The market for fingerprint sensors embedded in the display (FoD) is in strong expansion: in 2018, the consistency of the segment was estimated at 29.5 million units shipped worldwide last year, the figure à passed to 228,3 million pieces (+674%), and is expected to reach 400 million by the end of the year. He says a recent report by the analysis firm Omdia: in short it is a solution more and more widespread and destined, and to replace the traditional fingerprint sensors capacitive sensors positioned on the edges or in the back of the smartphone.

According to Omdia in 2019 were 70 smartphones with a screen with integrated fingerprint reader. In a category not covered by the Apple devices, after the fingerprint reader in the home button of its iPhone and iPad, has chosen to take alternative routes focusing on the Face ID. The sensors FoD have been appreciated by producers and end users because they allow you to use the component for the biometric recognition without taking up space on the display with the frames and spoken without to relegate him in awkward positions (e.g. on the back of the terminal).

Of sensor technology, FoD has evolved over time, and the optical sensors are side-by-side ones even more precise type ultrasonic. In parallel, decreased the cost of development and components, the elements that have contributed to the wider dissemination and the possibility to employ it also in the smartphone is not high-end.

The evolutionary process is still in progress. Among the next goals is the production of modules with micro-lens even more subtle to retrieve valuable storage space for the remaining components of the smartphone; it also aims tointegration of the sensor in the LCD panels and not only on the OLED. Several companies are moving in this direction, 3M is the most recent of which has been reported in the order of time, but also Goodix Technology has announced that it has begun production. The latter occupies a leading position in the specific segment, holding about 50% of the market; the optical sensors continue to be those most widely used (about 79% of the deliveries in 2019), at the expense of the more expensive models ultrasonic.