Light enhancing structures with a plurality of arrays of elongate features
AssigneeAvery Dennison Corporation
InventorsDennis I. Couzin, William J. Cassarly, Steven R. Chapman
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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.
Claims18
1-23. (canceled)
An optical member comprising an array of total internal reflection structures, the optical member comprising:
- an optically transmissive film having a surface;
- a first plurality of non-intersecting elongate features formed in the surface;
- and
- a second plurality of non-intersecting elongate features formed in the surface, the first plurality of non-intersecting elongate features being oriented at an angle with respect to the second plurality of non-intersecting elongate features that is less than 30°,
- wherein each of the non-intersecting elongate features in the first plurality extends across the multiple non-intersecting elongate features in the second plurality thereby defining the total internal reflection structures, and at least one of the total internal reflection structures comprises a prism having facets having rounded edges.
Dependencies are inferred from the claim text.