Charging device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorHikaru Tamura
Life of this patent
Estimating the term…
Abstract
The charging circuit includes an antenna circuit receiving radio waves, a rectifier circuit rectifying AC voltage generated in the antenna circuit to generate DC voltage, and a power supply circuit adjusting the magnitude of the DC voltage and charging a rechargeable battery using the adjusted DC voltage. The charging device may further include a charge control circuit controlling the power supply circuit so as to prevent overcharge of the rechargeable battery. The rechargeable battery may be charged by application of DC voltage to a pair of terminals, or it may be charged wirelessly in such a manner that an oscillation circuit and an output antenna circuit are additionally provided.
Claims27
A charging device comprising:
- an antenna circuit for receiving a radio wave;
- a charging circuit for rectifying AC voltage generated in the antenna circuit to generate DC voltage and adjusting a magnitude of the DC voltage;
- a terminal configured to be supplied with the adjusted DC voltage;
- a first protective material covering the charging circuit and the terminal;
- and
- a second protective material covering the antenna circuit,
- wherein the terminal is adapted to be electrically connected to a rechargeable battery.
A charging device comprising:
- an antenna circuit for receiving a radio wave;
- a charging circuit for rectifying AC voltage generated in the antenna circuit to generate DC voltage and adjusting a magnitude of the DC voltage;
- a storage portion for storing a rechargeable battery to be charged by the charging circuit;
- a first protective material covering the charging circuit and the storage portion;
- and
- a second protective material covering the antenna circuit.
A charging device comprising:
- an antenna circuit for receiving a radio wave;
- a rectifier circuit for rectifying AC voltage generated in the antenna circuit to generate DC voltage;
- a power supply circuit for adjusting a magnitude of the DC voltage;
- a terminal configured to be supplied with the adjusted DC voltage;
- a charge control circuit for controlling the power supply circuit;
- a first protective material covering the rectifier circuit, the power supply circuit, the terminal, and the charge control circuit;
- and
- a second protective material covering the antenna circuit,
- wherein the terminal is adapted to be electrically connected to a rechargeable battery.
A charging device comprising:
- a first antenna circuit for receiving a first radio wave;
- a charging circuit for generating second AC voltage using first AC voltage generated in the first antenna circuit;
- a second antenna circuit for generating a second radio wave when the second AC voltage is supplied to the second antenna circuit;
- a first protective material covering the charging circuit and the second antenna circuit;
- and
- a second protective material covering the first antenna circuit.
A charging device comprising:
- a first antenna circuit for receiving a first radio wave;
- a rectifier circuit for rectifying first AC voltage generated in the first antenna circuit to generate DC voltage;
- a power supply circuit for adjusting a magnitude of the DC voltage;
- an oscillation circuit for generating second AC voltage when the adjusted DC voltage is inputted to the oscillation circuit;
- an oscillation control circuit for controlling the oscillation circuit;
- a second antenna circuit for generating a second radio wave when the second AC voltage is supplied to the second antenna circuit;
- a first protective material covering the rectifier circuit, the power supply circuit, the oscillation circuit, the oscillation control circuit, and the second antenna circuit;
- and
- a second protective material covering the first antenna circuit.
Dependencies are inferred from the claim text.