Patent ID: 7258465
Filing Date: 2007-08-21
Classification: G03B,H04N,H05K

Abstract:
1. A projector comprising: a light source lamp including a light source, a reflector in a recessed shape provided to cover the light source for reflecting light from the light source, and a flange portion provided at an end portion of the reflector; a lamp case attached with the light source lamp; a cooling fan for maintaining a temperature of the light source lamp at a predetermined temperature; and a heat radiating member for cooling an outer peripheral face of the light source lamp, comprising: wherein the heat radiating fin portion is formed of a shape memory alloy, is brought into close contact with the outer peripheral face of the light source lamp when a temperature at a vicinity of the outer peripheral face of the light source lamp becomes higher than the predetermined temperature, and is separated from the outer peripheral face of the light source lamp when the temperature at the vicinity of the outer peripheral face of the light source lamp becomes lower than the predetermined temperature; and wherein the heat radiating fin portion includes a fin portion arranged to guide a wind blown from the cooling fan to the side of the outer peripheral face of the light source lamp, and an opening portion for escaping the wind blown from the cooling fan guided by the fin portion to the side of the outer peripheral face of the light source lamp.