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What is a flexible display? Reveal the mystery
Jun 29, 2017

According to foreign media reports, Samsung, LG and other companies have shown people its flexible display (flexible displays). Before they are also appearance as a prototype mobile phone, and now the flexible display will begin to open the commercialization of the road. Samsung Galaxy Round mobile phone brought us a lot of questions: What is the flexible display? What does the flexible display really mean? What are the advantages of flexible screens for smartphones or other devices?


1) What is a flexible display?

"Display" popular means that you look at the phone and see the operation of the smooth surface. From a more professional point of view, the display is "hidden" in the glass or plastic shell under the electronic material, responsible for lighting the phone.

Samsung and LG's flexible display is an organic light-emitting diode (or OLED) located under a glass envelope, which is made of a flexible material, such as plastic, rather than hard glass. Samsung and LG and other companies took years to develop flexible display, and Samsung Galaxy Round phone also represents the first mobile phone manufacturers will be flexible display into the market.

2) Samsung Galaxy Round flexible display and Galaxy Nexus flexible display of the difference

Samsung Galaxy Nexus and Nexus S is a kind of a slightly folding display, it can be closer to your cheek. It is essentially used in the wavy glass, rather than OLED materials.

3) can the Samsung Galaxy Round be bent?

The answer is No! Samsung Galaxy Round with 5.7-inch full HD super-flexible AMOLED display, but it does not mean that you can hand folding. Although this device display a certain degree of curvature, but the whole phone is still hard, so can not bend.

4) Why do people call it a flexible display?

Part of the reason may be that people have different definitions of "flexibility". As noted above, & quot; bend & quot; may refer to OLED (or LCD), or glass, or both.

In addition, there are many other forms of flexible display, such as "wavy shape." Samsung Galaxy Round, the display has a certain degree of curvature, not flat, so that you can better fit the user's face. Companies that manufacture such equipment will bend the display in some cases, such as the Samsung Galaxy Round. However, the other parts of the phone but are fixed.

Another type of "flexible" display is "bendable". Think of the bank cards in our wallet, they can make a slight bend, but not completely folded. The third type of flexible display refers to the "foldable display" that we often refer to. The last one is the "roll display", often referred to as the upgraded version of the "flexible display."

5) Why is the flexible display so likable, what is its advantage?

In fact, the current surface display (such as the Samsung Galaxy Round) has not yet demonstrated the advantages. However, the flexible display screen has several major advantages. For example, they are more durable (especially drop), mainly because they may use plastic material rather than glass material. At the same time, the use of plastic materials can also make the equipment lighter and thinner. At the same time, mobile phone manufacturers can also break the standard rectangular screen tradition, to create a different shape of the phone. But if too much force, plastic screen can be broken. At present, glass manufacturers are also designing a flexible glass.

However, the durability problem poses another problem: why not produce a plastic display phone? Experts said that the flexible display can do some other display can not do things. Imagine if you are able to fold your phone or tablet in a pocket, or stretch the display as a map. Flexible display can even be used as clothes, or jewelry. If you can overcome the difficulties, flexible display will be "promising".

6) the production of flexible screen smart phone obstacles

Developing a flexible phone is not easy. At present, the battery and other circuit construction are also "straight to the". The durability of the foldable phone and the internal parts are still problematic. According to the flexible screen mobile phone design, you may need a flexible display, covering materials, flexible batteries and stretchable silicon material.

Above the required materials, some have already started in the development. LG has released a new battery technology, it can make the battery bent, squeeze it into a small space.

In addition, the device can also be designed to have a hard "spine" that can store parts that can not be folded. According to Samsung and other manufacturers to show the concept of the machine, these different flexible design is possible.

Another challenge for producing flexible display phones is mass production. New mobile phones in the market, the cost is no doubt higher than the standard mobile phone, but when the production efficiency, to achieve mass production, the cost will gradually decline, the price will fall.

Even if the Samsung Galaxy Round display is curved, but not collapsible, its mass production will also be a big challenge, which may also be released in South Korea is currently only the reasons for this phone.

7) can be flexible OLED and LCD, that better?

Mobile phone manufacturers to display the flexible, foldable display are using OLED. Of course, LCD can also be bent, but no OLED as easy to bend.

LCD as a common kind of display, it is composed of two pieces of glass, the middle of the liquid crystal material, you can adjust the light. LCD needs a light-emitting chip. Although the LCD can be bent, it is very difficult because the distance between the two glasses must always be consistent.

The OLED does not need light-emitting chip, it only needs a piece of glass (or glass, metal) to serve as the bottom. The OLED emits the screen by the carbon material deposited on the surface, which can be bent. Mobile phone manufacturers will join the second piece of glass to protect the bottom.

8) Is the Samsung Galaxy Round screen made of glass?

Still do not know, because Samsung did not disclose the specific composition of the screen material. Outside speculation, Samsung in this phone is the use of plastic polymer materials. However, Samsung is more like a very thin, and can bend the glass.

9) Do people want a plastic display?

Plastic display allows the device to truly "flexible", but there is a problem with plastic material. Plastic is different from glass, which means that manufacturers need to sacrifice the quality of the screen without the case of the use of plastic materials to find a new way.

Another big problem is that plastic materials have a permeability that will allow air and water to enter the equipment. In order to avoid this all happen, the handset manufacturer can make a "coat" of plastic "coat" or use a glass plastic blend.

"Many problems can be solved by investing in development," said Sriram Peruvemba, chief marketing manager for Cambrios, a flexible touch-screen technology company in Silicon Valley.

9) Foldable glass

A year ago, CNET first met Corning willow glass, which is a very thin flexible glass. Corning said the glass can be used for display materials.

10) Are there any other uses for flexible displays?

Although we do not yet know whether the smart phone is practical, but this touch-screen technology has been a very good practice, such as the application of smart watches or other wearable devices on the curved touch screen.

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