发明申请
- 专利标题: Projection display device
- 专利标题(中): 投影显示设备
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申请号: US11446302申请日: 2006-06-05
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公开(公告)号: US20060274279A1公开(公告)日: 2006-12-07
- 发明人: Shoichi Yoshii , Hisashi Okada
- 申请人: Shoichi Yoshii , Hisashi Okada
- 申请人地址: JP Moriguchi-shi
- 专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人地址: JP Moriguchi-shi
- 优先权: JP2005-165766 20050606
- 主分类号: G03B21/18
- IPC分类号: G03B21/18
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.
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