Electrochromic display device
First Claim
Patent Images
1. An electrochromic display device comprising:
- a hollow panel enclosing an electrolyte and having a first transparent face and a second face,a counter electrode located on the inner surface of the said transparent face, said counter electrode containing material that undergoes a reversible redox reaction in said electrolyte at a known potential, said counter electrode being opaque and having the shape of a pattern of lines, anda plurality of display electrodes on the inner surface of said second face.
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Abstract
An electrochromic display device adapted to be accurately erased has an opaque counter electrode in the shape of a pattern of lines, preferably reticulate, on the underside of the face of the display device through which the display is viewed. The counter electrode is brought to a predetermined potential either by trapping a suitable material capable of a reversible redox reaction at the counter electrode or by initially charging the counter electrode with heptyl vilogen cation radical. This enables voltage erase to be used.
7 Citations
13 Claims
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1. An electrochromic display device comprising:
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a hollow panel enclosing an electrolyte and having a first transparent face and a second face, a counter electrode located on the inner surface of the said transparent face, said counter electrode containing material that undergoes a reversible redox reaction in said electrolyte at a known potential, said counter electrode being opaque and having the shape of a pattern of lines, and a plurality of display electrodes on the inner surface of said second face. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electrochromic display device comprising:
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a hollow panel enclosing an electrolyte containing heptyl viologen dications and having a first transparent face and a second face, a counter electrode located on the inner surface of the said transparent face, said counter electrode containing a material that undergoes a reversible redox reaction in said electrolyte at a known potential, said counter electrode being opaque and conductive and having the shape of a pattern of lines, and a plurality of display electrodes on the inner surface of said second face. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification