Single layer image projection film
US9873281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2015 |
| Grant date | Jan 23, 2018 |
| Priority date | — |
| Expiry date | Dec 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B30/27
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A single layer image projection system that is made up of an arrangement of optionally reflective arcuate elements having an upper arcuate surface, a lower surface, and an arcuate area bounded by the upper arcuate and lower surfaces, and an optionally reflective pattern of image relief microstructures disposed on or within at least some of the upper arcuate surfaces of the arcuate elements, is provided. The arrangement of optionally reflective arcuate elements and the optionally reflective pattern of image relief microstructures are in a single layer and interact to project one or more images. For an upper arcuate surface with convex surface curvature, the image relief microstructures extend downwardly from this surface terminating within the arcuate area, and for an upper arcuate surface with concave surface curvature, the image relief microstructures extend upwardly from this surface terminating within an area defined by the curvature of the upper arcuate surface. Transmission of light through the system, reflection of light from the system or a combination thereof forms one or more images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.