The day of the presentation of Xiaomi Mi 11 we focused a lot on the aesthetic aspect. The device was greatly appreciated even though it appears, from China, that users expected the Pro model more than him. Poco bad: in a month or so we should see it debut in the mother country with all the news it will bring. However, we must not forget that these devices have some very special distinctive features (we hope that the Pro will have them too). One of these is the ability to measure heart rate via "built-in heart rate monitor". Let's see how it works together.
Here is how Xiaomi Mi 11 manages to measure heartbeats through the fingerprint scanner: it is not a new technology, but it is very interesting on a smartphone
Despite what it may seem, the technology in question on Xiaomi Mi 11 it's not that revolutionary. In fact, it is a simple sensor mounted below the display. Despite this, we are of the opinion that when mounted on a smartphone it makes a difference. There is also to say that there is no heart rate monitor inside the device and under the display, but only a sensor that mimics this function. The company has however communiquehow she managed to insert this useful feature on the top of the range device.
According to official data, the heart rate measurement function is intelligently integrated into the fingerprint scanner below the screen. This without additional equipment and without increasing the thickness of the body. The principle of technology in Xiaomi Mi 11 is as follows: a AMOLED display is used as a light source it's a optical fingerprint sensor acts as an information receiver. When the heart rate function is on, the light emitted from the screen hits your finger and the optical fingerprint sensor detects changes in light intensity. From inside the device, therefore, a green light is emitted (easily reflecting by the human body) which monitors heartbeats.
In terms of accuracy, tests carried out by the SGS laboratory have shown that Compared to professional pulse oximeters, the difference with Xiaomi Mi 11 is about 2.11 beats per minute. In the case of most smartbans and smartwatches, this difference is approximately 3 beats per minute.
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