Color reversible electrochemical light filter utilizing electrolytic solution
First Claim
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1. IN AN ELECTROCHEMICAL LIGHT FILTER HAVING A TRANSPARENT GROSS ELECTRODE, A MINOR ELECTRODE IN SPACED RELATION TO THE GROSS ELECTRODE AND WHICH IS SPACED AND POSITIONED TO ALLOW THE PASSAGE OF LIGHT, A LIGHT TRANSMITTING ELECTROLYTE OCCUPYING THE SPACE BETWEEN SAID ELECTRODES, AN ELECTRICAL POWER SOURCE AND MEANS FOR REVERSIBLY APPLYING SUCH ELECTRICAL POWER TO THE ELECTRODES, THE IMPROVEMENT WHICH COMPRISES PROVIDING AS SAID ELECTROLYTE AN AQUEOUS SOLUTION HAVING A MAXIMUM PH OF 3 AND CONTAINING THEREIN A COLORING AMOUNT OF COMPLEXED IRON ION STABLE IN AQUEOUS SOLUTION IN THE +2 AND +3 VALANCE STATES WHEREBY THE COLOR OF THE AQUEOUS SOLUTION IS ALTERED BY SEQUENTIALLY APPLYING PULSES OF ELECTRICAL POWER OF OPPOSITE POLARITY.
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1 Claim
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1. IN AN ELECTROCHEMICAL LIGHT FILTER HAVING A TRANSPARENT GROSS ELECTRODE, A MINOR ELECTRODE IN SPACED RELATION TO THE GROSS ELECTRODE AND WHICH IS SPACED AND POSITIONED TO ALLOW THE PASSAGE OF LIGHT, A LIGHT TRANSMITTING ELECTROLYTE OCCUPYING THE SPACE BETWEEN SAID ELECTRODES, AN ELECTRICAL POWER SOURCE AND MEANS FOR REVERSIBLY APPLYING SUCH ELECTRICAL POWER TO THE ELECTRODES, THE IMPROVEMENT WHICH COMPRISES PROVIDING AS SAID ELECTROLYTE AN AQUEOUS SOLUTION HAVING A MAXIMUM PH OF 3 AND CONTAINING THEREIN A COLORING AMOUNT OF COMPLEXED IRON ION STABLE IN AQUEOUS SOLUTION IN THE +2 AND +3 VALANCE STATES WHEREBY THE COLOR OF THE AQUEOUS SOLUTION IS ALTERED BY SEQUENTIALLY APPLYING PULSES OF ELECTRICAL POWER OF OPPOSITE POLARITY.
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Current AssigneeGiffin D. Jones, Ralph E. Friedrich
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Original AssigneeGiffin D. Jones, Ralph E. Friedrich
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InventorsJones, Giffin D., Friedrich, Ralph E.
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Application NumberUS04/249,862Time in Patent Office1,394 DaysField of SearchUS Class Current359/275CPC Class CodesG02B 5/24 Liquid filters G02B5/23 tak...G02F 1/15 based on an electrochromic ...G02F 2001/1517 Cyano complex compounds, e....
