Patent ID: 7819532
Filing Date: 2010-10-26
Classification: G03B,H04N

Abstract:
1. A projector comprising: a light source device; a light modulation device that modulates a luminous flux output from the light source device; a projection optical device that magnifies and projects the luminous flux modulated in the light modulation device; and an exterior casing that accommodates the light source device, the light modulation device, and the projection optical device arranged within, the projector arranged so as to be installed in a desktop mount position in which the projector is mounted on a predetermined location and a ceiling suspension position in which the projector is provided opposite in the vertical direction relative to the desktop mount position, the light source device including a light source device main body having a light source lamp in which discharge emission is performed between a pair of electrodes and an elliptic reflector having a nearly ellipsoidal reflection surface and converging and outputting a luminous flux radiated from the light source lamp in a certain direction, and a parallelizing lens that parallelizes the converged light of the elliptic reflector, wherein a lens supporting part that supports the parallelizing lens and makes a position of the parallelizing lens relative to the light source device main body changeable according to the position of the projector is provided, the lens supporting part is arranged so as to be movable in the vertical direction, an elastic member that locates the lens supporting part in a predetermined position in the vertical direction by elastic force is provided, a pressing surface extending nearly perpendicularly to the vertical direction is formed in the lens supporting part, and an operation hole for moving the lens supporting part against the elastic force of the elastic member to a position in planar interference with the pressing surface in the vertical direction is formed in a bottom face in the exterior casing.