Complete bleaching of non-selected display electrodes in an elec

Details Complete bleaching of non-selected display electrodes in an elec Complete bleaching of non-selected display electrodes in an elec

1978-04-14

1980-07-01

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340785, 340811, 350357, G09F 932, G06F 314

Patent

active

042109094

ABSTRACT:
A driving system is provided for an electrochromic display device in which the coloration state is maintained for several hours through several days of the removal of the coloration voltage as long as the electrochromic display device is held in an electrically opened state. The coloration voltage is applied to a display electrode for a predetermined period of time in order to color the display electrode. When the display electrode is desired to be bleached, the bleaching voltage is continuously applied to the display electrode. That is, the application of the bleaching voltage is maintained for a period of time during which the display electrode is placed in the bleached state. The non-selected display electrodes (those not selected for coloration) are also continuously bleached until these non-selected display electrodes are selected for coloration.

REFERENCES:
patent: 3443859 (1969-05-01), Rogers
patent: 3736043 (1973-05-01), Sambucetti
patent: 3938131 (1976-02-01), VanDoorn et al.
patent: 4057739 (1977-11-01), Otake
Features of an Electrochromic Display Device, R.D. Giglia, Amer. Cyanamid Co., 5/76.

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