Electro-optical switching and memory display device
First Claim
1. An electro-optical display device comprising;
- wall means defining a housing, said wall means including a transparent wall and at least one other wall,display electrode means positioned on the inner side of said other wall,counter electrode means positioned on the inner side of said transparent wall,a thin electrically conductive polymer film incorporating pigment molecules embedded therein as counter ions, said film being disposed over the display electrode means,an electrolyte disposed within said housing and in conductive relationship with said counter electrode means and said film over the display electrode means,said display electrode means and said counter electrode means being adapted to have electric circuit means connected to them for selectively varying the electric potential applied by them across the electrolyte and the polymer film,said device being operable to electronically and rapidly change said pigment molecules embedded in the polymer film, responsive to predetermined variations in the electric potential applied across said film, thereby to selectively quickly change the color of said film as it is seen through said transparent wall.
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Accused Products
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.
28 Citations
12 Claims
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1. An electro-optical display device comprising;
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wall means defining a housing, said wall means including a transparent wall and at least one other wall, display electrode means positioned on the inner side of said other wall, counter electrode means positioned on the inner side of said transparent wall, a thin electrically conductive polymer film incorporating pigment molecules embedded therein as counter ions, said film being disposed over the display electrode means, an electrolyte disposed within said housing and in conductive relationship with said counter electrode means and said film over the display electrode means, said display electrode means and said counter electrode means being adapted to have electric circuit means connected to them for selectively varying the electric potential applied by them across the electrolyte and the polymer film, said device being operable to electronically and rapidly change said pigment molecules embedded in the polymer film, responsive to predetermined variations in the electric potential applied across said film, thereby to selectively quickly change the color of said film as it is seen through said transparent wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification