Electrochromic display driver with faculties of stabilizing colo

Details Electrochromic display driver with faculties of stabilizing colo Electrochromic display driver with faculties of stabilizing colo

1979-11-15

1982-12-14

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

350357, 340763, G09G 334

Patent

active

043640400

ABSTRACT:
A driving circuit is provided for coloring and erasing a plurality of segment electrodes contained within an electrochromic display. The driving circuit comprises a first circuit for applying a constant current to at least one of the segment electrodes for coloring purposes, a second circuit for short circuiting the colored ones of the segment electrodes, and a third circuit for applying a constant voltage to at least one of the colored segment electrodes for erasing purposes. A plurality of pulses respectively resulting from the constant current and the constant voltage are applied to the selected segment electrodes on timesharing basis. The second circuit comprises a circuit element belonging to a part of the first circuit or a third circuit.

REFERENCES:
patent: 3987433 (1976-10-01), Kennedy
patent: 4201984 (1980-05-01), Inami et al.
patent: 4201985 (1980-05-01), Inami et al.
patent: 4209770 (1980-06-01), Hamada et al.
patent: 4210907 (1980-07-01), Hamada et al.
Electrochromic Display Devices, Bruinink, Proc. of 4th Brown-Boveri Symposium on Nonemissive Electro-optic Displays, 9/75, pp. 201-218.

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