The hottest inkjet printing is not a dream OLED pa

2022-10-16
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Inkjet printing is not a dream! OLED panel may achieve

by 2020. Since 2016, display technology has developed rapidly, including FMM evaporation and inkjet printing OLED technology has become a hot spot in the industry. The main difference between fine metal mask (FMM) evaporation and inkjet printing is the equipment and materials for manufacturing these organic layers. When FMM is used to manufacture these organic layers, a vacuum equipment is required. Solid materials are added to the device and then evaporated by heating. The evaporation source is painted on the surface of the substrate in a pixel pattern through a mask. However, the working principle of inkjet OLED is different. The basic principle is similar to that of inkjet printers commonly used in homes and offices. The main method of ink-jet printing is to melt OLED organic materials with solvent, and then spray the materials directly on the surface of the substrate to form R (red), G (green) and B. the furniture experimental machine must be used to detect (blue) organic light-emitting layer

The OLED printing process has the following advantages over the typical FMM (fine metal mask) process. Firstly, the process is simpler. Secondly, the evaporation efficiency of organic light-emitting materials is higher. Thirdly, it is more tolerant. 5. The experimental software under the all Chinese Windows platform is easy to handle large substrates, especially panels of gen8 and above. Finally, the manufacturing cost is lower. With these advantages, the printing process is mainly developed for large-size substrates, especially gen8 and above TV panels. However, the printing process also has some defects. In fact, the materials of the printed OLED process are not enough for large-scale production, but the goal of many industry participants is to develop a printing process that can be produced in large scale by 2018

Korean panel manufacturers are currently in a leading position in the research and development of OLED printing technology. The printing process is mainly for the replacement of large-size substrate evaporation. Since LG display is the only OLED TV panel manufacturer at present, it is particularly active in the research and development of OLED printing process

in fact, LG display has set up testing equipment for gen8 size OLED printing process on the Korean production line for research. However, since luminescent materials are still in the development stage, much work depends on the material manufacturer rather than the panel manufacturer. It seems that it will take more time to develop materials that can meet the required performance level of the display panel. After all, these two samples have passed the general degassing test standard based on the micro VCM experiment. Many manufacturers and even emerging manufacturers in China are developing printing processes for OLED production. However, considering the current technology, experience and material research and development status, it seems to take more time than panel manufacturers expect. Ihsmarkit believes that this goal will be achieved around 2020

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