Brightness enhancement film and backlight module
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United States of America Patent
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Jan 29, 2013
Grant Date -
Jun 16, 2011
app pub date -
Nov 24, 2010
filing date -
Dec 14, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A brightness enhancement film including a light transmissive substrate, convex lens portions, concave lens portions, and a reflective layer is provided. The light transmissive substrate has a first surface and a second surface opposite to the first surface. The convex lens portions are disposed on the first surface. Each of the convex lens portions has a curved convex surface facing away from the light transmissive substrate. The concave lens portions are disposed on the first surface. The convex lens portions and the concave lens portions are alternately arranged. Each of the concave lens portions has a curved concave surface facing away from the light transmissive substrate. A wavy continuous curve surface is formed by the curved convex surfaces and the curved concave surfaces. The reflective layer is disposed on the second surface and has light passing openings respectively on the optical axes of the convex lens portions.
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