International Display Workshops General Incorporated Association

Proceedings of the International Display Workshops Volume 27 (IDW '20)

Proceedings of the International Display Workshops Volume 27 (IDW '20)

Dec 9, 2020 - Dec 11, 2020
Virtual Conference

9:25 AM - 9:50 AM

[AMD4-2(Invited)] MicroLED Display with LTPS Backplane using Novel Driving Circuit and Optical Outcoupling Structure

*Kunio Imaizumi1, Masaya Tamaki1, Katsumi Aoki1, Ryoichi Yokoyama1, Hiroaki Ito1, Sho Nakamitsu1, Katsumi Yamanoguchi1, Masahiko Nishide1, Fanny Rahadian1, Seiji Matsuda1, Erwin Lang2, Lutz Hoeppel2 (1. Kyocera Corporation (Japan), 2. OSRAM Opto Semiconductors GmbH (Germany))

micro light emitting diode (microLED), low temperature poly-Si (LTPS) , thin film transistor (TFT) active matrix display, pulse width modulation (PWM) driving, current driving

https://doi.org/10.36463/idw.2020.0184

A 3.9” microLED display prototype with LTPS backplanes has been developed by using a newly-designed current and PWM hybrid driving technology to lower the color shift, resulting in achieving a higher frame rate. A novel approach for a reflector cavity process for improving outcoupling efficiency was also proposed.