量子点材料兼具极高的色纯度、发光颜色可调以及的荧光量子产率高等特点，已成为显示领域中的明星材料，在提升显示器件的色域方面具有巨大潜力。基于量子点材料的液晶显示背光技术是目前量子点材料在显示器件中的主流应用方向，引起了学术界和工业界的广泛关注。本文将综述量子点液晶显示背光技术的研究进展，主要包括量子点材料的选择、背光结构的应用以及材料复合与封装技术的发展现状，重点介绍了目前产业界广泛关注的量子点光学膜技术，特别是国内自主知识产权的低成本钙钛矿量子点光学膜技术，由于其具备广色域（124%NTSC）、易加工、低成本等特点，已成为具有成长潜力的技术路线。

Quantum dots are rising as suitable candidates in the field of display application due to their extremely high color purity, tunable emission spectra and high photoluminescence efficiency, especially for their contribution to the expanded color gamut in display technology. Motivated by the commercialization in the market, quantum dots based backlights have drawn great deal of attentions from both the scientific and industrial circles. In this paper, the research progress of quantum dot liquid crystal display backlight technology is reviewed, including the selection of quantum dots materials, the application of backlight structure and the development of composite materials and encapsulation technology. In addition, this paper also introduces the low-cost perovskite quantum dot optical film technology, which is widely concerned by industrial circle, especially the low-cost perovskite quantum dot optical film technology with independent intellectual property rights. This technology has the advantages of wide color gamut(124% NTSC), easy processing, and low cost with a great development potential.