Israeli startup turns luminaires into wireless power chargers: Page 2 of 4

January 15, 2018 //By Julien Happich
Israeli startup turns luminaires into wireless power chargers
At CES in Las Vegas, Israeli startup Wi-Charge unveiled the first ever solution of room lighting combined with wireless charging, designed for a café environment. The FDA-approved solution, dubbed LIGHT, can deliver up to 2.5W of power at a distance of up to 5 meters, simultaneously recharging a number of mobile and multimedia battery-powered applications across a room, totalling up to 50Wh/day.

In stark contrast, the company says it can deliver several watts of power over distances up to 10 meters, with very small components, offering a solution that can be readily deployed as a wireless charging infrastructure.

So, what's in a transmitter, and how does a transmitter precisely identify and target devices to be charged in a room? We asked.

"For aiming, as in all laser-based technologies or projectors, nothing beats micro-mirrors. They are the most cost-effective way to aim a laser, and depending on the application we can multiplex beams or use different mirrors or both. For larger devices such as smartphones, we may focus a single beam whereas for smaller devices such as sensors or webcams, we can use one beam sequentially polled to multiple devices" revealed Vaisleib.

As for the identification and acquisition of targets, the CEO explained that each target receiver blinks back with a particular pattern that allows the transmitter to discriminate the power needs of individual receivers. Built into the power transmitter, arrays of pin-diodes are arranged to triangulate and locate the different sources of signal, mapping the receivers in the room so they can be targeted with appropriate power levels.


A wall-plug transmitter beaming out power to different devices.

But you need an add-on receiver including the photovoltaic cell, and it could take some time to convince end-users to buy into this sort of infrastructure, we objected.

"Partners are approaching us to integrate our solution into all types of smart devices, for the wireless delivery of power to wireless cameras, door locks, smart speakers and other devices that are not yet as widespread as smartphones and whose adoption is stalled by battery life" the CEO answered.

"We see OEMs come to us to integrate the wireless power receivers into their devices with a wireless power supply that could be a wall-plug transmitter beaming out to different devices" he added.


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