How Do Screen Protectors Protect A Phone’s Screen?

A screen protector shields a smartphone’s screen from scratches and cuts, but the general public perception about its usefulness as an overall screen protector may be overestimated.

I remember when I bought my first smartphone, I was mighty concerned that its sleek, smooth screen mustn’t get any scratches on the surface.

“Get a screen protector,” advised the salesman at the phone store. “It will save your phone from all worldly bruises and injuries.”

He was, of course, referring to those little scratches that mess up the appearance and sometimes also the sensitivity of an electronic device’s screen.

Although many people buy screen protectors for their smartphones, at that time, I didn’t understand how exactly they protect the phone screen? After all, a screen protector is just a thin, transparent film of plastic (or so it seemed to me) – how can it possibly protect the screen from all kinds of physical damage? And if it could, then how could it be so unbelievably cheap!

As it turns out, a screen protector is not all what people perceive it to be.

What is a screen protector?

A screen protector is exactly what its name signifies – it’s a thin sheet of material that’s attached to the screen of an electronic device to protect the latter’s surface from physical damage, like scratches. Also known as a screen guard, a screen protector is usually made of laminated tempered glass (which is quite similar to the host device’s screen) or plastics such as polyethylene terephthalate (PET) or thermoplastic polyurethane (TPU).

The man replacing the broken tempered glass screen protector for smartphone( Nor Gal)s

Screen protectors – caretakers of modern electronic devices’ screens. (Photo Credit : Nor Gal/Shutterstock)

A plastic screen protector is cheaper, thinner than glass and is more flexible. A glass protector, however, feels more like the host device’s original screen and is better at resisting scratches on the surface.

One would think that a screen protector has some nifty features hidden inside that protects a screen from scratches, but that couldn’t be further from the truth.

How does a screen protector protect a device’s screen?

A screen guard protects a screen simply by taking all those scratches and physical damage to itself, thereby protecting the screen that lives beneath it.

Woman is sitting and holding a broken smart phone with a cracked screen(sawaddeebenz)S

Urghh, isn’t it the worst when that happens? (Photo Credit : sawaddeebenz/Shutterstock)

When an ‘unprotected’ phone falls on the ground or gets scratched, all that damage is borne directly by the phone screen. Now, if the phone screen is made of Gorilla glass, and is particularly resistant to physical punishment, then it might still be alright (following a nasty drop).

But any electronic device without a particularly strong screen surface will either crack or atleast sustain a big, ugly scratch if it doesn’t have a screen protector.

This is exactly where a screen protector steps into the picture.

It’s generally more fragile than the screen it protects, which means that should a nasty fall occur, the protector will absorb most of the energy from the impact and break, leaving the screen unscathed (in theory, atleast).

The man replacing the broken tempered glass screen protector for smartphone(Nor Gal)S

A broken screen protector. (Photo Credit : Nor Gal/Shutterstock)

A particularly scratched phone screen not only looks hideous, but it may adversely impact the screen’s touch sensitivity. This is why screen protectors are commonly used on smartphones, tablets and even laptops.

But it’s important to remember that a screen protector will not protect your phone screen from all (physical) evils.

Screen protectors and their hype

Although it’s true that screen protectors do shield a phone’s screen by primarily resisting scratches on the surface, it’s a huge misconception that screen protectors are the ultimate solution to all kinds of screen damage.

If you drop your phone (which has a screen protector), then sure, it might prevent the screen from scratching or breaking, but a lot of it depends on the kind of screen protector you use.

For example, some models only protect the upper layer of the phone screen, i.e., the part which you see and interact with.

But if your phone falls on the ground at an angle and lands on one of its corners, then that kind of screen protector won’t help much. In fact, it may not help at all. You may have heard of many cases where people have had their phone screens broken despite having a screen protector on.

What’s the takeaway from all this?

Don’t expect a screen protector to protect your device’s screen from every kind of physical damage.

What’s a better alternative for screen protectors?

A phone case offers much better overall protection to a smartphone than a screen protector. This is because a case covers the edges, corners and back of a phone and therefore efficiently absorbs impacts in those areas.

Multicolored plastic back covers for mobile phones(Marko Poplasen)S

Consider getting a phone case for overall protection of your phone. (Photo Credit : Marko Poplasen/Shutterstock)

Some people put both things on their smartphones – a screen protector and a phone case – to maximize protection against physical damages.

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All in all, a screen protector is a good add-on tool if you want to protect your screen from scratches and minor damages, but don’t expect it to be a one-stop solution for all types of physical damage to your phone.

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About the Author

Ashish is a Science graduate (Bachelor of Science) from Punjabi University (India). He spends a lot of time watching movies, and an awful lot more time discussing them. He likes Harry Potter and the Avengers, and obsesses over how thoroughly Science dictates every aspect of life… in this universe, at least.

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