Mercury free metal halide lamp

Details Mercury free metal halide lamp Mercury free metal halide lamp

2005-09-26

2008-08-26

Ton, Toan (Department: 2889)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S484000, C313S637000, C313S567000

Reexamination Certificate

active

07417375

ABSTRACT:
In a metal halide lamp, xenon gas having a pressure of at least 3 atmospheres at room temperature and at least a metal halide including indium iodide are sealed in a discharge space not containing mercury. If the volume of the discharge space is denoted by V (mm3), the electric power applied to the arc tube by P (W), and the weight of the indium iodide by X (μg), these parameters are set so as to satisfy a relationship (P/V)(X/V)0.2>3.0. A continuous emission spectrum can thereby be produced by indium over the entire visible wavelength range, thus obtaining a mercury-free metal halide lamp that is usable as an excellent white light source suitable for data projectors, automobile lamps, headlights, and other systems and devices.

REFERENCES:
patent: 6069456 (2000-05-01), Fromm et al.
patent: 6265827 (2001-07-01), Takahashi et al.
patent: 6653801 (2003-11-01), Takeda et al.
patent: 2004/0256991 (2004-12-01), Minamihata et al.
patent: 3-152852 (1991-06-01), None
patent: 90120800 (1997-05-01), None
patent: 2000-90880 (2000-03-01), None

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