Color density stabilizer for electrochromic display

Details Color density stabilizer for electrochromic display Color density stabilizer for electrochromic display

1979-05-23

1981-10-13

Davie, James W.

Communications: electrical

Land vehicle alarms or indicators

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

340763, 340785, G02F 117

Patent

active

042945194

ABSTRACT:
A control circuit is adapted in connection with a driving circuit useful for an electro-optical device such as an electrochromic display device including an optical element, e.g., an electrochromic material of which coloration properties depend on surrounding temperature. The control circuit comprises a heat-sensitive element such as a thermister positioned adjacent to the electro-optical device for detecting the surrounding temperature, the element having a temperature coefficient varying on temperature, a circuit responsive to the heat-sensitive element for providing output signals, and the driving circuit responsive to the output signals from the circuit for controlling time intervals for which driving signals from the driving circuit are applied to the electro-optical device, whereby coloration shades of the optical element are approximately uniformed.

REFERENCES:
patent: 3725898 (1973-04-01), Canton
patent: 4045791 (1977-08-01), Fukai et al.
patent: 4160241 (1979-07-01), Shimizu et al.
patent: 4201985 (1980-05-01), Inami et al.

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