Cordless telephone with battery measuring section

Details Cordless telephone with battery measuring section Cordless telephone with battery measuring section

1994-12-21

1997-10-14

Bost, Dwayne

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, 455 383, 455343, 320 20, H04Q 720, H04Q 718

Patent

active

056779445

ABSTRACT:
In a cordless telephone apparatus, a mobile set is provided with a remaining a battery amount measuring section which is incremented or decremented in accordance with a value corresponding to an operating condition of the mobile set and a value corresponding to a charging current set by a charging current change=over circuit. A full charge condition is detected on the basis of a value measured by the remaining battery amount measuring section, and this is used to control the charging current. Thereby, it becomes possible to operate the mobile set from the battery even in the course of charging, and to control the charging time and the charging current considering the electric power used for the operation of the mobile set. Since the charging time and the charging current are accurately adjusted in accordance with use conditions of the mobile set, it becomes possible to prevent over-charging and under-charging.

REFERENCES:
patent: 4884294 (1989-11-01), Inagami
patent: 4992720 (1991-02-01), Hata
patent: 5185566 (1993-02-01), Goedken et al.
patent: 5248929 (1993-09-01), Burke
patent: 5254931 (1993-10-01), Martensson
patent: 5325041 (1994-06-01), Briggs
patent: 5333179 (1994-07-01), Burke et al.
patent: 5541491 (1996-07-01), Yamazaki

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