1) What is a flexible display?

The “display” is a plain surface that you see when you look at your phone and when you operate it. From a more professional point of view, the display is an electronic material that "hidden" under the glass or plastic case and is responsible for illuminating the phone.

Samsung and LG's flexible display is an organic light-emitting diode (or OLED ) under a glass casing that is made of a flexible material such as plastic instead of hard glass. Companies such as Samsung and LG have spent years developing flexible displays, and the Samsung GalaxyRound phone represents the first time that mobile phone manufacturers have brought flexible displays to market.

2) The difference between Samsung GalaxyRound flexible display and GalaxyNexus flexible display

The Samsung Galaxy Nexus and the NexusS promote a slightly foldable display that fits closer to your cheeks. It essentially uses wavy glass instead of OLED materials.

3) Can Samsung GalaxyRound bend?

The answer is No! The Samsung GalaxyRound features a 5.7-inch full HD super-flexible AMO LED display , but it doesn't mean it can be folded by hand. Although the display of this device is in a certain arc, the entire phone is still hard and therefore cannot be bent.

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, "bending" can refer to OLED (or LCD), or glass, or both.

In addition, flexible displays have many other forms, such as "wavy shapes." As far as the Samsung GalaxyRound is concerned, the display has a certain curvature, not straight, so that it can better fit the user's face. Companies that make such devices bend the display in some cases, such as the Samsung GalaxyRound. However, the rest of the phone is fixed.

Another type of "flexible" display is "bendable." Think about the bank cards in our wallet, they can be slightly bent, but not completely folded. The third type of flexible display refers to the "foldable display" we often refer to. The last is the "volume display", also commonly referred to as the upgraded version of the "flexible display."

5) Why is the flexible display so pleasing, what advantages does it have?

In fact, the advantages of today's curved displays (such as Samsung GalaxyRound) have not yet been demonstrated. However, the flexible display has several advantages. For example, they are more durable (especially drop-proof), mainly because they may use plastic materials rather than glass materials. At the same time, the use of plastic materials can make the equipment lighter and thinner. At the same time, mobile phone manufacturers can break the traditional rectangular screen tradition and create mobile phones with different shapes. However, if the force is too strong, the plastic screen can also be broken. Currently, glass manufacturers are also designing a flexible glass.

However, the durability issue poses another question: Why not produce a plastic display phone? Experts say that flexible displays can do things that other displays can't do. Imagine if you can fold the phone or tablet into the pocket, or stretch the display and use it as a map. Flexible displays can even be used as clothes or jewelry. If you can overcome the difficulties, the flexible display will be "promising."

6) Barriers to the production of flexible screen smartphones

Developing a flexible phone is no easy task. At present, batteries and other circuit constructions are still "straight straight". The durability and internal parts of foldable phones are currently problematic. Depending on the flexible screen phone design, you may need a flexible display, a cover material, a bendable battery, and a stretchable silicon material.

Some of the above materials are already under development. LG has previously released a new battery technology that bends the battery and squeezes it into a tight space.

In addition, the device can be designed to have a hard "spine" that can store parts that cannot be folded. These different flexible designs are possible according to the concept machine presented by Samsung and other manufacturers.

Another major challenge in the production of flexible display phones is mass production. When the new mobile phone is first put into the market, the cost will undoubtedly be higher than that of the standard mobile phone. However, when the production efficiency is improved and the mass production is realized, the cost will gradually decline and the price will fall.

Even if the Samsung GalaxyRound display is curved, not collapsible, its mass production will be a big challenge, which may be why Samsung is currently only releasing this phone in South Korea.

7) Flexible OLED and LCD, which is better?

OLEDs are used in mobile phone manufacturers for flexible, foldable displays. Of course, the LCD can also be bent, but it is not as easy to bend as an OLED.

As a common display screen, LCD is composed of two pieces of glass with a liquid crystal material sandwiched between them to adjust the brightness. LCDs require a light-emitting chip. Although the LCD can be bent, it is very difficult because the distance between the two layers of glass must always be the same.

The OLED does not require a light-emitting chip, it only needs a piece of glass (or glass, metal) to act as the bottom layer. The OLED illuminates the screen by carbon material deposited on the surface, which can be curved. Mobile phone manufacturers will also add a second piece of glass to protect the bottom layer.

8) Is the Samsung GalaxyRound screen made of glass?

I don't know yet, because Samsung did not disclose the specific composition of the screen. It is speculated that Samsung uses plastic polymer materials in this phone. However, Samsung uses a much thinner, bendable glass.

9) Do people want plastic displays?

Plastic displays can make the device truly "flexible", but plastic materials have problems. Plastics are different from glass, which means that manufacturers need to find new ways to use plastic materials without sacrificing the quality of the display image.

Another big problem is that plastic materials have a permeability that allows air and water to enter the device. To avoid this happening, cell phone manufacturers can “coat” a layer of “outerwear” for plastics or use glass-plastic hybrid materials.

SriramPeruvemba, chief marketing manager for Silicon Valley flexible touch display technology company Cambrios, said: "A lot of problems can be solved through investment development."

9) Foldable glass

A year ago, CNET, the US technology website, first saw Corning Liumu Glass, a very thin flexible glass. Corning said the glass can be used in display materials.

10) Is there any other use for flexible displays?

Although we don't know whether a collapsible smartphone is practical yet, this touch-enabled display technology is now well practiced, such as a curved touch display applied to a smart watch or other wearable device.