TY - GEN
T1 - Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays
AU - Hsu, Chih Cheng
AU - Lu, Chun Ming
AU - Lai, Po Chun
AU - Chen, Po Syun
AU - Lin, Chih Lung
N1 - Funding Information:
This work was supported in part by the Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan, and the Ministry of Science and Technology of Taiwan under Projects of MOST 105-2218-E-006-009 and MOST 105-2622-E-006-033-CC2, as well as AU Optronics Corporation is appreciated for its technical and funding support
PY - 2017/8/8
Y1 - 2017/8/8
N2 - This work proposes a new pixel circuit of low-Temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance voltage drop in power line (I-R drop). Moreover, the proposed pixel circuit can avoid flicker and extend compensation time. The simulation results demonstrate that the relative current error rates are less than 5% and 1% as the variations of threshold voltage and I-R drop are ±0.5 V and -0.5 V, respectively.
AB - This work proposes a new pixel circuit of low-Temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance voltage drop in power line (I-R drop). Moreover, the proposed pixel circuit can avoid flicker and extend compensation time. The simulation results demonstrate that the relative current error rates are less than 5% and 1% as the variations of threshold voltage and I-R drop are ±0.5 V and -0.5 V, respectively.
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M3 - Conference contribution
AN - SCOPUS:85034454464
T3 - AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings
SP - 147
EP - 150
BT - AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017
Y2 - 4 July 2017 through 7 July 2017
ER -