Optical element, lighting device, and liquid crystal display device
First Claim
1. An optical element having a light-emitting surface that emits light while diffusing it, said light-emitting surface having a plurality of parallel elongated lens surfaces arranged side-by-side in a row thereon, said elongated lens surfaces each having an arcuate cross-section, wherein a height of said arcuate cross-section of said elongated lens surfaces varies continuously and repeatedly in a longitudinal direction of said elongated lens surfaces.
1 Assignment
0 Petitions
Accused Products
Abstract
A light-diffusing member made of an optically transparent material has a light-emitting surface that emits light while diffusing it. The light-emitting surface has a plurality of parallel elongated lens surfaces arranged side-by-side in a row thereon. The elongated lens surfaces each have a convexly arcuate cross-section. The height of the convexly arcuate cross-section of the elongated lens surfaces varies continuously and repeatedly in the longitudinal direction of the elongated lens surfaces.
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Citations
11 Claims
- 1. An optical element having a light-emitting surface that emits light while diffusing it, said light-emitting surface having a plurality of parallel elongated lens surfaces arranged side-by-side in a row thereon, said elongated lens surfaces each having an arcuate cross-section, wherein a height of said arcuate cross-section of said elongated lens surfaces varies continuously and repeatedly in a longitudinal direction of said elongated lens surfaces.
Specification