Battery remaining amount warning circuit

Details Battery remaining amount warning circuit Battery remaining amount warning circuit

2005-07-26

2005-07-26

Wu, Daniel (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S636120, C340S636190, C340S661000, C320S149000

Reexamination Certificate

active

06922151

ABSTRACT:
The battery remaining amount warning circuit can issue a battery remaining amount warning after battery power is fully used, reduce current consumption, and issue a warning at appropriate timing for various types of battery. A system controller calculates DC resistance value of the battery from a difference between a current value in an operating mode before a change which is stored in the memory and a current value in an operating mode after the change which is stored in the memory and a voltage variation of the battery measured by an A/D converter, and when the calculated DC resistance value becomes greater than a predetermined value, the system controller sends a warning instruction signal to a data LCD.

REFERENCES:
patent: 4356481 (1982-10-01), Kuki
patent: 5164652 (1992-11-01), Johnson et al.
patent: 5237257 (1993-08-01), Johnson et al.
patent: 5905364 (1999-05-01), Ookita
patent: 6150823 (2000-11-01), Takahashi et al.
patent: 6232747 (2001-05-01), Takahashi et al.
patent: 6744698 (2004-06-01), Koyama et al.
patent: 55-136818 (1980-10-01), None
patent: 63-3538 (1988-01-01), None

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