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Liquid electrolyte type electrochromic display device
| Details |
Inventors: Barclay, Donald John; Bird, Colin Leonard; Hallett, Michael Henry; Kirkman, David Horrobin; Minshull, John Francis; Owen, Charles Edward;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Curtis; Marshall M.
Assistant Examiner:
Attorney, Agent or Firm: Jordan; John A., Wiener; Bernard N.
An electrochromic display device having first and second electrodes, and a plurality of display electrodes, all immersed in a liquid electrolyte. Drive means act to first generate a potential difference between said first and second electrodes to cause a color species to be deposited on said first electrode and, thereafter, act to generate a potential difference between said first electrode and selected ones of said plurality of display electrodes to cause the color species to be transferred to the selected ones of said plurality of display electrodes. Heptyl viologen dibromide is suggested as one possible electrolyte. |
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DETAILED DESCRIPTION In accordance with the principles of the present invention, an electrochromic display device is provided with first and second electrodes immersed in a liquid electrolyte, the electrodes and electrolyte being such that electric current between the electrodes causes a color absorbing species to be deposited on one of the electrodes.
In addition, a plurality of display electrodes are also immersed in the electrolyte.
Drive means are selectively operable, first to generate a potential difference between the first and second electrodes so that the said species is deposited on the first electrode, and subsequently to generate a potential difference between the first electrode and at least one selected display electrode such that the species is transferred to the selected display electrode or electrodes.
It is, therefore, an object of the present invention to provide an improved electrochromic display device.
It is a further object of the present invention to provide an electrochromic display device which is simplified in design.
It is yet a further object of the present invention to provide an electrochromic display device which exhibits improved performance.
It is yet still a further object of the present invention to provide an electrochromic display device which operates with low voltage.
It is another object of the present invention to provide a matrix display device with dot-shaped display electrodes arranged in rows and columns and a first and second electrode associated with each column of the display.
It is yet another object of the present invention to provide a seven-segment display with each of the seven display electrode segments all commonly associated with a first and second electrode.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of the preferred embodiments of the invention as illustrated in the accompanying drawings.
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Exercise Devices 
