LIGHT REDIRECTING FILMS AND FILM SYSTEMS
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United States of America Patent
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app pub date -
Feb 18, 2011
filing date -
Feb 23, 1999
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Abstract
An optical assembly comprises a light emitting panel having a light output surface and a light redirecting film located to receive light emitted from the light output surface. The light output surface has a non-uniform directional light output distribution. The light redirecting film has a pattern of individual optical elements of well defined shape that vary at different locations on the light redirecting film to redistribute the light received from the light output surface within a desired light ray angle distribution.
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