujiwara et al.

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