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This paper will explain recent progress of WOLED for OLED TV which has been made by introducing an additional blue unit to conventional 2-stack tandem WOLED consisting of blue and yellow green (YG) devices. The addition of the blue unit not only boosts blue subpixel efficiency, but also makes the correlated color temperature of WOLED increase, resulting in more energyefficient OLED TV. How the detailed architecture in the 3-stack WOLED is determined will be described, in consideration of color shift dependent on a viewing angle. [ABSTRACT FROM AUTHOR]

Ultra-high definition (UHD) curved organic light-emitting diode (OLED) TV requires advanced technologies to realize mass production. White, red, green, and blue (WRGB) OLED TV based on stripe WRGB sub-pixel structure has distinct advantages in luminance of white, faster response time, wider viewing angle, and potential higher resolution. In this paper, we will introduce technological progress for commercializing large-sized and UHD curved OLED TV. Those technologies including oxide thin film transistors, white OLEDs, compensation circuit, and solid phase encapsulation enable panel size scalability as well as mass production with lifetime reliability. [ABSTRACT FROM AUTHOR]

Abstract: Thin silver film is widely used as the cathode in organic light-emitting diode displays and it is generally fabricated using the thermal evaporation method. But during the evaporation process, there is an inevitable outgassing problem and this creates high viscosity bubbles in melted silver. When the bubbles break, the high energy released scatters silver droplets which damage the silver surface. In this study, we were able to decrease the number of droplets from 6,171 to 278 with a degassing process of 400 °C for 6 h before proceeding with a thermal evaporation process. [Copyright &y& Elsevier]