Light directing structures
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 3, 2020
Grant Date -
May 9, 2019
app pub date -
Dec 29, 2018
filing date -
Oct 27, 2011
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Abstract
Light directing film structure employing at least two layers having different refractive indices and forming a continuous corrugated boundary between major surfaces of the film. The corrugated boundary forms a plurality of alternating facets forming different dihedral angles with a prevalent plane of the film structure. The facets may longitudinally extend along a straight, arcuate, circular, or curvilinear path. Light received by a major surface of the film structure is internally redirected by interacting with the facets of the corrugated inter-layer boundary and may be emitted from the opposing major surface towards a new propagation direction which is different from the original propagation direction.
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