LTPS and oxide TFTs are being used for AMOLED displays. LTPO-TFT backplanes have become more popular recently because of their low power consumption and CMOS design. In this seminar, Jang will review the state-of-art technologies for oxide, LTPS, and LTPO TFTs for AMOLED displays. He will also talk about the future prospects of LTPO-TFT backplanes.