Over last 20 years, the evolution of display has been occurred rapidly to change our life style. Nowadays we could get any information at any time and any place through various forms of displays such as smart phones, pads, laptops and TV sets. It would be interesting to see the displays are changing forms to fit into our life style and meet our interests or convenience. Transparent, rollable and foldable displays would be the typical example of the transition. To meet the speed of transition, many new technologies have been applied and no one would deny the OLED has been leading the change of display technology and contributing to the change of life style. Furthermore, the fact that the OLED could control its properties of light emitted from each pixel of display would be another change of display to the new application for healthcare. In this talk, I’d like to mainly touch the OLED technology, its merits and development direction
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