Alternating current electroluminescence (ACEL) has great potential in flexible displays, especially in textile displays. However, since ACEL needs high-frequency, high-voltage AC signal to drive, there remains no driving scheme for pixelated ACEL display to achieve multiple gray scales. In this work, a driving scheme based on full-bridge inverters is proposed for passive-matrix ACEL (PMACEL) display, which achieves multiple gray scales by changing the duty cycle of the square wave. A single-pixel ACEL displaying 16 gray levels (4 bits) and a 5 × 8 fabric PMACEL displaying eight gray levels are demonstrated, enabling flexible ACEL devices to exhibit more vivid tones on a fabric substrate.

中文翻译：

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无源矩阵交流电致发光显示多灰度驱动系统

交流电致发光（ACEL）在柔性显示器，特别是纺织品显示器中具有巨大潜力。然而，由于ACEL需要高频、高压的交流信号来驱动，因此像素化ACEL显示器目前还没有实现多灰阶的驱动方案。在这项工作中，提出了一种基于全桥逆变器的无源矩阵ACEL（PMACEL）显示驱动方案，该方案通过改变方波的占空比来实现多个灰度级。演示了显示 16 灰度级（4 位）的单像素 ACEL 和显示 8 灰度级的 5 × 8 织物 PMACEL，使灵活的 ACEL 器件能够在织物基板上呈现更鲜艳的色调。