Lamp unit and projection display apparatus

Details Lamp unit and projection display apparatus Lamp unit and projection display apparatus

2006-03-29

2009-06-02

Payne, Sharon E (Department: 2875)

Illumination

Light source and modifier

With ventilating, cooling or heat insulating means

C362S218000, C362S373000, C362S547000, C353S057000, C353S061000

Reexamination Certificate

active

07540633

ABSTRACT:
In lamp unit10having light source lamp1, reflector2for reflecting light from light source lamp1, reflector holding member11, and reflector cover15, a plurality of cooling holes18aare formed in a region of reflector holding member11provided with lamp unit positioner16a. Cooling holes18aare open toward an upper bulb area, a lower bulb area, and a cathode of the light source lamp, respectively. Stud22afor fixing reflector holding member11has a throughhole extending at the center thereof, so that cooling air fed from high static pressure blower27can be sent to cooling holes18through tube28and the throughhole of stud22a, thus efficiently cooling the upper bulb area, lower bulb area, and cathode of light source lamp1in a concentrative manner with a small amount of air. Thus, the resulting lamp unit, provided by the present invention, can reduce the amount of air required for cooling the lamp, and can use a high static pressure and small fan.

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