Brightness enhancement film having curved prism units and microstructure layer
First Claim
1. A brightness enhancement film, said brightness enhancement film being arranged to be used in a liquid crystal display, comprising:
- a substrate including a first surface and a second surface substantially parallel to said first surface, and vertically transmitting light between the first surface and the second surface;
a plurality of curved prism units juxtaposed on the first surface of the substrate, each of the curved prism units having a longitudinal direction and including a ridge, a trough line, and at least one meandering surface located between said ridge and trough line, said ridge and said meandering surface extending and meandering with respect to the longitudinal direction to provide changes in curvature that are able to refract light in two dimensions, wherein directions of said ridge and said meandering surface relative to said longitudinal direction vary along a length of each of the prism units; and
a light-diffusing microstructure layer formed on the second surface of the substrate, said light-diffusing microstructure layer including microstructure protrusions varying in heights with respect to the second surface of the substrate.
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Accused Products
Abstract
A brightness enhancement film includes a substrate, a plurality of curved prism units and a light-diffusing microstructure layer. The curved prism units are extended in parallel and formed on a first surface of the substrate. Each of the curved prism units includes at least one meandering surface to provide with changes in curvature. Thus, the meandering surface of the curved prism unit is able to refract incident light in two dimensions with respect to the substrate that may enhance entire light-collecting efficiency in two dimensions. The light-diffusing microstructure layer is formed on a second surface of the substrate.
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Citations
24 Claims
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1. A brightness enhancement film, said brightness enhancement film being arranged to be used in a liquid crystal display, comprising:
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a substrate including a first surface and a second surface substantially parallel to said first surface, and vertically transmitting light between the first surface and the second surface;
a plurality of curved prism units juxtaposed on the first surface of the substrate, each of the curved prism units having a longitudinal direction and including a ridge, a trough line, and at least one meandering surface located between said ridge and trough line, said ridge and said meandering surface extending and meandering with respect to the longitudinal direction to provide changes in curvature that are able to refract light in two dimensions, wherein directions of said ridge and said meandering surface relative to said longitudinal direction vary along a length of each of the prism units; and
a light-diffusing microstructure layer formed on the second surface of the substrate, said light-diffusing microstructure layer including microstructure protrusions varying in heights with respect to the second surface of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification