发明名称 |
OPTICAL STACK AND LIGHTGUIDES |
摘要 |
Light directing film is disclosed. The light directing film includes a first structured major surface and an opposing second major surface. The first structured major surface includes a plurality of unitary discrete structures. Each unitary discrete structure includes a light directing portion that is primarily for directing light and includes a plurality of first side facets. Each first side facet makes an angle with the plane of the light directing film in a range from about 35 degrees to about 55 degrees. Each light directing portion also includes a first base that is defined by the plurality of first side facets and has a first minimum dimension. Each light directing portion also has a first maximum height. Each unitary discrete structure also includes a bonding portion that is primarily for bonding the light directing film to a surface. The bonding portion is disposed on and between the plurality of first side facets and includes a plurality of second side facets. Each second side facet makes an angle with the plane of the light directing film greater than about 70 degrees. The bonding portion also includes a second base that is defined by the plurality of second side facets and has a second minimum dimension less than about 10% of the first minimum dimension. The bonding portion also has a second maximum height. The ratio of the second maximum height to the second minimum dimension is at least about 1.5. |
申请公布号 |
EP2558889(A1) |
申请公布日期 |
2013.02.20 |
申请号 |
EP20110715367 |
申请日期 |
2011.04.11 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
EDMONDS, WILLIAM F.;LIU, TAO;VAN DERLOFSKE, JOHN F. III;WHEATLEY, JOHN A. |
分类号 |
G02B5/04;G02B6/00;G02F1/13357 |
主分类号 |
G02B5/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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