A new e-ink display needs no batteries, can be powered by a phone’s NFC chip
Now the Shenzhen-based company Waveshare used the specific characteristics of the technology to develop a new way to interact with and power e-ink screens, SlashGear reports. Waveshare created a whole slew of battery-free displays, getting power through the NFC wireless interface instead. Typically, NFC (Near-Field Communication) is used for transferring data between devices at short distances - for making payments with your smartphone on a POS terminal or signing digital documents. This type of connectivity can transfer small amounts of power too, and it appears to be enough to change the image on an e-ink display.
The Chinese company is already selling 2.13-, 2.9-, 4.2-, and 7.5-inch models, along with the necessary equipment for OEMs to make it work. The technology can lead to e-ink signposts, supermarket labels, medical records, and office boards, which won’t require power to operate and can be updated from any NFC-capable device. Putting such a display in a smartphone case or a back cover will give you an integrated e-book reader, getting power from the phone’s NFC antenna, so there’s also that.