Systems and methods for battery status indication

Details Systems and methods for battery status indication Systems and methods for battery status indication

2007-03-01

2011-10-25

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S636120, C340S636190

Reexamination Certificate

active

08044815

ABSTRACT:
A method and apparatus are provided to indicate battery capacity status. Different blinking frequencies of an LED correspond to different battery states of charge. Furthermore, the present invention provides a smooth visual brightness change of the LED by providing the appropriate LED current according to human eye characteristics.

REFERENCES:
patent: 5661645 (1997-08-01), Hochstein
patent: 5754124 (1998-05-01), Daggett et al.
patent: 5767659 (1998-06-01), Farley
patent: 5859506 (1999-01-01), Lemke
patent: 6784640 (2004-08-01), Mizuta et al.
patent: 2453555 (2001-10-01), None
patent: 2643330 (2004-09-01), None

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