Lu Yi, Tang Biao, Yang Guisong, Guo Yuanyuan, Liu Linwei, Henzen Alex
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China.
Micromachines (Basel). 2021 Feb 18;12(2):206. doi: 10.3390/mi12020206.
Electrowetting display (EWD) has promising prospects in the electronic paper industry due to it having superior characteristics, such as the ability to provide a comfortable reading experience and quick response. However, in real applications, there are also problems related to dielectric deterioration, excess power consumption, optical instability and narrow color gamut etc. This paper reviewed the existing challenges and recent progress made in terms of improving the optical performance and reliability of EWD. First, the principle of electrowetting applied in small and confined configurations is introduced and the cause of the failure of the dielectric layer is analyzed. Then, the function of the pixel structures is described to avoid display defects. Next, electric signal modulations are compared in terms of achieving good image quality and optical stability. Lastly, the methods are presented for color panel realization. It was concluded that multi-layer dielectrics, three-dimensional pixel structures, proper electric frequency-and-amplitude modulation and an RGB color panel are expected to resolve the current limitations and contribute to designing advanced reflective displays.
电润湿显示器（EWD）因其具有卓越特性，如能提供舒适的阅读体验和快速响应，在电子纸行业有着广阔前景。然而，在实际应用中，也存在与介电劣化、功耗过大、光学不稳定性和色域狭窄等相关的问题。本文综述了在提高EWD光学性能和可靠性方面存在的挑战及近期取得的进展。首先，介绍了应用于小尺寸和受限结构中的电润湿原理，并分析了介电层失效的原因。然后，描述了像素结构的功能以避免显示缺陷。接下来，在实现良好图像质量和光学稳定性方面对电信号调制进行了比较。最后，介绍了彩色面板实现的方法。得出的结论是，多层电介质、三维像素结构、适当的电频率和幅度调制以及RGB彩色面板有望解决当前的局限性，并有助于设计先进的反射式显示器。
