Protective glass 2.5 d arc glass reviews. What is the difference in the appearance of protective glass for a smartphone? First, what's in common?
Good day! After I finally broke my old Samsung GS4Mini and started looking for a replacement, I discovered that most modern phones have 2.5D screens with rounded edges. I always try to protect my gadgets, and I planned to do the same with the chosen one. Xiaomi Redmi 4X (it just has a 2.5D screen), so after scouring the Internet, I ordered glass to protect the screen. What came out of this is what I want to tell you further.
Initially, I identified several possible types of screen protection for my R4X:
Protective film. I never liked films. Gluing them without dust getting inside is not an easy task for me. Afterwards, during the operation of the phone, they quickly became unusable from scratches and peeling corners.
Transparent over the entire area protective glass
. When using such glass on 2.5D screens, there are a couple of options:
1. Protective glass measuring a couple of millimeters from each edge smaller size screen. Then the glass is glued to the flat surface of the screen until its edges begin to bend. It looks peculiar and is not for everyone. 
(photo from the Internet)
2. Protective glass with a distance between the edge of the glass and the edge of the screen that is not as large as in the first option. At the same time, due to the curvature of the screen, there is a visible air gap between the screen and the glass. To hide this layer, they came up with a special composition “Liquid”, which fills the resulting voids and visually the layer ceases to be visible. 
And everything seems to be fine, you can buy a glass version complete with this composition and a brush for applying it in addition, you can buy the composition separately. But, unfortunately, you will have to periodically replenish the liquid in the voids, because... they're not going anywhere.
There is another type of protective glass, but it is not completely transparent, but has a frame around the edges. This is exactly what I chose. I will explain my choice below.
I ordered the glass at random, searching on Aliexpress for exactly the type that was chosen.
The seller had three frame color options, corresponding to the main screen color options - white, black and gold. Because I already ordered a phone with a black body and a black screen, I also ordered black glass. 
It's no secret that Chinese sellers love to speculate on phone colors. As a rule, black colors are always 10-20% more expensive than white or gold. Therefore, having bought more cheap phone in white or gold, if desired, you can “repaint” it black by gluing the appropriate glass and putting it in a black case.
After ordering a pair of glasses, the seller sent them the next day. 
Departure with track, the entire route was tracked. It arrived to me in the Volga region of Russia in three weeks. 
The glasses came packed in a foam box. The post office would have to try very hard to damage it. Therefore, the contents of the parcel arrived safe and sound. 
And the contents were as follows: the glass itself, 2 sets of wet and dry wipes per glass, and stickers for collecting dust. 
By the way, I never use complete napkins, because... I never manage to clean the screen with them. In case of severe contamination, I use alcohol, and then polish it with a microfiber cloth from a set of 3D glasses for TV. 
The glass is made without any defects. Everything is cut smoothly, the frame is clearly painted, the holes for the speaker, sensor and front camera in their places. 
The edges of the glass are rounded. I didn’t have a micrometer at hand, so I had to measure the thickness of the glass with a caliper and it turned out to be about 0.5 mm. 
The sticker procedure is the same as in the case of transparent glass, the only difference being that this glass has an adhesive layer applied only to the painted areas of the frame. There is no glue on the transparent surface of the glass. Hence the first possible drawback of such glasses - I came across opinions online that on some similar glasses, when glued, an air layer remains in the transparent part of the screen and when pressed, a slight click is felt, because. when pressed with a finger, it bends the protective glass, which in turn gently knocks on the screen. Some people like it, some don't. But I can’t say anything for myself, I don’t have such a click.
Another point that can be regarded as a drawback is the presence of a grid of dots on the glass, which can be seen if you look closely at the black screen turned off and shine a lamp on it in reflected light. To see these points you need to look closely, normal use they are not noticeable, and when the screen is on it is almost impossible to see them. 
The glass came apart very well. Holds securely. Two weeks active use- the flight is normal. Let's see how long it will last. No air gaps between the screen and glass are visually visible. I tried to crawl up with the corner of a sheet of paper - the corner fits in there by a fraction of a millimeter. It turns out that there is still a layer, but it’s the frame that hides it. However, it is unlikely to pick up the glass by accident, for example, with a fingernail or something else. You can catch it, but you have to try to do it on purpose.
Glass covers almost the entire surface of the screen. The distance from the edge of the glass to the edge of the screen is less than 1 mm. Just this gap is covered protective case, which I reviewed here: 
In this review I cannot ignore one more drawback, which I also came across in reviews of these types of glass online - under certain lighting (fluorescent lamps, CRT monitors etc.) multi-colored stains are visible at the points of contact between the screen and glass, which are called gasoline or oil stains. I couldn’t see anything like this in my place in any lighting, including in the light fluorescent lamps. Maybe I just didn’t find the “right” light source. But, on the other hand, why should I look for him if everyday use, in the conditions in which I am, no stains are visible. I admit that such stains can appear if you stick glass onto a screen that has not dried, for example, immediately after cleaning it with a damp cloth without removing all the liquid.
And finally, the most interesting and, in my opinion, controversial. The seller's page states that the glass has an oleophobic coating. After googling how to check, I found that you need to drop a drop on the glass and let the drop roll down it. If there is an oleophobic coating, then the drop will roll off without spreading or leaving a mark. Which is what was done. Indeed, the drop rolled down the clean glass, as if on a greasy surface, without any intention of spreading and leaving behind any droplets or traces. 
However, after using the phone with protective glass a little, it collected a large number of my fingerprints: 
Therefore, I am tormented by vague doubts about the oleophobicity of this item.
To summarize, I can say that, despite the listed shortcomings, I am satisfied with the glass. It fulfills its function. It goes well with a case with protective sides, and with another case or without it it looks good and neat. The only drawback for me is that the screen does get very dirty over time. On the other hand, I think it’s stupid to expect miracles with a super oleophobic coating for the 68 rubles/glass spent.
I'm planning to buy +30 Add to favorites I liked the review +26 +50Increasingly, glass characteristics are found in device descriptions: 2D, 2.5D or 3D. What does this mean and why is this information provided? We warn you that we're talking about not about measuring space.
2D
This type of glass is still used in new smartphone models. 2D is glass with minimally processed edges. Special attention no attention is paid to the edges, since they go deep into the body. Accordingly, there is no need to carefully grind the glass. The client does not see the edges and does not touch them.
2.5D
2.5D is an intermediate version of glass between 2D and 3D. This type of glass is used to cover conventional flat panel display screens. The main difference between this glass and 2D glass is its well-processed and rounded edges. 2.5D is used not only for safety - to avoid cutting your hands, but also as a design element. This glass makes the display visually more voluminous, and the outlines of the body are rounded. Due to these visual effects The smartphone looks smaller and more delicate. The first prototype of 2.5D glass was used by Nokia in the 6700 Slide phone.
Apple was the first to use 2.5D glass for smartphones. The iPhone 6 received a screen with smooth edges. However, the characteristics of the devices never mentioned 2.5D glass; it was called Zopo Touch.
This type of glass also has its drawbacks. If you decide to stick a protective film, there is a high probability that air bubbles will form along the edges.
3D
Type 3D is curved glass. We're not just talking about the edges; the glass can be curved in the center or on the sides. For example, like the well-known LG G Flex and Samsung Galaxy Edge.
These smartphones have curved shapes thanks to flexible displays and 3D glass that can smoothly follow the shape of the body.
It is worth noting that this characteristic is not included in the main characteristics; it is indicated as additional. The shape of the glass does not actually affect its strength, so it would be wrong to say that 3D is stronger than 2.5D. Do not confuse the numbers 2D, 2.5D, 3D with the strength of tempered protective glass; it is denoted by the letter H (Hardness).
If you need to buy display module, pay attention to this additional characteristics. Often, unscrupulous manufacturers use 2D glass instead of 2.5D to make a copy in order to reduce the cost of the spare part. High-quality copies always use the same type of glass as the original. Before purchasing, always check the type of glass, whether it is a copy or an original.
The new type of glass for 2.5D screens sounds more like stereotypical marketing jargon... The first thing that comes to mind is something between the second and third generations? Anyway, this name is actually based on a new design, and it's not just a term used in hopes of selling you half-useless screen protectors.
The term 2.5D refers to the small curve on the edge of the display glass, also known as a beveled edge. Along with this, there is no official name for the technology, in Lately this name is widely used in describing the design of displays. On most phones, users may not even notice the difference, but on gadgets where the glass protrudes slightly beyond the body, owners will certainly appreciate the smoother edges.
In fact already long time A large number of smartphones have a curved edge, so developers have made attempts to make their phones stand out from the usual designs, and recently in 2.5D marketing the term has become much more prominent. You can also easily see on modern phones curved glass, for example on, and now on.
So straight or curved?
It would probably be more accurate to say straight, since the name refers to the rounded edges of flat 2D screens. If it's not entirely clear to you, the image below will demonstrate it a little better than we can express in words.
This effect can be different, more or less sharp, depending on what kind of curved edge is required. Even a very small curve on the edge of the glass gives a smooth feel, while a larger rounded edge can look more stylish.
But let's continue, the actual bending of the display leads to a more noticeable 3D effect. This type of screen can be seen on phones, or, but this type Curved displays require bending of the electronics as well, but 2.5D glass does not. However, this does not mean that these types of screens are no different from regular displays, and it should also be noted that phones are now equipped with more prominent curved displays.
How it's done?
Although a lot of fuss has been made about 2.5D glass, there is nothing extraordinary about the way it is designed and built. In any case, since in reality the electronic elements of the display are not curved, unlike curved displays, 2.5D glass is made from the same flat glass matrix. There are only a few differences when it comes to shaping the glass to the desired dimensions.
2.5D glass is a little more expensive to produce, but gives the device a more premium look.
Also, 2.5D displays also benefit from hardening and special technology to increase strength during production, the same as the popular Corning Gorilla Glass. Pieces of glass for individual smartphones certain size cut from a larger mother sheet, then go to an additional processing stage aimed at trimming and smoothing the edges of the glass. This production A little more expensive, but gives the device a more premium look.
Next, the finished glass undergoes a tempering process; it is heated in a solution of molten salts at very high temperatures. high temperatures, and then undergoes rapid cooling, resulting in a very durable product.
For common understanding, Fully curved displays like the G Flex 2 smartphones or along the curve require a modified transistor circuit board and rounded light elements of the screen matrix, such as OLED (organic light-emitting diodes) or LCD (LCD pixels). Twisted electronic circuits, are even more complex and expensive to produce than curved glass components.
What are the benefits?
If we talk about the advantages, then 2.5D glass has only purely ergonomic and aesthetic ones. The technology is especially important on devices with touch screens, which must ensure that the entire surface where consumers are going to touch and run their fingers is smooth. You don't want to cut your finger on a sharp glass corner!
Apparently 2.5D screens have become a marketing term, trying to make phones stand out with their aesthetic design.
2.5D glass on smartphones with rounded edges looks much better than raising the edge above the display, and creates the unique impression that the glass fits completely into the body of the phone.
If we talk about durability and scratch resistance, then in fact these properties are based on production technology, and have nothing to do with the name 2.5D.
2.5D screen protection
Our congratulations, you have a modern smartphone with a 2.5D display type and you want to protect it in some way? Version protective film I hope you peel it back right away, since it practically only protects against scratches and will also come off on 2.5D screens. That's right, protective glass is perfect here, but there are some nuances here. Most manufacturers make regular glass, which only protects 90% of the touchscreen surface area. We would like to introduce you new type glass – 2.5D Curved Tempered Glass from LEWEI.
Safety glass from LEWEI offers a number of advantages over conventional safety glass. First of all: It protects 100% of the touchscreen surface. Secondly: it is almost invisible on the smartphone after sticking; other users will not even notice that you have glued glass. Third: The glass is fingerprint-resistant and easy to clean. Fourthly: an air gap is created between the protective glass and the touchscreen, which further protects the smartphone from direct falls with the display facing down. In the store you will find protective glass for any smartphone:.
It's also worth noting that a large number of phones with Gorilla Glass displays are also labeled as 2.5D, but these are two completely different terms. There is also no reason to believe that this type of display is stronger or weaker than ordinary flat glass prototypes. After all, this wording only applies to the edge of the display, which is largely the same. Manufactured 2.5D displays with a modified process can result in different levels of strength.
The only minor drawback is that users who want to additionally protect the screen with a film may have some difficulty finding a film that will clearly follow the contours of 2.5D glass. You will have to look for special films for such devices.
In general, the term 2.5D display is not completely meaningless, but it is also not a new technical success that would give an advantage over other devices. Screens with 2.5D glass may give the design a more pleasant look, but this is not the basis when choosing a device at the time of purchase.
Recently, the mysterious, at first glance, term “2.5D glass” has been increasingly used in the description of new smartphones. Let’s try to figure out what this glass technology is.
For a long time, the English abbreviation xD has been used to indicate the number of dimensions, indicating their number. 2D is a flat two-dimensional space that has width and length; in the case of 3D, thickness or depth is also added. Against this background, the term 2.5D does not look entirely clear: it would seem, how can one add another half to the two existing dimensions? But in reality everything is much simpler.
2 D-glass
Traditionally, displays mobile devices equipped protective coating made of transparent plastic. Later (with the development of touchscreens and an increase in screen area) it was replaced by strained glass, which was designed to increase the device's resistance to shocks and scratches. However, the use of new materials did not change the technology itself. As in the era of plastic dominance, the display cover was a piece of glass cut to the shape of the front panel of the smartphone. It was conditionally two-dimensional, since the insignificant thickness of the coating (up to 1 mm, against a background of 5-7 cm in width and 10-15 in length) can be neglected.
The edges of 2D glass are processed at the factory to remove any sharp edges that can cut your finger. No particular attention is paid to careful grinding of the edges, since in most cases they are recessed deep into the body or covered by a side edging. Thus, the user does not see the thickness of the glass: only the front surface of the coating is open to him.
3 D-glass
The term 3D glass (as opposed to 2.5D) was introduced even before the first devices using this technology appeared. Idea curved screen smartphone manufacturers have been on fire for a long time, but for a long time the level of technology did not make it possible to create a matrix high resolution, different from flat.
In 2013, Samsung and LG announced smartphones of the Galaxy Round and G flex series, the displays of which received curved shapes. In such screens, a glass layer covers the matrix, repeating its bend, and the third dimension (thickness or relief - whichever is more convenient) is always visible.
2,5 D-glass - the golden mean
2.5D glass, as you can easily guess from the above, is an intermediate option between 2D and 3D. This coating is used to protect conventional flat screens, but differs from 2D in its rounded edges. It allows you to give the display a three-dimensional effect, round the outlines of the body, and make it visually smaller and more refined. The main advantage of 2.5D glass is the ability to obtain a slight bend without resorting to the use of expensive 3D matrices.
One of the first modern smartphones, which received a screen with glass smoothed around the edges, became the iPhone 6. But Apple company has never used the term “2.5D glass” in relation to its products. In 2015, Zopo Touch was advertised as one of the first smartphones with 2.5D.
If you go deeper into history, you can see that curved edges were found back when touch smartphones were just gaining popularity. In 2009, the Nokia 6700 Slide had a similar coating, and in 2011 the touchscreen N9 was released. That same year, HTC introduced a device whose screen had rounded edges, but they curved upward rather than downward, forming a small depression.
In conclusion, it is worth noting that 2.5D glass technology is a successful technique that allows you to add variety to the design of mobile devices. But it is not something new and revolutionary, but merely serves as an example of how old technologies find new life.
2.5D glass is not without its drawback: when gluing a protective film or glass, it will not be possible to completely replicate the shape of the screen, and an air gap will form at the edges under the coating. However, this minus cannot be called significant: if the smartphone has tempered glass, which is also equipped with an oleophobic layer, the point of using additional protective equipment is quite questionable and will benefit people selling protective films.
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"What better smartphone or Android? - not quite the right question. Let's figure it out
A new term - 2.5D glass, regularly appears in reviews and descriptions of new products on the smartphone market. The new name hides the glass screen design technology used since 2009. A typical marketing ploy of manufacturers in conditions of fierce competition is to describe familiar and natural things in new words, passing them off as innovation. As a design factor, 2.5D glass has its own characteristics and advantages, but different from those that marketers attribute to them.
The slight rounding of the edges of the glass display panel is a difference from 2.5D glass and is not noticeable on devices where the edges of the display are limited by frames. But modern conceptual design dictates its own design rules to manufacturers: glass covers the display completely. Here you can appreciate the noble smooth curve of the edges. Illustrative examples The displays of modern smartphones and other models that focus on the aesthetic appeal of design solutions are used.
As a result, rounding the edges of flat 2D screens in the Z axis, even without reaching extreme values, gives rise to stylish design devices and pleasant to the touch streamlined and smooth body.
For some developers, a rounded panel is not enough and they use special high-tech materials, trying to achieve the effect of a volumetric screen. Application of plastic and flexible electronic boards allows you to create a truly three-dimensional display with curved edges. A striking example is the products Samsung- models Galaxy Note Edge, S6 Edge, G Flex. The spectacular appearance of 3D glass can be complemented by the smoothing of the edges of the surface itself - 2.5D glass.
In the descriptions technical characteristics Some gadgets, 2.5D glass is mixed together with Gorilla Glass technology. Do not confuse terms that mean fundamentally various parameters. If 2.5D glass is just a format appearance display with rounded edges, then Gorilla Glass is a technology for manufacturing a chemically strengthened aluminosilicate material. It allows you to create screens that are durable and resistant to impacts, falls and scratches. Accordingly, it can take any shape, including streamlined.
Actual advantages of 2.5D glass:
- Ergonomic - surface smoothness in all directions. No one wants to run into a sharp glass edge while putting their hand in a pocket, a bag for a phone, or while typing a text blindly. In addition, the curve prevents the user's hands from extending beyond the edges of the display - many devices with convex edges are only partially covered with glass.
- Aesthetic - the appearance of smartphones with 2.5D glass is considered more attractive than a flat screen covered with side frames.
2.5D glass has no other secrets - technologically, production completely repeats the procedure for manufacturing a flat glass panel... up to the stage of cutting the workpiece. Chamfers (rounded right angles) are created along all edges, which makes the cost of the product slightly higher. Impact resistance, wear resistance, water resistance, flexibility - these are the parameters of the panel materials and filling, the mounting method, but not the screen format.
Conclusion: the presence of 2.5D glass among the advantages of a gadget, or its absence among the disadvantages, is not a determining factor when choosing a smartphone, depending only on the specific aesthetic tastes of the end consumer.