Radio frequency charging system
First Claim
Patent Images
1. A radio frequency (RF) charging system, for charging an RF device that generates a response signal upon receiving an RF signal, the RF charging system comprising:
- an antenna set, comprising a plurality of antennas;
a switch unit, coupled to the antenna set;
an RF module, coupled to the switch unit, for generating the RF signal;
a microcontroller unit (MCU), coupled to the switch unit and the RF module, for controlling the switch unit to select from the antenna set an antenna that receives the response signal and has a highest transmit/receive efficiency among the plurality of antennas, and transmitting the RF signal through the selected antenna to charge the RF device; and
a display panel, coupled to the MCU,wherein the MCU estimates a distance between the RF device and the antenna set according to whether the antennas receive the response signal, and controls the display panel to display a predetermined area when the estimated distance indicates that the RF device is not within the predetermined area of the display panel, andwherein the antenna comprises concentric ring antennas in different sizes having a same center, and the MCU estimates the distance between the RF device and the center according to a smallest ring antenna capable of receiving the response signal.
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Abstract
A radio frequency (RF) charging system is capable of charging an RF device on a display panel to increase charging efficiency. The RF device generates a response signal upon receiving an RF signal. The RF charging system includes an antenna set having a plurality of antennas, a switch unit, an RF module and a microcontroller unit (MCU). The MCU controls the switch unit to select one antenna from the antenna set. The antenna is able to receive the response signal and is used for transmitting the RF signal, thereby charging the RF device.
43 Citations
15 Claims
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1. A radio frequency (RF) charging system, for charging an RF device that generates a response signal upon receiving an RF signal, the RF charging system comprising:
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an antenna set, comprising a plurality of antennas; a switch unit, coupled to the antenna set; an RF module, coupled to the switch unit, for generating the RF signal; a microcontroller unit (MCU), coupled to the switch unit and the RF module, for controlling the switch unit to select from the antenna set an antenna that receives the response signal and has a highest transmit/receive efficiency among the plurality of antennas, and transmitting the RF signal through the selected antenna to charge the RF device; and a display panel, coupled to the MCU, wherein the MCU estimates a distance between the RF device and the antenna set according to whether the antennas receive the response signal, and controls the display panel to display a predetermined area when the estimated distance indicates that the RF device is not within the predetermined area of the display panel, and wherein the antenna comprises concentric ring antennas in different sizes having a same center, and the MCU estimates the distance between the RF device and the center according to a smallest ring antenna capable of receiving the response signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RF charging system, for charging an RF device that generates a response signal upon receiving an RF signal, the RF charging system comprising:
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a display panel, for detecting a position of the RF device; an antenna set, having a plurality of antennas, wherein the antennas are concentric ring antennas in different sizes having a same center; a switch unit, coupled to the antenna set; an RF module, coupled to the switch unit, for generating the RF signal; and an MCU, coupled to the display panel, the switch unit and the RF module, for controlling the switch unit to select one antenna from the antenna set, so as to transmit the RF signal generated by the RF module and determining whether the selected antenna receives the response signal; wherein, the MCU transmits the RF signal via the antenna capable of receiving the response signal, so as to charge the RF device, and when the position of the RF device indicates that the RF device is not within a predetermined area of the display panel, the MCU controls the display panel to display the predetermined area. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification