Wireless charging is likely to happen soon, and researchers at the University of Washington have developed a way to use lasers to safely charge your phone.
That is to say, you do not need to insert any cable, just through the room's laser transmitter can be charged.Research team hopes the technology can be widely used in the future, whether it is mobile phones, computers, or cameras, can achieve wireless charging .
This new technology marks the first time a laser has recharged a smartphone.
Invisible narrow beams that charge the phone charge the phone in the room, which researchers say can be recharged as fast as a traditional USB port.
The research team wrote in a report: 'In order to achieve the charging goal, the team installed a thin battery behind the smartphone and charged it with a laser.'
'In addition, the team customized security features designed to include metal plate radiators on smartphones to eliminate excess heat generated by lasers and a reflector-based mechanism to turn off the beam path of laser beams as they attempt to move.'
According to study author Shyam Gollakota, security is the number one priority, and the UW team takes it into account when designing it.
Gollakota said: 'We have designed, built and tested this laser-based charging system with a quick response safety mechanism to ensure that laser emitters terminate the charge beam before it enters the laser channel.'
According to author Arka Majumdar, the team's security mechanisms implemented in the study apply to a variety of environments, including the home and office.
The charge is transmitted by a thin beam of 2W power - up to about 14 feet away - to an area of 15 square inches.
But the range can be adjusted, the report states: 'The launcher can be modified to extend the radius of the charged beam from nearly 40 feet to 100 square centimeters.
This extension means the transmitter can target a wider charging surface, such as a counter or a desktop, and the phone can be recharged anywhere on this surface.
In the meantime, the team explained that the smartphone emits a high-frequency 'chirp' signal, but we are not disturbed while charging. 'Our ears did not hear these sounds, but for small microphones on laser transmitters It is very sensitive to this.
Vikram Iyer explains: 'This sound localization system ensures that the launcher can detect that the user has a smartphone on the charging surface, whether you're on a desk or elsewhere.'
