Backlight apparatus with particular light-redirecting film
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United States of America Patent
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Issued Date -
Feb 14, 2008
app pub date -
Jul 17, 2006
filing date -
Jul 17, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A backlight apparatus comprises (a) a light source; (b) a light guiding plate; and (c) a light redirecting article for redirecting light toward various angles, the light redirecting article comprising a plurality of prismatic structures with a selected apex angle, a selected first base angle, a selected second base angle and comprising a material having a selected refractive index value, the selections being sufficient to provide improved luminance at a 60.degree. polar angle wherein the prismatic structures are essentially parallel to the length direction of the light guiding plate.
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