People who bought a mobile phone like to study the parameters of the new mobile phone, although they have seen it before buying it.

Most of the above parameters can be understood, but some are half-baked. For example, the old monster sees the word "Hall sensor" is a bit aggressive, what is this ghost? What is the use?

What is a Hall sensor?

The Hall sensor is a magnetic field sensor fabricated according to the Hall effect. The Hall effect is a kind of magnetoelectric effect. This phenomenon was discovered when the cattle named Hall were studying the conductive mechanism of metal in 1879.

Well, as an non-science student, not a schoolmaster, please allow me to simply interpret the Hall effect as the interaction of "magnetic field" and "electricity."

Is the Hall sensor useful on mobile phones?

It doesn't matter if we don't understand the principle. We just need to know that it works. Just like Qian Zhongshu said: "The egg is delicious, but there is no need to know the old hen who lays the egg."

Its function is the Hall switch, which can make our mobile phone case smart. The specific effect is to open the bright screen and close the black screen.

In fact, this is not a new thing, because the clamshell machine used this feature frequently, and of course it is also available on tablets.

In short, if the mobile phone has a Hall sensor, as long as a magnet is built in the holster, the above functions can be achieved, and most of the smart machines currently have Hall sensors.

This sensor is available for Mao, but the official does not publicize?

There are a lot of reasons. First of all, it only needs to tell the user that there is a "smart sleep" function. It is not necessary to introduce it in a special and professional way. It will be confusing to the user, and it is not as important as the CPU and camera. So I am not willing to promote this.

In addition, is it worried that the media/netizens are worried about radiation, harmful to health, and so on?

In fact, the main role of the Hall sensor (also called the magnetic field sensor) is to detect the geomagnetic field and realize the compass function. The Hall switch is only a supplementary function.