International Display Workshops General Incorporated Association

Proceedings of the International Display Workshops Volume 26 (IDW '19)

Proceedings of the International Display Workshops Volume 26 (IDW '19)

Nov 27, 2019 - Nov 29, 2019
Sapporo Convention Center

1:40 PM - 2:00 PM

[MEET5-5L(Invited)] Comparison of LTPS, Oxide and LTPO TFTs for Micro-LED Displays

*Jin Jang1, Suihui Lee1, Hyo-min Kim1, Yuanfeng Chen1 (1. Advanced Display Research Center, Kyung Hee University (Korea))

Micro-LED, LTPS TFT, Oxide TFT, TFT Backplane

We review here the LTPS and oxide TFT technologies for micro-LED displays. We have developed BLA of a-Si for LTPS TFTs, exhibiting a high field-effect mobility over 150cm2/Vs for p-channel device. On theother hand, oxide TFTs using bulk-accumulation (BA) mode exhibits an effective field effect mbility over 50 cm2/Vs. The BLA TFT backplane was applied to drive a micro-LED displays using digital driving. Oxide TFT backplane was used for micro-LED with high contrast ratio. The LTPO technology and QD color conversion technology will be explained for micor-LED displays.