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公开(公告)号:US20100171929A1
公开(公告)日:2010-07-08
申请号:US12684565
申请日:2010-01-08
申请人: Yufeng LIU , Encai HAO , David T. YUST , Lan H. LIU , Frederick J. GUSTAFSON , Willem V. BASTIAENS , Yu Yang
发明人: Yufeng LIU , Encai HAO , David T. YUST , Lan H. LIU , Frederick J. GUSTAFSON , Willem V. BASTIAENS , Yu Yang
CPC分类号: G03B21/56
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.
摘要翻译: 公开了一种包括具有干燥可擦除前表面和突出构件的书写构件的通信物品和系统。 所述突出部件包括使第一方向的光以第一视角AH散射的第二方向和与第一方向正交的第二方向的第二视角AV的非对称光漫射体。 AH / AV的比例至少约为2。