TY - JOUR
T1 - A novel 3-TFT voltage driving method of compensating VTH shift for a-Si:H TFT and OLED degradation for AMOLED
AU - Lin, Chih Lung
AU - Chou, Kuan Wen
AU - Chang, Fu Chieh
AU - Hung, Chia Che
N1 - Funding Information:
The work was supported by the Advanced Optoelectronic Technology Center, National Cheng Kung University, under Projects from the Ministry of Education and the National Science Council (NSC 99-2221-E-006-194-) of Taiwan. AU Optronics Corporation, Hsinchu, Taiwan, ROC, is also appreciated for its technical support.
PY - 2011/10
Y1 - 2011/10
N2 - This work demonstrates the feasibility of a novel pixel circuit by using three a-Si:H TFTs. The proposed circuit can stabilize the OLED current and provide an additional driving current to ameliorate the brightness degradation of the AMOLED. Measurement results indicate that the current degradation of the proposed circuit, caused by VTH variations, is less than 5% over more than 50,000 s at 60 °C, whereas that of a conventional 2T1C pixel circuit is larger than 34%. Furthermore, to ameliorate the decrease in luminance owing to the OLED degradation, the OLED current can be increased by 10% by analyzing the current degradation and modulating the detected voltage appropriately.
AB - This work demonstrates the feasibility of a novel pixel circuit by using three a-Si:H TFTs. The proposed circuit can stabilize the OLED current and provide an additional driving current to ameliorate the brightness degradation of the AMOLED. Measurement results indicate that the current degradation of the proposed circuit, caused by VTH variations, is less than 5% over more than 50,000 s at 60 °C, whereas that of a conventional 2T1C pixel circuit is larger than 34%. Furthermore, to ameliorate the decrease in luminance owing to the OLED degradation, the OLED current can be increased by 10% by analyzing the current degradation and modulating the detected voltage appropriately.
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U2 - 10.1016/j.sse.2011.07.005
DO - 10.1016/j.sse.2011.07.005
M3 - Article
AN - SCOPUS:80054922546
VL - 64
SP - 10
EP - 13
JO - Solid-State Electronics
JF - Solid-State Electronics
SN - 0038-1101
IS - 1
ER -