Electronic equipment having display device for displaying lifeti

Details Electronic equipment having display device for displaying lifeti Electronic equipment having display device for displaying lifeti

1990-07-03

1991-11-12

Heyman, John S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

340636, 377 16, 377 15, 377112, 368 10, 368204, 368244, 368251, H01M 1048

Patent

active

050650840

ABSTRACT:
An electronic equipment using a battery as an energizing power source includes a display unit, a signal generator for generating operation clocks while the electronic equipment is being actuated, a counter for measuring the number of the clocks, a calculator for calculating an operating time of the battery based upon the result of the counting operation by the counter, an estimating unit for estimating a consumption state of the battery based upon the result of the calculation by the calculator, and an informing unit for making the display unit display beforehand the expiration of the lifetime of the battery based upon the result of the estimation by the estimating unit.

REFERENCES:
patent: 3672154 (1972-06-01), Hubner
patent: 4180724 (1979-12-01), Councilman et al.
patent: 4380726 (1983-04-01), Sado et al.
patent: 4678998 (1987-07-01), Muramatsu
patent: 4743831 (1988-05-01), Young
patent: 4800336 (1989-01-01), Mikami et al.

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