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US 2009/0213460 A1Published application
Light diffusion film
AssigneeNitto Denko Corporation
InventorsHideyuki YONEZAWA, Minoru MIYATAKE, Akinori NISHIMURA
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Abstract
A light diffusion film 20 having a wide diffusion range of light can be obtained by using 1) fibers 21 having a large refractive index difference from a transparent resin 22, and/or 2) fibers 21 which comprise two kinds of birefringent regions 21A and 21B wherein one birefringent region is included inside of the other birefringent region.
Claims17
A light diffusion film comprising:
- a plurality of columnar fibers arranged substantially parallel to each other;
- and
- an optically isotropic transparent resin for bonding the fibers,
- wherein the fibers comprise a first birefringent region in which the fibers extend in a major axis direction and a second birefringent region included inside of the first birefringent region, and wherein an absolute value |n2−n0| of the difference between a refractive index n2 in a major axis direction of the second birefringent region and a refractive index no of the transparent resin is 0.03 or more.
1 more element
Dependencies are inferred from the claim text.