The latest news: LG and Samsung will invest in the construction of a “printed OLED†panel demonstration line in 2017. If this plan is implemented, it will be a key step for OLED to mass popularization ... But wait a minute! Why is there a new thing called "printed OLED"? Is this a new display technology? Over the past 5 years, the OLED “coming soon†declaration has heard ears grow! Can we still believe the news this time? And with the new technology, how to deal with the original production line and the production line currently under construction? There are too many questions! However, let ’s first take a look at what the latest news says: According to Korean media reports, Samsung Display and LG Display are planning to cooperate with Kateeva, Tokyo Electron and other equipment factories, and Merck (Merck), Idemitsu Kosan (Idemitsu Kosan) and other material manufacturers cooperated to introduce inkjet printing processes on the A3 and M2 production lines. The timetable is 2017. Among them, Samsung A3 production line is the 6th generation line, the target product is flexible OLED, the scale is to invest 15,000 substrates per month; LG M2 line is the 8.5 generation line, the target product is rigid OLED, the current technology is white light oled + color filter film, full-frame steaming The scale is 26,000 per month. Samsung A3 is the world's first purely flexible OLED line, focusing on small and medium-sized applications such as mobile phones and RGB oled products; LG M2 is the world's first large-scale OLED mass production line, focusing on large-scale applications such as TV. ——These two lines are currently the most advanced flat panel display panel production lines! According to media reports, Mitsubishi Chemical has provided several potential users with "OLED material" samples for inkjet printing in the first half of this year; domestic TCL-led Juhua Printing has also signed printing display material products with Merck and Germany Cooperation agreement. In summary, it seems that "printing" + "OLED" has become the "core direction" of the progress of the new next-generation flat panel display technology in the first half of the year. However, I believe many people have a question: Now that there are large-to-small OLED mass production technologies, why is printing technology still so popular? There are four reasons for this: First, printing is a low-cost method. Just the OLED material itself, the printing process can save 90% compared to the current steaming process. Secondly, although the steaming process solves the entire steaming problem from the 3rd generation line to the 8.5th generation line, it fails to realize the RGB three primary colors and triple steaming on a large size. The existing 8.5-generation line steaming process, when used in the manufacture of RGB OLED three-primary color panels, the yield rate has dropped significantly. Third, the effects of steaming and inkjet printing on the life characteristics of OLED materials are significantly different. The latter is beneficial to long-life OLED display products. Lifetime is very important for large size applications. Fourth, the current trend of the panel industry is to concentrate on large-size lines, that is, the new investment production line basically uses the 6th generation line as the starting standard, which makes the steam generation process of the lower generation line more conducive to the "upgrade" problem. The printing technology is more suitable for high-generation lines. Together, these reasons are enough to make printed OLEDs the trend of the times. However, the biggest bottleneck for printing OLEDs is the control of the differences between every tiny printed dot, as well as the research and development of equipment for the printing of extremely small sub-pixel units. The former is a key bottleneck for the entire printing display industry, while the latter is mainly a problem for small and medium-sized display products. ——In other words, for printed OLEDs, ink stability is not the ultimate problem, and device accuracy and stability are the real test. The latter can only be solved from the project after the establishment of an exemplary production line. "Solve the printing accuracy and process stability problems in specific engineering practices and under large-scale conditions"-this is the real bottleneck of OLED printing displays. This is also a problem that Samsung, LG, Juhua Printing and other companies are trying their best to solve. Is this problem easy to solve? Someone must ask. However, as a comparison, the problems encountered by the steaming technology in the manufacture of large-size OLED panels can also be summarized as "precision and process stability." In other words, printed OLED and steamed OLED, the core problem after large-scale is the same-who can win in the future, depends on which kind of technical route is easier to solve this problem. In other words, the hot OLED printing technology in 2016 can be understood as: the difficulty of steaming through large-size OLEDs is a bit beyond imagination, so everyone chooses another way-printing OLED to try. However, this also has a greater impact on color TV. For the OLEDization of mobile phones, whether there is printing technology or not will not change the process of industry popularization. "Don't be too happy"! Because of OLED, consumers have been released pigeons too many times. Since 2012, the promise of Samsung and LG's "OLED TV is here" has been repeatedly delayed. The reason for this is not that manufacturers do not work hard, but because of "too many choices", scattered energy, and greater technical difficulties. The combination of these factors has resulted in the constant rumors of "Samsung, LG". From a technical point of view, Samsung's earliest favorite route is "low temperature polysilicon, steaming, RGB OLED". However, the fact is that it is difficult to increase the size of low-temperature polysilicon TFTs, and it is not difficult to increase the size of the steaming process. It is almost impossible to achieve economical yields by RGB OLEDs. Later, Samsung also proposed "laser thermal transfer" printing OLED, but it was not finally successful. To be LG smart, it uses the route of metal oxide TFT + half width steaming + WOLED + color filter. This route bypassed some of the most difficult cuts, such as RGB technology, and was the first to introduce large-scale mass-produced products. From these technical analysis, you can see that the OLED road map is not easy: there are two major technical routes of low-temperature polysilicon and metal oxide on the TFT: the difference between the glass substrate and the flexible substrate; the OLED coating has half-width steaming and complete steaming At least four technologies of laser thermal transfer and inkjet printing; the final product selection also has two major differences between WOLED + color filter and RGB OLED. Therefore, the conclusion is that there are too many possible choices, which also increases the possibility of going in the wrong direction. This is the key "opportunity risk" for OLED's delay. If the entire industry and all power resources are concentrated on inkjet RGB OLED at the beginning, perhaps the entire industry process can be much faster. The best news for the next generation of flat panel displays in 2016-manufacturers finally really believe that "inkjet printing" is the most critical process point, even even electroluminescent QLED, the technology used by Samsung to "anti-OLED", Must be based on the "inkjet printing" process. Once the OLED, QLED display industry, this unprecedented consensus on "inkjet printing" is formed, then, the accelerated arrival of OLED will become possible. "Although the difficulties are greater", "the industry has unprecedented consensus" and common strengths, and over the years of industry efforts, OLED materials, OLED ink formulations, TFT process materials and other key links have been "quite mature." This is currently the biggest good news for the OLED industry. At this point, the article is basically over, but the first question needs to be answered: printed OLED is coming, what about the existing OLED line and the line under construction? First of all, the small and medium-sized lines do not have the need to introduce the printing process. The steaming is now used very well, and it is good to continue to use when it is completed; secondly, the production line under construction, only the LG 9th-generation line, This line will be mass-produced in 2018, that is, his technical roadmap can be determined after the M2 line test of printed OLEDs in 2017; third, other small and medium-sized lines under construction can be scientifically adjusted by reference to the demonstration results of LG and Samsung; Fourth, the difficulty of changing the printed OLED line through steaming OLED lines is not very big, mainly due to cost issues. Fifth, the large-scale OLED lines that have been mass-produced are only LG's M1 and M2, and the scale of the two lines is not large. The cost of transforming into a printing line is acceptable. Therefore, you do not need to worry too much about the impact of new technologies on existing OLED lines. Because OLED hasn't really gone far before, even if all go back and go again, it is not a big problem. Moreover, the share of steaming links in OLED panel equipment is less than 30%. Dresser Drawer Organizer,Silverware Drawer Organizer,Acrylic Drawer Organizer,Small Drawer Organizer ROYALWIND IMPORT&EXPORT CO.,LTD , https://www.hoombest.com
OLED panels can be printed out giants have praised