TechnologyThe Foldable Screen Working Principle

The Foldable Screen Working Principle

In recent years, more and more mobile phone manufacturers have launched foldable screen products, and with the influx of other manufacturers, the price of foldable devices is rapidly declining, indicating the arrival of a new era of flexible foldable screen products. But how does the folding screen work? In this blog post, we will discuss how foldable phones work.

How Foldable Phones Work?

Folding Screen Basics

Flat, curved, and flexible screens work in much the same way, using millions of color spots (pixels) to form the image seen on the screen. Different pixel compositions are derived from a variety of displays, including LCD, OLED, and more recently micro-LED and mini-LED. All of these pixels are located on a layer of material called the substrate. As technology has improved, display manufacturers have found ways to increase the amount of bend they can safely embed in the screen.

OLED Material Advantage

At present, the mainstream flexible folding screen on the market is an OLED flexible screen which is mainly composed of a base, an anode, a conductive layer, a luminous layer, and a cathode. OLED screens don’t have backlights like LCDs do – instead, pixels glow when powered on. Because of this, OLEDs can be about 30% thinner and lighter than LCDS.

Working Principle

OLEDs are stacked into several ultra-thin layers on a glass or plastic substrate, in which multiple layers of organic compounds are sandwiched between two electrodes (cathode and anode). When a voltage is applied to the electrode, the electrons from the cathode and the holes (positive charges) from the anode attract each other and meet in the light-emitting layer. When an electron is combined with a positive hole, the OLED emits light, releasing energy in the form of photons. Simply to fold, that is, to fold the components and structure of the screen, the previous screen design is not possible, especially not freely bent glass as the screen base, so it must be redesigned.

Folding Screen-level Distribution

The foldable screen has a total of four layers: the substrate layer – also known as the board, which is the bottom layer of the screen, which supports all the other layers; the TFT layer-The TFT (thin film transistor) layer is applied on top of the flexible substrate and controls the power transmission of each pixel; The OLED layer – the light-emitting layer, consists of a single pixel, each containing red, green and blue sub-pixels. By varying the amount of power received by its sub-pixels, each pixel can achieve a specific color and brightness; The Covering layer – also known as the encapsulation layer, is the layer that seals and protects the other layers.

Prospect Forecast

Although phones can for now only be folded once, manufacturers have unveiled concept items that have the ability to fold twice or more. Numerous manufacturers have released or showcased foldable screen gadgets, including laptops, TVs, and cell phones. It’s not difficult to envision bending screens in home appliances, game consoles, tablets, and wearable technology. Displays that are stretchable, wearable, and even skin-grafted will bring forth further innovations. Additionally, foldable screens will only get better as funding for technology increases. In addition, the current price is constantly decreasing, and the cost performance page has been improved, such as the HONOR Magic V2 UK price is available in British.


Folding screen mobile phone is the exploration of future technology, because of novel, good-looking and other reasons, there are more and more young people like folding screen mobile phones, if you also want to try, now seems to be a good time for the available purchase.