Suspended particle device light valve film
US6936193B2 · kind B2 · utility
38Cited by
9References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2003 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | May 28, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/05
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film suitable for use as a light-modulating unit of a suspended particle device light valve, comprising a plurality of particles dispersed in a liquid suspending medium, distributed within an optionally crosslinked matrix polymer. The suspending medium is substantially immiscible with the matrix polymer, has a boiling point greater than about 100° C., has an electrical resistivity of at least about 0.8×106 ohms per square, and has an in endex of refraction at 25° C. which differs from that of the matrix polymer by no more than about 0.002.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.