Arrays of individually oriented micro mirrors providing infinite axis activation imaging for imaging security devices
US10317691B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2017 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Sep 29, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B25/00
- 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 so as 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.