Patent ID: 9568799
Date: 2017-02-14
CPC Classifications: C07D,C08G,E06B,G02B,G02C,G02F,G09G

Claim:
1. A variable transmittance optical filter comprising: (a) a first layer comprising a first substantially transparent substrate with a substantially co-planar (SC) electrode system pattern disposed thereon, the SC electrode system pattern made of transparent electrically conductive material and comprising at least one pair of electrically separate electrodes arranged in a substantially co-planar manner on the first substantially transparent substrate, each pair of electrically separate electrodes comprising a first electrode and a second electrode; (b) a second layer proximate to the first layer and comprising a transition material comprising a compound that is both photochromic and electrochromic, and that darkens in response to a non-electrical stimulus and lightens in response to application of an electric voltage; and (c) an electrical connection system for electrically connecting the SC electrode system pattern to a source of the electric voltage; wherein the first electrode and the second electrode of each pair comprise primary finger-like structures and the primary finger-like structures of the first electrode are interdigitated with the finger-like structures of the second electrode.