Title
5-3: Distinguished Paper: Power Saving through State Retention in IGZO-TFT AMOLED Displays for Wearable Applications
Author
Steudel, S.
van der Steen, J.L.
Nag, M.
Ke, T.H.
Smout, S.
Bel, T.
van Diesen, K.
de Haas, G.
Maas, J.
de Riet, J.
Rovers, M.
Verbeek, R.
Huang, Y.Y.
Chiang, S.C.
Ameys, M.
de Roose, F.
Dehaene, W.
Genoe, J.
Heremans, P.
Gelinck, G.
Kronemeijer, A.J.
Publication year
2017
Abstract
We present a qHD (960x540 with 3 sub-pixels) top-emitting AMOLED display with 340ppi resolution using a self-aligned (SA) IGZO TFT backplane on polyimide-foil with humidity barrier. The back plane process flow is based on a 7 layer photolithography process with a CD=4um. We implement a 2T1C pixel engine and use commercial source driver IC made for LTPS. By using IGZO TFT and leveraging the extremely low off-current, we can switch-off the power to the source and gate driver while maintaining the image un-changed for several minutes. We demonstrate that, depending on the image content, low-refresh operation yields reduction in power consumption of up to 50% compared to normal (continuous) operation. We show that with further increase in resolution, the power saving through state retention will be even more significant.
Subject
Nano Technology
HOL - Holst
TS - Technical Sciences
Electronics
Industrial Innovation
Flexible displays
AMOLED
Metal-oxide semiconductors
Self-aligned TFT
State retention
To reference this document use:
http://resolver.tudelft.nl/uuid:5de4a87a-6751-4b12-aa75-42bb603d2647
DOI
https://doi.org/10.1002/sdtp.11575
TNO identifier
780625
Publisher
Wiley-Blackwell Publishing Ltd
Source
SID Symposium Digest of Technical Papers, 48 (1), 38-41
Document type
conference paper