The emergence of folding screen mobile phones in 2018 attracted more attention from people in the smartphone industry. The first is Rouyu, the manufacturer that took away the title of Samsung's folding screen mobile phone. Its new FlexPa features a 7.8-inch flexible screen that can be folded from the middle. So now let's talk about Samsung's folding screen. It is very difficult to explain the technical details of the folding screen very simply, because the current technologies and products have not been officially launched. More technical details about the principle of folding screens Still belong to each of the trade secrets. Some people confuse flexible screens with folding screens. For ease of understanding, you can think of a folding screen as a flexible screen Plus. Because literally, Samsung's "Infinity Flex Display" is an "infinite flexible display", which can be bent 360 degrees infinitely, thus realizing folding.

And now the folding screen mobile phone is a new opportunity. In the case of the homogenization of mobile phone screen design, Samsung and Royole have shown a new model-folding screen. The feature of the folding screen is to double the screen size without greatly increasing the size of the device. Among them, the first core of folding screen mobile phones is the hinge where the two screens of the mobile phone are folded. In addition to the foldable and thin design, the shaft of the intermediate core component also needs to be light, flexible, thin and reliable.

Let's take a look at Huawei's 5G folding screen mobile phone. In addition to the expensive flexible screen, the price of the internal structural parts is also a factor. Some analysts believe that the folding screen shaft is the most important mechanical component of the folding mobile phone. The structure of the folding screen is mainly divided into four layers. , followed by screen protection layer, bendable flexible screen, soft rubber support sheet, and rotating shaft. The hinge of the hinge plays a key role in the seamless fit of the folding phone, which almost determines the success or failure of the folding screen. Because it is not only thin, but also more than 100 components related to the folding screen, such as connections, wiring, heat dissipation, etc., are designed in a perfect way, and reliability and user grip must also be considered. The success of the hinge has gone through from the principle of motion to the design of sub-function modules, to the selection of materials, and the attempts of different surface treatments, which can be described as eagle-wing folding.

The screen folding needs to rely on the hinge shaft to support the rotation. The requirements for the rotation accuracy and friction coefficient are particularly high, so the requirements for the supplier are higher. Compared with the notebook computer shaft, the folding screen mobile phone shaft is precise and durable. , strength and thin specifications are much higher than the notebook computer shaft. In fact, hinges have been used in flip phones in the past, but with the popularity of candy bar smart touch phones, there are fewer and fewer flip phones, and many hinge manufacturers have transformed into non-mobile phone products. It is believed that in the future, folding screen mobile phones will lead the future and fold for the next decade.