基於減少回收光損耗的高效率Mini LED背光模組

High-Efficiency Mini LED Backlight Module Based on Reducing Recycled Light Losses

本研究提出一種具新型光學膜堆疊架構之高效率Mini-LED背光模組，旨在為採用TFT-LCD的虛擬實境（VR）顯示器提供高亮度、高對比與低功耗的背光解決方案。所提出之背光模組由Mini-LED燈板及光學膜組構成，並於光學膜堆疊中導入分光膜；透過調控分光膜之分光角度分佈，並搭配與正交稜鏡片相匹配之折射率設計，可有效降低光線在正交稜鏡片內發生全反射的比例，進而提升光利用效率。實驗結果顯示，本研究所提出之設計可使背光模組的輸出輝度提升達17%，驗證其在次世代高性能VR顯示應用中的可行性與效益。

This study presents a high-efficiency Mini-LED backlight module featuring a novel optical film stack architecture, intended to provide a high-brightness, high-contrast, and low-power solution for virtual-reality (VR) displays employing TFT-LCD panels. The proposed backlight configuration consists of a Mini-LED lightboard and an optimized optical film stack incorporating a beam-splitting film. By tailoring the split-angle distribution of the beam-splitting film and selecting a refractive-index pairing compatible with a pair of prism sheets arranged with orthogonal prism axes, the proportion of light undergoing total internal reflection within the prism sheets can be effectively reduced, thereby enhancing the light-utilization efficiency. Experimental results indicate that the proposed design achieves a brightness improvement of up to 17%, demonstrating its feasibility and performance advantages for next-generation high-performance VR display applications.