Why should I add polarization to the screen of my mobile phone?

The emitted redundant irregular light is reduced,

Look at the screen without dazzling. Generally, there are only high-end mobile phones, but this kind of mobile phone will be blurred from the side. Haha, it can prevent peeping.

A polarizer is used to turn light into a wave in a certain direction, that is, polarization. Polarizers that can often be seen in daily life include 3D glasses in cinemas, polarizers used by photographers and sunglasses with polarizing function. The 3D glasses in the cinema are polarizers whose vibration transmission directions are perpendicular to each other, so that the images seen by the two eyes are slightly different, and the stereoscopic effect of viewing can be realized through brain supplement.