| 摘要 |
PROBLEM TO BE SOLVED: To prevent remaining of colors in a color-erasing mode and to prevent abnormality in the appearance during operation at high temp. by sealing an electrolyte liquid which is prepared by dissolving a specified cathode compd. and an anode compd. in a nonaqueous solvent in the space between two substrates facing each other. SOLUTION: The rear face of a first glass substrate with a transparent electrode film formed is disposed facing the front face of a second glass substrate with a transparent electrode film formed with a specified space, and an electrolyte liquid is sealed in the space. The electrolyte liquid is prepared by dissolving a cathode compd. and an anode compd. in a nonaqueous solvent. The cathode compd. is prepared by mixing compds. having structures expressed by formula I and formula II, while the anode compd. consists of a deriv. of a metallocene structure expressed by (M(C5H5)2) with substitution of butyl groups. In formula I, R1 and R2 may be same or different and each is a 1-10C alkyl group or phenyl group, and X1- is BF4-. In formula II, R1 and R2 may be same or different and each is a 1-10C alkyl group or phenyl group or benzyl group, and X2- is ClO4-.
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