JSR develops quantum dot ink for Samsung Quantum Dot Display
By Lee Jong-joon Approval 2020.01.12 17:58
Competitive with Samsung SDI until the second half of this year
It was confirmed on January 10 that Japanese material company JSR is developing quantum dot ink for supplying Samsung quantum dot display production line. It is expected to compete with Samsung SDI, a Samsung-based subsidiary. A domestic material company official said, "Suppliers will be selected later this year."
Samsung Display began ordering equipment related to the quantum dot display production line at the end of last year. The company plans to finish the equipment setup in the second half of this year and start production lines next year. An inkjet printing process was applied to form a quantum dot light conversion layer for color filters.
Samsung Display will make a quantum dot display by laminating the quantum dot (QD) light conversion layer color filter substrate and the blue OLED substrate.
A photo process is used to raise the color pigment for color filters. Color photoresist (PR) mixed with pigment is applied onto the substrate and left in the desired position through photo process such as exposure, development and cleaning. The oven is then heated and hardened. JSR and Samsung SDI are both color photoresist producers.
Quantum dot display manufacturing uses a color filter with an additional quantum dot light conversion layer. Quantum Dot's light emitting (PL) technology is applied. Each of the red and green quantum dots receives light from the blue OLED and emits red and green with high color purity. Increasing the color purity of individual pixels widens the entire color gamut of the display.
The quantum dot light conversion layer is formed using an inkjet printing process rather than a photo process. Quantum dot ink is dropped on each color filter and then cured with ultraviolet (UV) light. Quantum Dot is developed by Samsung Advanced Institute of Technology and mass produced by Hansol Chemical. Quantum dot ink makers take quantum dots and turn them into inks.
Samsung SDI said it is developing QD ink at the 3Q earnings conference call. At the time, Kim Kyung-hoon, executive director of Samsung SDI's Electronic Materials Division, said, "We are developing QD ink, anti-reflective film and low refractive material for QD-OLED TV." Kim described quantum dot display as 'QD-OLED'.
Samsung Display is said to have exhibited 65-inch quantum dot display in a private booth during CES2020 at the US Electronics Show. An official from Samsung Display said, "It is another thing to make a product in a mass production facility, but there is no problem in quantum dot display at the current R & D facility."
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