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Galaxy S10 has an ultrasonic fingerprint scanner. This is why you should take care


The Galaxy S10 screen fingerprint scanner may look exactly like one on OnePlus 6T, but do not be cheated. Samsung's leading Samsung Galaxy S10 and S10 Plus are the first phones to use ultrasonic ultrasonic screen fingerprint technology, which uses audio waves to read your print.

Associated with ultrasound in a doctor's office, this "3D Sound Sensor" technology works by bouncing sound waves off your skin. It will hold your details by water, lotion and grease, at night or in bright daylight. Qualcomm also claims that it is faster and much safer than the optical fingerprint detector that you have previously seen in other phones. That's because the ultrasonic reader takes a 3D insight of all hedges and valleys that form your skin, compared to a 2D image – basically a picture – that an optical reader still use light waves, not sound waves.

The argument comes between ultrasonic and optical fingerprint scanners at a time when biometric security is on the access. Screen fingerprint readers are a hot trend in phone design because they do not enter any room on the face of the phone, and there is a need for less groping than a sensor inserting on a telephone power button or a backstroke. That design clearly touches the move to a whole screen surface with barely visible bezels.


Galaxy S10's screen fingerprints reader brings the effect of a station.

Sarah Tew / CNET

"Security and biometrics have been integrating to fast-moving mobile platforms," ​​said Alex Gymnasium, senior Gymcomm mobile technology vice president in December at Qulalcomm's annual technology summit in Hawaii. "This is the future of fingerprint technology."

The ultrasonic fingerprint detector built into screen layers replaces the scanning of a magazine as the biometric sensor of choice on the Galaxy S10 and S10 Plus in particular. (The Galaxy S10E has a traditive traditive fingerprint reader on the power button.) Iris scanning has existed since the Galaxy S7, so Samsung is moving away from them as a surprise surprise. It's certain that Google flashes 3D face scan into Next version of Android, which is referred to as Q Q.

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Why is an ultrasonic Galaxy S10 fingerprint reader important?


An animated explanation of how ultrasonic fingerprint scanners work, you will also be sure to look at the video in this story. In the meantime, this is what you need to know about the ultrasonic screen fingerprint reader on the Galaxy S10 and S10 Plus.

What is a fingerprint sensor & # 39; ultrasonic & # 39 ;?

The Soundcomm Sensor 3D fingerprint detector developed by Qualcomm uses sound waves (here is the "sonic" part) to "read" your fingerprints as you unlock your phone. The trend of these days is to install this fingerprint sensor under the display so that you unlock the phone by putting your finger or thumb in the middle of the screen – it's also called a trace reader internal screen fingers – but this type of sensor could also exist on a home device button. CNET saw a prototype of this ultrasonic sensor in 2015.

In this case, the ultrasonic detector has to integrate into one of the number of layers that form your phone display. When you put your finger on the target area, you touch the glass that fits your phone, not the sensor. But your skin sends a small electrical pulse that activates the sensor and does it to do it. It's been snoozing but by touching the phone, you put it seamlessly.


The OnePlus 6T was the first phone with a US carrier to have a screen fingerprint reader (optical).

James Martin / CNET

How exactly does the ultrasonic sensor work?

When your electrical signal reaches the sensor, it emits sound waves that bounce back to your skin. The face of your skin is not always – your finger fingers are a unique pattern of hedges and valleys, which is what makes fingerprint in a useful form of identification. These ultrasonic waves bounce back to the processor, which mapped their fingerprints based on the noise sound reading of your noisy noise off your croen. Specifically, it calculates different levels of voltage based on your crews and valleys.

In a simple example, say that your ridges are 1 and the valley is 0. The ultrasonic sensor mapping that data module can form a rich 3D image of your fingerprint details. The sound waves can also detect your blood flow, and they will refrain print from a broken finger. It can not be cheated by fake fingers or synthetic skin.

Optical optical ultrasonic fingerprint reader: How is it different?

Optical fingerprint reader – like the one that is powered by Synaptics that makes those components We first saw in Vivo phones – turn light up to your finger and back down to the sensor, which interprets the reading as a 2D image. In essence, he takes a picture of his finger to decide on the pattern of ribbons and valleys. But experts say that this approach is easier for photo fusion, fingerprint transfer (for example, if someone has uploaded your print) or prosthetic fingerprints.

Qualcomm claims that its ultrasonic fingerprint sensor is powerful enough to read 4 millimeters deep when scanning its print. That's a pore level. We have not yet tried to read the Galaxy S10 fingerprint reader, so we can not say it's sure if that's OK. But it's sure everyone in the security community will prove it to the limit.


Great fun, reader capacitive fingerprints. Hello, ultrasonic.

Angela Lang / CNET

How does ultrasonic differ from a physical finger reader?

When you put your finger on a smooth reader on a back button, side or phone home, your fingerprints are captured by a capacitive fingerprint sensor. Yes, "capacitive" is the same term that applies to the touch screen of your phone, where your finger lets off with electricity for the display to a sense where you are; n just touch.

Here is the same case here. Containers through the scanner find the location of your fingerprint by measuring electrical charge and then matching the pattern of those payments to their registered fingers.


Jessica Dolcourt / CNET

What is the advantage of using this over Face ID and the features of unlocking other faces?

Apple's Face ID uses a depth map made of 30,000 lower points to map your face contours. Samsung used to use a technology that competes to scan your magazine, but it has eliminated that for the new phones. Galaxy S10 phones use a third that is being packed in Google Android, which is essentially a picture of its face. Face ID and magazine scanning are considered safe enough to use for mobile charges, but the face recognition option in Android Pie will not support mobile charges. It's there for ease, but it will not give you a strong defense.

Samsung may face difficulties in having a face-facing 3D face scanner to work in time for his Galaxy S10 launch. Samsung is also possible to tie its limit to Google anyway, in order to save money on investment that may be a few months away. It would not completely be boundaries to think that Samsung wants to save the Face ID style option for the August release of the Galaxy Note 10.

Regardless of the scheme, regardless of the incentive, the ultrasonic screen fingerprint reader will probably keep pace for several generations – especially if it proves that so fast, convenient and safe as Gymcommcomm says.

Published: December 4, 2018.
Update: February 21, 2019 at 10:01 am PT.

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