Samsung Galaxy Z Fold 4 Will use Double-Sided Fingerprint Recognition

according to SAMMOBILE reports, Samsung Galaxy Z Fold 3 is a very feature-rich folding screen mobile phone. However, it does miss a feature of high-end smartphones, which is equipped with an in-screen fingerprint recognition sensor. This can be attributed to the phone’s unconventional plastic-glass hybrid screen. However, according to a new patent document from Samsung, the upcoming Samsung Galaxy Z Fold 4 folding screen phone may be equipped with an in-screen fingerprint recognition sensor.

LetsGoDigital accidentally found a Samsung patent on the World Intellectual Property Organization (WIPO) website, which talked about a double-sided fingerprint sensor. Basically, it will be located between the cover screen and the main screen. Since the cover screen uses a traditional AMOLED panel, it should not have trouble verifying fingerprints like other smartphones.

It also added that the two sensors will interface with the mainboard through a PCB (printed circuit board). It will be interesting to see what tricks Samsung uses to make the fingerprint sensor on the secondary display play its role.

Although the patent is not explicitly listed, Samsung may mix things up and use a combination of ultrasonic and optical fingerprint sensors. The cover display can use the former, and the main screen can use the latter. The optical fingerprint sensor on the main screen will be easy to calibrate, although it may take several iterations to perfect.

The evaluation of the Samsung Galaxy Z Fold 3 shows that the side fingerprint sensor of this folding screen phone is doing very well. Strictly speaking, Samsung has no reason to switch to optical/ultrasonic alternative technology, but this will help distinguish the Galaxy Z Fold 4 from its predecessors, and it will also become the world’s first folding-screen phone to adopt this technology.

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