OLED technology is key to understanding the operation of folding screens. Although they are already total success, there are still problems to solve to get a terminal that does not end up having problems. It’s undeniable. Since they appeared, they have become one of the undisputed protagonists of the technology industry. In fact, we already told you how folding screens were the centre of attention at the Mobile World Congress 2020, where large companies surprised by their risky launches. A few months after MWC19, the Chinese company Xiaomi announced its innovative folding model and, immediately afterwards, Samsung and Motorola joined.

Folding Screens

It is a technology that has been working on for years and that, after many rumours and tests, seems to have settled in the market during the first half of this 2020. However, there are still some doubts about folding screens. Above all, after some failures and problems such as the Samsung Galaxy Fold, which saw how it delayed its launch after detecting a failure. But, bugs aside, how do they work? How do you prevent folding screens from breaking?

Optical adhesive and OLED technology

It would be impossible to create a smartphone capable of folding if we used the classic LED or LCD panels. Therefore, the key to folding screens is OLED technology, although a screen can be bent, an optical adhesive is needed that connects all the layers of the touch sensor and the electrical circuits without breaking when bent.

The OLED screens of folding smartphones are made up of six layers of plastic on the top (seal) and six on the bottom (substrate), two terminals and two layers of organic molecules. These layers of organic molecules allow for thinner, lighter and more flexible screens. Also, they are brighter and use less energy.

Vulnerable to Moisture and Shock

However, OLED technology and folding screens also have weak points. The lifespan of OLED diodes is much less than the lifespan of LED or LECD displays. In addition, they are much more vulnerable to humidity, which has complicated the launch of more than one terminal.

Another weak point is that, since they do not have glass, the plastic is much weaker, so phones with folding screens are easier to scratch. In addition, on many occasions after bending the device thousands of times, the stress ends up taking its toll on the materials and creating failures.

Without a doubt, it is a technology that can be used a lot, but perhaps we still have to wait a couple of generations to see the perfect terminal.

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