Power source control circuit, portable information processing device, and power source control method
AssigneeSeiko Epson Corporation
InventorTakeo KITAZAWA
Life of this patent
Estimating the term…
Abstract
A power source control circuit includes a USB power supply portion that supplies electric power from a power source circuit to a secondary battery, a solar power supply portion, and a monitoring circuit. A monitoring circuit causes a solar power supply portion to stop the supply of the electric power to the secondary battery if the electric power is supplied from the power source circuit. In this way, if both the power supply by the power source circuit and the power supply by power generation by the solar cell can be performed, the power source control circuit can charge the secondary battery from the power source circuit which is a stable power source, and thus, it is possible to easily secure the electric power for driving the system.
Claims14
A power source control circuit comprising:
- a generated power supply portion that supplies electric power generated by a power generation mechanism to a secondary battery;
- a source power supply portion that supplies electric power supplied from a power source circuit to the secondary battery;
- and
- a monitoring circuit that stops the supply of the electric power from the generated power supply portion to the secondary battery if the electric power supplied from the power source circuit is supplied to the secondary battery,
- wherein the power source control circuit controls the supply of the electric power to the electronic circuit.
A power source control circuit comprising:
- a first power supply circuit that is electrically connected to a solar cell and a secondary battery and supplies electric power generated by the solar cell to the secondary battery;
- a second power supply circuit that is electrically connected to a charging terminal connected to an external power source and the secondary battery, and supplies the electric power from the external power source to the secondary battery;
- and
- a monitoring circuit that stops the supply of the electric power from the first power supply circuit to the secondary battery if the external power source is connected to the charging terminal.
A power source control method using a power source control circuit for driving an electric circuit that includes
- a first power supply portion that supplies electric power generated by a power generation mechanism to a secondary battery, and
- a second power supply portion that supplies electric power supplied from a power source circuit to the secondary battery, the method comprising:
- stopping, by a monitoring circuit, the supply of the electric power from the first power supply portion to the secondary battery if the power source circuit supplies the electronic power to the secondary battery.
Dependencies are inferred from the claim text.