Microled is attracting more and more attention. So far, startups have raised more than $800 million, including at least $100 million in 2019. It is estimated that,Apple has spent between $1.5 billion and $2 billion on this technology over the past five years. Panel manufacturers such as Samsung display, LG display, AUO and Innolux have also significantly increased their investment.
Against the background of this trend, yole D é veloppement (yole) put forward a new report entitled “microled industry”. “There is no doubt that microled has made progress in all aspects.” Dr. Eric virey, chief analyst of yole display market and technology, announced that in his new report, he revealed the current situation and adoption of the technology.
The report shows that the patent application of microled is increasing exponentially and the technology is also improving. In the past 24 months, the external quantum efficiency of blue-green microled chips has more than doubled. The performance of some transfer and assembly processes is close to that required to achieve some microled consumer applications. The expansion of prototypes demonstrated by nearly 20 companies in the past 18 months has also made significant progress.
Dr. zine bouhamri, yol technology and market analyst and display department, explained: “the scope of display is very wide, including various display types, sizes and technologies. The native RGB or color conversion display on TFT backplane is provided by many companies, including playnitride, csot, Samsung, LG and GL ō、 AUO, elux, Kyocera, etc. lumiode has developed native RGB or color conversion displays on a single function integrated LTPS. “
The micro display on the CMOS backplane is also controlled by Plessey and GL ō、 Lumens, JB display, sharp and ostendo show that x-display has developed discrete micro driver IC. Multiple prototypes based on TFT backplanes have led to the belief that microled displays can take advantage of the capabilities of existing panel manufacturers, thereby simplifying the production and supply chain.
Equipment manufacturers have noticed and begun to develop microled special tools for assembly, bonding, inspection, testing and repair.
LED manufacturers also showed interest. San’an plans to invest US $1.8 billion to establish a mini and micro LED manufacturing base. OSRAM, Seoul semiconductor, Nichia or lumiled are also increasing activities, and playnitride is completing its first microled test line.
However, there are still important obstacles for critical applications. For many of them, economics pushed the die size requirement to 10 μ M below, which combines the challenges of efficiency, transfer and manufacturability. Despite great improvements, the efficiency of small molds is still very low. In most cases, the display efficiency based on this technology is still not compared with OLED. Therefore, we need to make great efforts to further improve the internal quantum efficiency, light extraction and beam shaping of green and red microled chips.
For microled, the first few prototypes provide a strong return on experience, but mature consumer displays may need more products. Startups are entering the valley of death: many companies may not be able to raise enough capital to successfully survive this capital and resource intensive stage. As a strategic investor or development partner, support and partnership with large display manufacturers or OEMs are very important.
Source: yole D é veloppement
Compiled by: Nanshan

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