SPD films and light valves incorporating overcoatings which enhance film adhesion to substrates, have good cohesion and protect against electrical short circuits
US7920321B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2008 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Dec 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optical device, e.g., a suspended particle device (SPD) adapted for controlling the transmission of radiation wherein the device is provided with at least one layer of an overcoating adapted to enhance adhesion on at least a portion of a surface between a film serving as a light modulating element and electrode means for applying an electrical field to said film, wherein the overcoating is formed from a material comprising a member selected from the group consisting of (a) titanium dioxide (TiO2) alone and (b) a combination of SiOx and an inorganic material having an index of refraction at 589 nm greater than 1.54. A method of producing the device with the application of such overcoating is additionally described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.