Fluorescent lamps having reduced interference colors

Details Fluorescent lamps having reduced interference colors Fluorescent lamps having reduced interference colors

1991-12-11

1993-11-02

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313635, 313493, 313112, H01J 0162

Patent

active

052586898

ABSTRACT:
Fluorescent lamps having a tin oxide layer protected by a layer of colloidal alumina having a median particle diameter below 0.4 micron exhibit an objectionable pearlescent coloration if the alumina layer thickness is within the range of 500-8,000 .ANG.. This coloration is reduced to an acceptable level by incorporating from 10-30 wt. % of particulate alumina having a median diameter above 0.75 micron in the colloidal alumina.

REFERENCES:
patent: 2864966 (1958-12-01), Burns
patent: 3967153 (1976-06-01), Milke et al.
patent: 4020385 (1977-04-01), Lagos
patent: 4079288 (1978-03-01), Maloney et al.
patent: 4363998 (1982-12-01), Graff et al.
patent: 4379981 (1983-04-01), Rusch
patent: 4639637 (1987-01-01), Taubner et al.
patent: 5008789 (1991-04-01), Arai et al.
patent: 5045752 (1991-09-01), Jansma

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