External compensation for high‐resolution active matrix organic light‐emitting diode displays. Issue 7 (8th March 2021)

• Record Type: Journal Article
• Authors: Verschueren, Lynn; Ameys, Marc; Velazquez Lopez, Mauricio; De Roose, Florian; Bonnifait, Mikaël; Smout, Steve; Ke, Tung Huei; Vandenplas, Erwin; Kronemeijer, Auke Jisk; Steudel, Soeren; Genoe, Jan; Dehaene, Wim; Myny, Kris
• Is Part Of: Journal of the Society for Information Display. Volume 29:Issue 7(2021)
• Page Start: 511
• Page End: 525
• Publication Date: 2021-03-08
• Subjects: AMOLED -- external compensation -- flexible displays -- uniformity -- variations -- VT shift; Information display systems -- Periodicals; 621.38154205
• DOI: 10.1002/jsid.992
• Languages: English
• ISSNs: 1071-0922

Abstract

Abstract: Two different external compensation methods for high‐resolution active matrix organic light‐emitting diode (AMOLED) displays are presented and compared. Both compensation methods are implemented using a small pixel circuit, namely, a 3T2C and a 2T1C pixel circuit, allowing high‐resolution displays. Due to the simple driving schemes, these methods allow fast driving, even for large displays. The characterization results show a significant improvement in current variation by implementing either of these methods. The VT compensation method using a 3T2C pixel circuit is able to reduce the current variation down to 0.56%, whereas the VT ‐ and β‐factor compensation method using a 2T1C pixel circuit demonstrates a further reduction in current variations down to 0.079%. This method also clearly shows significant improvement in optical variation between neighboring pixels. Abstract : Two different external compensation methods for high resolution AMOLED displays are presented and compared. Both compensation methods are implemented using a small pixel circuit, namely a 3T2C and a 2T1C pixel circuit, allowing high‐resolution displays. The characterization results show a significant improvement in current variation by implementing either of these methods.