From AUO's website,
"...Meanwhile, AUO is also dedicated to the horizontal integration of technologies such as LCD, OLED, FED, E-paper, and oxide transistors. We believe that through constant technical and innovative brainstorming, we will definitely keep leading the world’s trends."
They have been working on OLED for years, but in 2010 bought the patent rights to FED:
"...The fast response time, high efficiency, brightness, and contrast of FED technology not only compare favorably with traditional CRT technology but also outperform in terms of image quality and power efficiency. FED technology will be focused on high-end display application for future development. Apart from OLED, FED technology will be a new application option in the flat display industry, which will become a strong support for AUO's unique competence in the future..."