The picture shows a 4-inch flexible display panel
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Video conferencing through office glazing, traffic information on the bus stop glass, and mobile phone screens can be folded up... These scenarios are expected to become a reality in the near future. With the continuous advancement of flat panel display technology, flexible display will provide more imagination for people.
In 2012, South Korea's Samsung and LG Display announced the production of large-size OLED TVs before the end of the year. Recently, LG Display said it will develop a "60-inch flexible transparent display" in 2017. Samsung also intends to apply flexible display in 2013. On the mobile terminal. Under the strong push of flat panel display manufacturers, the differential display terminal brought by flexible AMOLED may revolutionize the terminal.
Korean companies compete for the launch of the card position
Regardless of large-size OLEDs or flexible displays, Korean companies are taking the lead in entering the market with their vertical integration of components and brands.
In recent years, many panel manufacturers have actively deployed in the research and development of flexible displays, and Korean companies have spared no effort. Recently, Samsung announced a demonstration video of a flexible AMOLED display under development. Later, it was reported that Samsung will invest 2 trillion won (about 1.8 billion US dollars) for OLED research and development, of which 300 billion won will be used to strengthen flexibility. Production of panels. At the same time, LG Display also announced that the 6-inch flexible plastic display based on electronic paper technology will enter the mass production stage.
LG Display Mobile/OLED business director Lu Xiangde, deputy director said: "LG Display mass production of the world's first plastic electronic paper screen, will greatly promote the rapid development of the e-book market. At the same time, the mass production of plastic electronic paper screen will also Accelerate the development of OLED products and flexible displays."
In fact, many manufacturers have carried out research and development on flexible panel materials, and major manufacturers including Samsung have exhibited related products at the display exhibitions over the years, whether they are actively expanding the production lines of G5.5 and G8.5. Construction, or the development of flexible technology, Korean companies want to take the lead in entering the market with their vertical integration advantages of components and brands.
Zhang Xiaoyu, vice president of TrendForce, said in an interview with China Electronics News: "At present, flexible panels are not the first target developed by Taiwanese and mainland panel makers in China, but they are being researched and developed in the laboratory. Now everyone is actively pushing up the plane. The yield of AMOLED. For flexible display, there is still a bottleneck in mass production at the flexible technology and material end, and the mass production capacity of the panel factory is still the key to its development."
The reporter also learned in the interview that Visionox has realized the development of monochrome and color flexible OLED products in the laboratory a few years ago. The monochrome display effect has been good, but it has not yet been commercialized. For Visionox, the layout of large-size AMOLEDs is the focus of development at this stage.
AMOLED becomes flexible showing the main direction
AMOLED combines the characteristics of non-breaking and flexible, and is the main technical route for manufacturers to develop flexible products.
Flexible display is a very promising display technology, and the development of flexible display technology makes the display of information more flexible and diverse. At present, the main technologies for implementing flexible display include: liquid crystal display (LCD), organic electroluminescence (OLED) and electrophoretic display (EPD), which can replace the wrapable original and match the wraparound drive substrate. To achieve a flexible display.
The reporter learned that Samsung and LG Display initially developed flexible display products with AMOLED technology. In the past year or two, Samsung has continued to strengthen the development of flexible screens for AMOLED technology. In addition to the development of AMOLED flexible screens, LG Display is also developing EPDs. Technical rewindable electronic paper products.
Zhang Xiaoyu told the China Electronics News: "In terms of TFT-LCD, suppliers can achieve thin glass of 0.1mm and produce it in a Roll to Roll way to achieve the wraparound characteristics, but it is not unbreakable. In addition, the current TFT device machine specifications cannot be directly produced. Currently, panel manufacturers are not actively investing."
Zhang Xiaoyu believes that AMOLEDs have fewer backlights that TFTs must use, and are thinner and lighter. At the same time, upstream material manufacturers and panel manufacturers are also actively seeking substrate materials with unbreakable properties to replace glass, and at that time, they can take into account the characteristics of no cracking and wraparound. But resolution is an inherent obstacle. As for the EPD, I am afraid that after the market players gradually withdraw, it is difficult to develop in the future. Korean manufacturers still basically use AMLOED as the main axis of product development.
LG Display said it will develop a "60-inch flexible transparent display" in 2017 with ultra-high definition (UD) quality and a light transmission of over 40%. The display technology used in this product will be based on organic light-emitting diodes (AMLOED).
Solve the key problems before the terminal revolution
Solving the resolution problem of AMOLED and how to find the most suitable appearance conforms to the usage habits is the key to whether the revolution can be set off.
In recent years, in order to seek differentiation, Samsung has launched an AMOLED mobile phone terminal with slim and light advantages. However, with the continuous advancement of TFT-LCD technology, technologies such as In-cell touch can also be made thin and light, and the difference that AMOLED can bring can not set off a revolution. In contrast, flexible AMOLED technology, in addition to thin and light, also has unbreakable characteristics, the security advantage will attract more consumers' attention, coupled with the flexible mobile phone terminal in the appearance of breaking the traditional flat device, the future has the opportunity to drive the phone A new round of revolution.
Zhang Xiaoyu told the China Electronics News reporter: "AMOLED originally had the problem of resolution. This problem will still appear on the wraparound AMOLED. Therefore, the resolution of AMOLED is solved, and how to find the most suitable appearance conforms to the usage habits. It should be the key to the revolution."
According to Displaybank's forecast, the flexible display market will grow from US$1.1 billion in 2015 to US$42 billion in 2020, accounting for 16% of the overall flat panel display market; shipments will increase from 25 million units in 2015 to 800 million units in 2020, accounting for about 13% of the overall market. Flexible display products will not only replace existing display products, but also lead to market growth with the creation of a new display application market. The market size of alternative products has increased from US$500 million in 2015 to US$1.9 billion in 2020, while the new market will grow from US$600 million in 2015 to US$2.2 billion in 2020.
Zhang Zhen, a professor at Kyung Hee University in South Korea, believes that flexible AMOLEDs have great business opportunities, and future TVs will use flexible displays.
From the experience of AMOLED development, it can be seen that Samsung's development of small-size AMOLEDs has matured, and large-size TVs still cannot be mass-produced. The mass production of large-size AMOLED TVs has been postponed, mainly because the technical bottleneck is still difficult to overcome. To mass produce flexible AMOLED TVs, the yield, mass production and cost issues are still unavoidable.
In fact, the most important significance of the development of flexible AMOLED display is to change people's habits of using the display. If it can find its suitable application and market, it will become a breakthrough point of AMOLED technology.
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