基于Micro-LED照明的量子点颜色转换特性

Optical Properties of Quantum Dots Color-Conversion Using Micro-LED Illumination

结合Micro-LED的量子点颜色转换具有高亮度、高效率和宽色域的优势,在显示领域具有广阔的应用前景。建立了Micro-LED照射下的量子点单体模型和阵列模型,对量子点颜色转换的出射光谱、发光效率、发光角度等光学特性进行了研究。首先在Light Tools中建立CdSe/ZnS量子点单体模型,设置模拟光源面、量子点膜层与探测器,仿真结果表明紫外Micro-LED激发量子点产生的三色光在色域方面优于蓝光光源,且红色和绿色量子点颜色转换效率更高。同时,随着激发光源发光角度的增大,出射光场整体照度分布均匀性提高,紫外区域漏光减少。建立6×6的量子点单体阵列模型,比较添加微结构和未添加微结构的两种阵列模型发光效果,通过分析真彩图和照度图发现,具有微结构的量子点阵列的出射光场边缘清晰、颜色边界鲜明,适用于高画质屏幕的使用。

With the distinct advantages of high-brightness,high-efficiency and wide-gamut,color-conversion with quantum dots and Micro-LED illumination holds great potentials in display domain.On the basis of the single and arrayed quantum dots model,spectrum,efficiency and viewing angle of quantum dots color-conversion procedure are characterized and demonstrated in detail.In Light Tools,simulation models is built up by Micro-LED light source,film layer of quantum dots and detector.The simulated results report color conversion efficiency from the ultraviolet Micro-LED is better than the blue source,and green,red color output light have higher conversion efficiency using corresponding quantum dots.Additionally,with the increase of viewing angle from Micro-LED,the uniformity of illuminance distribution is highly improved and the light leakage in the ultraviolet region is apparently decreased.Utilizing the newly-designed 6×6 quantum dots modality,the arrayed models with and without microstructure are investigated and compared.From the calculated true color map and illumination map,the output light from arrayed quantum dots with microstructure has obvious features of clear edges and sharp color boundaries,which is extremely applicable for high-performance display devices.