Method of fabricating arrays of individually oriented micro mirrors for use in imaging security devices
US10901191B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2018 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Jun 6, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0012
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A visual display assembly useful as an authentication or anti-counterfeiting element. The assembly includes a substrate and, on a surface of the substrate, an array of micro mirrors receiving ambient light. Each mirror includes a reflective surface to reflect the ambient light to display an image that appears to float in a plane, which is spaced a distance apart from the surface of the substrate. The image includes a plurality of pixels, and the array of micro mirrors includes for each of the pixels a set of the micro mirrors each having a reflective surface oriented to reflect the ambient light toward a point on the plane corresponding to one of the pixels. Each of the sets of the micro mirrors includes a plurality of the micro mirrors, and the reflected ambient light each set of micro mirrors intersects to illuminate or write a pixel of an image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.