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>> OLED panel printing out of OLED popular key step 27th,Apr,2017
LG and Samsung in 2017 to invest in the construction of "printed OLED" panel demonstration line. If this plan is implemented, it will be a key step towards large-scale adoption of OLEDs ...
But wait! Why is it out of a new thing called "printing OLED"? Is this a new display technology? Over the past five years, OLED "will come," the declaration has been heard ears long cocoon! Can we still believe this news? And with the new technology, the original production line, is now building the production line, how to deal with it?
Too much problem! (Samsung Display) and LG Display (LG Display) prepared with the Kateeva, Tokyo Electric (Tokyo Electron) and other equipment factory, according to the Korean media reports, and then we look at the latest news to say what: Merck, Idemitsu Kosan, and other materials, each in the A3 and M2 production line to introduce inkjet printing process. The timetable is 2017 years.
Among them, the Samsung A3 production line is 6 on behalf of the line, the target product is flexible OLED, the scale for the monthly input of 1.5 million; LG M2 line is 8.5 on behalf of the line, the target product rigid OLED, the current technology is white oled + color filter, Crossing, the scale of the base board for the 26,000. Samsung A3 is the world's first pure flexible OLED line, the main mobile phone and other small and medium size applications and RGB oled products; LG M2 is the world's first large-size OLED production line, the main TV and other large-size applications. - these two lines are the most advanced flat panel display panel production line!
According to media reports, Mitsubishi Chemical has in the first half of this year to several potential users with inkjet printing for the "OLED material" samples; domestic TCL-led poly-printing and the German Merck signed a printed display material products Cooperation agreement.
In summary, it seems that "printing" + "OLED" has become the first half of the year, the new generation of flat panel display technology progress "core direction." However, I believe many people have a question: now there have been from large to small OLED production technology, why printing technology is also so popular? In this regard, there are four reasons:
First, printing is a low cost way. Only the OLED material itself, using the printing process than the current steaming process to save 90%.
Secondly, the steaming process, although the solution from the 3 generation line to 8.5 on behalf of the line of the whole steam crossing the problem, but in large size can not achieve RGB three primary colors triple steam. The existing 8.5-generation line steaming process, in the RGB OLED three primary color panel manufacturing, the yield dropped significantly.
Third, the two effects of steaming and inkjet printing on the life characteristics of OLED material significantly different, which is conducive to longevity OLED display products. Life is very important for large-size applications.
Fourth, the current trend of the panel industry is to focus on large-scale line, that is, the new investment line to the basic 6-generation line as the starting standard, which makes more conducive to the low generation line of the steaming process, suffered a "upgrade" While the printing technology is more suitable for high-generation lines.
These reasons together, enough to make printing OLED become the trend of the times. However, the biggest bottleneck in printed OLEDs - the differential control between each tiny print point, and the development of equipment for minimal sub-pixel unit printing. The former is the printing press industry, the key bottleneck, the latter is mainly for small and medium size display products in terms of the problem. - or, for printed OLEDs, ink stability is not final
Big problem, equipment accuracy and stability is the real test. While the latter, it is necessary to establish an exemplary production line can be really resolved from the project out.
"To solve the specific engineering practice, large-scale conditions of the printing accuracy and process stability issues" - this is the current OLED printing display the real bottleneck. This is also Samsung, LG, Polyhua printing and other enterprises are under the greatest effort to solve the problem.
Is this problem solved? Certainly someone asked that. However, in contrast, the problems encountered in the manufacture of large-size OLED panels can be summarized as "accuracy and process stability". In other words, printing OLEDs and steaming OLEDs, after the big size of the core problem is consistent - the future who can win, depending on the kind of technical route easier to solve this problem.
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