Why don’t Nintendo and Samsung let people tear off the “factory screen film”? | TechNews

Nintendo’s new Switch OLED version is on the market. Many foreign media reviews have mentioned that the OLED screen is improved compared to the previous generation, mainly due to the larger screen and higher contrast. Due to the characteristics of OLED, the black area does not emit light, which improves the battery life of the whole machine.

In short, the screen gets bigger and better, which is always good for players.

In addition to the evaluation, the new Switch OLED screen has also become a hot topic of discussion due to another matter. Switch OLED is replaced with a new material screen, and the surface is covered with a layer of glass, so Nintendo puts an “anti-scattering adhesive film” on the surface of this glass. It sounds very powerful, but it is actually commonly known as “explosion-proof film.” , The role is to avoid the scattered fragments of the surface glass from stabbing consumers.

▲ Similar to this effect.

Nintendo revealed this film in advance, and reminded players that “people who love to tear machine film” do not tear off this film, and can stick another film on this film if necessary. The Verge’s Switch OLED review article mentioned it, but the author of the article, Andrew Webster, admitted that he did not notice the existence of the film when using it. However, for protection, players are not recommended to tear off the explosion-proof membrane with itchy hands.

Don’t tear off these films easily

This is not the first time that manufacturers have urged users not to tear off the factory film.

At the beginning of 2019, Samsung released the Galaxy S10 series of mobile phones, which use ultrasonic fingerprint recognition. Generally, the tempered film is thick, which may cause the fingerprint to be unlocked and cannot be used normally. Therefore, Samsung has carefully attached the original protective film to each new phone, although it is a plastic film. But it is better than no film.

The bare metal party pursuing the feel can tear off the film directly, which will not affect normal use, but the film party needs to think twice. If you want to change to a tempered film with a better feel, you have to consider thinner products, and the cost of accessories will increase. In the same year, the Samsung Galaxy Fold series was also overwhelmed by a small film. In February, Samsung announced the Galaxy Fold foldable phone. In order to fold, the inner screen is a flexible screen. After many media got the real machine in April, the first thing they got started was to habitually tear off the film, but they didn’t expect the whole screen to be scrapped.

It can be seen from the Twitter tweets of foreign media that most of them mentioned that tearing the film is difficult, and it takes a lot of effort to tear the film off. That is because the film is a PI film (polyimide film), which is one of the display screen components. Protect the fragile OLED panel. After being torn off, it may cause oxidation, etc., which may damage the screen.

(Source:MKBHD)

After the accident, Samsung urgently improved the manufacturing process by embedding PI film in the inner layer of the frame, and added a “protective cap” at the head and tail of the hinge to improve dust resistance. Finally, the package reminded users not to tear the film.

The first two kinds of outer films are considered as protective films created to cope with special circumstances. However, there is a film, although it is the top surface of the screen, but it is not for protecting the screen, but for visualization. It is the polarizer of the liquid crystal screen. Also called polarizing film.

The LCD screen relies on the backlight layer to emit light. After passing through the liquid crystal layer, color filter film, and polarizing layer, the image that the user sees is finally displayed. Without the polarizing film to filter the light, only the white light of the backlight layer is seen. In the early years, there were TVs or display screen devices, which reminded users not to tear off the surface film in the prominent position of the machine. However, most manufacturers later embedded the polarizing film into the frame, and they are no longer afraid of the user’s habit of tearing the film to produce after-sales service. .

It can be seen that you need to be careful when tearing the film. However, most new mobile phones now come with a plastic film that has a protective effect to prevent damage to the screen due to collisions and small particles in the package. If there is no special label, the film can be torn. After that, you can use it in bare metal or re-paste the film, whichever you choose.

Membrane types and uses

Some time ago, the foreign media gsmarena launched a poll to investigate whether users helped to stick the film or cover the mobile phone. The results showed that nearly half of the users would stick the glass film, and 13.79% of the users used the mobile phone to leave the factory.

Every time I buy a new machine, I always buy a new machine before the machine arrives, the accessories will come first, and it must also include a protective film. As for what kind of film, different devices should be purchased for different devices. The following is a brief introduction to the mainstream protective films on the market. Why is there such a thing? What’s the effect of many kinds.

According to different materials, it can be roughly divided into two types: glass and plastic. There are many mainstream protective films derived from tempered film, paper-like film, hydraulic film, and privacy film. Except for the last one, the other types of privacy film have been used in different equipment at different periods. , Let’s talk about the author’s experience.

Tempered film

Tempered film, simply speaking, glass through the tempering process, strengthen the surface compactness, have higher strength and drop resistance. Like most mobile phones, it is made of glass, so the tempered film feels closest to the original mobile phone panel. Points to consider when choosing a protective film: light transmittance, hardness, thickness, tempered film is better than plastic film.

The first is the light transmittance. The light transmittance of the tempered film can basically reach 90%. The higher the light transmittance, the higher the screen look and feel. The manufacturer will not write the light transmittance directly on the promotional page, but you can ask the customer service for the exact number. .

Next is the hardness. When shopping online, I often see “9H” in the large letters of the product introduction. Smart readers may have thought that 9H refers to the hardness of the pencil. Although 9H is a high grade in the pencil core, the pencil is made of graphite. However, graphite can only get 1~1.5 grades on the Mohs hardness scale used to measure the hardness of minerals in the international standard. Tempered glass is close to 6, and of course it will not be scratched by 9H pencils.

(Source:USGS)

However, when the tempered film faces the more common sand and stone in life, that is, silicon dioxide crystals (Mohs hardness of 7), the protection strength is still a little weak, so it will inevitably produce scratches when bumped. Tempered glass, like many other things, is easy to make thick and hard to make thin. As mentioned earlier, the thickness of the film will affect the accuracy of fingerprint recognition, hand feel, and light transmittance. In theory, the thinner the film, the better, the more difficult the process, and the cost will naturally rise.

Basically, the surface of the toughened film on the market will have a PET substrate, similar to the anti-scattering film on the surface of the Nintendo Switch OLED, to prevent the fragments from splashing after the glass is broken.

Paper-like film

This is a functional film that has only emerged in recent years. Most of it is made of PET, with frosted particles added to the surface to create a paper-like touch. It is usually used in tablet devices. The advantages and disadvantages are very obvious. Although the flat screen is not as slippery as the paper touch, and consumers can easily control the writing and drawing power, the disadvantage is that the frosted particles will affect the light transmittance and fineness of the picture quality, and affect the screen look and feel; also Will wear out the stylus nib.

If you often use a tablet as a notebook or drawing board, you can consider sticking a paper film on the device, which is very different in efficiency. Especially newbies who are just learning to paint, the ability to control the brush strokes is not so strong, and the paper-like touch can get started faster.

Hydraulic film

This name sounds very advanced, but it is actually a PET plastic film. The protective film was born in the NOKIA era. Because of its softness, it is easy to fit curved screens, and its strength and light transmittance are slightly inferior to tempered films.

Privacy film

Same as the paper film, the privacy film is also a functional film. The principle is to add a very fine louvered optical fence on the surface of the PET substrate. Low light will be blocked. This is the principle of the privacy film, and it is the same principle for many ATM screens. Unless there is a real need for privacy protection, it is not recommended.

Sapphire film

It was born based on the ultimate pursuit of anti-scoring performance. It is made of sapphire material with a Mohs hardness of 9, which is higher than most materials encountered in daily life and has better protection. However, the Mohs hardness is even higher than that of the original screen glass, so when the sapphire film is broken, it may scratch the screen instead.

Filming is good business

People have always been controversial about whether to stick the film. Some people think that the film affects the hand feel, and some people think that it is not safe if the film is not applied. Both views are reasonable, but the protective film can be regarded as a “regret medicine” for users. The film is spent, broken, or cracked. The cost is low and it is not distressed. Replace it. However, when the same thing happens on the screen, you will feel distressed about your phone and wallet, and you may also regret that you didn’t stick the film on your phone.

The screen protection film was born with the birth of the screen. As long as the screen is alive, the film business will not disappear.

(This article is written by Ai Faner Authorized to reprint; source of the first image:Nintendo

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