According to foreign media reports, 3M has developed a new technology that enables smartphones with LCD screens to have in-display fingerprint readers, which are typically used for more expensive OLED screen devices.
The new 3M Near Infrared Transmission System (NITS) uses an advanced ultra-thin 3M optical display film to allow the fingerprint recognition optical sensor to be placed behind the LCD screen. Previously, these films would block optical sensors from "seeing" your fingerprint, but their new film diaphragm blocks 97 percent of light in visible light but is transparent in infrared, allowing the infrared optical sensor to read your fingerprint.
The fingerprint recognition system can be used on tablets, laptops and other LCD devices, and will bring display fingerprint readers to more and cheaper devices.
Apple has patented similar under-screen fingerprint technology several times before, such as embedding a communication antenna in the watch band, but mentions that the watch's screen may include one or more input devices, such as touch sensing devices, sensing devices, temperature sensing devices and/or fingerprint sensors.