Wednesday, July 20, 2016

Here's How it Works Sensor "fingerprint" on the "Smartphone"

Some movie-themed action often recording the scene of one character is opening some kind of box or secret weapons storage space. Not by entering the code number, he only needs to attach the fingers and the door opened.

In the real world, technology fingerprint scanner or fingerprint recognition is already plural is used as a "bastion" of important data. The security system is not easily broken, because no human being has the same fingerprint pattern.

Naturally, many smartphones begin to apply as a fingerprint feature access code enabled phones. In contrast to the number system or pattern, one can not imitate fingerprints.

In fact, long before the crowded embedded on smart phones, fingerprint technology was first developed for the benefit of the Federal Bureau of Investigation (FBI) in the United States.

In 1969 the FBI in cooperation with the National Institute of Standards and Technology (NIST) makes fingerprint-based identification system. Six years later, the first protitipe also exhibited the institution. Well, if on a smartphone, what the applications of this technology?

reading patterns

In a simple fingerprint works with "record" a person's fingerprint, and then save the typical pattern. Identification is done by matching the data that has been stored. If found equal, the access opens automatically.

The question is, how a scanner "reads" the fingerprint pattern?

Fingerprints consist of many prominent lines that tend to be coiled. This can be seen clearly, one of them when we made fingerprints using ink for official papers.
From there it can be seen, the fingerprints have many intricate patterns. If these patterns are used, the fingerprint identification process would take too long. Conversely, if the pattern is taken too simple, it is likely less accurate scanning.

As a solution, a scanner only capture and store three types of patterns on the stroke fingerprints. Pattern taken from part on the results of fingerprint ink look thicker.

The pattern of them, the end of the line (ridge ending), branching lines (bifurcation), and short lines resembling dots (short ridge). Three detail on these fingerprints never encountered the same in humans.

To scan, the machine requires a sensor. Sensor types also vary. Optical or optical fingerprint imaging, for example, utilize light when recording the fingerprint pattern. It works similar to a copy machine.
Finger is placed on a scanner-usually made of glass. Then, from under the scanner, illuminating the light-emitting surface of a fingertip. Reflected light then arrested the receiver so that fingerprints was obtained.

Unfortunately, this technique has several disadvantages. Fingerprint pattern obtained is highly dependent on the condition of the soles of the finger. If your fingers are dirty or the skin is being peeled off, for example, the scanner may fail to recognize the fingerprint.

As a result of these shortcomings, preferring smart phones using ultrasonic sensors, or capacitance (capacitive). Ultrasonic sensors, as the name implies, utilizes wave when scanning fingerprints as on ultrasonography (USG) are often used for medical purposes.

The results of fingerprint scanning with the sensor already berkualitis three-dimensional (3D) so that the lower the possibility of counterfeiting. Identification using ultrasonic sensors also do not depend on the quality of skin of the finger.

Another story if using capacitance sensors. This system uses a kind of capacitor electronic device to scan fingerprints. Capacitors store electrical charges connected with conductive disc on the smartphone display so that it can be used to track detailed fingerprints.

The electrical charge on the capacitor will slightly change as part of a line stand in fingerprint placed on conductive disc. Meanwhile, inter-stream line stand almost no effect on the capacitor. From here, the fingerprint image was obtained.

Based on the above, the fingerprint identification process does look more complicated than the code number or pattern. But, the system is very easy for users of smartphones. No need to memorize the code, users simply put a finger and open access to any smartphone.

Naturally, the demand for smart phones equipped with the feature rampant. The mobile phone manufacturers are increasingly eager paste fingerprint technology in their products.

Electronics market research institute, HIS Technology, said that in 2015 the production of fingerprint sensors for mobile phones, tablets, and notebooks continue to increase from 316 million units in 2014 to 499 million. This number is expected to increase to 1.6 billion units in 2020.

However, at the beginning of its development, fingerprint technology applications are still dominated by upscale smartphones valuable. Now, there are already middle-class smart phone with a price of Rp 2 million co-armed same system. One example Polytron Zap 6 Power.

Not only fingerprint features. Zap 6 Power also supports 4G network and has a battery capacity of 5800 mAh. Dare to try?

No comments:

Post a Comment