Patent ID: 7585076
Filing Date: 2009-09-08
Classification: F28F,G03B,H04N,Y10T

Abstract:
1. A method of manufacturing a cooling unit, the cooling unit including a cooling plate in which a cooling fluid is allowed to flow, the cooling plate having a pair of plate members oppositely arranged to sandwich a cooling tube in which the cooling fluid is to flow, the method comprising: forming a groove for receiving the cooling tube, in at least one opposing surface of a plate member of the pair of plate members; forming at least one projection at a point adjacent to the groove, the projection protruding toward the groove; joining each of the plate members of the pair and the cooling tube together by receiving the cooling tube in the groove; in joining, an external force being applied to at least one plate member of the pair, whereby deformation is caused in the at least one projection, the deformed projection being directly engaged with an outer surface of the cooling tube; forming a light source device; forming an optical device including a light modulation element for modulating a luminous flux emitted from a light source according to image information and forming an optical image, the light modulation element being held in the cooling unit; and forming a projection optical device for projecting, with magnification, an optical image formed by the optical device.