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Good day,
Foldable smartphones are becoming more and more normal, here in Germany I regularly see people walking around with such a smartphone.
Honor has also ventured into this area of smartphones with the Honor Magic V, one of my favorite foldable smartphones in terms of design.
Personally, I find the technology behind it very exciting, so today we'll take a look at what makes a foldable.
Have fun
The bendable OLED display is the easiest part
When it comes to the challenges that manufacturers face when building a bendable smartphone, almost everyone immediately thinks of the foldable display. Yet the display panel is the easiest part to manufacture. Flexible OLED panels were already introduced by manufacturers in 2011.
The foldable plastic OLED displays are more or less foils covered with a film of self-luminous organic light diodes. The electrical conductors needed to drive the individual subpixels are also incorporated into these film-like panels.
Building such a flexible OLED panel was no problem back in 2011. However, it became complicated when it came to the question of how such a panel could be used in a functioning and foldable device. After all, not only the display has to bend, but also all components around it.
Glass does not bend - and plastic scratches
Things already get complicated when it comes to the outer coating of the display. As is well known, the panel of an ordinary smartphone is protected by a layer of scratch-resistant Gorilla Glass. Since glass cannot be bent, another solution had to be found for foldable phones. Manufacturers like Honor with the Magic V have therefore opted for a display surface made of a polymer compound. In other words, there is now a flexible plastic layer on a flexible plastic OLED screen.
This plastic can be bent to the same extent as the OLED panel underneath. Nevertheless, it has a decisive and not to be underestimated disadvantage compared to Gorilla Glass: It is significantly more susceptible to scratches. This problem will accompany foldable smartphones - at least in the first generation. Suddenly, the question of the durability of smartphone screens, which actually seemed to have been settled long ago, is back on the table.
However, it is a small miracle that manufacturers have now managed to create highly flexible touch displays that still function as touch displays.
Not only the display has to bend
When you think of a foldable smartphone, you first think of the flexible display. In fact, countless other components have to bend as well. And even the parts that don't bend have to be flexibly mounted so that they continue to function together with the other components when the device is bent.
The bending mechanism ultimately affects every connection, every circuit board and every screw inside the device, no matter how small. Every time the smartphone is opened and closed, a mechanical process takes place that results in mechanical wear - although it may be minor. What this means for the lifespan of the devices cannot be said in advance. However, durability is definitely a bigger challenge for a foldable smartphone than for a classic one.
A tablet-sized screen consumes more power
One issue that is also back on the agenda with the advent of foldable smartphones is battery life. After all, the idea is to have a smartphone that can take the form of a tablet if desired. However, it consumes noticeably more energy in this form because of the size, which affects the battery life.
Against this background, it is no wonder that the manufacturers have opted for a dual-battery solution. The battery consists of two individual parts on both sides of the kink that are charged via a common port and treated like one big battery by the software.
Source: https://www.turn-on.de/article/faltbares-smartphone-die-technik-und-die-herausforderungen-dahinter-467300?from=https%3A%2F%2Fwww.google.com%2F
Conclusion:
The development of foldable smartphones involves many challenges that need to be solved, we are now still relatively at the beginning of the foldable smartphone era. But I am sure with time the smartphones will become so good that it will be completely normal to own a foldable device and the concept of foldable displays we will certainly see more often in other products.
What do you think about foldable smartphones? Let me know in the comments :)
Schildizz
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