基于低温多晶硅和氧化物薄膜晶体管的新型低帧率补偿像素电路，用于高像素密度便携式有源矩阵有机发光二极管显示器。

New Low-Frame-Rate Compensating Pixel Circuit Based on Low-Temperature Poly-Si and Oxide TFTs for High-Pixel-Density Portable AMOLED Displays.

作者信息

Fan Ching-Lin, Lin Wei-Yu, Chen Chun-Yuan

机构信息

Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Da'an Dist., Taipei City 106, Taiwan.

Department of Electronic and Computer Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Da'an Dist., Taipei City 106, Taiwan.

出版信息

Micromachines (Basel). 2021 Dec 5;12(12):1514. doi: 10.3390/mi12121514.

DOI:10.3390/mi12121514

PMID:34945364

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8705292/

Abstract

A new low-frame-rate active-matrix organic light-emitting diode (AMOLED) pixel circuit with low-temperature poly-Si and oxide (LTPO) thin-film transistors (TFTs) for portable displays with high pixel density is reported. The proposed pixel circuit has the excellent ability to compensate for the threshold voltage variation of the driving TFT (ΔV). By the results of simulation based on a fabricated LTPS TFT and a-IZTO TFT, we found that the error rates of the OLED current were all lower than 2.71% over the range of input data voltages when ΔV = ±0.33 V, and a low frame rate of 1 Hz could be achieved with no flicker phenomenon. Moreover, with only one capacitor and two signal lines in the pixel circuit, a high pixel density and narrow bezel are expected to be realized. We revealed that the proposed 7T1C pixel circuit with low driving voltage and low frame rate is suitable for portable displays.

摘要

报道了一种用于高像素密度便携式显示器的新型低帧率有源矩阵有机发光二极管（AMOLED）像素电路，该电路采用低温多晶硅和氧化物（LTPO）薄膜晶体管（TFT）。所提出的像素电路具有出色的能力来补偿驱动TFT的阈值电压变化（ΔV）。通过基于制造的低温多晶硅TFT和非晶铟锌锡氧化物（a-IZTO）TFT的模拟结果，我们发现当ΔV = ±0.33 V时，在输入数据电压范围内，OLED电流的误差率均低于2.71%，并且可以实现1 Hz的低帧率且无闪烁现象。此外，由于像素电路中仅具有一个电容器和两条信号线，有望实现高像素密度和窄边框。我们揭示了所提出的具有低驱动电压和低帧率的7T1C像素电路适用于便携式显示器。