The research behind smartphones has progressed across staggering distances, material and various forms of waves. All of the new ways scientists are charging smartphones are impressive, but the method originating from South Korea can charge 40 at the same time.
With a Dipole Coil Resonant System, or DCRS, South Korean researchers were able to change 40 smartphones concurrently over a distance of five meters. The technology is equally efficient since it can be used to charge a large LED television and three 40 W fans. The future is watching unplugged TVs and getting fanned by fans without cords. You can even charge your phone while using it as a second screen. It’s magical because thin air can be a place where currents live.
A bit more technical details from the makers:
Since MIT’s (Massachusetts Institute of Technology) introduction of the Coupled Magnetic Resonance System (CMRS) in 2007, which used a magnetic field to transfer energy for a distance of 2.1 meters, the development of long-distance wireless power transfer has attracted much attention for further research.
However, in terms of extending the distance of wireless power, CMRS, for example, has revealed technical limitations to commercialization that are yet to be solved: a rather complicated coil structure (composed of four coils for input, transmission, reception, and load); bulky-size resonant coils; high frequency (in a range of 10 MHz) required to resonate the transmitter and receiver coils, which results in low transfer efficiency; and a high Q factor of 2,000 that makes the resonant coils very sensitive to surroundings such as temperature, humidity, and human proximity.