Electrochromic display devices

Details Electrochromic display devices Electrochromic display devices

1985-08-14

1988-06-21

Punter, William H.

G02F 123

Patent

active

047521198

ABSTRACT:
An electrochromic display devices using a specific type of diphenylamine as an electrochromic material is described. The diphenylamine compound, which is dissolved in an inert solvent along with an electrolyte, can undergo electrochemically reversible color formation and erasure reactions and form two different colors at one of electrodes on application of two different potentials across the electrodes. Multicolor devices are also described in which the diphenylamine compound capable of forming colors by oxidation is used in combination with an anthraquinone compound which is capable of forming a color, different from the colors of the oxidized species of the diphenylamine coumpound, at the same electrode by reduction.

REFERENCES:
patent: 4212518 (1980-07-01), Imataki
patent: 4285575 (1981-08-01), Imataki
patent: 4402573 (1983-09-01), Jones
patent: 4482216 (1984-11-01), Hashimoto et al.
Ueno et al., "Three Color Switching Electrochromic Display using Organic Redox-Pair Dyes", Japanese Jr. of App. Physics, 3-1985, pp. L178-L180.

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