Electrochromic optical shutter

Details Electrochromic optical shutter Electrochromic optical shutter

1986-12-18

1989-02-21

LaRoche, Eugene R.

G02F 101

Patent

active

048059960

ABSTRACT:
This specification is directed to electrochromic optical shutter (10) in which an electrochromic material (12), an ion conductor (14), and a counter electrode (16), in that order, are sandwiched between visibly transparent electrodes (18). The shutter is improved by forming the ion conductor from a lithium-doped aluminum oxide applied to, as a base therefor, either the electrochromic material or the counter electrode. The material is applied by a pyrolytic spray process in which a solution containing lithium and aluminum as pyrolyzable organic salts dissolved in an organic medium are sprayed on the base. The base has been previously heated to a temperature sufficient to pyrolyze the sprayed materials and form a lithium-doped, aluminum oxide ion conductor layer. The counter electrode may be removed, in which case the ion conductor would be applied to either the electrochromic material or one of the visibly transparent electrodes.

REFERENCES:
patent: 4256379 (1981-03-01), Green
patent: 4278329 (1981-07-01), Matsuhire
patent: 4297005 (1981-10-01), Johnson, Jr. et al.
patent: 4416517 (1983-11-01), Beall et al.
patent: 4482216 (1984-11-01), Hashimoto

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