A three-transistor pixel circuit to compensate for threshold voltage variations of LTPS TFTs for AMOLED displays

Chih Lung Lin; Po Syun Chen; Mao Hsun Cheng; Yen Ting Liu; Fu Hsing Chen

doi:10.1109/JDT.2014.2383434

A three-transistor pixel circuit to compensate for threshold voltage variations of LTPS TFTs for AMOLED displays

Chih Lung Lin, Po Syun Chen, Mao Hsun Cheng, Yen Ting Liu, Fu Hsing Chen

電機工程學系

研究成果: Article › 同行評審

16 引文斯高帕斯（Scopus）

摘要

This work presents a new pixel circuit adopting low-temperature polycrystalline-silicon thin-film transistors (LTPS TFTs) for active-matrix organic light-emitting diode (AMOLED) displays. The proposed pixel circuit can compensate for the threshold voltage variations of the LTPS TFTs with a simple structure. Simulated results demonstrate that the OLED currents over the entire data voltage range are uniform for 0.5 V variations in the threshold voltage of the driving TFT, unlike in a conventional circuit. Furthermore, the relative current error rates for parasitic loads in the 1280 ×720 resolution AMOLED display are less than 6%.

原文	English
文章編號	6990482
頁（從 - 到）	146-148
頁數	3
期刊	IEEE/OSA Journal of Display Technology
卷	11
發行號	2
DOIs	https://doi.org/10.1109/JDT.2014.2383434
出版狀態	Published - 2015 2月 1

All Science Journal Classification (ASJC) codes

電子、光磁材料
凝聚態物理學
電氣與電子工程

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10.1109/JDT.2014.2383434

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abstract = "This work presents a new pixel circuit adopting low-temperature polycrystalline-silicon thin-film transistors (LTPS TFTs) for active-matrix organic light-emitting diode (AMOLED) displays. The proposed pixel circuit can compensate for the threshold voltage variations of the LTPS TFTs with a simple structure. Simulated results demonstrate that the OLED currents over the entire data voltage range are uniform for 0.5 V variations in the threshold voltage of the driving TFT, unlike in a conventional circuit. Furthermore, the relative current error rates for parasitic loads in the 1280 ×720 resolution AMOLED display are less than 6%.",

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AU - Chen, Fu Hsing

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N2 - This work presents a new pixel circuit adopting low-temperature polycrystalline-silicon thin-film transistors (LTPS TFTs) for active-matrix organic light-emitting diode (AMOLED) displays. The proposed pixel circuit can compensate for the threshold voltage variations of the LTPS TFTs with a simple structure. Simulated results demonstrate that the OLED currents over the entire data voltage range are uniform for 0.5 V variations in the threshold voltage of the driving TFT, unlike in a conventional circuit. Furthermore, the relative current error rates for parasitic loads in the 1280 ×720 resolution AMOLED display are less than 6%.

AB - This work presents a new pixel circuit adopting low-temperature polycrystalline-silicon thin-film transistors (LTPS TFTs) for active-matrix organic light-emitting diode (AMOLED) displays. The proposed pixel circuit can compensate for the threshold voltage variations of the LTPS TFTs with a simple structure. Simulated results demonstrate that the OLED currents over the entire data voltage range are uniform for 0.5 V variations in the threshold voltage of the driving TFT, unlike in a conventional circuit. Furthermore, the relative current error rates for parasitic loads in the 1280 ×720 resolution AMOLED display are less than 6%.

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A three-transistor pixel circuit to compensate for threshold voltage variations of LTPS TFTs for AMOLED displays

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