Wireless multi-charger system and controlling method thereof

Abstract

Disclosed are a wireless multi-charger system capable of saving the total charging time of a large number of wireless power transmission devices since one wireless multi-power transmission device includes a plurality of the wireless power transmission devices so that a large number of the wireless power transmission devices can be charged with electricity, and preventing the damage of the wireless power transmission devices and the wireless multi-power transmission device although foreign substances are put on charger blocks that are not charged.

1 - 12 . (canceled) 
     
     
         13 . A wireless multi-power transmission device for detecting a foreign substance, the multi-power transmission device comprising:
 a plurality of charger blocks each of which includes a primary charging core for generating a magnetic field to perform a wireless charging operation; and   a main controller which converts a charger block into a foreign substance detection mode when the main controller detects a foreign substance on the charger block.   
     
     
         14 . The wireless multi-power transmission device in accordance with  claim 13 , wherein the main controller stops the wireless charging operation on the charger block during the foreign substance detection mode. 
     
     
         15 . The wireless multi-power transmission device in accordance with  claim 14 , further comprising:
 a reception signal processor module which is coupled to the plurality of charger blocks to detect a detection signal received through a primary charging core corresponding to the charger block,   
       wherein the main controller detects the foreign substance if the detection signal is not a normal signal. 
     
     
         16 . The wireless multi-power transmission device in accordance with  claim 15 , wherein the reception signal processor module detects the detection signal according to a load modulation. 
     
     
         17 . The wireless multi-power transmission device in accordance with  claim 13 , wherein other charger blocks on which a secondary charging core is positioned perform the wireless charging operation. 
     
     
         18 . The wireless multi-power transmission device in accordance with  claim 13 , further comprising:
 an LCD panel which displays a foreign substance error in the charger block.   
     
     
         19 . The wireless multi-power transmission device in accordance with  claim 14 , wherein when the wireless charging operation stopped, the charger block is in a standby mode until a re-start signal is inputted into the charger block. 
     
     
         20 . A method for detecting a foreign substance by a wireless multi-power transmission device, the method comprising:
 generating a magnetic field to perform a wireless charging operation at a plurality of charger blocks, each of which includes a primary charging core; and   converting a charger block into a foreign substance detection mode when a foreign substance is detected on the charger block.   
     
     
         21 . The method in accordance with  claim 20 , further comprising:
 stopping the wireless charging operation on the charger block during the foreign substance detection mode.   
     
     
         22 . The method in accordance with  claim 21 , further comprising:
 detecting a detection signal received through a primary charging core corresponding to the charger block,   wherein the foreign substance is detected if the detection signal is not a normal signal.   
     
     
         23 . The method in accordance with  claim 22 , wherein the detection signal is detected according to a load modulation. 
     
     
         24 . The method in accordance with  claim 20 , wherein the wireless charging operation is performed at other charger blocks on which a secondary charging core is positioned. 
     
     
         25 . The method in accordance with  claim 20 , further comprising:
 displaying a foreign substance error in the charger block.   
     
     
         26 . The method in accordance with  claim 22 , wherein when the wireless charging operation stopped, the charger block is in a standby mode until a re-start signal is inputted into the charger block.