| 摘要 |
<p>This projector device is equipped with a cooling mechanism which continuously maintains the temperature difference between a bulb upper part (12a) and a bulb lower part (12b) in a discharge lamp (11) within an appropriate range, even if said projector device is installed at an arbitrary inclination. In order to cool the discharge lamp, cooling air generated by first and second cooling fans (53, 54) is conveyed via first and second ducts (71, 72) into first and second lamp-cooling air inlets (21, 22) of the discharge lamp, and is blown into the discharge lamp. The first and second lamp-cooling air inlets (21, 22) are disposed so as to be symmetrical with respect to the optical axis of the discharge lamp, and are divided into a plurality of air inlets (21a-21c, 22a-22c) each having different opening surface areas. Having passed through the plurality of air inlets and diverging into a plurality of air currents, the cooling air (f1a-f1c, f2a-f2c) is respectively blown to different parts of the discharge lamp. The rotational frequency of the first and second cooling fans is optimally controlled in accordance with the installation position (S) of the projector device.</p> |
