Mobile phones disguised as normal meal cards worry parents: if you remove the polarizing film on the screen, the screen will appear white to the naked eye

News on April 9th. Today, smartphones are very easy to get addicted to, especially for students. Parents and teachers are also trying their best to control them, such as confiscating mobile phones and so on.

However, an "ultimate" solution has appeared on the market recently. Some merchants have modified mobile phones into rice cards and stuffed mobile phone parts into rice card-shaped molds to avoid inspection.

In addition to the camouflage of the shape, the merchant also tore off the polarizing film on the screen. When viewed with the naked eye, there is only a white light, but it can be displayed after wearing special polarized glasses. out of the screen.

When the backlight is turned on after the display is powered on, the light (electromagnetic wave) emitted by the LCD screen is a forward propagating transverse wave and a vibration perpendicular to the forward direction (up, down, left, right), so it is called "polarized light" ".

The human eye cannot recognize this "polarized light", and all it sees is a white picture.

Polarizing film is a dichroic transparent film on the surface of the LCD screen, which can "convert" polarized light that cannot be recognized by the human eye into identifiable Color, so it creates such a "magical" effect.

Many netizens expressed concern that the rise of such mobile phones would seriously affect students' study and life.

In addition, wearing polarized glasses for a long time will also damage the glasses, which will have a negative impact on learning and physical health.

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