Wireless charging apparatus and portable terminal including the same

Abstract

A wireless charging apparatus provided in an electronic device is provided. The wireless charging apparatus includes a charging resonance unit for wireless charging; a driving circuit unit to which the charging resonance unit is connected and to which an internal circuitry is mounted; a shield member mounted to a rear surface of the charging resonance unit; and a heat dispersion member mounted to the driving circuit unit and the shield member to disperse heat generated by the driving circuit unit.

What is claimed is: 
     
       1. A wireless charging apparatus provided in an electronic device, the wireless charging apparatus comprising:
 a battery; 
 a charging resonance unit for wireless charging the battery based on electromagnetic fields generated by an external charging pad; 
 a shield member, wherein the resonance unit is mounted on an upper surface of the shield member; 
 a driving circuit unit to which the charging resonance unit is electrically connected and to which an internal circuitry is mounted; 
 a shield member mounted to a rear surface of the charging metal plate covering the driving circuit unit; and 
 a heat dispersion member, mounted to at least one of a rear surface of the driving circuit unit and a rear surface of the shield member, to disperse heat generated by the driving circuit unit for dispersing heat, 
 wherein the heat dispersion member comprises:
 a first dispersion sheet mounted connected to the rear a lower surface of the driving circuit unit and connected to the heat emission plate so that the heat of the heat emission plate is transferred to the first dispersion sheet the metal plate; 
 a second dispersion sheet mounted connected to the rear a lower surface of the shield member; and 
 a plurality of connection passages connecting the first dispersion sheet and the second dispersion sheet, 
 
 wherein heat disperses from the first dispersion sheet to the second dispersion sheet or from the second dispersion sheet to the first dispersion sheet, and 
 wherein the first dispersion sheet is located under the driving circuit unit, and the second dispersion sheet is coplanar with the first dispersion sheet. 
 
     
     
       2. The wireless charging apparatus of  claim 1 , wherein a heat emission the metal plate for covering the driving circuit unit and dispersing the heat generated by the driving circuit unit is located on an upper surface of the driving circuit unit. 
     
     
       3. The wireless charging apparatus of  claim 1 , wherein the first dispersion sheet, the plurality of connection passages, and the second dispersion sheet are integrally formed. 
     
     
       4. The wireless charging apparatus of  claim 1 , wherein the heat emission metal plate is connected to the first dispersion sheet along a periphery of an upper surface of the first dispersion sheet so that the heat dispersed to the heat emission metal plate is transferred to the first dispersion sheet. 
     
     
       5. The wireless charging apparatus of  claim 4 , wherein the heat dispersion member is formed of a copper material. 
     
     
       6. The wireless charging apparatus of  claim 4 , wherein during wireless charging, the heat generated by the driving circuit unit is dispersed through the heat emission metal plate and is dispersed to the first dispersion sheet connected to the heat emission metal plate, and the heat transferred to the first dispersion sheet is dispersed to the second dispersion sheet through the plurality of connection passages. 
     
     
       7. An electronic device, comprising:
 a power receiving circuit configured to wirelessly receive power from an external wireless charging apparatus;   a shield member, wherein the power receiving circuit is mounted on an upper surface of the shield member;   a driving circuit unit electrically connected to the power receiving circuit and including internal circuitry for charging a battery of the electronic device;   a plate receiving heat from the driving circuit unit and covering the driving circuit unit; and   a heat dispersion sheet configured to disperse heat from at least one of the plate and the shield member,   wherein the heat dispersion sheet comprises:
 a first dispersion portion connected to a lower surface of the driving circuit unit and the plate; and 
 a second dispersion portion connected to a lower surface of the shield member, 
   wherein the first dispersion portion extends to the second dispersion portion via a plurality of connection passages,   wherein heat disperses from the first dispersion portion to the second dispersion portion or from the second dispersion portion to the first dispersion portion, and   wherein the first dispersion sheet is located under the driving circuit, and the second dispersion sheet is coplanar with the first dispersion sheet.   
     
     
       8. The electronic device of claim 7, wherein the power receiving circuit comprises a wireless power receiving antenna. 
     
     
       9. The electronic device of claim 7, wherein a shape of the heat dispersion sheet corresponds to a shape of the shield member. 
     
     
       10. The electronic device of claim 7, wherein the heat dispersion sheet comprises a copper sheet. 
     
     
       11. An electronic device, comprising:
 a power receiving circuit configured to wirelessly receive power from an external wireless charging apparatus;   a shield member, wherein the power receiving circuit is mounted to on an upper surface of the shield member;   a driving circuit unit electrically connected to the power receiving circuit and comprising an internal circuitry for charging a battery of the electronic device;   a plate receiving heat from the driving circuit unit and covering the driving circuit unit; and   a heat dispersion sheet configured to disperse heat from at least one of the plate and the shield member,   wherein the heat dispersion sheet covers at least part of the shield member and at least part of the plate,   wherein the heat dispersion sheet comprises:
 a first dispersion portion connected to a lower surface of the driving circuit unit and the plate, 
 a second dispersion portion connected to a lower surface of the shield member, and 
 a plurality of connection passages connecting the first dispersion sheet and the second dispersion sheet, 
   wherein heat disperses from the first dispersion portion to the second dispersion portion or from the second dispersion portion to the first dispersion portion, and   wherein the first dispersion sheet is located under the driving circuit unit, and the second dispersion sheet is coplanar with the first dispersion sheet.   
     
     
       12. The electronic device of claim 11, wherein the power receiving circuit comprises a wireless power receiving antenna. 
     
     
       13. The electronic device of claim 11, wherein the heat dispersion sheet comprises a copper sheet.