CUED Publications database

Fast voltage-programmed pixel architecture for AMOLED displays

Bagheri, M and Ashtiani, SJ and Nathan, AN (2010) Fast voltage-programmed pixel architecture for AMOLED displays. IEEE/OSA Journal of Display Technology, 6. pp. 191-195. ISSN 1551-319X

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Abstract

We present a fast voltage programming scheme for active-matrix organic light-emitting diode (AMOLED) displays using amorphous silicon (a-Si) thin-film transistor (TFT) backplane technology. The proposed scheme uses on-pixel measurement of the threshold voltage (V th ) of the drive TFT. In contrast to the conventional voltage driving, V th is not measured by discharging a capacitor through a diode-connected TFT. Thus, the accuracy-speed tradeoff does not limit the performance of the new driving scheme. A 4-TFT 2-capacitor pixel circuit is implemented based on the new driving scheme, and its performance is verified by circuit-level simulations using AIM-SPICE. Simulation results show that for a programming time of 33 μs , less than 2.5% change in the OLED current can be achieved for a 5-V shift in the threshold voltage of the drive TFT. © 2006 IEEE.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:07
Last Modified: 29 Aug 2017 01:17
DOI: