Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Adrian Travis0
Date of Patent
September 13, 2011
Patent Application Number
12444906
Date Filed
October 10, 2007
Patent Citations Received
...
Patent Primary Examiner
Patent abstract
A selectively light-reflecting sheet (30) includes a prismatic film (1) with parallel prisms (10) on its face, a low-index film (3) on the prisms and a layer (5) on the low-index film, this layer having a substantially flat surface. This results in a low effective index, which means that light incident at steeper angles on the prismatic film (1) will pass through it. This “leaky” effect can be used in conjunction with a reflector sheet (20) in a tapered-waveguide arrangement to construct a lightweight backlight.
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