Electrochromic display device
First Claim
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1. An electrochromic display device comprising:
- a first redox system containing a first electrolyte,a counter electrode in contact with said first electrolyte, said counter electrode containing a material that undergoes a reversible redox reaction in said first electrolyte at a known potential,a plurality of display electrodes in contact with said first electrolyte,a second redox system separated from said first redox system by an ion exchange membrane, anda third electrode in said second redox system and being electrically connected to said counter electrode wherein the charge of said counter electrode is maintained at said known potential.
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Abstract
An electrochromic display device has an improved counter electrode arrangement. The device has a plurality of display elctrodes and a counter electrode in contact with a first electrolyte of a primary redox system. The counter electrode is charged to a predetermined potential. A secondary redox system is associated with the primary redox system. A secondary electrode in the secondary redox system is electrically connected to the counter electrode to maintain the charge on the counter electrode at a predetermined potential.
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4 Claims
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1. An electrochromic display device comprising:
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a first redox system containing a first electrolyte, a counter electrode in contact with said first electrolyte, said counter electrode containing a material that undergoes a reversible redox reaction in said first electrolyte at a known potential, a plurality of display electrodes in contact with said first electrolyte, a second redox system separated from said first redox system by an ion exchange membrane, and a third electrode in said second redox system and being electrically connected to said counter electrode wherein the charge of said counter electrode is maintained at said known potential. - View Dependent Claims (2, 3, 4)
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Specification