Power feeding device, wireless power feeding system using the same and wireless power feeding method
First Claim
Patent Images
1. A power feeding system comprising:
- a power receiver; and
a power feeding device,wherein the power receiver comprises;
a display panel configured to display an image;
a transmission/reception circuit portion configured to transmit and receive electromagnetic waves;
a signal processing circuit portion configured to process electrical signals of the transmitted and received electromagnetic waves;
a power storage portion comprising a secondary battery; and
a power load portion electrically connected to the power storage portion,wherein the power feeding device comprises;
a first oscillation circuit;
a mixer;
a coupler;
a determination circuit; and
a second oscillation circuit,wherein the display panel is overlapped with the transmission/reception circuit portion, the signal processing circuit portion, the power storage portion, and the power load portion,wherein the coupler is configured to detect a signal reflected from the power receiver,wherein the determination circuit is configured to output a reflection coefficient to the second oscillation circuit, the reflection coefficient being based on the signal detected by the coupler, andwherein the mixer is configured to output a mixed signal to an antenna circuit, the mixed signal being generated by mixing a first power signal generated by the first oscillation circuit and a second power signal generated by the second oscillation circuit.
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Abstract
An object is to provide a power feeding device, a power feeding system, and a power feeding method which are more convenient for a power feeding user at the power receiving end. The power feeding device includes a means of controlling a frequency of a power signal transmitted to a power receiver, based on a proportion of signals, among power signals output to an antenna circuit, that return from the power receiver to the antenna circuit without feeding power to the power receiver.
88 Citations
7 Claims
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1. A power feeding system comprising:
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a power receiver; and a power feeding device, wherein the power receiver comprises; a display panel configured to display an image; a transmission/reception circuit portion configured to transmit and receive electromagnetic waves; a signal processing circuit portion configured to process electrical signals of the transmitted and received electromagnetic waves; a power storage portion comprising a secondary battery; and a power load portion electrically connected to the power storage portion, wherein the power feeding device comprises; a first oscillation circuit; a mixer; a coupler; a determination circuit; and a second oscillation circuit, wherein the display panel is overlapped with the transmission/reception circuit portion, the signal processing circuit portion, the power storage portion, and the power load portion, wherein the coupler is configured to detect a signal reflected from the power receiver, wherein the determination circuit is configured to output a reflection coefficient to the second oscillation circuit, the reflection coefficient being based on the signal detected by the coupler, and wherein the mixer is configured to output a mixed signal to an antenna circuit, the mixed signal being generated by mixing a first power signal generated by the first oscillation circuit and a second power signal generated by the second oscillation circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification