High efficiency electrochromic display device
First Claim
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1. In a reversible electrochromic display device comprising a reactive medium between two electrically conductive electrodes, at least one of which is transparent, said medium comprising an anhydrous solvent and an oxidant/reductant pair wherein the reductant is an electron acceptor, the improvement according to which the oxidant is a triaryl pyrazoline compound having the formula:
- ##STR2## wherein A, A1 and A2 are each phenyl or phenyl substituted with an electron releasing group, and n is zero or one.
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Abstract
This invention relates to a reversible display device based upon the electrochromic properties of triaryl pyrazoline compounds when used in conjunction with a complementary redox material.
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Citations
8 Claims
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1. In a reversible electrochromic display device comprising a reactive medium between two electrically conductive electrodes, at least one of which is transparent, said medium comprising an anhydrous solvent and an oxidant/reductant pair wherein the reductant is an electron acceptor, the improvement according to which the oxidant is a triaryl pyrazoline compound having the formula:
- ##STR2## wherein A, A1 and A2 are each phenyl or phenyl substituted with an electron releasing group, and n is zero or one.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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