LG discovers laser treatment to fix dead OLED pixels
KoreanIT News wrote up a story that LG Display found a way to fix dead pixels on OLED displays with the use of a laser beam. The article also talks about other advancements that will help uplift adoption of OLED technology.
LG Display also developed various technologies that can reduce costs, thereby accelerating the opening of the OLED TV market. The company will apply the atomic layer deposition, not the 2-partition deposition starting with the M2 line. It reduced not only costs but also process time. As the atomic layer deposition was applied, it is now possible to produce large premium TV panels. LG Display also developed the technology for using a laser beam to revive dead pixels, improving the yield. It is also attracting our attention.
The flexible display process is also making a progress. Samsung Display has had the biggest difficulty with the encapsulation process over the years. Ordinary OLED used glass encapsulation, but flexible displays with plastic substrates cannot use glass encapsulation. So the Vitex method, i.e. putting inorganic matters and organic matters alternately, has been used. This method has had a problem, i.e. the process time is too long, but Samsung Display succeeded in reducing the number of layers from 7 to 3. To reduce the number of layers to three, the company is known to have changed the material of the inorganic layer from ceramide to nitride. Ceramide, a ceramic material, had a problem, i.e. it easily develops cracks, but this problem was resolved as the material was changed. “We cannot disclose details of the technology,” said a Samsung Display insider. “We are trying our best to innovate productivity.”
“Not only each process has factors lowering the yield, but also there are many risk factors going over to the next process. So it is true that companies are having a great deal of difficulties,” said Prof. Moon Dae-gyu, Soonchunhyang University. “However, as the OLED TV had a very low yield in the early stage, if the flexible OLED gets over this hump well, the yield will be improved continuously.”
