Patent ID: 9678415
Date: 2017-06-13
CPC Classifications: G03B

Claim:
1. A projector device which projects an image by use of a discharge lamp as a light source, comprising: a cooling mechanism configured to lead cooling air generated by a first cooling fan and a second cooling fan to a first lamp-cooing air inlet and a second lamp-cooing air inlet via a first duct and a second duct, respectively, and configured to blow the first and second cooling air to the discharge lamp in order to cool the discharge lamp; an installation angle sensor configured to detect an installation position of the projector device; and a cooling control section configured to control a rotational frequency of the first and second cooling fans in accordance with the installation position detected by the installation angle sensor, wherein the first and second lamp-cooing air inlets are disposed symmetrically with respect to an optical axis of the discharge lamp, and the openings of the first and second lamp-cooing air inlets are disposed in the direction toward the optical axis of the discharge lamp, wherein the first and second lamp-cooing air inlets are each divided into a plurality of air inlets having a different opening area from each other, and each opening of the plurality of divided air inlets are arranged symmetrically about a point with respect to the optical axis of the discharge lamp, and wherein cooling air is divided into a plurality of currents of the cooling air through the plurality of air inlets, the plurality of currents of the cooling air different in an amount according to the opening area of every air inlets being blown to a different part of the discharge lamp.