Electrochromic nonglaring mirror
First Claim
1. An electrochromic nonglaring mirror, comprising:
- a transparent front substrate which is coated with a transparent first electrode film, and a back substrate which is coated with a second electrode film, said back substrate positioned parallel to said front substrate such that the first and second electrode films are opposite to and spaced from each other;
a first electrochromic layer formed on said first electrode film and a second electrochromic layer formed on said second electrode film;
means for providing a reflecting surface to said back substrate; and
an electrolyte liquid provided in the space between said front and back substrates;
one of said first and second electrochromic layers being formed from a conjugated polymer which undergoes electrochemical oxidation and reduction and becomes lower in light transmittance when it is in an oxidized state, said conjugated polymer being a polymer prepared from a compound represented by the following general formula;
##STR2## wherein X, Y and Z each represent a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkoxyl group, an acyl group, an allyl group, a vinyl group or a vinylidene group, the other electrochromic layer being formed of a transition metal oxide which becomes lower in light transmittance when it is in an electrochemically reduced state.
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Abstract
Disclosed is a nonglaring mirror which is an electrochromic device in principle. The mirror comprises a transparent front substrate laid with a transparent first electrode film, a back substrate laid with a second electrode film which is opposite and spaced from the first electrode film, first and second electrochromic layers formed on the first and second electrode films, respectively, and an electrolyte liquid which fills up the space between the two substrates. A reflecting surface is provided by using a transparent sheet as the back substrate and coating the rear surface of the back substrate with a reflecting metal film, or by using a reflecting metal film as the second electrode film. One of the first and second electrochromic layers is formed of a polymer of a conjugated compound, such as substituted or unsubstituted triphenylamine, and the other is formed of a transition metal oxide such as WO3. In the initial state both the first and second electrochromic layers are colorless and transparent. For coloration, the conjugated polymer layer is oxidized and the transition metal oxide layer is reduced. In the colored state the reflectance of the mirror becomes 7-15% and is controllable.
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Citations
14 Claims
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1. An electrochromic nonglaring mirror, comprising:
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a transparent front substrate which is coated with a transparent first electrode film, and a back substrate which is coated with a second electrode film, said back substrate positioned parallel to said front substrate such that the first and second electrode films are opposite to and spaced from each other; a first electrochromic layer formed on said first electrode film and a second electrochromic layer formed on said second electrode film; means for providing a reflecting surface to said back substrate; and an electrolyte liquid provided in the space between said front and back substrates; one of said first and second electrochromic layers being formed from a conjugated polymer which undergoes electrochemical oxidation and reduction and becomes lower in light transmittance when it is in an oxidized state, said conjugated polymer being a polymer prepared from a compound represented by the following general formula;
##STR2## wherein X, Y and Z each represent a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkoxyl group, an acyl group, an allyl group, a vinyl group or a vinylidene group, the other electrochromic layer being formed of a transition metal oxide which becomes lower in light transmittance when it is in an electrochemically reduced state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification