Xiaomi Mi 11 was launched as the first smartphone to measure heart rate from the screen. Laboratory tests revealed that the device measures heart rate more accurately than smart watches and wristbands.

Introduced at the end of last month, the Xiaomi Mi 11 was the world’s first smartphone that could measure heart rate using a fingerprint scanner embedded in the screen. The accuracy of the measurement method in question was revealed by laboratory tests.

It is stated that Xiaomi managed to implement this feature without adding additional hardware or increasing its thickness to the device. While the AMOLED screen is used as a light source, the optical fingerprint scanner acts as a data collector.

How is the measurement done?
When the heart rate measurement function is started, the green light emitted from the screen touches the finger and the optical fingerprint sensor detects changes in light intensity. According to Xiaomi representatives, the amount of light emitted by the screen is sufficient to measure the pulse. In addition, its accuracy rate is quite high.

The tests carried out by the SGS lab revealed that the difference between the results of professional pulse oximeters and the Xiaomi Mi 11 is 2.11 bpm (beats). However, let us remind you that the deviation rate in many smart watches and wristbands on the market is approximately 3 bpm.

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