Light redirecting films and film systems
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United States of America Patent
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Jun 22, 2004
Grant Date -
Dec 20, 2001
app pub date -
Jul 19, 2001
filing date -
Feb 23, 1999
priority date (Note) -
Expired
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Abstract
Light redirecting films include a pattern of individual optical elements of well defined shape on the light exit surface of the films for refracting the light entering the entrance surface of the films from a backlight toward a direction normal to the exit surface. The individual optical elements overlap and intersect each other. Also, the orientation, size and/or shape of the optical elements may be tailored to redirect more of the incident light from the backlight within a desired viewing angle.
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