How to solve the screen protector problem of Samsung ultrasonic fingerprint unlock?
In principle, ultrasonic fingerprint recognition technology is based on ultrasonic waves, which are transmitted through sensors to the surface of the finger and receive echoes. The density difference between the skin and air on the fingerprint's surface was then used to build a 3D image of the fingerprint's unique valleys and ridges, which was then matched to the image stored in the phone.
The initial screen protector is too thick, your fingerprint can not be matched to the stored image so it cannot unck your phone. In order to successfully unlock, thinning the protective film is the most effective method.
Therefore, as a manufacturer of tempered film, we provide the following solutions for Samsung's curved surfaces with fingerprint unlocking.
— 3D edge glue with fingerprint sticker tempered glass
Edge glue is a double-sided adhesive, it can fit firmly to curved screens. In order to reduce the thickness of the screen protector, no glue on the middle of the glass and 0.25mm glass can reduce the thickness of the screen protector effectively. In addition, in order to enhance fingerprint unlock, in the unlock area has been added a special fingerprint sticker.
— 3D full glue tempered glass
The special adhesive layer with thick glue around and thin glue in the middle is used to solve the problem of curved screen fitting. Meanwhile, 0.25 glass with thin glue reduces the thickness of the protective film in the unlocking area, so as to effectively solve the problem of ultrasonic fingerprint unlocking.
—UV glue tempered glass
UV glue to solve the curved screen ultrasonic fingerprint unlocking method, from his more special installation method. Drop UV glue on the surface of the mobile phone, cover with 0.25 glass so that the glue naturally flow flat, before UV lamp curing, with the matching weight pressure in the fingerprint unlock an area, so that the glue in the fingerprint unlock area is thin so that the thickness of the overall protective film in the area is reduced.
—PMMA
Considering that the thickness of the glass is still not thin enough, we started to work on composite materials. The thickness of the overall substrate layer and glue layer of PMMA is only 0.29mm, which is similar to the thickness of the glass layer of the tempered film. As a soft film, there is no problem in the degree of adhesion on the curved screen, and the overall thickness has successfully solved the ultrasonic fingerprint unlock
—TPU
After PMMA, TPU came with an overall thickness of only 0.13mm, which is currently the thinnest protective film applied in ultrasonic fingerprint unlocking. And has a certain self-repair ability, can self-repair some small scratches.
Editor: Ace, Sales dept of OTAO
Post time: Nov-12-2021