Light enhancing structures with a plurality of arrays of elongate features
First Claim
Patent Images
1. An optical member comprising an array of total internal reflection structures, said optical member comprising:
- an optically transmissive film having a surface;
a first plurality of non-intersecting elongate features formed in said surface; and
a second plurality of non-intersecting elongate features formed in said surface, said first plurality of non-intersecting elongate features being oriented at an angle with respect to said second plurality of non-intersecting elongate features that is less than 30°
,wherein each of said non-intersecting elongate features in said first plurality extends across said multiple non-intersecting elongate features in said second plurality thereby defining said total internal reflection structures, and at least one of said total internal reflection structures comprises a prism having planar facets each having substantially the same projected area.
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Abstract
Various embodiments comprise light recycling films comprising an array of parallel ridges and grooves that form prisms that selectively reflect or transmit light. In some embodiments, the light recycling film may be used in displays that include spatial light modulators comprising a plurality of pixels. The light recycling film can limit the field-of-view of the display and enhance the luminance within that field-of-view. Various embodiments comprising multiple arrays of ridges and/or grooves can enhance uniformity of illumination of the pixels in the spatial light modulator and reduce Moiré effects.
247 Citations
23 Claims
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1. An optical member comprising an array of total internal reflection structures, said optical member comprising:
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an optically transmissive film having a surface; a first plurality of non-intersecting elongate features formed in said surface; and a second plurality of non-intersecting elongate features formed in said surface, said first plurality of non-intersecting elongate features being oriented at an angle with respect to said second plurality of non-intersecting elongate features that is less than 30°
,wherein each of said non-intersecting elongate features in said first plurality extends across said multiple non-intersecting elongate features in said second plurality thereby defining said total internal reflection structures, and at least one of said total internal reflection structures comprises a prism having planar facets each having substantially the same projected area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An optical member comprising an array of total internal reflection structures, said optical member comprising:
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an optically transmissive film having a surface; a first plurality of non-intersecting elongate features formed in said surface; and a second plurality of non-intersecting elongate features formed in said surface, said first plurality of non-intersecting elongate features being oriented at an angle with respect to said second plurality of non-intersecting elongate features that is less than 10°
,wherein each of said non-intersecting elongate features in said first plurality extends across said multiple non-intersecting elongate features in said second plurality thereby defining said total internal reflection structures.
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Specification