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2018•Unpublished venueRequires access

An a-IGZO TFT Pixel Circuit for AMOLED Display Systems With Compensation for Mobility and Threshold Voltage Variations

Shuiping Yi, Xinxin Huo, Congwei Liao, Ying Wang, Jixiang Wu, Hailong Jiao, Min Zhang, Shengdong Zhang

Open publisher page 8 citations

Abstract

A voltage-programmed a-IGZO TFT pixel circuit for AMOLED display systems is proposed in this paper. Compensation schemes together with a simple driving strategy are proposed for threshold voltage shift and mobility variations of the driving TFT, as well as the OLED degradation. Simulation results indicate that the current error rates (CERs) are reduced to lower than 11.9% when the mobility variation of the driving TFT is ±30%, and 8.1% when the threshold voltage shift of the driving TFT is ±0.5 V, for the entire data input range.

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What this paper is about

A voltage-programmed a-IGZO TFT pixel circuit for AMOLED display systems is proposed in this paper. Compensation schemes together with a simple driving strategy are proposed for threshold voltage shift and mobility variations of the driving TFT, as well as the OLED degradation. Simulation results indicate that the current error rates (CERs) are reduced to lower than 11.9% when the mobility variation of the driving TFT is ±30%, and 8.1% when the threshold voltage shift of the driving TFT is ±0.5 V, for the entire data input range.

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OpenAlex reports 8 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

A voltage-programmed a-IGZO TFT pixel circuit for AMOLED display systems is proposed in this paper. Compensation schemes together with a simple driving strategy are proposed for threshold voltage shift and mobility variations of the driving TFT, as well as the OLED degradation. Simulation results indicate that the current error rates (CERs) are reduced to lower than 11.9% when the mobility variation of the driving TFT is ±30%, and 8.1% when the threshold voltage shift of the driving TFT is ±0.5 V, for the entire data input range.

Key concepts: AMOLED, Thin-film transistor, Threshold voltage, OLED, Compensation (psychology), Voltage, Materials science, Pixel

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