Display scanner finally learned to work with IPS displays

Although optical fingerprint scanners have long been installed in many smartphones these sensors are able to work together with the more expensive OLED displays. The main cause of failure of the display of the fingerprint scanners to work with LCD displays is the inability of the scanner to detect the light using this type of screen. Many manufacturers have tried to combat this problem, but all attempts were in vain, until finally the company Fortsense announced today that it has developed technology fingerprint scanner that can work even with LCD panels.

Screen fingerprint scanners use a special camera that captures the surface of the finger, and OLED panels allow the light to pass through the display and reach the sensor of this camera. The LCD panel does not allow light to penetrate the screen that interferes with work, under the screen of the scanner. In order for the scanner to work with LCD-screens, engineers Fortsense modified the panel backlight of the LCD display, allowing the light along a certain trajectory to pass through the display and reach the scanner.

In addition to the modification of the LCD display, the company has also used special algorithms optimized for the detection of fingerprints via LCD screen. Although the company has not indicated how the algorithms improve the fingerprint recognition, she mentioned that she uses the methods of deep machine learning and neural networks, which requires gradual learning and memorization algorithms of the fingerprint over time. Fortsense also stated that the use of these methods should enable the display of the fingerprint scanners to work with the same speed and accuracy as on modern scanners working with OLED panels.

Given the cost of OLED displays, screen fingerprint scanners are most often found in devices intended for high price segment of the smartphone market. But thanks to new technology Fortsense cheaper smartphones will be able to use the same biometric authentication as their expensive counterparts, like OnePlus and Huawei.

Despite the improvements made to fingerprint scanners, the very authentication technology may still face the same problems as in the previous implementations. For example, optical scanners are less secure than their newest ultrasonic counterparts, since the latter technology uses sound waves not only for reading print, but also to detect the presence of blood flow in the finger. Moreover, the new ultrasound scanners are also able to provide improved read speed, although their actual performance is still highly dependent on the manufacturer.

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