High-intensity discharge lamp with particular metal halide...

Details High-intensity discharge lamp with particular metal halide... High-intensity discharge lamp with particular metal halide...

2007-07-17

2007-07-17

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S634000

Reexamination Certificate

active

10790174

ABSTRACT:
A high-intensity discharge lamp connected to a lighting device has various superior emission properties such as efficiency. The discharge lamp includes a translucent ceramic discharge vessel, in which a pair of electrodes and a discharge medium are inserted. The lamp further includes an outer jacket, in which the arc tube is disposed, and a pair of feeder members. The discharge medium has metal halides including those of Na, Tl and Tm or Na, Tl, In and Tm, and the ratio (MTm/M) of the weight of the gross sealed mass M of the metal halides to the filled mass MTm of the Tm halide is about 0.4≦MTm/M≦0.9. The deviation in chromaticity (d.u.v.) on the x-y chromaticity coordinates (CIE 1931) for the overall operating position during the life of the lamp is within the range of about −0.006 to +0.010.

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