Sun Qinyue, Tian Zhenhuan, Xu Chuangcheng, Yu Angsu, Li Feng, Yun Feng
Shaanxi Provincial Key Laboratory of Photonics & Information Technology, Xi'an Jiaotong University, Xi'an 710049, China.
Solid-State Lighting Engineering Research Center, Xi'an Jiaotong University, Xi'an 710049, China.
Nanomaterials (Basel). 2024 Oct 10;14(20):1624. doi: 10.3390/nano14201624.
Naked-eye 3D micro-LED display combines the characteristics of 3D display with the advantages of micro-LED. However, the 3D micro-LED display is still at the conceptual stage, limited by its intrinsic emission properties of large divergence angle and non-coherence, as well as difficulties in achieving large viewing angles with high luminous efficiency. In this work, we propose a double-layer metasurface film integrating functions of collimation with multiple deflections, constituting a micro-LED naked-eye 3D display system. The system is characterized through numerical simulations using the 3D finite-difference time-domain method. The simulation results show that the double-layer metasurface film restricts 90% of the emitted light of the micro-LED to the vicinity of the 0° angle, improving its spatial coherence. Subsequently, a large-angle, low-crosstalk outgoing from -45° to 45° is achieved, while providing a deflection efficiency of over 80% and a pixel density of up to 605. We believe this design provides a feasible approach for realizing naked-eye 3D micro-LED displays with a large field of view, low crosstalk, and high resolution.
裸眼3D微发光二极管显示器结合了3D显示的特性与微发光二极管的优势。然而，3D微发光二极管显示器仍处于概念阶段，受到其大发散角和非相干性的固有发射特性限制，以及难以实现大视角和高发光效率的困扰。在这项工作中，我们提出了一种集成了准直和多次偏转功能的双层超表面薄膜，构成了一个微发光二极管裸眼3D显示系统。该系统通过使用3D时域有限差分法进行数值模拟来表征。模拟结果表明，双层超表面薄膜将微发光二极管90%的出射光限制在0°角附近，提高了其空间相干性。随后，实现了从-45°到45°的大角度、低串扰出射，同时提供了超过80%的偏转效率和高达605的像素密度。我们相信这种设计为实现具有大视野、低串扰和高分辨率的裸眼3D微发光二极管显示器提供了一种可行的方法。
