Abstract: Alternating current electroluminescence (ACEL) has attracted widespread attention as a unique display technology. Traditional ACEL devices generally use rigid materials as the substrate, so the resulting products are usually rigid and brittle, greatly limiting their application and development in the flexible field. In contrast, flexible ACEL devices have extremely high deformation ability and can still function stably in stretching, bending, folding, and twisting states, demonstrating enormous application potential in the field of intelligent interaction. Therefore, combining multi-dimensional and multi-scale textiles or one-dimensional linear fibers with ACEL functions can give ACEL devices advantages such as flexible processing and good user experience, making it a hotpoint of current scientific research. At present, knitting or weaving ACEL fibers into luminescent textile devices can not only meet the needs of intelligent wearability, but also give textiles additional functions. Meanwhile, due to the continuous advancement of component materials (phosphors, dielectrics, and conductive substrates) and the integration with other technologies, the luminescent performance of flexible ACEL fibers has been significantly improved and other unique characteristics have been obtained, making ACEL devices suitable for multifunctional display interaction and intelligent sensing interaction.
Although some previous articles have been reported on flexible ACEL devices, most of them have not focused on the field of flexible ACEL fibers. At the same time, the research progress on textile-based ACEL devices in the field of intelligent interaction is not complete and in-depth enough. Therefore, in order to optimize the performance of flexible ACEL fibers and expand their practical application scenarios, strengthen the research depth and breadth of textile-based flexible ACEL devices in the field of intelligent interaction, and promote the technological progress and application progress in the field of flexible ACEL, this article provides a comprehensive and systematic summary. First of all, this article introduces the principles of flexible ACEL fibers and explains the impact of alternating current's voltage and frequency on the luminous intensity and color of ACEL fibers from a microscopic perspective. Based on the principles of flexible ACEL fibers, this article elaborates on their characteristics in detail, including textile processability and photoelectric properties. Secondly, this article focuses on discussing the two structures of flexible ACEL fibers and comparing their advantages and disadvantages. Combining with the research progress of flexible ACEL fibers in recent years, the article elaborates the processing methods of different structures of flexible ACEL fibers, and compares the performance of the prepared flexible ACEL fibers. Finally, this article makes a summary and provides a detailed analysis of the challenges and opportunities faced by flexible ACEL fibers. It also provides prospects for the future development direction of flexible ACEL fibers.

Key words: alternating current electroluminescent fiber, intelligent interaction, textile processing properties, photoelectric properties, research progress

摘要： 交流电致发光作为一种独特的显示技术，受到了人们的广泛关注，但对交流电致发光纤维领域却关注较少。文章对交流电致发光纤维在智能交互领域中的应用进行了总结。首先，介绍了交流电致发光纤维的原理和特性，包括交流电致发光纤维的纺织加工性和光电特性；其次，重点讨论了交流电致发光纤维的两种基本结构，包括同轴结构和并行结构，并结合近几年交流电致发光纤维的研究进展，阐述了两种结构的优势和不足；最后，对交流电致发光纤维的未来发展方向进行了展望。

关键词: 交流电致发光纤维, 智能交互, 纺织加工性, 光电特性, 研究进展