Does the touch screen require a screen protector?

Smartphones and tablets have become the most popular electronic products in our daily lives. Touch screens are an important part of mobile phones and tablets. Users are naturally caring for them. Almost everyone will apply their own mobile phones. In the daily life, it is inevitable that the screen will be damaged. However, some people say that mobile phones and tablets do not need to be filmed because of good quality products. The screen has been processed and the pressure resistance is high. If the products are not good, they do not need to be filmed. If they are broken, they will be replaced. So, does the screen need a film?

Touch screen scratch resistance

Regarding the touch screen, the material is a piece of glass, but the glass of different materials will have different hardness, and the scratch resistance has a certain difference. German mineralogist Frederich Mohs divides mineral hardness into ten grades, from 1 to 10, graphite, gypsum, calcite, fluorite, apatite, feldspar, quartz, topaz, corundum, diamond. Among them, the lowest hardness is graphite, and the highest hardness is diamond. The main component of pure glass is silica, which is quartz, and its hardness is 7. However, the touch screen should take into account various requirements such as volume, weight, touch and light transmission, so its hardness is about 6-7.

In daily life, the finger that most often touches the screen has a nail hardness of 3, which does not affect the screen at all. Many metals have a hardness of 5.5, so the glass that is most likely to rub against the screen in the package has little effect on the screen.

Type of touch screen glass

When we choose tablets and mobile phones, the screen is often an important choice. In addition to the resolution, density, and color of the screen, the screen protector glass is also very important. The types of screen glass that we can access are also diverse. Taking the most popular capacitive touch screen as an example, the structure is glass, conductor layer, glass, and the glass layer has a protective effect on the conductor layer and the inductor.

1, plexiglass

Plexiglass, commonly known as acrylic, is cheaper than orthodox glass and has a much lower wear resistance. The hardness of plexiglass is generally 3-4, and the hardness is 5-6 even after surface hardening. When in contact with metal, it is naturally weak, so the screen is more likely to be scratched. The advantage is that the toughness is better than the glass material and is not easy to be broken.

2, aluminosilicate glass

The ordinary touch screen glass has a hardness of 6, and in order to improve the scratch resistance of the screen, aluminosilicate glass is used in touch screen technology. This touch glass material is more difficult to process and more expensive, with a hardness of 6.5-7.5, higher than plexiglass and ordinary touch screen glass. Aluminosilicate glasses generally do not scratch, but have the disadvantage of being brittle and heavier than plexiglass.

3, sapphire glass

Sapphire glass, which is second only to diamond in hardness, is more wear-resistant and scratch-resistant. This material is usually used on the glass of the camera and will be used on smartphones in the future. The cost of sapphire glass will be 6 to 7 times that of conventional glass, but the hardness is 9, the hardness is very high, and the scratch resistance is better. It is reported that this glass touch also has sensitive touch and good display effect.

Protective film selection

There are many types of touch screen protective films on the market, such as high permeability film, frosted film, diamond film, tempered film, etc., and the price ranges from a few to a hundred yuan. Investigate the material of the protective film, and also have different types such as PVC, PET, AR, and PE. With such a big difference, the scratch resistance of the protective film will of course be different.

1, PET protective film

This is the most common type of protective sticker on the market. The PET material protective film has a high hardness and a high scratch resistance. The protective film of PET relies on electrostatic adsorption, which is relatively easy to foam and fall off, but can be reused even if it is washed off in clean water.

2, tempered glass protective film

Tempered glass film is a new type of screen protection material. According to reports, this protective film has high strength protection and a thickness of only 0.4 mm. The light transmittance is up to 98%, and its main functions are explosion-proof, anti-blue light, anti-myopia and so on. Prevents the screen from being damaged by external forces and increases shock absorption, which is five times higher than the standard of PET film.

Regarding the selection of the protective film, in addition to the material, it is often seen from the light transmittance and the abrasion resistance. However, the transmittance of most inferior film on the market is generally below 80%, which seriously affects the screen display effect. When it comes to the wear resistance H, the higher the hardening treatment, the more likely the rainbow pattern appears on the screen. influential. There is a phenomenon that everyone feels the same. When we tear open the protective film, we often feel that the screen is clearer and brighter.

Whether you need a film

When the hardness of the touch screen is greater than the hardness of the protective film, is it a superfluous film? There is also a saying that the silica in the dust is enough to cause scratches on the cell phone glass, so the screen is inevitably hurt. But how big is the chance of being scratched like this? Nowadays, the replacement speed of electronic products is very fast. Most people's mobile phones will be replaced in 1-2 years. If the screen is still new when it is replaced, what is the point?