P‐17.3: Micro‐LED Projection Display Resolution Enhancement System

Self‐luminous projection technologies, such as Micro‐LED chips, compared with traditional projection methods, does not require complex lighting path. So it can significantly improve light utilization rate and reduce costs. However, technical challenges in Micro‐LED chip production make it difficult to improve the chip's resolution further. Some studies have shown that compared with the original image resolution of the spatial light modulator (SLM), the projection images overlapped is an effective method to improve the resolution of the projector. In this paper, we study the working principle of the extended pixel resolution actuator and propose a self‐luminous projection resolution enhancement system based on Micro‐LED chip. It can improve the resolution of the projection images with the resolution of the Micro‐LED chip unchanged. The resolution enhancement system consists of a Micro‐LED chip, an extended pixel resolution actuator and a projection lens. According to the working principle of the extended pixel resolution actuator, the projection lens is an image‐space telecentric structure, in which modulation transfer function of projection imaging at Nyquist frequency 100 lp/mm is greater than 0.4. Finally, the tolerance analysis on the projection lens is completed. The results show that the projection lens has a high success rate in processing. This work is of great significance for improving the resolution of Micro‐LED self‐luminous projection images.