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Truly and FlexEnable sign License Agreement to bring low-cost, scalable flexible display production to China

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31 July 2017 – FlexEnable, the leader in the development and industrialization of organic electronics for flexible displays and sensors, has signed a technology transfer and license agreement with Truly Semiconductors, one of the leading display makers in China. The deal aims to bring FlexEnable’s flexible organic liquid crystal display (OLCD) technology into mass production on Truly’s lines within 2018.

 

Due to its high performance and low cost manufacturing process, OLCD is the only display technology today that can deliver flexible displays with large area, low cost and high brightness with long lifetime. With a bend radius that can go below 20 millimeters, OLCD meets the market needs for a range of applications across consumer electronics, smart home appliances, automotive, digital signage and beyond.

 

OLCD is based upon FlexEnable’s flexible low temperature organic thin-film transistor (OTFT) backplane technology, which can be manufactured on existing TFT LCD production lines using low cost plastic substrates such as TAC and PET. The OTFT backplane has better electrical performance than amorphous silicon, giving plastic LCDs the same display quality and reliability as glass-based LCDs, while making it thinner, lighter, shatterproof and conformable to surfaces.

 

Truly, the first display manufacturer to adopt OLCD, will implement the process into its existing production lines in Shanwei, China. The first product samples will be available to commercial partners in early 2018, with volume production expected in late 2018.

 

Chuck Milligan, CEO of FlexEnable, says, “Truly is a leader in displays manufacturing and a top-level supplier of displays to key market segments to which FlexEnable’s technology can bring great commercial advantages. We are already working with brands who use OLCD in their product concepts and who now need access to a volume supply chain to realize some very exciting new product offerings with designs that simply aren’t possible with other types of display. We are excited that Truly has become the first display manufacturer to implement FlexEnable’s game-changing OLCD platform and meet market demand for flexible displays.”

 

KK Ho, General Manager, R&D center, Truly Semiconductors Ltd, says, ”FlexEnable’s OLCD technology is a breakthrough in the TFT-LCD industry and with its characteristics of thinness, lightweight, and more durability it is going to create lots of possibilities for innovative product design. We have been receiving many enquiries for flexible display from the market, specifically, wearable devices, smart home appliances, electric cars and self-driving cars etc. This is a pretty exciting display technology and we do believe there is a considerable potential market size.”

ETRI’s Development of OLED Display With A Graphene Transparent Electrode

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Reporter : Hana Oh(HanaOh@ubiresearch.com)

Researchers from Korea’s ETRI Institute developed a graphene transparent electrode for OLED display. Especially, they developed the process of patterning a graphene transparent electrode in exact size and shape on a large-sized substrate. Its application to smart watch requiring flexibility will be available.

ETRI(Electronics and Telecommunications Research Institute) has succeeded in developing a display with the electrode using graphene, a dream new-material, rather than using ITO(Indium Tin Oxide) that has been often used as existing electrodes for OLED display.

The successful display substrate is the current world’s largest one of 370mm x 470mm, a 19-inch monitor in size. The thickness of graphene electrodes is less than 5nm.

ETRI expects that if the graphene is deposited on flexible substrate, thin and flexible display will be feasible. Furthermore, it will become the source technology that can be used for manufacturing wearable devices applicable to clothing or skin.

In general, OLED is stacked with substrate, ITO transparent electrode, light-emitting organic layer, and anodized aluminum. The researches replaced typical ITO with grapheme.

In particular, ITO that has been used as existing electrode has a disadvantage of being made of fragile glass. Therefore, the display manufactured with this technology will clear up the problem of fragile transparent electrode.

ETRI developed graphene growth technology and oxide technology to be applied as an OLED transparent electrode by making a large-scale substrate in collaboration with Hanwha Techwin Co.,Ltd, and secured the grapheme transparent electrode fabricating and process technology with the sheet resistance of 60Ω/m² and the transmittance of 85% applicable to OLED. Especially, ETRI developed the world’s first micro-patterning process that is absolutely required for the display process.

Using this technology, ETRI successfully lighted the world’s largest grapheme electrode OLED panel of 370mm x 470mm. The finding of this study, which was published and demonstrated at 『Graphene 2017』, the world’s largest graphene conference held in Barcelona, Spain in early April, 2016, was highly acclaimed.

The researchers started to research grapheme transparent electrodes for OLED, based on the 4-year support of the Ministry of Trade, Industry and Energy(MOTIE) and Korea Evaluation Institute of Industrial Technology(KEIT) from 2012. They successfully developed a 100mm x 100mm OLED panel last year through the recent world’s largest demonstration, starting with a 7mm x 10mm coin-sized one, at the end of 2015, leading to the higher applicability of a grapheme-based display.

They said they will develop the display with a plastic substrate instead of a glass substrate. It is possible to manufacture a wearable OLED device if grapene is attached to plastic substrate, ETRI added.

ETRI’s Flexible Device Research Head Cho, Nam-sung said “The realization of a general expectation that grapheme would be applied to OLED display is very significant. We expect it will be successfully deployed on an commercial scale through large-scale grapheme film, OLED panel technology, and flexible OLED panel technology.”

This technology is expected to edge ahead from the later competitors including China as the core technology that can further increase the level of flexible OLED displays.

Visionox Announced OLED’s Own Innovative Technology is Flexible Display

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Visionox’s principle researcher Li Lin gave a keynote speech with a theme “Development of Foldable AMOLED Display” at the 3rd OLED Korea Conference held for two days from March 8 to 9 by UBI Research.

Principle researcher Li Lin explained the development trend of flexible display, saying “Initial CRT was originally developed as an oscilloscope, but due to the development of full-color technology, it has been used commonly in our lives. LCD was also developed as a segment display, but due to the development of semiconductor technology, TFT black plane was applied to LCD so that LCD could be able to be used for smartphone and large-screen TV as well. The combination of the latest electronic technology and material technology enables display innovation, and the most innovative technology of OLED different from existing displays is a flexible display, Visionox is intensively developing now”.

In addition, he introduced the development history of Visionox’s flexible display, unveiled touch sensor 7-inch foldable AMOLED display that was developed in November 2016, and announced this module featuring 180° out-folding passed a folding test.

<Flexible AMOLED display with the touch-sensor featuring 180° out-folding, Source: Visionox.com>

He added that in order to develop foldable display, it is very essential to improve reliability of TFT, use durable materials such as strong OCA, scratch-resistant and durable cover window film, thinner circular polarizer layer, and panel-combined touch panel, and decrease module thickness.

Meanwhile, principle researcher Li Lin said “The mass production of Flexible OLED panel finally depends on the yield improvement. But, skills and experience for mass production are still insufficient.” Regarding the question about the development of circular polarizer layer, he answered “Reducing thickness is a key. And, we are considering the way to combine with another layer.” Lastly, regarding the development of Touch panel, “Among various technologies, especially on-cell technology is now under examination”, and regarding materials, “Metal mesh seems to be a good alternative, but there is no specific plan yet” he announced.

What is the key to successfully commercializing the Next Flexible OLED?

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During the 3rd OLED KOREA CONFERENCE Samsung Display’s head researcher Taewoong Kim gave a keynote presentation on the topic of ‘Flexible Display: Application & Technical issue’

Head researcher Taewoong Kim emphasized that the 3 factors ‘Technical Breakthrough, New Application, and Strategic Partnership will be the key that successfully commercializes flexible OLED.

Head researcher Taewoong Kim mentioned that the first key for the successful Flexible OLED, Technical Breakthrough, has the four issues, improving durability of cover window and surface-coating of organic-inorganic materials, flexible electrode material and low resistance touch panel, decreased layer numbers and flexibility of encapsulation, and backplane which has low stress structure and demands a flexible and robust TFT material.

It was announced that the 2nd New Application needs an area expansion in Life & Health, transportation, wall display, loT, signage/PID, and education. Having the strength of design freedom, the Flexible AMOLED can be applied to various areas such as shoes, watches, glasses and the roll able which is an optimum display that is small and can maximize portability and materialize large screens. Even though the automotive has a long way to go due to lots of issues such as low life expectancy in harsh environments, it was emphasized that the AMOLED can create various applications.

Finally, head researcher Taewoong Kim emphasized and concluded with the win-win strategy through panel, material, equipment, and communication, collaboration, confidence between industry-university-institute was needed.

According to the ‘Key Issue and The Market Analysis for Foldable OLED’ by Ubiresearch, Samsung Electronics has successfully entered the smartphone market through design differentiation by using flexible OLED and is predicted that even several other set companies will actively use the flexible OLED to have competitiveness in the premium smartphone market. Following this, it is forecasted that the flexible AMOLED panel (including for smart watches) will grow to 1 billion in 2020.