CUED Publications database

Threshold Voltage Compensation Error in Voltage Programmed AMOLED Displays

Bagheri, M and Cheng, X and Zhang, J and Lee, S and Ashtiani, S and Nathan, A (2016) Threshold Voltage Compensation Error in Voltage Programmed AMOLED Displays. Journal of Display Technology, 12. pp. 658-664. ISSN 1551-319X

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© 2005-2012 IEEE. A new accurate voltage-programmed pixel circuit for active-matrix organic light-emitting diode (AMOLED) displays is presented. Composed of three TFTs and one storage capacitor, the proposed pixel circuit is implemented both in a-Si and a-IGZO TFT technologies for the same pixel size for fair comparison. The simulation result for the a-Si-based design shows that, during a programming time of {\hbox{90}}μ \hbox{s} , the pixel circuit was able to compensate for a 3 V threshold voltage (V \rm th ) shift of the drive TFT with almost no error. In contrast, the a-IGZO-based pixel circuit, has a larger current error (of around 8%), despite its proven three-fold higher speed.

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:14
Last Modified: 17 May 2018 05:56