Light source apparatus and projector

A projector comprising:

• a plurality of light sources for emitting illumination light;
• a heat-absorbing member for absorbing heat that the plurality of light sources generate;
• a heat-radiating part for radiating the heat;
• a heat-transporting part including a heat pipe which is thermally connected to the heat-absorbing member and the heat-radiating part and which transfers the heat;
• an illumination optical part which optically acts on the illumination light so that the illumination light emitted from the light sources illuminates an illumination area;
• an image modulation device which is disposed at the illumination area and which modulates the illumination light irradiating the illumination area according to an input image signal and outputs modulated light;
• and
• a projection optical part which is disposed at a front of a chassis and which projects the modulated light output from the image modulation device onto a projection area as an image,
• wherein the heat-radiating part is disposed further rearward in the chassis than the heat-absorbing member and is disposed such that, when the chassis is suspended from a flat suspension surface such as a ceiling, the heat pipe of the heat-transporting part is parallel to the suspension surface, or, a distance between the suspension surface and a heat-radiating end of the heat pipe is smaller than a distance between the suspension surface and a heat-absorbing end of the heat pipe.

A projector comprising:

• a plurality of light sources for emitting illumination light;
• a heat-absorbing member for absorbing heat that the plurality of light sources generate;
• a heat-radiating part for radiating the heat;
• a heat-transporting part including a heat pipe which is thermally connected to the heat-absorbing member and the heat-radiating part and which transfers the heat;
• an illumination optical part for optically acting on the illumination light so that the illumination light emitted from the light sources illuminates an illumination area;
• an image modulation device which is disposed at the illumination area and which modulates the illumination light irradiating the illumination area according to an input image signal and outputs modulated light;
• and
• a projection optical part which is disposed at a front of a chassis and which projects the modulated light output from the image modulation device onto a projection area as an image,
• wherein the heat-radiating part is disposed at a position in the chassis further frontward than the heat-absorbing member and is disposed such that, when the chassis is mounted to a flat mounting surface such as a table or floor, the heat pipe of the heat-transporting part is parallel to the mounting surface, or, a distance between the mounting surface and a heat-radiating end of the heat pipe is larger than a distance between the mounting surface and a heat-absorbing end of the heat pipe.

A light source apparatus comprising:

• a plurality of light sources for emitting illumination light;
• a heat-absorbing member for absorbing heat that the plurality of light sources generate;
• a heat-radiating part for radiating the heat;
• a heat-transporting part including a heat pipe which is thermally connected to the heat-absorbing member and the heat-radiating part and which transfers the heat;
• a heat-pipe tilt-angle detecting part for detecting a heat-pipe tilt-angle representing a tilt-angle of the heat pipe of the heat-transporting part;
• and
• a light-level controlling part for controlling a light level which the light sources emit on the basis of the heat-pipe tilt-angle measured by the heat-pipe tilt-angle detecting part.

A light source apparatus comprising:

• a plurality of light sources for emitting illumination light;
• a heat-absorbing member for absorbing heat that the plurality of light sources generate;
• a heat-radiating part for radiating the heat;
• a heat-transporting part including a heat pipe which is thermally connected to the heat-absorbing member and the heat-radiating part and which transfers the heat;
• a cooling part which is capable of changing a cooling level;
• a heat-pipe tilt-angle detecting part for detecting a heat-pipe tilt-angle, which is a tilt-angle of the heat-pipe of the heat-transporting part;
• and
• a cooling-level controlling part for determining the cooling level of the cooling part on the basis of the heat-pipe tilt-angle measured by the heat-pipe tilt-angle detecting part.