In-Display Fingerprint Sensors And Cold Weather Could Mean Problems
The northern hemisphere is experiencing a chilly climate and this will be an issue when it comes to fingerprint sensors. This may not seem like a big deal but your fingerprint sensor may fail to work in cold weather. When it comes to in display fingerprint sensors they are really affected by cold weather. The design is faulty thus bringing this problem.
Cold changes a lot of things
In school we were taught that heat makes things expand and cold makes things contract. There is less moisture in cold air and this can cause a problem. This means your hands will be dry and mostly in your gloves. Cold, lint and dirt affects the sensitive of the fingerprint sensor.
When iPhone 5S was released it had a really good sensor but some complains were filled when users experienced issues with their fingerprint sensor. The fingerprint sensor on Galaxy Note 9 and that on Pixel 3 are better than expected. Electrical capacitors on a capacitive sensor reads where the whorls and ridges of your fingerprint are thus is able to unlock your phone.
Engineers have worked their way round
this tech and are trying to make it possible for you to unlock your phone in cold days with ease just the same as you would unlock your phone in hot days. Your capacitive fingerprint sensor is less accurate on December than how it is on March. The in display fingerprint sensor on your phone is likely to fail during winter.
Several phones have used the in display fingerprint sensor. They all mostly work the same way. There is no major difference between their tech. There is an optical fingerprint sensor which is placed under the OLED layer in the screen. In the area where you should place your finger, bright light is shined in between the pixels and everything inside that area is scanned.
When the phone is scanning your finger a set of data points is being build. The data will be sent to a hardware component which will act as a keyholder. The lock screen of your phone or an app can request this data and when you are scanning your finger it will only unlock if your finger matches the keyholder. If not then it won't unlock. Most biometric scanners are built in such a way that it can't be fooled.
Everyone loves the biometric scanner but they should only work when needed to work. Imagine you got a new phone, let's say you bought OnePlus 6T. Since you are excited about this new phone you add a couple of critical apps, sign into several accounts and then set up your fingerprint. After a while you try to unlock your phone but it won't unlock. You are left puzzled. You try again and nothing changes.
This is a common thing. Your phone is responding this way because it doesn't think that it is you who is unlocking your phone. This happens because from time to time you fingers could shrink due to cold and at times get dry. If your phone shrinks the edges on your fingerprint also changes. The new tech being used has been able to predict this changes but the optical sensors are unable to adapt.
No means no
When it comes to the biometric technology things are that easy. It can be quite tricky. The rate in which your phone reads a false reading as true should be less than 0.05%. It should happen once in two thousand times. This slight challenges really matter. Some biometric scanners take a while before they respond and this may cause inconvenience.
The information stored on our phone is quite critical. In my opinion a 6 digit PIN is better than an in display fingerprint sensor. The PIN is important but people want to unlock their phones fast thus they opt for the fingerprint sensor. False reading should rarely happen and if possible they shouldn't happen at all. If its fast access to your phone the fingerprint sensor should be reliable and accurate.
Devices such as OnePlus 6T have revolutionized the technology. They are showing that a fingerprint sensor can be fast and accurate at all times. Phone manufacturers such as Vivo and OnePlus or any other manufacturing company that has an in display fingerprint sensor may roll out an update that can solve this tiny issues.
You can fool the sensor using someone's else finger or you can always use a picture of the owner of the phone. The manufacturers of smartphones shouldn't allow such things to happen. Getting the balance right on this technology is the hard part.
As the technology scene keeps on changing the companies that started this tech will get better at it. They will improve on the software and hardware components.