Resolution enhancement of Micro-LED projection displays via high-frequency vibration

Micro-LED, known for its high brightness, wide color gamut, long lifespan, and reliability, has attracted significant attention and holds great potential for self-emissive micro-projection and near-eye displays. However, current challenges in manufacturing and repair pose significant obstacles to improving the Micro-LED’s pixel density, thereby impacting further micro-display developments. To address this, this paper proposes a novel resolution-enhanced approach for Micro-LED projection display that integrates a high-frequency vibrating glass (HVG) between the Micro-LED display panel and the projection lens, achieving four times the image resolution without boosting the native resolution of the Micro-LED panel. Based on the principle of beam lateral displacement and time multiplexing, multiple spatially offset images of the Micro-LED panel is generated by controlling the HVG’s vibration angle and then superimposed by the projection lens. Experimental results confirm the spatial image shifting effect through precise control of the HVG’s vibration direction and angle, effectively doubling the number of horizontal and vertical pixels respectively. The display resolution of the Micro-LED projection is finally enhanced by four times—currently the highest in projection resolution enhancement techniques. This proposed system pushes the boundaries of self-emissive projection technology and offers a novel solution for ultra-high-resolution Micro-LED displays.