Lightening device for metal halide discharge lamp

Details Lightening device for metal halide discharge lamp Lightening device for metal halide discharge lamp

2006-06-06

2006-06-06

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S640000, C313S638000, C313S643000

Reexamination Certificate

active

07057349

ABSTRACT:
A metal halide discharge lamp which essentially permits disusing mercury is provided. The metal halide discharge lamp comprises a refractory and transparent hermetic vessel, a pair of electrodes fixed to the hermetic vessel, and a discharge medium sealed in the hermetic vessel and containing a first halide, a second halide, and a rare gas. The first halide is a halide of a metal which achieves a desired light emission. The second halide has a relatively high vapor pressure, being at least one halide of metal which is unlikely to emit a visible light compared with the metal of the first halide and acts as a buffer gas.

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