| 摘要 |
PROBLEM TO BE SOLVED: To improve the heat dissipation efficiency of a light source lamp device employing a high luminance discharge lamp. SOLUTION: A lamp mounting part 20 is formed in the casing of a liquid crystal projector device. The lamp mounting part 20 is composed of a lamp mounting box 21 and a cooling fan 22, and a replacement lamp unit 10 can be inserted into or extracted from the lamp mounting box 21 by picking a rear handle 13. When the replacement lamp unit 10 is inserted into the lamp mounting box 21, the position of lamp is so fixed as to be set at a predetermined position for a light source. A ventilation window 23 is bored in the lamp mounting box 21. The ventilation window 23 is located at a position facing to a ventilation window 14 of a replacement lamp case 11 with the replacement lamp unit 10 inserted. The normally closed ventilation window 14 is formed in the replacement lamp unit 10, the ventilation window 23 is opened only when the replacement lamp unit 10 is inserted into the lamp mounting box 21 installed in the casing, and the air flow of the cooling fan 22 is entered into the inside of a concave reflecting mirror. |
