公开(公告)号：US20060274279A1

公开(公告)日：2006-12-07

申请号：US11446302

申请日：2006-06-05

申请人： Shoichi Yoshii ,  Hisashi Okada

发明人： Shoichi Yoshii ,  Hisashi Okada

IPC分类号： G03B21/18

CPC分类号： G03B21/10 ,  G03B21/16 ,  G03B21/2066 ,  G03B21/28 ,  H04N9/3105 ,  H04N9/3144

摘要： The present invention has an objective to provide a projection display device of a U-shape structure with an illumination optical system folded by a mirror, which reduces heat load without using a mirror made of heat-resistant glass to fold light from a light source. A projection display device that folds light from a light source 1 composed of a lamp 1a and a parabolic metallic reflector 1b by a cold mirror 2 to be applied to light modulating elements 10B, 10G, 10R through fly-eye integrators 3, 4, thereby enlarging and projecting the light modulated by the light modulating element through a projection lens 20, wherein a cold mirror 2 is cooled by cooling air from a fan 32, ultraviolet and infrared rays transmitted through the cold mirror 2 are emitted out of a cabinet 30, so that retroreflection of ultraviolet and infrared rays to a lamp 1a is prevented.

摘要翻译： 本发明的目的是提供一种具有由反射镜折叠的照明光学系统的U形结构的投影显示装置，其不使用由耐热玻璃制成的反射镜来折射来自光源的光而降低热负荷。 一种投影显示装置，其通过用于通过飞眼积分器施加到光调制元件10B，10G，10R的冷镜2来折叠由灯1a和抛物面金属反射器1b构成的光源1的光 通过投影透镜20对由光调制元件调制的光进行放大和投影，其中通过来自风扇32的冷却空气来冷却冷镜2，透射通过冷镜2的紫外线和红外线被射出 使得防止紫外线和红外线向灯1a的逆向反射。