Patent
1983-12-29
1986-02-18
Morgenstern, Norman
G02F 101
Patent
active
045710295
ABSTRACT:
An electro-optical display device having a housing with wall means including one transparent wall and at least one other wall. Counter electrodes are positioned on the transparent wall and display electrodes are positioned on the other wall with both electrodes in electrically conductive relationship with an electrolyte. Circuit means are connected to the display and counter electrodes to apply different predetermined control potentials between them. The display electrodes are covered with a thin electrically conductive polymer film that is characterized according to the invention by having embedded in it pigment molecules as counter ions. The display device is operable to be switched to a plurality of different visual color states at an exceptionally rapid switching rate while each of the color states is characterized by possessing good color intensity and definition.
REFERENCES:
patent: 3712709 (1973-01-01), Kenworthy
patent: 4184751 (1980-01-01), Nicholson
patent: 4304465 (1981-12-01), Diaz
patent: 4306774 (1981-12-01), Nicholson
Okabayashi et al, "Electrochemical Doping with Meso-Tetrakis(4-sulphonatophenyl)-Porphyrincobalt of a Pyrolle Film Electrode", J. Chem. Soc., Chem. Commun., 1983.
Bull et al, "Polymer Films on Electrodes", Manuscript Submitted to Electrochemical Society, Feb. 22, 1983.
Linkous Clovis A.
O'Grady William E.
Skotheim Terje A.
Hightower Judson R.
Morgenstern Norman
Myles Vale P.
The United States of America as represented by the United States
Weinberger James W.
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