Monochrome CRT having curved display window with reduced transmi

Details Monochrome CRT having curved display window with reduced transmi Monochrome CRT having curved display window with reduced transmi

1993-03-04

1999-05-11

O'Shea, Sandra

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

H01S29/20

Patent

active

059030895

ABSTRACT:
The bulls-eye effect produced in the projected image by projection television cathode ray display tubes with convexly curved faceplates and multi-layer interference filters is compensated by using darkened or tinted glass. Since the faceplate glass is thicker in the center, more attenuation of the light output occurs there than at the edges of the display window where the glass is thinner, resulting in improved luminance uniformity of the display.

REFERENCES:
patent: 4132919 (1979-01-01), Maple
patent: 4376829 (1983-03-01), Daiku
patent: 4405881 (1983-09-01), Kobayashi
patent: 4521524 (1985-06-01), Yamashita
patent: 4755868 (1988-07-01), Hodges
patent: 4769347 (1988-09-01), Cook et al.

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