Electrooptical device
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United States of America Patent
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Sep 12, 1989
Grant Date -
N/A
app pub date -
Aug 21, 1987
filing date -
Aug 21, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrochromic device useful as a smart window comprises a pair of transparent doped tin oxide layers that serve as the terminal electrodes, and between which are sandwiched an electrochemical cell including a layer of electrochromic material and between the layer of electrochromic material and its proximate termial is inserted a layer of tin oxide whose normal resistance is large compared to the lateral resistance of the proximate doped tin oxide layer. This serves to improve the lateral uniformity of the potential applied to the electrochemical cell when a voltage is applied across the terminal electrodes with a resultant improvement in the uniformity of coloring and bleaching across the surface of the electrochromic layer.
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