Liquid crystal display device with low battery indication

Details Liquid crystal display device with low battery indication Liquid crystal display device with low battery indication

1980-04-16

1982-05-04

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340636, 340765, 340811, 350332, G08B 536

Patent

active

043284906

ABSTRACT:
A liquid crystal display device comprises a liquid crystal display unit including a numeral display section and a unit display section, a dynamic driving circuit connected to said liquid crystal display unit to dynamically drive said numeral display section and a static driving circuit connected to said liquid crystal display unit to statically drive said unit display section, wherein numeral information and unit information are simultaneously displayed on said liquid crystal display unit and wherein the difference in contrast levels between the dynamically driven section and the statically driven section indicates when the battery needs replacing.

REFERENCES:
patent: 3738099 (1973-06-01), Tanaka
patent: 3991552 (1976-11-01), Ho et al.
patent: 3991553 (1976-11-01), Bergey et al.
patent: 4163935 (1979-08-01), Sakurada et al.

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