Counter electrode arrangement of an electrochromic display devic

Details Counter electrode arrangement of an electrochromic display devic Counter electrode arrangement of an electrochromic display devic

1979-09-20

1981-03-17

Davie, James W.

Communications: electrical

Land vehicle alarms or indicators

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

340785, G02F 117

Patent

active

042563801

ABSTRACT:
An electrochromic display device comprises a single counter electrode and a plurality of display electrodes. The counter electrode is charged and is maintained at a given potential by a donor electrode which transfers charge to the counter electrode in response to the action of a reference electrode. A potentiostat operates to supply current to the donor electrode in accordance with the potential of the counter electrode as sensed by the reference electrode. Both the donor electrode and the counter electrode are preferably of platinum black. The donor electrode is preferably arranged in the manner of a frame about the display area. The counter electrode is preferably grid-shaped.

REFERENCES:
patent: 4147416 (1979-04-01), Shimizu
patent: 4167308 (1979-09-01), Barclay et al.
patent: 4167309 (1979-09-01), Barclay et al.
patent: 4175836 (1979-11-01), Redman et al.
patent: 4215918 (1980-08-01), Dove

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