A Closer Look at the Interesting Sensitivity of Touchscreens

Khryss | Published 2017-09-28 01:57

Fingerprint-sensitive.

How much do you really know about the touching mechanism of your phone screens? Did you know how long would it really take to engage your fingers in full contact of a touchscreen? Well, it's time for a random fun fact!

Michael Adams and Brygida Dzidek at the University of Birmingham, UK, and their team asked two participants to wash and dry their index finger before pressing it against a glass surface. They were instructed to add force gradually as the experiment goes. Results showed that it was only after 30 seconds that one's entire fingerprint was visible.

This is because when the skin is dry, the keratin in its outer layer is inflexible. That is, only the high points of the fingerprint touch the screen a few seconds after you push a finger against it. However, since fingertips sweat quickly, such moisture is absorbed by the skin consequently leading to a much more flexible keratin that enables the finger's full contact.

“Most of us have ignored the effect of time when doing our own research on fingerprints,” says Roland Ennos at the University of Hull, UK.

Now, with the continuing advancements on touchscreens, companies are already designing one that utilized ultrasonic vibrations for a "smoother" glass texture. This is illusion is made possible by varying the frequency of vibration when touched. This update reduces the skin-screen friction which actually spells for problem as it results to intermittent contact with the glass. Ultimately, this can lead to responsiveness problems.

Smoother glide or a more sensitive screen? Be sure to choose what's more worthy for you!

https://www.newscientist.com/article/2148488-it-takes-30-seconds-for-your-fingerprint-to-grip-your-smartphone/

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