Light emitting panel assemblies
View Patent ↗Light emitting panel assemblies include a light emitting panel member having at least one light source optically coupled to a portion of an input edge of the panel member. A plurality of individual light extracting deformities on or in at least one panel surface of the panel member are of well defined shape and have a length and width substantially smaller than the length and width of the panel surface. At least some of the deformities have at least one surface that is angled at different orientations relative to the input edge depending on the location of the deformities on the panel surface to face a portion of the input edge to which a light source is optically coupled.
1. A light emitting panel assembly comprising a light emitting panel member having at least one input edge, a plurality of light sources optically coupled to different portions of the width of the input edge, and a pattern of individual light extracting deformities associated with respective light sources, wherein the deformities are projections or depressions on or in at least one surface of the panel member for producing a desired light output from the panel member, wherein each of the deformities has a length and width substantially smaller than the length and width of the panel surface, wherein the deformities that are in close proximity to the input edge increase in density, size, depth and/or height as the distance of the deformities from the respective light sources increases across the width of the panel member, and wherein the density, size, depth and/or height of the deformities in close proximity to the input edge is greatest at approximate midpoints between adjacent pairs of the light sources.
2. The assembly of claim 1 wherein the light sources are light emitting diodes.
3. The assembly of claim 1 wherein different ones of at least some of the deformities have at least one light extracting surface that is oriented to face the respective light sources depending on the location of the deformities across the width of the panel member.
4. The assembly of claim 1 wherein at least some of the deformities have two or more intersecting surfaces that intersect the panel surface and intersect each other.
5. The assembly of claim 4 wherein the surfaces of at least some of the deformities are multi-segment, curved or flat.
6. A light emitting panel assembly comprising a light emitting panel member having at least one input edge, a plurality of light sources optically coupled to different portions of the width of the input edge, and a pattern of individual light extracting deformities associated with respective light sources, wherein the deformities are projections or depressions on or in at least one surface of the panel member for producing a desired light output from the panel member, wherein each of the deformities has a length and width substantially smaller than the length and width of the panel surface, wherein the deformities that are in close proximity to the input edge increase in density, size, depth and/or height as the distance of the deformities from the respective light sources increases across the width of the panel member, wherein at least some of the deformities have two or more intersecting surfaces that intersect the panel surface and intersect each other, and wherein at least some of the deformities only have two surfaces.
7. The assembly of claim 6 wherein the light sources are light emitting diodes.
8. The assembly of claim 6 wherein different ones of at least some of the deformities have at least one light extracting surface that is oriented to face different light sources depending on the location of the deformities across the width of the panel member.
9. The assembly of claim 6 wherein at least some of the deformities at different locations across the width of the panel surface have at least one light extracting surface that is oriented in a width or length direction of the light extracting surface at different orientations relative to the input edge and relative to each other depending on the location of the deformities on the panel surface to face the portion of the width of the input edge to which the different light sources are optically coupled.
10. The assembly of claim 9 wherein substantially all of the deformities across the width of the panel member have at least the one light extracting surface that is oriented in the width or length direction of the light extracting surface to face the portion of the width of the input edge to which the different light sources are optically coupled.
11. The assembly of claim 9 wherein at least one of the intersecting surfaces of at least some of the deformities comprises the light extracting surface of the deformities that is oriented in the width or length direction of the light extracting surface to face the portion of the width of the input edge to which the different light sources are optically coupled.
12. The assembly of claim 9 wherein the two surfaces of at least some of the deformities come together to form ridges, and at least one of the surfaces of at least some of the deformities at different locations across the width of the panel surface is oriented at different orientations in a width or length direction of the at least one surface relative to the input edge and relative to each other to face the portion of the width of the input edge to which the different light sources are optically coupled.
13. The assembly of claim 12 wherein at least some of the deformities vary in at least one of the following characteristics for controlling an output ray angle distribution or uniformity of the light emitted by the panel member to serve a particular application: density, size, depth and/or height.
14. The assembly of claim 12 wherein at least some of the deformities are random in at least one of the following characteristics for controlling an output ray angle distribution or uniformity of the light emitted by the panel member to suit a particular application: density, size, depth and/or height.