Electrochromic compounds and associated media and devices

US7428091B2 · kind B2 · utility

Assignee

• GENTEX CORPORATION · US

Inventors

• Kelvin L. Baumann · Holland, US
• Thomas F. Guarr · Holland, US
• Punam Giri · Holland, US
• Mark D. Muyskens · Holland, US
• Sue F. Franz · Holland, US

Key dates

• Filing date: Nov 10, 2005
• Grant date: Sep 23, 2008
• Expiry date: Jan 18, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2001/15145
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electrochromic device having an electrochromic medium comprising: a material represented by the following formula:wherein X comprises N—R10, O, or S; wherein R1-R10 are defined herein with the proviso that at least one of R5 and R10 comprises an alkyl, cycloalkyl, polycycloalkyl, heterocycloalkyl, aryl, alkaryl, aralkyl, alkoxy, alkenyl, and/or alkynyl group containing 4 to approximately 50 carbon atoms, wherein at least one of the carbon atoms may be a linking group to, or part of, a halogen, a N, O, and/or S containing moiety, and/or one or more functional groups comprising alcohols, esters, ammonium salts, phosphonium salts, and combinations thereof, and wherein at least one of R5 and R10 is void of any β hydrogen atoms.