Display device having reduced electrochromic film dissolution

Details Display device having reduced electrochromic film dissolution Display device having reduced electrochromic film dissolution

1979-01-15

1981-07-07

Davie, James W.

G02F 117

Patent

active

042771471

ABSTRACT:
In the preferred embodiment, an improved electrochromic display device is disclosed wherein an acid-resistant, proton-conductive, nonporous polymer layer separates the electrochromic transition metal oxide film and the aqueous acidic electrolyte. The polymer layer preferably comprises an ultraviolet light-cured, plasticized poly (vinyl alcohol) that is thermally treated to render it acid insoluble. The polymer layer conducts protons between the electrolyte and the electrochromic layer to permit the desired electrochromic reactions to occur, but reduces film dissolution into the electrolyte to substantially extend the useful lifetime of the device.

REFERENCES:
patent: 3578843 (1971-05-01), Castellion
patent: 3840288 (1974-10-01), Schnatterly
patent: 3944333 (1976-03-01), Leibowitz
patent: 3957352 (1976-05-01), Leibowitz
patent: 3981560 (1976-09-01), Heyman et al.
patent: 4021100 (1977-05-01), Giglia
patent: 4120568 (1978-10-01), Deb et al.

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