55.2: Ink‐Jet Printed AMOLED Displays Based on High Mobility IGZO TFTs: Cost Does Matter!

Abstract

AMOLED displays based on metal oxide film as active channel layer are fabricated. To achieve cost‐competitive process in OLED manufacturing, solution‐processed HIL, HTL and pixilated EML (RGB) layers followed by evaporation process for other layers are demonstrated in this work. Meanwhile, the AMOLED backplanes possessing low power consumption and high frequency were fabricated on metal oxide TFTs with high mobility (23.13 cm2/Vs) technology. A 14” qHD AMOLED in 79 ppi‐resolution was realized with IGZO based active matrix panel.

P‐168: Picture Quality and Uniformity Study on High Resolution Top Emission OLED Display Fabricated by Ink Jet Printing Process

“…For the material development, the solutionprocessable OLED material performance has reached the product level [1][2]. For the panel development, the panel size of a 14-inch and the 65-inch panel were produced by the IJP process [3][4]. For the middle size application, it has been demonstrated that it is possible to produce high resolution displays by IJP [5].…”

71‐4: Uniformity Study on High Resolution OLED Display Fabricated by Ink Jet Printing Process

“…The inkjet printing (IJP) process based on solution-processable OLED materials is a very attractive technology because it has a high material usage rate, which allows the process to bring down the material costs for large-size panel fabrication. C. L. Chen et al [1] and P. Y. Chen et al [2] demonstrated good OLED performances in a 14-inch and 65-inch panel produced by the IJP process using oxide thin film transistors (oxide-TFTs) as the backplane. For the media size application, P. Y. Chen et al [3] demonstrated that it is possible to produce high resolution displays despite the limitations in the IJP technique.…”

51.1: Amorphous Indium‐Gallium‐Zinc‐Tin‐Oxide TFTs with High Mobility and Reliability

“…AU Optronics developed high-mobility a-IGZO and a-ITZO backplanes. The latter exhibited an even higher mobility of 33.2 cm 2 /Vs [3,6].…”

“…Active matrix displays addressed by a-IGZO TFTs have been demonstrated for LCDs [2] and OLEDs [3]. However, although a-IGZO has a filed effect mobility ( FE ) of ~10 cm 2 /Vs [4], about 10 times larger than that of a-Si, it is insufficient to drive ultra-high definition and high frame rate displays.…”