Electrochromic cells with improved electrolyte system

Details Electrochromic cells with improved electrolyte system Electrochromic cells with improved electrolyte system

1979-08-30

1982-06-22

Davie, James W.

G02F 117

Patent

active

043359388

ABSTRACT:
Electrochromic devices are described having a layer of electrochromic material, e.g. WO.sub.3, in contact with a layer of organic electrolyte resin, with electrode means for changing electrochromic properties of the device by electric field means. The electrolyte resin layer comprises a hydrophilic layer of homopolymer of poly(2-acrylamido-2-methylpropane sulfonic acid) and in some preferred embodiments may further comprise a thinner layer of less hydrophilic electrolyte resin between the homopolymer and electrochromic layers.

REFERENCES:
patent: 3971624 (1976-07-01), Bruesch
patent: 4116545 (1978-09-01), Reddy
patent: 4116546 (1978-09-01), Leibowitz
patent: 4120568 (1978-10-01), Deb et al.
patent: 4174152 (1979-11-01), Giglia et al.
patent: 4175838 (1979-11-01), Randin

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