Electrochromic information displays

Details Electrochromic information displays Electrochromic information displays

1974-07-16

1976-07-13

Jackmon, Edith Simmons

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

58127R, 324 94, 350160R, G04C 300, G04B 1906, G01R 2722, G02F 128

Patent

active

039686396

ABSTRACT:
Accumulating measuring devices which indicate the flow of electric current on graduated scale. Current flow may be of any fixed rate or value, steady or pulse, and scale may be any desired graduations. Current flow is indicated by a persistent electrochromic display material which changes color due to passage of electric current through it. The entire device is electronic, with no mechanical parts. Other accumulating functions may also be measured with the device if they can be converted first to electric current. One particular application is an elapsed time indicator, e.g. a watch or clock.

REFERENCES:
patent: 3194003 (1965-07-01), Polin
patent: 3589896 (1971-06-01), Wilcox
patent: R28199 (1974-10-01), Deb et al.

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