As a primary level of Micro-LED, Mini-LED backlights are emerging as an advanced TV technology of “high-end direct upgrade”. Currently, many consumer electronics companies launched Mini-LED backlight embedded products, including high-end displays, notebooks, tablet computers, car displays, and so on. Motivated by the promising future, there are many suppliers working on the commercialization of Mini-LED technology related components including chips, packages, panels, and complete machines. This review describes the key technology of Mini-LED backlight technology and the status of current commercialization. This paper also discusses the prospect and challenges of TV technology in future developments.