Samsung Display's Large OLED Investment 'C Project' Coming soon As early as the middle of this month,
Lee Jong-joon Approval 2019.07.12 13:26
The implementation of the 'C project', an investment in Samsung Display's large-scale organic light emitting diode (OLED) production line for TVs, has entered the visible market. As soon as possible, it is expected to open investment decision committee in mid-month to decide investment. It is reported that discussions are underway on future concrete road road plans including Phase 1 investment (Phase 1) and Phase 2 investment (Phase 2).
A representative of the display industry said on December 12, "Samsung Display will open its investment decision by opening an investment deliberation committee on large OLED production lines in mid-month." We will announce it at the latest in August. " Chungcheongnam-si, Asan 1 campus L8 plant The turnaround of a part of the liquid crystal display (LCD) line into a large OLED production line is likely to be launched in 3Q11.
One of the large OLED core equipment, Japan's Canon Toki, is expected to be loaded early next year. An official of the industry who is very happy with Canon Torquy said, "The time of the request for the first equipment was fixed to February next year," and "the phase 2 import plan is the next year, February 2021". "Phase 1 and Phase 2, each one of the 8.5 generation (2200mm x 2500㎜) monthly 60,000, but it is expected to go up to 90,000 in the future," he said.
Another representative of the display equipment industry said, "It was scheduled for mass production in June next year." He also predicted that he would switch all the LCD production lines of the L8 line plant to 120,000. "First, turn the first line to coordinate," he said.
Overall, we expect to see a mid-year turnaround in 2H12, a 2H12 line-up in 1H12, and mass production in 2H12. "OLED technology experts say," Samsung has a long way to go with LG in large OLEDs, but compared to small OLEDs, large OLED technology is not that difficult, "he said. In May, Samsung Display made a request for equipment to Yasu, a key partner of LG Display.
Large OLED production technologies of Samsung Display and LG Display show a significant difference with quantum dot (QD) and light emitting structure. Samsung Display uses a top emission structure with a Quantum dot color conversion layer and LG Display produces a large OLED for TVs with a bottom emission structure without a Quantum dot color conversion layer. Quantum dot color conversion layer can increase color purity.
Samsung Display has been struggling to solve problems derived from its large OLED technology called QD-OLED, which has been used in quantum dot conversion layers and front emission structures. Since the color filter curing temperature is higher than the temperature that Quantum dot can tolerate, the color filter layer is first made and then the Quantum dot color conversion layer is raised. After the quantum dot color change layer is formed, the substrate is flipped over and bonded to the OLED light emitting layer (TFT).
Initially, the Quantum dot-color conversion layer was added to the photolithography process. Using a photoresist (PR) that could be used at low temperatures, the Quantum dot could not be brought up thicker when the quantum dot was raised. If the quantum dot is thin, the color conversion efficiency drops. Samsung Display is currently applying the inkjet printing process to the Quantum dot color conversion layer. During development, inkjet printing equipment from Katiba, USA was used.
Samsung Display has produced small and medium-sized OLEDs with full-color luminescence. The whole light emission is a method in which light is emitted in the direction opposite to the transistor (TFT), and the light efficiency is increased by resonating and amplifying the reflected light. The longer the optical distance from the front to the side, the shorter the amplification distance. At this time, the color changes somewhat depending on the viewing angle.
This phenomenon is not a big problem in a smartphone or a tablet / notebook display where most of the time is viewed from a short distance, but the viewing angle characteristic becomes important because the TV is not a front view device.
It is possible to scatter light in the display to reduce discoloration depending on the viewing angle. Samsung Display has devised a way to mix light scattering materials into Quantum dot. It is important to create a color conversion layer with a proper thickness even if you put a scarter.
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