Miniaturized-light-emitting diode (mini-LED) backlights have emerged as the state-of-the-art technology for liquid crystal display (LCD), facilitating the improvement in a high dynamic range (HDR) and power saving. The local dimming technology divides the backlight into several dimming zones. Employing mini-LEDs, whose size ranges from 100 to 200 μm, as the light sources can enlarge the number of zones in the local dimming backlight, fulfilling the requirement for HDR. However, the halo effect still acts as one of the primary technological bottlenecks for mini-LED backlights. In this review, packaging technology of LEDs, color conversion, and the driving scheme of mini-LED backlights have been discussed. The strategies to reduce optical crosstalk in adjacent areas by various improved optical structures or to suppress the halo effect of LCDs by mini-LED backlights are summarized. The development trends of mini-LED backlights are also discussed.

中文翻译：

---

Mini-LED 背光：进展和未来前景


小型发光二极管 （mini-LED） 背光已成为液晶显示器 （LCD） 的先进技术，有助于改进高动态范围 （HDR） 和节能。局部调光技术将背光分为几个调光区域。采用尺寸从 100 到 200 μm 的 mini-LED，因为光源可以扩大局部调光背光中的区域数量，满足 HDR 的要求。然而，光晕效应仍然是 mini-LED 背光源的主要技术瓶颈之一。在这篇综述中，讨论了 LED 的封装技术、颜色转换以及 mini-LED 背光源的驱动方案。总结了通过各种改进的光学结构减少相邻区域的光串扰或通过 mini-LED 背光抑制 LCD 光晕效应的策略。还讨论了 mini-LED 背光源的发展趋势。