Piezoelectric coating
US6878416B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2003 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Mar 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color shifting composition and method useful as a coating on a surface. The composition comprises a layer of piezoelectric material disposed on the surface and a layer of electrically conductive disposed on the layer of piezoelectric material. A mechanism is included for changing an electromagnetic property of the layer of piezoelectric material. Thus, the surface has a first reflective or refractive property at one setting of the mechanism and another reflective or refractive property at another setting of the mechanism. In the illustrative embodiment, the layer of piezoelectric material and the layer of electrically conductive material are sufficiently thin to be transparent to electromagnetic energy in the frequencies of interest. In the illustrative embodiment, the mechanism for changing an electromagnetic property of the layer of piezoelectric material is a source of the electrical potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.