US 2013/0293202 A1Published application

Electronic device

AssigneesThe Ritsumeikan Trust, Seiko Instruments Inc.

InventorsFumiyasu UTSUNOMIYA, Takakuni DOUSEKI, Ami TANAKA

Life of this patent

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Abstract

Provided is an electronic device capable of supplying desired electric power to a load so as to operate the load even in a case where charged power is minute and a voltage increase rate of a capacitor, which increases by charge, is low. The electronic device includes: a power source which has supply power less than consumption power of the load; a capacitor to be charged with the supply power; and a charge/discharge control circuit which controls charging of the capacitor and consumption of charged power of the capacitor by the load, and the charge/discharge control circuit includes: a first node to which the supply power of the power source is supplied; and a circuit which charges the capacitor with the supply power from the first node.

Claims3

Dependent claims

An electronic device, comprising:

a load which has a desired function;
a power source which has supply power less than consumption power of operation of the load;
a capacitor to be charged with electric power based on the supply power;
and
a charge/discharge control circuit which controls charging of the capacitor with the electric power based on the supply power and consumption of charged power of the capacitor by the load,
wherein the charge/discharge control circuit comprises:
a first node to which the electric power based on the supply power is supplied;
and
a circuit which charges the capacitor with the electric power supplied to the first node, and
wherein, when it is detected that a voltage of the first node is a predetermined voltage or more, one of reduction and interruption of the electric power charging the capacitor is performed, and thereafter the load is operated by the charged power of the capacitor.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/871,380Filed 26 Apr 2013
Priority: JP 2012-1045391 May 2012
Published: 7 Nov 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H02J 7/00
Circuit arrangements for charging or discharging batteries or for supplying loads from
H02J 7/865
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: battery or charger load switching, e.g.…
H01M 10/44
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: methods for charging or discharging
H02J 7/345
Parallel operation in networks using both storage and other DC sources, e.g. providing buffering: using capacitors as storage or buffering devices