JANUS

This project introduces JANUS, a double-sided transparent display system designed to overcome the inherent privacy and lateral inversion limitations of conventional see-through screens. Utilizing the principle of Persistence Of Vision (POV), the system employs a high-speed rotating PCB blade equipped with tri-color LED arrays on both sides. This configuration allows for the simultaneous projection of independent, non-inverted images to viewers on opposite sides of the screen while maintaining a high level of transparency (approximately 96%). Integrated with infrared touch sensor frames, the project enables direct face-to-face interaction and collaboration. Users can selectively share visual content, perform independent tasks on the same spatial coordinate without interference, and engage in pseudo-3D manipulations. By providing two separate graphical layers with directivity, this research demonstrates a novel approach to collocated interaction, effectively mediating the virtual dimension into the physical space without compromising user privacy or readability.