Applied System Innovation (Mar 2025)

Pixel Circuit Designs for Active Matrix Displays

  • Dan-Mei Wei,
  • Hua Zheng,
  • Chun-Hua Tan,
  • Shenghao Zhang,
  • Hua-Dan Li,
  • Lv Zhou,
  • Yuanrui Chen,
  • Chenchen Wei,
  • Miao Xu,
  • Lei Wang,
  • Wei-Jing Wu,
  • Honglong Ning,
  • Baohua Jia

DOI
https://doi.org/10.3390/asi8020046
Journal volume & issue
Vol. 8, no. 2
p. 46

Abstract

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Pixel circuits are key components of flat panel displays, including liquid crystal displays (LCDs), organic light-emitting diode displays (OLEDs), and micro light-emitting diode displays (micro-LEDs). Depending on the active layer material of the thin film transistor (TFT), pixel circuits are categorised into amorphous silicon (a-Si) technology, low-temperature polycrystalline silicon (LTPS) technology, metal oxide (MO) technology, and low-temperature polycrystalline silicon and oxide (LTPO) technology. In this review, we outline the fundamental display principles and four major TFT technologies, covering conventional single-gated TFTs to novel two-gated TFTs. We focus on novel pixel circuits for three glass-based display technologies with additional mention of pixel circuits for silicon-based OLED and silicon-based micro-LED.

Keywords