Low-power, high-pressure discharge lamp, particularly for genera

Details Low-power, high-pressure discharge lamp, particularly for genera Low-power, high-pressure discharge lamp, particularly for genera

1992-07-28

1994-11-08

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313 44, 313 45, 313113, 313571, 313620, 313635, 313639, 313642, 313643, H01J 6120

Patent

active

053630076

ABSTRACT:
To provide a fill in a low-power, high-pressure discharge lamp, which is capable of emitting light within a warm white light (WDL) color or neutral white light (NDL) color, that is, in the ranges of between about 2600 to 4600K, the fill has a relative relationship of sodium halide to scandium halide between 5:1 and 24:1, a relationship of sodium halide to thallium halide of 25:1 to 73:1, and a heat damming or heat retention or reflection coating (15, 16) is located at the end caps of the generally bulbous discharge vessel to provide for a cold spot temperature (Tc) of at least 800.degree. C., and preferably higher.

REFERENCES:
patent: 3514659 (1970-05-01), Gungle et al.
patent: 3842307 (1974-10-01), Dobrusskin et al.
patent: 3852630 (1974-12-01), Wesselink et al.
patent: 3979624 (1976-09-01), Liu et al.
patent: 4155025 (1979-05-01), Dobrusskin et al.
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patent: 4594529 (1986-06-01), de Vrijer
patent: 4709184 (1987-11-01), Keeffe et al.
patent: 4866342 (1989-09-01), Ramaiah et al.
patent: 4890030 (1989-12-01), Keeffe et al.
patent: 4948530 (1990-08-01), Barthelmes et al.
patent: 5239232 (1993-08-01), Heider et al.
"Technisch-wissenschaftliche Abhandlungen der Osram-Gesellschaft (Technolcal-Scientific Papers" of the Osram Company, published by Springer, Berlin-Heidelberg-New York-Tokyo, 1986, article by Dobrusskin, Fromm and Heider, vol. 12, pp. 10 through 19.

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