Display tube having an inner curvature compensating for floating

Details Display tube having an inner curvature compensating for floating Display tube having an inner curvature compensating for floating

1998-02-19

2000-10-17

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Envelope

313461, 220 21A, H01J 3100, H01J 2910, H01J 6130, H01K 128

Patent

active

061336866

ABSTRACT:
A color cathode ray tube panel has a glass face portion including a substantially flat outer surface facing a viewer and an inner surface on which a phosphor screen is coated. The inner surface is concavely curved with a radius of curvature R.sub.x in a direction of a horizontal axis of the cathode ray tube, and the following conditions are satisfied: ##EQU1## where W.sub.h denotes a horizontal width of an effective area of picture in the face portion, L denotes an optimum viewing distance, n.sub.1 denotes a refractive index of the face portion, and t denotes a thickness of the face portion at its center.

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Patent Abstract of Japan, vol. 018, No. 252 (E-1547), May 13, 1994, and JP 06 036710 A (Hitachi Ltd.), Publication No. 06036710, Published Oct. 2, 1994, Application No. 04193657 (Abstract).

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