Privacy film Technical Principle

Let's start with the blinds.

Shutters are a style of window, which originated in China. In ancient Chinese buildings, there are mullioned windows, which were used in all dynasties from the Warring States to the Han Dynasty. The vertical bars are called mullions, and the horizontal bars are called horizontal windows.

However, the modern blinds were invented by Americans, named John Hampson, and obtained the patent for the invention on August 21, 1841. Blinds are generally relatively wide, and are generally used for indoor and outdoor shading and ventilation.

The shutter curtain wall that more and more people agree with also evolved from the shutter. The shutter curtain wall has many functions and advantages, and it is very beautiful. It is generally used in high-rise buildings. Louvre, a window with shutters installed. Different from venetian blinds. Venetian blinds are similar to curtains, with smaller leaves and can be folded, which are common in our TV or daily life.

The principle of blinds is to block the outside view by the concave and convex direction of the blades. While lighting, it blocks the outside vision from top to bottom. At night, if the convex surface of the blades is indoors, the shadow will not be reflected to the outdoors. The concave-convex surface visually blocks the sight of "spectators".

The core principle of the privacy film is the microlourver optical technology, which can be imagined as shrinking the blinds to tens of thousands of times, which means that the stripe spacing on the privacy film of the mobile phone should be placed under a microscope of 50-100 times. To be able to see clearly.

Then the privacy film is the same. Using the principle of blinds, the blinds are placed in the screen layer as a "secret structure layer", and the wide viewing angle of the screen is changed to a narrow viewing angle through the light angle control, and the grating structure arranged side by side ( Blinds), so the light cannot be reflected back to the screen through the screen at a certain angle, so as to achieve the effect of the privacy screen, reduce the display angle of the screen, in simple terms, people around you will not be able to see your screen clearly Content, the name of privacy protection comes from this.

Will privacy filters have side effects?

I have seen that many people have doubts about the privacy film. Does it really affect the vision? Because after the privacy film is attached, the brightness of the mobile phone screen is passively reduced, but so far I haven't seen any data to prove this statement. It is recommended to brighten the screen brightness appropriately when using the mobile phone (30% higher than the original brightness).

However, if you have serious visual impairment in your eyes, or often have uncomfortable eyes, such as dryness and fatigue, try not to use privacy filters.

How to choose privacy film?

Of course, privacy films are also divided into advantages and disadvantages. The first requirement of a good privacy film is to have a good privacy effect and a high light transmittance.

The anti-peep effect is related to the viewing angle. The smaller the viewing angle, the better the anti-peep effect. Now the new anti-peep film has a viewing angle of less than 30°, which means that the anti-peep range is expanded, which can better protect personal privacy.