Wireless power receiver

Abstract

A wireless power receiver is disclosed. A wireless power receiver according to various embodiments of the present disclosure includes a resonant reception unit configured to receive wireless power by a resonance scheme; an inductive reception unit configured to receive wireless power by an induction scheme; and a power processing unit configured to process wireless power received at the resonant reception unit and the inductive reception unit. When the wireless power is received by the induction scheme, a current flowing in the inductive reception unit is greater than a current flowing in the resonant reception unit, and when the wireless power is received by the resonance scheme, a current flowing in the resonant reception unit is greater than a current flowing in the inductive reception unit.

What is claimed is: 
     
       1. A wireless power receiver configured to receive wireless power, the wireless power receiver comprising:
 a first reception unit configured to receive wireless power by a first power transmission scheme based on a magnetic field at a first frequency; 
 a resonant second reception unit configured to receive wireless power by a resonance second power transmission scheme based on a magnetic field at a second frequency; 
 an inductive reception unit configured to receive wireless power by an induction scheme at a first frequency; and 
 a power processing unit circuit configured to process wireless power received at the resonant first reception unit and the inductive second reception unit; 
 wherein when the wireless power is received by the induction first power transmission scheme, a current flowing in the inductive first reception unit is greater than a current flowing in the resonant second reception unit, and when the wireless power is received by the resonance second power transmission scheme, a current flowing in the resonant second reception unit is greater than a current flowing in the inductive first reception unit, 
 wherein the resonant first reception unit comprises a first circuit comprising at least one first coil and at least one first capacitor, and the second reception unit comprises a second circuit comprising at least one second coil an and at least one fourth second capacitor, the inductive reception unit comprises a first circuit comprising at least one first coil and at least one first capacitor, and 
 wherein a first end of the first circuit is connected to a first end of the power processing circuit and a first end of the second circuit, and a second end of the first circuit is connected to a second end of the second circuit, and and a second end of the power processing unit are connected in parallel circuit. 
 
     
     
       2. The wireless power receiver of  claim 1 , wherein the first reception unit and the resonant second reception unit and the inductive reception unit are connected in parallel. 
     
     
       3. The wireless power receiver of  claim 2 , wherein the inductive first reception unit comprises:
 the first coil having a first end and a second end, and the first end of the first coil being connected to the power processing unit circuit; 
 the first capacitor having a first end and a second end, with the first end of the first capacitor being connected to the second end of the first coil; and 
 a second third capacitor having a first end and a second end, with the first end of the second third capacitor being connected to the first end of the first coil, and with the second end of the second third capacitor being connected to the second end of the first capacitor; and 
 wherein the resonant second reception unit comprises:
 the second coil having a first end and a second end; 
 a thirdthe second capacitor with a first end of the thirdsecond capacitor connected to the first end of the second coil, and with a second end of the thirdsecond capacitor connected to the second end of the first capacitor; and 
 thea fourth capacitor having a first end and a second end, with the first end of the fourth capacitor being connected to the second end of the second coil, and with the second end of the fourth capacitor connected to the second end of the second coil, the first end of the first coil, and the second end of the thirdsecond capacitor. 
 
 
     
     
       4. The wireless power receiver of  claim 3 , wherein the second capacitor, the third capacitor, the fourth capacitor and the second coil constitute a resonant the second circuit. 
     
     
       5. The wireless power receiver of  claim 3 , wherein at the second frequency defined in the resonance second power transmission scheme, an impedance of the first coil and the first capacitor in view of the power processing unit circuit exceeds a threshold. 
     
     
       6. The wireless power receiver of  claim 3 , wherein at the first frequenc frequency, an impedance of the second coil, the third second capacitor and the fourth capacitor in view of the power processing unit circuit exceeds a threshold. 
     
     
       7. The wireless power receiver of  claim 3 , wherein the first coil and the second coil are formed on one printed circuit board (PCB), and the first coil is formed on an inside of the second coil. 
     
     
       8. The wireless power receiver of  claim 7 , further comprising an antenna formed on the PCB. 
     
     
       9. The wireless power receiver of  claim 1 , where the resonant reception unit and the inductive reception unit are connected in series. 
     
     
       10. The wireless power receiver of  claim 9 , wherein the inductive reception unit comprises:
 the first coil having a first end and a second end, with the first end being connected to the power processing unit;   the first capacitor with a first end connected to the second end of the first coil; and   a second capacitor having a first end and a second end, with the first end being connected to the first end of the first coil, and with the second end connected to the second end of the first capacitor; and   wherein the resonant reception unit comprises:
 the second coil having a first end and a second end; and 
 the fourth capacitor having a first end and a second end, with the first end being connected to the first end of the second coil, and with the second end being connected to the second end of the second coil, the first end of the first coil, and the second end of the second capacitor. 
   
     
     
       11. The wireless power receiver of  claim 10 , wherein the second capacitor, the fourth capacitor and the second coil constitute a resonant circuit. 
     
     
       12. The wireless power receiver of  claim 10 , wherein at the second frequency, an impedance of the first coil and the first capacitor in view of the power processing unit exceeds a first threshold. 
     
     
       13. The wireless power receiver of  claim 12 , wherein at the first frequency, an impedance of the second coil and the fourth capacitor in view of the power processing unit is less than a second threshold different from the first threshold. 
     
     
       14. The wireless power receiver of  claim 1 , wherein the power processing unit circuit comprises at least one of:
 a rectifier configured to rectify wireless power in a form of an alternating current (AC) from at least one of the inductive first reception unit and the resonant second reception unit, into wireless power in a form of a direct current (DC); 
 a DC/DC converter configured to convert the wireless power rectified by the rectifier with a predetermined gain; and 
 a load configured to store the wireless power converted by the DC/DC converter. 
 
     
     
       15. The wireless power receiver of  claim 1 , wherein the inductive first reception unit is directly connected to the resonant second reception unit. 
     
     
       16. A wireless power receiver for receiving wireless power, comprising:
 a resonant circuit configured to receive wireless power by a resonance scheme at a second frequency; 
 a coil configured to receive wireless power by an induction a first power transmission scheme based on a magnetic field at a first frequency; and 
 a first circuit configured to receive wireless power by a second power transmission scheme based on a magnetic field at a second frequency; and  
 a power processing unit circuit configured to process wireless power received through the resonant first circuit and the coil; 
 wherein when the wireless power is received by the induction first power transmission scheme, a current flowing in the coil is greater than a current flowing in the resonant first circuit, and when the wireless power is received by the resonance second power transmission scheme, a current flowing in the resonant first circuit is greater than a current flowing in the coil, 
 wherein a first end of the resonant first circuit is connected to a first end of the coil and a first end of the power processing circuit, the coil, and the power processing unit are connected in parallel and a second end of the first circuit is connected to a second end of the coil and a second end of the power processing circuit. 
 
     
     
       17. A wireless power receiver comprising:
 a power reception unit configured to receive wireless power of a first frequency by an induction a first power transmission scheme based on a magnetic field, and receive wireless power of a second frequency by a resonance second power transmission scheme; and 
 a power processing unit circuit configured to process the wireless power of the first frequency range and the wireless power of the second frequency, 
 wherein the power reception unit comprises: 
 a shared capacitor used for both the induction first power transmission scheme and the resonance second power transmission scheme; 
 a first circuit configured to receive the wireless power of the first frequency range by the induction first power transmission scheme, with the shared capacitor; and 
 a second circuit configured to receive the wireless power of the second frequency by the resonance second power transmission scheme, with the shared capacitor, 
 wherein a first end of the first circuit, is connected to a first end of the second circuit, and and a first end of the power processing unit are connected in parallel circuit, and a second end of the first circuit is connected to a second end of the second circuit and a second end of the power processing circuit. 
 
     
     
       18. The wireless power receiver of  claim 17 , wherein at the second frequency, an impedance of the first circuit exceeds a threshold in view of the power processing unit circuit. 
     
     
       19. The wireless power receiver of  claim 17 , wherein at the first frequency, an impedance of the second circuit exceeds a threshold in view of the power processing unit circuit.