Electrical apparatus supplied by a photo-voltaic power source

Details Electrical apparatus supplied by a photo-voltaic power source Electrical apparatus supplied by a photo-voltaic power source

1997-12-17

2000-09-12

Riley, Shawn

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

368 64, 320140, G05F 110

Patent

active

061182583

ABSTRACT:
An autonomous low power consumption electrical apparatus that has a supply device (8) comprising a single photo-voltaic cell, an electrical accumulator (7), and a voltage booster (10, 11, TR1, TR3) connected between the power source (9) and the accumulator for charging the accumulator. The voltage booster is controlled by a pulse signal having a predetermined frequency. To allow the apparatus to start when the accumulator is completely discharged, the pulse signal can be generated, at least temporarily, by an oscillator that can operate at a very low voltage, that is, the voltage of the single photo-voltaic cell. When the apparatus is a timepiece, the oscillator (2) can be replaced by the oscillator of the time-keeping circuit (1) of the timepiece as soon as the accumulator (9) is sufficiently charged.

REFERENCES:
patent: 4882717 (1989-11-01), Hayakawa et al.
patent: 5747967 (1998-05-01), Muljadi et al.
Patent Abstracts of Japan vol. 096, No. 008, Aug. 30, 1996 & JP 08 107669 A (Sharp Corp).

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