Title:
ELECTRONIC EQUIPMENT
Document Type and Number:
Japanese Patent JPH1169652
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent the overcharge of a secondary battery by simple circuit constitution, and to utilize a total generated current effectively, by installing a driving-status control means for controlling a driving means, so that the consumption current of load is increased when a charging status estimated by a charging-status estimation means indicates the possibility of the over charge of the secondary battery. SOLUTION: A charge-discharge control section 6 controls the charging and discharging of a secondary battery 2 so that potential difference between a voltage value VSS at the other end of a capacitor 4 and a voltage VDD at one end of the secondary battery reaches the rated voltage of a system control section 5. The residual capacity of the secondary battery 2 is detected, and a detecting value is transmitted to the system control section 5. The system control section 5 compares residual quantity and a preset first threshold value, and all segments of a liquid-crystal panel 9 are brought to an on state during a time when residual quantity exceeds the first threshold value (during the tendency of overcharge). Accordingly, a generated current (a charging battery) is reduced the overcharge of the secondary battery is prevented, and the whole quantity of generation can be utilized effectively.
Inventors:
KOIKE KUNIO
NAKAMURA HIDENORI
NAKAMURA HIDENORI
Application Number:
JP21367197A
Publication Date:
March 09, 1999
Filing Date:
August 07, 1997
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
G04C10/00; G04G19/00; H02J7/00; H02J7/34; H02J7/35; (IPC1-7): H02J7/34; G04C10/00; G04G1/00; H02J7/35
Attorney, Agent or Firm:
Kawasakizaki Kenji (1 person outside)