TY - GEN
T1 - New Pixel Circuit with Negative Feedback Scheme for AMOLED Smartwatch Displays
AU - Chang, Jui Hung
AU - Shih, Li Wei
AU - Lin, Chih Lung
N1 - Publisher Copyright:
© 2021 FTFMD
PY - 2021
Y1 - 2021
N2 - This paper proposes a new p-type LTPS TFT pixel circuit for use in AMOLED smartwatch applications with a frame rate of 15 Hz. By adopting the negative feedback scheme, the voltage distortion at the gate node of the driving TFT is greatly ameliorated. The HSPICE simulation demonstrates that the relative current error rates caused by ±0.5 V V T H variations of TFTs are all suppressed below 4.8%. Moreover, the distortions of OLED currents during the long emission period of 66.67 ms are only 2.58 nA at the low gray level when the pixel circuit is operated at a frame rate of 15 Hz.
AB - This paper proposes a new p-type LTPS TFT pixel circuit for use in AMOLED smartwatch applications with a frame rate of 15 Hz. By adopting the negative feedback scheme, the voltage distortion at the gate node of the driving TFT is greatly ameliorated. The HSPICE simulation demonstrates that the relative current error rates caused by ±0.5 V V T H variations of TFTs are all suppressed below 4.8%. Moreover, the distortions of OLED currents during the long emission period of 66.67 ms are only 2.58 nA at the low gray level when the pixel circuit is operated at a frame rate of 15 Hz.
UR - http://www.scopus.com/inward/record.url?scp=85125769405&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85125769405&partnerID=8YFLogxK
U2 - 10.23919/am-fpd52126.2021.9499132
DO - 10.23919/am-fpd52126.2021.9499132
M3 - Conference contribution
AN - SCOPUS:85125769405
T3 - Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials
SP - 129
EP - 132
BT - Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2021
Y2 - 29 June 2021 through 2 July 2021
ER -