What is the working principle of computer peep screen?

The working principle of peep screen is similar to shutter, which is a style of window and originated from China. In ancient buildings in China, there were straight lattice windows, which were used in all dynasties from the Warring States to the Han Dynasty. The vertical bar is called straight lattice window, and the horizontal bar is called lying lattice window. Transverse lattice window is an original style of shutter, which can also be said to be the original state of shutter.

However, the modern shutter was invented by an American named John Hampson, and was patented on August 2 184 1. Shutters are generally wide and are generally used for indoor and outdoor shading and ventilation. More and more people agree that the curtain wall is also evolved from the shutter.

Shutter curtain wall has many functions and advantages, and it is very beautiful, and is generally used in high-rise buildings. Shutters, windows with shutters. Different from venetian blinds. Venetian blinds is similar to a curtain, with small leaves that can be folded, which is common in our TV or daily life. The principle of blinds is.

The concave-convex direction of the blade blocks the external view, and also blocks the external view from top to bottom. At night, if the convex surface of the blade faces indoors, the shadow will not be reflected to the outside, and the sight of the "spectator" is visually blocked by the rotation and concave-convex surface of the blade. The core principle of peep-proof film is the optical technology of ultra-fine shutter.

It is conceivable that the shutter is reduced to tens of thousands of times, that is to say, the stripe spacing on the mobile phone's peep-proof film can only be seen clearly under a microscope of 50- 100 times. So is the anti-peeping film. Using the shutter principle, the shutter is placed on the screen layer as an "anti-peeping structural layer".

By controlling the angle of light, the wide viewing angle of the screen is changed into a narrow viewing angle, which is realized by the grating structure arranged in parallel, so that the light cannot pass through the screen and reflect back to the screen state at a certain angle, thus achieving the function of preventing the screen from being peeped and reducing the display angle of the screen. Simply put, people around you will not be able to see your screen clearly.

The name of anti-voyeurism comes from this. Originally, this technology was patented by American companies, but they forgot that there is a magical place called "Huaqiang North" in Shenzhen, China, and the anti-peeping film was mass-produced in a few minutes. Today it is so cheap.