Power control circuit, electronic instrument, and charging method
First Claim
1. A power control circuit used in an electronic instrument that is provided with a universal serial bus (USB) interface, wherein when the electronic instrument has been set to a slave side for USB data transfer and has been set to normal operating mode, the power control circuit supplies power from a USB power line, power from a rechargeable battery, or power from an external power source to a data transfer control circuit which controls USB data transfer;
- and wherein when the electronic instrument has been set to the slave side for USB data transfer and has been set to charge mode, the power control circuit supplies power from the USB power line to the rechargeable battery of the electronic instrument in order to charge the rechargeable battery.
2 Assignments
0 Petitions
Accused Products
Abstract
When an electronic instrument Q is in normal operating mode and set to be slave, power from a rechargeable battery or an external power source is supplied to a data transfer control circuit, and when the electronic instrument Q is in charge mode and set to be slave, power from VBUS is supplied thereto to charge a rechargeable battery. When an external power source can be used in charge mode, power from the external power source is supplied to the rechargeable battery instead of from VBUS. When an electronic instrument P is in normal operating mode and set to be master, power from a rechargeable battery or an external power source is supplied to the data transfer control circuit and the electronic instrument Q; and when the electronic instrument P is in charge mode and set to be master, power from the rechargeable battery or the external power source is supplied to the electronic instrument Q through the VBUS in order to charge a rechargeable battery of the electronic instrument Q. In charge mode, the supply of power to the data transfer control circuit is either turned off or an energy-saving mode is set.
110 Citations
24 Claims
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1. A power control circuit used in an electronic instrument that is provided with a universal serial bus (USB) interface,
wherein when the electronic instrument has been set to a slave side for USB data transfer and has been set to normal operating mode, the power control circuit supplies power from a USB power line, power from a rechargeable battery, or power from an external power source to a data transfer control circuit which controls USB data transfer; - and
wherein when the electronic instrument has been set to the slave side for USB data transfer and has been set to charge mode, the power control circuit supplies power from the USB power line to the rechargeable battery of the electronic instrument in order to charge the rechargeable battery. - View Dependent Claims (2, 3, 7, 10, 13, 16, 19)
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4. A power control circuit used in an electronic instrument that is provided with a universal serial bus (USB) interface,
wherein when the electronic instrument has been set to a master side for USB data transfer and has been set to normal operating mode, the power control circuit supplies power from a rechargeable battery or power from an external power source to a data transfer control circuit which controls USB data transfer; - and
wherein when the electronic instrument has been set to the master side for USB data transfer and has been set to charge mode, the power control circuit supplies power from the rechargeable battery or power from the external power source to another electronic instrument on a slave side through a USB power line, in order to charge a rechargeable battery of the other electronic instrument on the slave side connected to the electronic instrument by USB. - View Dependent Claims (5, 8, 11, 14, 17, 20)
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6. A power control circuit used in an electronic instrument that is provided with a universal serial bus (USB) interface,
wherein when the electronic instrument has been set to a slave side for USB data transfer and has been set to normal operating mode, the power control circuit supplies power from a USB power line, power from a rechargeable battery, or power from an external power source to a data transfer control circuit which controls USB data transfer; -
wherein when the electronic instrument has been set to the slave side for USB data transfer and has been set to charge mode, the power control circuit supplies power from the USB power line to the rechargeable battery of the electronic instrument in order to charge the rechargeable battery;
wherein when the electronic instrument has been set to a master side for USB data transfer and has been set to normal operating mode, the power control circuit supplies power from the rechargeable battery or power from the external power source to the data transfer control circuit which controls USB data transfer; and
wherein when the electronic instrument has been set to the master side for USB data transfer and has been set to charge mode, the power control circuit supplies power from the rechargeable battery or power from the external power source to another electronic instrument on the slave side through the USB power line, in order to charge a rechargeable battery of the other electronic instrument on the slave side connected to the electronic instrument by USB. - View Dependent Claims (9, 12, 15, 18, 21)
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22. A charging method for an electronic instrument that is provided with a universal serial bus (USB) interface, comprising:
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supplying power from a first electronic instrument on a master side through a USB power line to a second electronic instrument on a slave side and charging a rechargeable battery of the second electronic instrument, when the first electronic instrument has been connected to a first plug of a USB cable and is set to the master side and the second electronic instrument has been connected to a second plug of the USB cable and is set to the slave side; and
supplying power from the second electronic instrument on the master side through the USB power line to the first electronic instrument on the slave side and charging a rechargeable battery of the first electronic instrument, when the first electronic instrument has been connected to the second plug of the USB cable and is set to the slave side and the second electronic instrument has been connected to the first plug of the USB cable and is set to the master side. - View Dependent Claims (23, 24)
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Specification