TY - GEN
T1 - New Compensating Pixel Circuit to Mitigate Impact of Leakage Currents on OLED Currents for AMOLED Displays
AU - Shieh, Wen Yen
AU - Tsai, Chia Ling
AU - Chen, Bo Shu
AU - Lin, Chih Lung
N1 - Funding Information:
The work was supported by the Ministry of Science and Technology of Taiwan under Projects of MOST 110-2221-E-006-149-MY3 and AU Optronics Corporation is appreciated for its technical and funding support
Publisher Copyright:
© 2022 International Society of Functional Thin Film Materals & Devices (FTFMD).
PY - 2022
Y1 - 2022
N2 - This work presents a pixel circuit which consists a matching TFT to compensate for the threshold voltage (VTH) of the driving TFT for use in low-frame-rate displays. A leakage compensation scheme is proposed to alleviate the distortion of the OLED driving current caused by the large leakage currents of low-temperature polycrystalline silicon thin-film transistors (L TPS TFTs) in the prolonged emission time. Simulation results show that the relative current error rates over the entire data voltage range are all below 3.9% as the VTH of the driving TFT varies by ± 0.5 V. Moreover, the variations in the OLED driving current are significantly decreased, verifying the feasibility of applying the proposed circuit to low- frame-rate wearable displays.
AB - This work presents a pixel circuit which consists a matching TFT to compensate for the threshold voltage (VTH) of the driving TFT for use in low-frame-rate displays. A leakage compensation scheme is proposed to alleviate the distortion of the OLED driving current caused by the large leakage currents of low-temperature polycrystalline silicon thin-film transistors (L TPS TFTs) in the prolonged emission time. Simulation results show that the relative current error rates over the entire data voltage range are all below 3.9% as the VTH of the driving TFT varies by ± 0.5 V. Moreover, the variations in the OLED driving current are significantly decreased, verifying the feasibility of applying the proposed circuit to low- frame-rate wearable displays.
UR - http://www.scopus.com/inward/record.url?scp=85137820590&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85137820590&partnerID=8YFLogxK
U2 - 10.23919/AM-FPD54920.2022.9851259
DO - 10.23919/AM-FPD54920.2022.9851259
M3 - Conference contribution
AN - SCOPUS:85137820590
T3 - Proceedings of AM-FPD 2022 - 29th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials
SP - 95
EP - 98
BT - Proceedings of AM-FPD 2022 - 29th International Workshop on Active-Matrix Flatpanel Displays and Devices
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 29th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2022
Y2 - 5 July 2022 through 8 July 2022
ER -