In the 21st Century ,with the advent of Modern Electronic Technology security has became more significant.Authentication is a major security framework used in Mobiles , from being used as Password,PIN ,Pattern to Facial Recognition Scanners,Iris Scanners and Fingerprint Scanners.One of the major advents in this trend is the In-Display Fingerprint Scanners.
There was a sharp demand of technology for easier and smarter authentication.Fingerprint Scanner fulfilled this demand and lived upto the expectations of Smartphone Users.It first resided in the front panel of the Smartphone on the Home Screen button.However with demand of removal of bezels on Smartphones the Home Screen button was removed and the next natural position of Finger Sensors was in the rear end of the Smart Phone.However these designs were often criticized especially because of manufacturers like Samsung placing them in hard to access areas.
Innovation is always guaranteed with binding necessity.Fingerprint Sensors became more realistic after Qualcomm gave a short demo on the Technology that they were testing.Reaching to the peak was Vivo with launching the first Commercial Phone Vivo V11 Pro which had In-Display Finger Print Sensors.
Today there are a Number of SmartPhones in market using this technology which are manufactured by companies like Vivo,Samsung,Huawei,Nokia,Oppo,Xiaomi,One Plus.Some of the Popular Models using In-Screen Fingerprint Sensors are
Samsung Galaxy S10+/S10 , OnePlus 6T , Nokia 9 PureView , Oppo K1 ,Xiaomi Mi 9 and Huawei Mate 20 Pro .
The key technology used in making in-screen finger scanner is an optical fingerprint scanner which is embedded in the phone’s display screen.Some finger scanners use CMOS Chip called Clear ID Sensor for better quality scanning.
When the User places it’s finger on the screen the Scanner illuminates the finger by use of light emitting diodes.A CCD Camera inside the screen captures an image of the finger .It rejects the image if image is not rendered properly and retakes picture.It now matches the image with a set of pre-existing Images.
One major difference of In-Display Finger Scanner is that it cannot detect pulses.However a major advantage of it over other sensors are that it can detect fingerprints of both wet,dry and cold fingers.