High-pressure mercury lamp, lamp unit, and image display device

Details High-pressure mercury lamp, lamp unit, and image display device High-pressure mercury lamp, lamp unit, and image display device

2006-03-14

2006-03-14

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S639000

Reexamination Certificate

active

07012374

ABSTRACT:
A high-pressure mercury lamp is provided that includes a transparent envelope made of quartz glass, in which mercury, halogen, and a rare gas are sealed and a pair of electrodes provided in the transparent envelope. The amount of the halogen sealed in the transparent envelope is in the range from 1.0×10−6μmol/mm3to 1.0×10−2μmol/mm3, and 2.5 mol % to 25 mol % of oxygen with respect to the amount of the halogen is present in the transparent envelope. The high-pressure mercury lamp can prevent blackening of an inner wall of the transparent envelope from occurring over a long period of lighting without deteriorating the startability or lamp characteristics, thus achieving a long life.

REFERENCES:
patent: 3783328 (1974-01-01), Neumann
patent: 5109181 (1992-04-01), Fischer et al.
patent: 6271628 (2001-08-01), Sugitani et al.
patent: 11-149899 (1999-06-01), None

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