System for wireless power transmission and communication
A system is disclosed that includes a wireless power receiver, a battery charging system coupled to the wireless power receiver and configured to charge a battery using power received from the wireless power receiver and a wireless data communication system coupled to the wireless power receiver and the battery charging system, the wireless data communication system configured to determine a power requirement and to transmit the power requirement using the wireless power receiver.
1. A system comprising:
a wireless power receiver;
a battery charging system coupled to the wireless power receiver and configured to charge a battery using power received from the wireless power receiver;
a wireless data communication system coupled to the wireless power receiver and the battery charging system,
the wireless data communication system configured to determine a power requirement and to transmit the power requirement using the wireless power receiver at a frequency derived from and different from a transmission frequency detected by a frequency detector at the wireless power receiver; and
a data encoding system configured to encode one or more bits representing a pulse width into a data packet to control a power signal transmitted to the wireless power receiver at the transmission frequency detected by the frequency detector.
2. The system of claim 1 , wherein each bit comprises a pulse width that reduces loss of resonance.
3. The system of claim 1 , wherein at least two bits are used to indicate that more power should be transmitted.
4. The system of claim 1 , wherein at least two bits are used to indicate that no change should be made in the level of power that is transmitted.
5. The system of claim 1 , wherein at least two bits are used to indicate that less power should be transmitted.
6. The system of claim 1 , wherein at least two bits are used to indicate that no more power should be transmitted.
7. The system of claim 1 , wherein at least two bits are used to indicate a battery charging level.
8. The system of claim 1 , wherein at least two bits are used to indicate a control record check having a predetermined pulse width.
9. A method comprising:
receiving power at a wireless power receiver;
charging a battery using power received from the wireless power receiver;
determining a power requirement;
transmitting the power requirement using the wireless power receiver using a frequency derived from and different from a transmission frequency detected by a detector at the wireless power receiver; and
encoding one or more bits into a data packet to control a power signal transmitted to the wireless power receiver, wherein each bit has a different pulse width if it is determined that a voltage is greater than an under voltage lockout level.
10. The method of claim 9 , wherein at least one bit comprises a pulse width that reduces loss of resonance.
11. The method of claim 9 , wherein at least one bit has a different pulse width from a pulse width used to encode non-power data.
12. The method of claim 9 , wherein at least two bits are used to indicate that no change should be made in the level of power that is transmitted, wherein each bit has a different pulse width.
13. The method of claim 9 , wherein each bit has a different pulse width and transmission period.
14. The method of claim 9 , wherein each bit has one of a first pulse width or a second pulse width.
15. The method of claim 9 , wherein at least two bits are used to indicate a battery charging level.
16. The method of claim 9 , wherein one bit has a first pulse width and a second bit has a second pulse width that is different from the first pulse width.