Backlight with symmetric wedge shaped light guide input portion with specular reflective surfaces
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United States of America Patent
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-
Oct 27, 2009
Grant Date -
Nov 29, 2007
app pub date -
May 24, 2006
filing date -
May 24, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A backlight includes a visible light transmissive body having a light guide portion and a light input portion. The visible light transmissive body primarily propagates light by TIR and includes a light input surface and a light output surface. The light guide portion has a light reflection surface and a light emission surface. The light input portion has opposing side surfaces that are not parallel. A light source is disposed adjacent to the light input surface and emits light into the light input portion. A specularly reflective layer is disposed adjacent to but not in intimate contact with the opposing side surfaces and reflects more than 80% of visible light incident on the specularly reflective layer.
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Cited Art Landscape
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