Portable pad for wireless charging

Abstract

Some embodiments provide a system for charging devices. The system includes a master device and a slave device. Some embodiments provide a method for charging devices in a system that includes a slave device and a master device. The slave device includes (1) an antenna to receive a radio frequency (RF) beam and (2) a power generation module connected to the antenna that converts RF energy received by the slave antenna to power. The master device includes (1) a directional antenna to direct RF power to the antenna of the slave device and (2) a module that provides power to the directional antenna of the master device.

1 - 92 . (canceled) 
     
     
         93 . A method for using a chargeable slave device, said method comprising:
 wirelessly charging a portable pad;   using at least one portable pad coil in said portable pad for induction charging said chargeable slave device when said chargeable slave device is placed close to said portable pad.   
     
     
         94 . The method of  claim 93 , wherein said portable pad comprises a battery configured to be charged by a focused RF beam transmitted by a charging master device. 
     
     
         95 . The method of  claim 93 , wherein said portable pad comprises a battery configured to be charged when said portable pad is placed close to a master device coil of a charging master device. 
     
     
         96 . The method of  claim 93 , wherein said portable pad comprises a battery for driving said at least one portable pad coil. 
     
     
         97 . The method of  claim 93 , wherein said portable pad uses either a wireline or wireless connection to connect to the Internet or an Intranet. 
     
     
         98 . The method of  claim 93 , wherein said portable pad and said chargeable slave device communicate through an RF communication channel to exchange information using modulated RF signals. 
     
     
         99 . The method of  claim 93 , wherein said portable pad and a charging master device communicate through an RF communication channel to exchange information using modulated RF signals. 
     
     
         100 . A portable pad for providing power to a chargeable slave device, said portable pad comprising:
 a battery;   a circuit for RF communication with a charging master device or a chargeable slave device;   at least one portable pad coil in said portable pad for induction charging said chargeable slave device when said chargeable slave device is placed close to said portable pad.   
     
     
         101 . The portable pad of  claim 100 , wherein said battery is configured to be charged by a focused RF beam transmitted by said charging master device. 
     
     
         102 . The portable pad of  claim 100 , wherein said battery is charged when said portable pad is placed close to a master device coil of said charging master device. 
     
     
         103 . The portable pad of  claim 100 , wherein said portable pad uses either a wireline or wireless connection to connect to the Internet or an Intranet. 
     
     
         104 . The portable pad of  claim 100 , wherein said portable pad and said chargeable slave device communicate through an RF communication channel to exchange information using modulated RF signals. 
     
     
         105 . The portable pad of  claim 100 , wherein said portable pad and said charging master device communicate through an RF communication channel to exchange information using modulated RF signals. 
     
     
         106 . The portable pad of  claim 100 , wherein said portable pad is attached to a tablet device for wireless charging said tablet device. 
     
     
         107 . A system comprising:
 a chargeable slave device;   a portable pad, wherein said portable pad comprises a battery, a circuit for RF communication, and at least one portable pad coil for induction charging said chargeable slave device when said chargeable slave device is placed close to said portable pad;   a charging master device for providing power to said portable pad.   
     
     
         108 . The system of  claim 107 , wherein said battery is configured to be charged by a focused RF beam transmitted by said charging master device. 
     
     
         109 . The system of  claim 107 , wherein said battery is charged when said portable pad is placed close to a master device coil of said charging master device. 
     
     
         110 . The system of  claim 107 , wherein said portable pad uses either a wireline or wireless connection to connect to the Internet or an Intranet. 
     
     
         111 . The system of  claim 107 , wherein said portable pad and said chargeable slave device communicate through an RF communication channel to exchange information using modulated RF signals. 
     
     
         112 . The system of  claim 107 , wherein said portable pad and said charging master device communicate through an RF communication channel to exchange information using modulated RF signals.