TY - JOUR
T1 - A novel voltage-feedback pixel circuit for AMOLED displays
AU - Lin, Chih Lung
AU - Tsai, Tsung Ting
AU - Chen, Yung Chih
N1 - Funding Information:
Manuscript received February 28, 2007; revised May 12, 2007. the This work was supported by the National Science Council of the Republic of China, Taiwan, under Contract NSC 95-2221-E-006-298. C.-L. Lin and T.-T. Tsai are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701-01, Taiwan, R.O.C. (e-mail: [email protected]). Y.-C. Chen was with is with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701-01, Taiwan, R.O.C.. He is now with AU Optronics Corporation, Hsinchu, Taiwan, R.O.C. Color versions of one or all figures are available online at http://ieeexplore. ieee.org. Digital Object Identifier 10.1109/JDT.2007.901555
PY - 2008/3
Y1 - 2008/3
N2 - This study presents a novel voltage-modulated pixel circuit for active-matrix organic light-emitting diode (AMOLED) consisting of five n-type thin-film transistors (TFTs), one additional control signal, and one storage capacitor. The proposed circuit, which can be implemented in all-n-type and all-p-type low temperature poly-silicon (LTPS) TFT technologies, successfully compensates for threshold voltage deviation of TFTs and facilitates correction of OLED degradation using a voltage feedback method. Simulation and experimental results for all-n-type TFTs indicate that the proposed pixel circuit reduced the nonuniformity brightness problem effectively by compensating for threshold voltage variation in TFTs and reduced the degradation of emission efficiency in OLEDs.
AB - This study presents a novel voltage-modulated pixel circuit for active-matrix organic light-emitting diode (AMOLED) consisting of five n-type thin-film transistors (TFTs), one additional control signal, and one storage capacitor. The proposed circuit, which can be implemented in all-n-type and all-p-type low temperature poly-silicon (LTPS) TFT technologies, successfully compensates for threshold voltage deviation of TFTs and facilitates correction of OLED degradation using a voltage feedback method. Simulation and experimental results for all-n-type TFTs indicate that the proposed pixel circuit reduced the nonuniformity brightness problem effectively by compensating for threshold voltage variation in TFTs and reduced the degradation of emission efficiency in OLEDs.
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U2 - 10.1109/JDT.2007.901555
DO - 10.1109/JDT.2007.901555
M3 - Article
AN - SCOPUS:43649105635
SN - 1551-319X
VL - 4
SP - 54
EP - 60
JO - IEEE/OSA Journal of Display Technology
JF - IEEE/OSA Journal of Display Technology
IS - 1
M1 - 4356475
ER -