Retroreflective structural colour film for smart displays and the preparation method thereof
US10838119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Jun 6, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure relates to an retroreflective structural colour film and a preparation method thereof. The main steps are as follows: (1) assembling colloidal microspheres to form a monolayer of microspheres; and (2) transferring the monolayer of microspheres onto a transparent substrate which has an adhesive layer to make the monolayer of microspheres partially embedded in the adhesive layer to prepare the retroreflective structural colour film. The retroreflective material has the advantages of the simple preparation process, high reflective brightness and uniformity of reflection colour. Moreover, the retroreflective material can exhibit unique retroreflective structural colour under the illumination of a white light source. These characteristics make the retroreflective material especially suitable for nighttime traffic safety applications, for example, to provide a constant colour signal to drivers, and simultaneously to provide dynamically changing colour signal to pedestrians to warn them of approaching vehicles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.