| 摘要 |
A brightness enhancement article ( 30 ) provides light from a two-dimensional surface. The brightness enhancement article ( 30 ) has a plurality of light collecting structures ( 32 ), wherein each light collecting structure ( 32 ) is longitudinally extended in a length direction along the surface. Each light collecting structure ( 32 ) has an input aperture ( 33 ) optically coupled to a light-providing surface and an output aperture ( 35 ) distal from the input aperture ( 33 ), wherein the output aperture ( 35 ) has a surface area that is larger than the surface area of the input aperture ( 33 ). A pair of curved side walls ( 38 ) extend from the output aperture ( 35 ) toward the input aperture ( 33 ). In a cross section taken orthogonally with respect to the length direction, the curved side walls ( 38 ) approximate a parabolic curvature.
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