发明授权
- 专利标题: Projection display device for multimedia and wall display systems
- 专利标题(中): 多媒体和墙壁显示系统的投影显示设备
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申请号: US11003252申请日: 2004-12-03
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公开(公告)号: US07271964B2公开(公告)日: 2007-09-18
- 发明人: Ernesto M. Rodriguez, Jr. , Patricia M. Hughes , William E. Haushalter , Kai Chang Lu
- 申请人: Ernesto M. Rodriguez, Jr. , Patricia M. Hughes , William E. Haushalter , Kai Chang Lu
- 申请人地址: US MN St. Paul
- 专利权人: 3M Innovative Properties Company
- 当前专利权人: 3M Innovative Properties Company
- 当前专利权人地址: US MN St. Paul
- 代理商 Gregg H. Rosenblatt
- 主分类号: G02B13/04
- IPC分类号: G02B13/04 ; G02B15/14 ; H04N5/64 ; H04N9/31
摘要:
A front projection display device includes an optical engine including an illumination system, an imaging system, and projection optics. The projection optics include a first lens group of negative refractive power that has at least one aspheric surface. The projection optics output an image at a half field angle of at least 45°, where the image has substantially no distortion. For example, when the first lens group is placed at a distance of less than 1 meter from a viewing screen, the output image has a size of about 40 inches diagonal or greater, and requires substantially no keystone correction. In other aspects, the optical engine can be implemented in a wall-mounted projection system, a multimedia system, a compact integrated monitor system, and a portable projection unit.
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