Qualcomm announced the next generation of in-display fingerprint sensors along with the Snapdragon 855 SoC. It says that these are already available to manufacturers and we can see them in action on the commercial phones of 2019.
The in-display technology used by phones like the OnePlus 6T and Huawei Mate 20 Pro use an optical sensor. This optical sensor flashes out the light on your finger and another sensor catches the reflected light back. This is why you see a flash while using in-display sensors. But the ultrasonic sensors used by Samsung and now, Qualcomm uses sound waves to replicate light waves and catches back the reflected sound. It provides more accuracy as the light waves get distorted by the light in the background but sound waves don’t. Also, it will make them work faster.
The new sensors are officially named “Qualcomm 3D Sonic Sensors”. The company claims the ultrasonic tech can accurately detect fingerprints through various contaminants on your finger because it isn’t easily blocked in the way the light used for an optical sensor can be. Also, unlike the optical display sensors, these do not require OLED displays to “see”. Thus, these can be used in LCDs as well.
Which type of fingerprint sensor does your phone have? Let us know in the comments below.