Lamp incorporating phosphor blend of calcium fluorophosphate and

Details Lamp incorporating phosphor blend of calcium fluorophosphate and Lamp incorporating phosphor blend of calcium fluorophosphate and

1987-03-05

1987-10-06

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014H, 2523014P, 2523016P, H01J 6144

Patent

active

046985484

ABSTRACT:
Calcium fluorophosphate phosphor co-activated by specific levels of antimony and manganese emits in a narrow portion of the yellow region of the spectrum making such phosphor useful in fluorescent lamps. Furthermore, when blended in specific proportions with a blue-emitting divalent europium activated strontium halophosphate, and incorporated into a fluorescent lamp, the resultant lamp gives an increased lumen per watt output over a "cool white" lamp incorporating a standard "cool white" calcium halophosphate phosphor.

REFERENCES:
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patent: 2488733 (1949-11-01), McKeag et al.
patent: 2965786 (1960-12-01), Aia et al.
patent: 3549552 (1970-12-01), Broekhoven
patent: 3555336 (1971-01-01), Koedam
patent: 3670194 (1972-06-01), Thornton et al.
patent: 3886396 (1975-05-01), Hammer et al.
patent: 4038204 (1977-07-01), Wachtel
patent: 4075532 (1978-02-01), Piper et al.
Fonda "J. of the Optical Soc. of America", vol. 40, No. 6, 1950, pp. 347-352.
Botden "Philips. Res. Repts.", 7, 1952, pp. 192, 214, 215.
Walter "Applied Optics", 1971, vol. 10, pp. 1108-1113.
Kruithof "Fluorescent Lamp Lighting" edited by Elenbaas, Chapter III, pp. 31-33, 42-44 (1962).

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