Driving scheme for stable operation of 2-TFT a-Si AMOLED pixel

TitleDriving scheme for stable operation of 2-TFT a-Si AMOLED pixel
Publication TypeJournal Article
Year of Publication2005
AuthorsChaji, G. R., P. Servati, and A. Nathan
JournalElectronics Letters
Volume41
Pagination499 - 500
Date Publishedapr.
ISSN0013-5194
Keywords2-TFT a-Si AMOLED pixel circuit, active matrix organic light emitting diode displays, amorphous semiconductors, amorphous silicon thin film transistor backplane, driver circuits, driving scheme, elemental semiconductors, LED displays, mechanical stress tolerance, organic light emitting diodes, Si, silicon, spatial mismatch tolerance, stable operation, temperature variation tolerance, thin film transistors, threshold voltage shift, voltage-programmed pixel
Abstract

The amorphous silicon (a-Si) thin film transistor (TFT) backplane is becoming the technology of choice for active matrix organic light emitting diode (AMOLED) displays in view of its industrial accessibility and low fabrication cost over large area. However, the a-Si TFT suffers from threshold voltage (VT) shift. Presented is the simplest voltage-programmed pixel with an ability to compensate for the VT-shift in the drive TFT of the AMOLED pixel circuit. Simulation results also show that the pixel circuit can tolerate the spatial mismatch, temperature variation, and mechanical stress.

URLhttp://dx.doi.org/10.1049/el:20058209
DOI10.1049/el:20058209

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