Think about the causes and countermeasures that fingerprint authentication cannot be performed with a smartphone

　The time of the mask must arrive.It is a difficult era for those who use face authentication for smartphone biological authentication.Nevertheless, even if you are a fingerprint authentication smartphone, you feel that this is tough in the season when your skin is dry, such as winter and early spring.

　Why is that season tough for fingerprint authentication?Is there any countermeasure?

Review the mechanism of fingerprint authentication

　The electrostatic capacity system is adopted by many smartphone fingerprint authentication sensors.This is based on the fact that the human body is a conductor (substance that passes electricity), which captures the fingerprint ridge and the weakened capacity flowing on the fingerprint and the valley line (so -called irregularities), and mapping them.Record the data, referring to it and authenticated.

　The iPhone and iPad's Touch ID, and the Android device on the iPhone, and the fingerprint sensor mounted on the home button, power key, and back.

　Recently, there is also an Android device equipped with an in -screen fingerprint sensor to increase the area of the display.There is an optical and ultrasonic type, and both use the return value of the light and ultrasound emitted by the sensor.

　The light emitted from the inside of the panel is rebelliously reflected in the ridge of the fingerprint in contact with the panel, and it returns strongly (it becomes bright) because it only reflects on the panel on the valley line.The seal is recorded as a data and is composed.

　In the ultrasonic type, the angle is added to this (however, the return value is the opposite of the optical type).The ultrasonic waves that hit the valley line of the fingerprint are weakened, weakened, and return strongly on the ridgeline.In addition, the angle between the ridge line and the valley line detects, so it is said that it is more secure than an optical formula.

Why is drying a great enemy of fingerprint authentication?

　A convenient fingerprint authentication system that allows you to unlock the screen simply by removing your finger and sliding your finger (although it is necessary to hold down the fingerprint authentication).Once you have experienced this comfort, you will not be authenticated no matter how many times you hold down the sensor, and as a result, the situation where you have to make a PIN code, passcode, pattern input, etc. is truly frustrating.

　It is difficult for fingerprint authentication to pass through the season when the skin is dry, such as winter and early spring.In the winter, when the pressure of Nishitaka East low, the air dries on the Pacific Ocean side.By the way, in my home, where the humidifier has not been built after the broken humidifier has been broken, the humidity in the room has always changed at 25-35 %, and it was dried so that it could not be measured ("LO" display) in severe cases.I put a wet towel here and there and managed to aim for more than 30 %.

　Quiet story rest.

　The reason why fingerprint authentication is difficult to pass in the dry season is that the skin loses moisture, causing power via water to occur, and the fingerprint sensor of the electrostatic capacity system does not respond ...If the moisture comes off, the fingerprints will not be clear, or wrinkles will be transformed by the fingerprint ridge and valley lines.

　In addition, dry skin may cause dry skin.The rough fingertips can make a small scratch, which is determined that this fingerprint is different.

　As a result, not only the capacity system but also the in -screen fingerprint authentication will not work.

Smartphone users value skin care

　So how can you unlock your smartphone with fingerprint authentication comfortably even in the season when it tends to dry?

　One is by paying attention to the moisturizing fingertips.If you are worried about drying, apply hand cream etc., massage well, and take care of your fingertips.However, excess oil can also cause malfunction, so in the daytime, use as small amount of cream as possible and maintain the main care before bedtime.

　Another method is not only to register multiple fingerprints, but also to register a finger that is difficult to authenticate if it is difficult to authenticate.If you register something that has been rough and has changed as a new fingerprint, the probability of authentication will increase.

　With a Touch ID, there is a way to use a pseudo fingerprint."DIPPER ID" is an item specialized in Touch ID.

　The easiest thing to do is to breathe on your fingertips many times to make up for water.I tried it several times, but I have confirmed that the probability of authentication has increased rather than doing anything (but not absolute).

　Regardless of the season, if the authentication is difficult to pass, make sure that the sensor part is not dirty, whether the sensor part is firmly pressed, or if it is applied at the correct angle.In the electrostatic capacity system, it is not possible to recognize it if it is wet in water, so I would like to check if you are not sweating.

　It's easy to forget because it's too close, but smartphones are precision equipment.Among them, the fingerprint authentication sensor that can read the slight irregularities of the fingerprints can be said to be a precision device that uses advanced technology.

　If the reaction becomes slow, why not try the way you can do it before you get angry at your smartphone?In some cases, a by -product of the health of the hand skin may be obtained.

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