In modern society, more and more people are beginning to pay attention to their privacy. When looking at mobile phones in public places, they don't want to be seen by people around them, so many people buy a peeping film and paste it on the screen, so do you know what the principle of the anti-peeping film is? Today, the little fish will talk to you about it.
The core principle of the anti-peep film is the ultra-fine blind (Microlourver) optical technology, which can be imagined to reduce the blind to tens of thousands of times, that is to say, the stripe spacing on the mobile phone's anti-peeping film can be seen clearly under the microscope of 50-100 times.
Speaking of blinds, in fact, it still originated in China. In ancient Chinese architecture, there are straight windows, which have been used in various dynasties from the Warring States to the Han Dynasty. Vertical strips are called straight windows, and horizontal strips are called reclining windows. The sleeping window is a primitive style of the blind, and it can also be said that it is the original state of the blind. But the modern shutter was invented by the Americans, named John Hampson, and patented it on August 21, 1841.
Straight ledge windows
The principle of the blinds is to block the outside world with the concave and convex direction of the leaves. At the same time, blocking the outside world from top to bottom at night, if the convex face of the blade is indoors, the shadow will not be reflected outdoors, and through the rotation of the blade and the concave and convex surface, visually block the line of sight of the "viewer".
Then the anti-peeping film is the same reason, using the principle of blinds, the blinds as a "peek-proof structural layer" placed in the screen layer, through the light angle control of the screen of the wide viewing angle into a narrow viewing angle, through the side-by-side arrangement of the grating structure (blinds) to achieve, so that at a certain angle the light can not pass through the screen reflection back to the screen state, so as to achieve the role of the anti-peeping screen, reduce the display angle of the screen, simply speaking, people around you will not be able to see your screen content, the name of anti-peeping comes from this.
Disadvantages of anti-peeping membranes
The anti-peeping film can prevent people around from peeking or unconsciously seeing their screens, but it also has certain defects.
1. The anti-peeping film can prevent others and themselves. Due to the principle and technology of its film, after the sticking, the screen will be dimmed, and the blinds will have a shielding line even if they are opened, so compared with the mobile phone with the ordinary tempered film, the brightness difference is very obvious, and the power consumption of the mobile phone will be significantly increased, which is a very important defect.
2. Some of the anti-peeping film anti-left and right do not prevent up and down skills. The anti-peeping film is divided into two-sided anti-peeping and four-sided anti-peeping, this technology has been realized, and the cost has been reduced to a state of random entry.
3. The anti-peeping film was originally a foreign patented technology, and was later cracked and produced by domestic manufacturers, but the technology has not yet reached the level of foreign countries, and it needs to be continued to be improved.
Rumors of a voyeuristic membrane?
In view of the fact that the anti-peeping film has the situation that the screen is dimmed, the brightness of the mobile phone is increased, and there is often such a saying on the Internet, that is, "the use of the anti-peeping film will make the eyes myopic and harmful to the eyes." Is this true?
According to the interpretation of relevant experts and doctors, there is no accurate correlation between the use of anti-peeping membranes and myopia for the time being. The cause of myopia is more of a long-term use of electronic products. Therefore, if you want your child not to be short-sighted, try to make him look less at the electronic screen.
Content source: Zhihu-X-station, Baidu Encyclopedia
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