Micro-coextruded film modified with piezoelectric layers
US7602108B2 · kind B2 · utility
11Cited by
21References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2006 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Oct 12, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed are layered films having a combination of piezoelectric layers that change dimension with applied voltage and non-piezoelectric layers. The layered structures can form a wide range of electrically switchable optical films. These films have applications in displays, polarizers, optical compensators, aesthetic films, and “hot” and “cold” mirrors that selectively reflect only certain wavelengths. Also disclosed are monochromatic and multicolor displays using these films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.