CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2018-141659, filed on Jul. 27, 2018, entitled “ELECTRIC POWER TRANSMISSION APPARATUS, WIRELESS ELECTRIC POWER SUPPLY SYSTEM, AND ELECTRIC POWER TRANSMISSION METHOD”, the content of which is incorporated by reference herein in its entirety.

FIELD

Embodiments of the present disclosure relate generally to an electric power transmission apparatus, a wireless electric power supply system, and an electric power transmission method.

BACKGROUND

As described in Japanese Patent Application Laid-Open No. 2014-223018, a technology of supplying electric power from an electric power transmission apparatus to an electric power reception apparatus by using radio waves has been known.

SUMMARY

An electric power transmission apparatus and an electric power transmission method are disclosed. In one embodiment, an electric power transmission apparatus comprises a first antenna, a storage medium, and at least one first processor. The at least one first processor is configured to cause a first antenna to output a second radio wave for electric power supply in response to an electric power transmission request signal, when a first radio wave including the electric power transmission request signal is received from an electric power reception apparatus via the first antenna. The at least one first processor is configured to store information about an electric power transmission condition of the second radio wave transmitted in response to the electric power transmission request signal in the storage medium as history electric power transmission information. The at least one first processor is configured to cause the first antenna to output the second radio wave with the electric power transmission condition based on the history electric power transmission information, irrespective of whether or not the first radio wave has been received.

An electric power transmission method comprises the following. A first antenna is caused to output a second radio wave for electric power supply in response to an electric power transmission request signal, when a first radio wave including the electric power transmission request signal is received from an electric power reception apparatus via the first antenna. Information about an electric power transmission condition that is used when the second radio wave is transmitted in response to the electric power transmission request signal is stored in a storage medium as history electric power transmission information. The first antenna is caused to output second radio wave with the electric power transmission condition based on the history electric power transmission information, irrespective of whether or not the first radio wave has been received.

