The blue wavelength emitted by the Micro LEDs wafer cannot fully absorb the incident wavelength when passing through the redgreen quantum dots, resulting in poor color puritycolor mixing problems. In this study, it is proposed to add a feedback color purity enhancement film above the color conversion layer to allow the redgreen light of specific wavelengths to pass,the light of the remaining wavelengths will be reflected back to the quantum dot color conversion layer for reabsorptionconversion. After the second feedback, a display with high efficiencyhigh color purity can be obtained.

Micro LED 經由量子點色轉換層由於不能完全吸收和發射藍色轉換為紅綠波長，導致色純度差和混色問題。為了解決這個問題，重傳方式是以彩色濾光片吸收多餘的藍光來提升色純度. 此方法會造成效率嚴重的損失.
 
 本研究提出在色彩轉換層上方增加反饋色純度增強膜，由多對高低折射率材料和低折射率材料交替堆疊組成，其中高折射率材料（H）為NB2O5（n=2.43983），低折射率材料（L）為SiO2（n=1.47591），基板（Sub）為玻璃（n=1.51274）。優化結果表明，光學薄膜疊層結構為HL27 H/Sub，總層數為55層，總物理厚度分別為3937.16 nm。實際樣品的透射光譜表明，綠光的半峰全寬為18 nm，平均透射率為90.43；紅光的半峰寬為18 nm，平均透射率為89.3, NTSC 增加到 140.4 可以增加 1.257 倍。且由於是以回售再利用方式故光轉換效率可提升25~35.

Micro LEDs can＇t fully absorbemit blue wavelengths, resulting in poor color puritycolor mixing problems. In order to solve this problem, this study proposes to add a feedback color purity enhancement film above the color conversion layer for full-color Micro LEDs displays to obtain high-efficiencyhigh-color-purity displays, which are competitive in AR/VRother virtual reality products.