发明授权
- 专利标题： Dry erasable projection article and system
- 专利标题（中）： 干式可擦式投影物品和系统
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申请号： US12684565申请日： 2010-01-08
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公开(公告)号： US08220932B2公开(公告)日： 2012-07-17
- 发明人: Yufeng Liu , Encai Hao , David T. Yust , Lan H. Liu , Frederick J. Gustafson , Willem V. Bastiaens , Yu Yang
- 申请人： Yufeng Liu , Encai Hao , David T. Yust , Lan H. Liu , Frederick J. Gustafson , Willem V. Bastiaens , Yu Yang
- 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 Robert H. Jordan
- 主分类号： G03B21/26
- IPC分类号： G03B21/26 ; G03B21/28 ; G03B21/56 ; G03B21/60 ; G02B27/14 ; G02F1/1335 ; H01K1/26 ; F21V9/14 ; B43L1/00
摘要：
A communication article and system comprising a writing member having a dry erasable front surface and a projection member is disclosed. The projection member includes an asymmetric optical diffuser that scatters light in a first direction with a first viewing angle AH, and in a second direction orthogonal to the first direction with a second viewing angle AV. The ratio AH/AV is at least about 2.
公开/授权文献
- US20100171929A1 DRY ERASABLE PROJECTION ARTICLE AND SYSTEM 公开/授权日：2010-07-08
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