Patent ID: 7140733

Claim:
A projector, comprising: a light source device having a light-emitting tube that includes a light-emitting portion that generates a light beam by an electric discharge between electrodes and sealing portions provided on both sides of the light-emitting portion and a heat-conductive member attached along the outer surface of at least one of the sealing portions, an end of the heat-conductive member being extended to a section near the light-emitting portion; and an optical system disposed on a light-irradiation side of the light source device, the optical system including an optical modulator that modulates a light beam irradiated by the light source in accordance with an input image information to form an optical image, and a color-combining optical device that combines each color light from the optical modulator, the heat-conductive member being a cylindrical component, the light source device including a reflector that reflects a light beam irradiated by the light-emitting portion of the light-emitting tube, the first sealing portion of the light-emitting tube being disposed on the side of the reflector and being fixed to the reflector through the cylindrical heat-conductive member attached to the first sealing portion, the first end of the heat-conductive member extending to the section near the light-emitting portion and a second end of the heat-conductive member opposite to the first end extending to the outside of the reflector with a heat-radiation fin being attached to the second end, a heat-conductive sub-reflection mirror opposing to the reflector being attached to the second sealing portion of the light-emitting tube, and a heat-conductive transparent member being attached to the outer surface of the sub-reflection mirror.