Luminance enhancement film having a substrate incorporating dispersed particles for diffusion

摘要

A luminance enhancement film having a built-in light diffusing structure. The support substrate incorporates a dispersion of particles for light diffusion. In accordance with the present invention, a separate particle layer is not required in addition to the support substrate layer. The particles are integrated in the unitary support substrate layer. In one aspect of the present invention, the particles are dispersed near at least one of the planar surfaces of the support substrate (i.e., the light input surface light output surface or both of the support substrate. All the particles may be embedded below the surface of the support substrate, or some of the particles may protrude above the surface of the support substrate. In one embodiment of the present invention, the support substrate contains particles that are dispersed only close to its surface and form protrusions at the surface (i.e., the particle dispersed surface is not smooth).

主权项

1. A luminance enhancement film, comprising:
an optical substrate, which comprises a light input surface and a structured light output surface at two opposite sides of the optical substrate; and a support substrate, which comprises a unitary body having a light input surface and a light output surface at two opposite sides of the unitary body, wherein the light output surface of the unitary body faces the light input surface of the optical substrate; wherein a plurality of particles are dispersed in at least one of a first surface region at the light input surface of the unitary body and a second surface region at the light output surface of the unitary body, wherein the first surface region has a first thickness substantially less than the thickness of the unitary body and the second surface region has a second thickness substantially less than the thickness of the unitary body.