Fluorescent lamp with sharp emission peaks betwen 480 and 490 nm

Details Fluorescent lamp with sharp emission peaks betwen 480 and 490 nm Fluorescent lamp with sharp emission peaks betwen 480 and 490 nm

1978-10-25

1981-05-12

Segal, Robert

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313487, H01J 6304, H01J 162

Patent

active

042674859

ABSTRACT:
A fluorescent lamp having excellent color rendering property and high luminous efficiency comprises a fluorescent layer coated on an inner surface of a discharge tube.
The fluorescent layer mainly comprises a first fluorescent material having-emission peak in a range of wavelength of 480 to 490 nm which is an alkaline earth metal boron phosphate activated by a divalent europium compound having the formula

REFERENCES:
patent: 2143077 (1939-01-01), Leverene
patent: 2223426 (1940-12-01), McKeag et al.
patent: 2607014 (1952-08-01), Roy et al.
patent: 3416019 (1968-12-01), Kaduk
patent: 3748516 (1973-07-01), Blasse et al.
Elenbaas, Philips Technical Library, Fluorescent Lamps; edited by W. Elenbaas; English ed. 1971; The Macmillan Press Ltd., London; p. 100 cited, lines 18-24. _

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