| 简介 |
PROBLEM TO BE SOLVED : To provide a high-pressure discharge lamp capable of lowering a lamp current even if mercury is not used, and of optimizing a light emission spectrum of the discharge lamp to match the balance of light after passing through a liquid crystal device.
SOLUTION : The high-pressure lamp is provided with a fire-resistant and transparent airtight vessel and electrodes sealed to the airtight vessel, and is filled with light-emitting materials and a rare gas. The high-pressure discharge lamp is structured such that one or more kinds of halides selected from dysprosium halide, thulium halide, yttrium halide, holmium halide, ruthenium halide, erbium halide and terbium halide, and a second halide having vapor pressure higher than that of the first halide are added as the light-emitting materials; and the rare gas is filled at a pressure of 15 to 30 atmospheres.
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