Variable transmittance optical filter with substantially co-planar electrode system
First 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.
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Accused Products
Abstract
A variable transmittance optical filter comprising: a first layer comprising a first substantially transparent substrate with a substantially co-planar (SC) electrode system disposed thereon, the SC electrode system 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, a second layer proximate to the first layer and comprising a transition material that darkens in response to a non-electrical stimulus and lightens in response to application of an electric voltage; and an electrical connection system for electrically connecting the SC electrode system to a source of electric voltage.
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Citations
33 Claims
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1. A variable transmittance optical filter comprising:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of preparing a variable transmittance optical filter comprising the steps of:
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(a) providing a first layer comprising a first substantially transparent substrate, and; (i) etching into a layer of substantially transparent electrically conductive material disposed thereon a substantially co-planar (SC) electrode system pattern, the SC electrode system pattern comprising at least one pair of electrically separate electrodes arranged in a substantially co-planar manner, each pair of electrically separate electrodes comprising a first electrode and a second electrode;
or(ii) printing onto the first substrate a substantially co-planar (SC) electrode system pattern using a conductive ink, the SC electrode system pattern comprising at least one pair of electrically separate electrodes arranged in a substantially co-planar manner, each pair of electrically separate electrodes comprising a first electrode and a second electrode; (b) disposing a second layer proximate to the SC electrode system pattern, the second layer comprising a transition material comprising a compound that is both photochromic and electrochromic that is capable of dynamically varying the degree of visible light transmittance on application of an electric voltage; and (c) providing an electrical connection system 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 primary finger-like structures of the second electrode. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification