Light guide illumination devices
First Claim
1. An illumination device comprising:
- at least one light source;
a light redirecting slab made of optically transmissive material and comprising an optical output surface and an array of optical redirecting elements, each of the optical redirecting elements having an optical coupling surface situated distally from the optical output surface and at least one light redirecting surface for receiving light from the optical coupling surface and redirecting the light received therefrom toward the optical output surface for emission therefrom;
a substantially planar light guide slab made of an optically transmissive material and having a first surface, a second surface opposite the first surface and at least one input surface, the at least one input surface for receiving light from the at least one light source;
wherein the first surface comprises a planar light guide layer and a plurality of light steepening elements extending from the planar light guide layer, each of the light steepening elements comprising at least one reflective surface for moderating the steepness of angles of the light being transmitted through the light guide slab to provide output light of generally uniform intensity across the light output surface; and
an array of optical apertures optically interconnecting the light guide slab and the light redirecting slab,wherein the first surface, the second surface and the array of optical apertures are arranged one with respect to the other such that light entering the light guide slab is guided through the light guide slab via one or more reflections for insertion into the light redirecting slab.
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Accused Products
Abstract
A light-guide illumination device and system comprises a light source, a light redirecting slab and a light guide slab assembly. The light redirecting slab includes a generally planar face having optical redirecting elements, the optical redirecting elements having respective optical coupling surfaces situated distally from the planar face. The light guide slab assembly includes a planar face having an optically transmissive interface layer assembled onto a first planar face of the light guide slab and optically coupled to receive transmitted light directed from the light source. The light guide slab is pressed onto the redirecting slab such that the interface layer is deformed, creating optical bonds at the optical coupling surfaces of the optical redirecting elements, the formed optical bonds providing optical apertures for light transmission therethrough.
196 Citations
18 Claims
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1. An illumination device comprising:
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at least one light source; a light redirecting slab made of optically transmissive material and comprising an optical output surface and an array of optical redirecting elements, each of the optical redirecting elements having an optical coupling surface situated distally from the optical output surface and at least one light redirecting surface for receiving light from the optical coupling surface and redirecting the light received therefrom toward the optical output surface for emission therefrom; a substantially planar light guide slab made of an optically transmissive material and having a first surface, a second surface opposite the first surface and at least one input surface, the at least one input surface for receiving light from the at least one light source; wherein the first surface comprises a planar light guide layer and a plurality of light steepening elements extending from the planar light guide layer, each of the light steepening elements comprising at least one reflective surface for moderating the steepness of angles of the light being transmitted through the light guide slab to provide output light of generally uniform intensity across the light output surface; and an array of optical apertures optically interconnecting the light guide slab and the light redirecting slab, wherein the first surface, the second surface and the array of optical apertures are arranged one with respect to the other such that light entering the light guide slab is guided through the light guide slab via one or more reflections for insertion into the light redirecting slab. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification