Electrochromic matrix display

Details Electrochromic matrix display Electrochromic matrix display

1984-12-12

1987-02-17

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340811, G09G 334

Patent

active

046443444

ABSTRACT:
An electrochromic matrix display of the kind in which the display electrodes are supported on a substrate above a corresponding matrix of transistor switches employs constant current writing and potentiostatic erasure. The transistors are switchable by signals applied on respective gate lines to pass electric current on the respective drive lines to their display electrodes. Gate and drive selection means define the active gate and drive lines During erasure, the potentiostatic erase voltage is applied to both ends of the selected drive lines simultaneously to speed up the current limited asynchronous erase operation. Optionally, the display may be driven alternately from opposite ends of the drive lines during a line-by-line writing operation.

REFERENCES:
patent: 4082430 (1978-04-01), Schulthess et al.
patent: 4281324 (1981-07-01), Noromura et al.
patent: 4297695 (1981-10-01), Marshall
patent: 4346378 (1982-08-01), Shanks
patent: 4426643 (1984-01-01), Martin
patent: 4429304 (1984-01-01), Fujita
patent: 4481511 (1984-11-01), Hanmura et al.
patent: 4499459 (1985-02-01), Sasaki et al.

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