How many major panel makers in Taiwan are rushing in, how will Micro LED go in the future?

Panel companies in Taiwan have been actively promoting the development of MicroLED technology. Since the Korean manufacturers LGDisplay and SamsungDisplay have monopolized the entire OLED panel field, panel manufacturers in mainland China are also investing heavily in OLED panel technology, so the panel makers in Taiwan are very hopeful. Some achievements have been made in the technology of MicroLED to achieve overtaking in corners.

Hon Hai Group sprinted Micro LED, and Innolux, Rongchuang and Fanxuan made three major advances. Innovative panel technology advantages and assists, Rongchuang has a more important role, not only for the development of Micro LED technology, but also for important investment in the investment layout; the newly added sail announcement, the European team took the initiative to find the door to cooperate to develop key huge shifts Transfer technology.

Micro LED market outlook, the industry rumors, Apple iPhone display, will gradually move from LCD, OLED to Micro LED, plus Samsung has announced that the world's first Micro LED modular TV "The Wall" open pre-order, is expected in the third quarter Shipped. At this time, Hon Hai Group has a positive layout, which is intended to win the iPhone's future panel orders. It will simultaneously compete with Samsung in large-scale applications such as TV to accumulate energy.

Industry insiders pointed out that Micro LED technology involves two major industries, panel and LED. Hon Hai Group must mobilize related resources, and process equipment is also a key. Due to the huge transfer problem of Micro LED, Imec, the world's largest independent microelectronics research and development organization, took the initiative to find a sail, and jointly developed a "grain planter" experimental machine to achieve massive transfer. Goal is moving forward.

Imec is known as the "important head behind TSMC, Samsung, Intel and Huida", and is closely cooperating with semiconductor materials and materials. Fan Xuan confirmed that there were European units looking for the door and commissioned the technical process, but the two sides had confidentiality agreements and could not disclose details.

Backed by panel technology, Innolux cut into the Mini LED at the beginning, attracting attention from major automakers. Ding Jinglong, head of the Group's Executive Vice President and Technology Development Center, said that Micro LED will be the next generation mainstream. Before the technology matures, Innolux will develop the AM Mini LED vehicle panel and actively develop other small and medium size applications. It will be the first to be commercialized, and then gradually transferred to the Micro LED.

In addition, Hon Hai Group has previously invested in the US Micro LED industry eLux, and has been looking for Sharp, Innolux, and Rongchuang to participate in eLux. Statistics show that Innolux and Rongchuang hold 13.64% and 9.09% respectively, highlighting Hon Hai’s chairman, Guo Taiming, who is highly dependent on Innolux and Rongchuang’s development of Micro LED.

The industry has judged that Apple and Hon Hai Group will work closely together, and Innolux and Rongchuang will play a leading role. Rongchuang is an important LED-to-investment company of Hon Hai Group. In cooperation with Group Resources, it will cooperate with panel customers such as Innolux and Sharp. At the latest, in the third quarter of this year, Mini LED backlight panel will be launched. Rongchuang is also actively developing Micro LED technology and is fully committed to the goal of mass production.

In addition, on the 8th, LED Epitaxial Factory Guangsheng Shareholders' Meeting re-elected the directors, and it was reported that Hon Hai Group had intentionally intervened. In the end, Rong Chuang won the two directors of Guangxu, respectively, represented by Rong Rong, Chairman of the Board of Directors Fang Rongxi and Director Zhuang Hongren. Created in the Hon Hai Group layout Micro LED plays a key role.

AUO, Jingdian Micro LED scores

All walks of people rushed into the Micro LED market, and AUO took the lead in exhibiting the world's highest resolution full-color active Micro LED display technology, announcing the production schedule. ITRI ​​assisted Jingdian, Xinxing and Accumulation, and developed the "ultra-small-pitch Micro LED indoor display" module to attack the 110-inch indoor display market.

According to the research, the potential business opportunities of Micro LED are huge. If Micro LED replaces the components of liquid crystal display, the market size will reach 30 billion to 40 billion US dollars (about NT$900 billion to 1.2 trillion). Global technology giants and heavyweight research institutions are actively investing.

At the time when Hon Hai Group fully mobilized the development of Micro LED, AUO developed the world's highest resolution full-color active 8-inch Micro LED display technology and won the "2018 SID Best Award". , highlighting AUO's technology development capabilities in Micro LED.

AUO General Manager and Chief Operating Officer Cai Guoxin said that AUO has won the “SID Exhibition Best Award” with Micro LED and a number of advanced display technologies, which proves that AUO has long invested in the leading edge of advanced display technology.

ITRI ​​also assisted manufacturers such as Jingdian and Xinxing to enter the field of Micro LED. Wu Zhiyi, director of the Institute of Electro-Optical Systems of the Industrial Technology Research Institute, said that the key technical problems of the “mega-transfer” that Micro LED is currently to overcome are the first time that the ITRI was exhibited at the computer exhibition last week to gather together, Xinxing and Yuchuang. (Invested by Jingdian, AUO and UMC), the "ultra-small-pitch Micro LED indoor display" developed to attack the 110-inch indoor display market.

Wu Zhiyi pointed out that Taiwan's development of Micro LED's industrial chain resources from IC design, LED manufacturing, display panel factory, to system integration vendors is quite complete and internationally competitive.

Micro LED 5 big application should be "differentiated"

In fact, the display application of micro LED technology has up to 5 different types, the difficulty of each application is very different, and the market process is very different.

First, the first major category is the small and medium size display application demonstrated by AUO SID Display Week 2018: the target market is a mobile phone screen, and the competitive technology is a flexible OLED display. For this application, micro LEDs must achieve resolutions above 400 PPI, flexible screens, large scale of output and economics, and then "market competition" with the booming OLED technology. AUO's so-called "no timetable" is mainly for products in this market.

Second, the micro LED will also be applied to smaller screens. For example VR display. The main future competitive technology in this field is the silicon-based backplane OLED. Its core technology is characterized by a higher PPI, even to achieve 2000PPI to achieve the desired near-eye display. Obviously, the technical ability of micro LED in this aspect is still not up to standard, and mass production will not be discussed.

Third, the micro LED may also be applied to larger display devices, such as color TVs. In such large-size applications, the PPI pixel density of micro LEDs is not as high as required, and the prior art is fully capable. However, in the context of LCD TVs leading to 55-75-inch large size and OLED large-scale technology, the cost-effectiveness of micro LEDs is a "big problem" in the field of color TVs.

Fourth, the micro LED can be used in the engineering large-screen display market. For example, Sony's black color LED large screen launched in 2016 can be considered as a product that meets the micro LED standard. In the large-screen field of large display area, micro LED does not need to directly compete with flat panel display technologies such as liquid crystal and OLED. Because the latter's splicing display can't avoid having a picture gap. At the same time, the engineering market has lower requirements on the scale and economic requirements of micro LED output. In the future, the small-pitch LED display technology will be a recognized roadmap from the surface mount to the COB and then into the micro LED era. - This aspect is already in the "production", but the LED crystal particles are not reduced to 10 - 50 microns, but 100 - 300 microns particles.

Fifth, micro LED technology can also be used for liquid crystal backlights. Taiwanese manufacturers have launched high-end LCD products based on this technology. In theory, the liquid crystal display system using a micro LED backlight is eager to obtain an effect comparable to OLED in terms of color and HDR. In the backlight market, micro LED technology is also called mini - LED: the latter is mainly because the LED crystal particle size and arrangement density specifications are more relaxed, which is conducive to the "production" of micro LED.

In short, the application types of micro LEDs are quite different. The PPI index varies from one or two thousand PPIs in the near-eye VR to dozens of PPIs in the backlight or engineering large screen. The technical difficulty is very large. Faced with such a broad market setting, it is obviously impossible for micro LED products to "break through the entire line of mass production." At present, the backlight and engineering large screen are the green niche market for micro LED related technology “low level start and fast landing”.

How to go in the future of Micro LED: also look at the project big screen

Since the beginning of 2014-2017, the small-pitch LED display market has increased by more than 60-80%. In 2018, only the domestic small-pitch LED display market is eager to reach 10 billion yuan. With the development of smart society, big data and smart industry, the future growth of engineering large screen display will be "better".

Based on this market awareness, the author believes that the best way out for micro LEDs at present is in the engineering big screen market. In this market, micro LEDs do not need very high PPI indicators - high PPI is the biggest difficulty of micro LED display technology; at the same time, you can also say goodbye to the "positive competition" of OLED and LCD - this is the biggest competitive pressure of micro LED technology Even the application of the micro LED in the engineering market does not require too much economic efficiency - if the cost per square meter can be reduced to 30,000 to 50,000 (the corresponding liquid crystal display product is 2,000 yuan), it can be widely popularized.

For a new display technology, its growth prospects depend not only on the "technical" factors. It also depends on competitive factors and market affordability factors. In the engineering market, micro LEDs do not play its inherent "limit performance", but they have the "feasibility" of competitive factors and market affordability factors.

The latter is like the liquid crystal backlight display product of micro LED (MINI-LED) technology introduced by Taiwanese companies: the technical threshold is appropriately lowered and the market feasibility is sought. -- However, the LCD backlight market is not a "long-term market." Under the general trend of liquid crystal to OLED transition, there is no "strategic future" for backlight products. The application of the micro LED in the backlight market can only serve as a short-term strategy, the first bucket of gold and an expedient to win opportunities for further innovation.

In other words, in the conventional display market, micro LEDs cannot avoid the frontal comparison with OLEDs. Under the OLED's initial investment, scale and maturity, the future of the micro LED camp is not optimistic. On the contrary, in the global engineering large-screen market, micro LEDs can move forward spontaneously without a rival and have a better future.

The author believes that the above analysis, AUO is more detailed, which constitutes AUO's "micro LED product type that competes directly with OLED and LCD", "that is, technology research and development", but "no mass production" The attitude of the timetable. On the other hand, in 2018, COB-LED large-screen products are at the forefront, and the introduction of more advanced technologies such as micro LEDs coincides with the fact that micro LEDs are the first to land in the engineering large-screen market.

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