Switchable window based on electrochromic polymers
US7547658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2007 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Oct 31, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/15145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Syntheses of a new blue EC monomer (ProDOT-MePro), and a new red EC monomer (ProDOP-Et2) are described. Two additional new types of EC monomers based on 3,4-alkylenedioxythiophene include fluorinated EC monomers and an EC monomer including silicon. EC polymer devices having more than one different color EC polymer to enable additional colors to be provided using subtractive color mixing are also described, as well as EC polymer devices incorporating a logo, image, or text, are generally obscured when the device is colored, but become visible when the device is not colored. Also described are EC polymer devices that include a cathodic EC polymer layer, a gel electrolyte, a counter electrode, and a reference electrode. Working prototypes of such devices exhibit significant increases in the speed of transition of the EC device from a colored state to a transparent state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.