SPD light valves incorporating films comprising improved matrix polymers and methods for making such matrix polymers
US7791788B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2006 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Jan 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/172
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A film suitable for use as the light-modulating element of an SPD light valve. The film comprises a cross-linked polymer matrix and has droplets of a liquid light valve suspension distributed in the cross-linked polymer matrix. The liquid light valve suspension comprises particles suspended in a liquid suspending medium, wherein the polymer matrix includes at least one siloxane co-polymer comprised of one or more of each of the following units, The film exhibits a greater degree of adhesion to substrates it contacts than films which do not include a unit as recited in (c) above. Additional embodiments include a suspended particle device incorporating the film as a light modulating element, as well as a method of preparing the film according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.