An experimental laser-scanned display that uses strontium aluminate as a persistent phosphorescent screen. A laser scans across the coated surface, charging it point by point. The glowing afterimage becomes the display. It is part CRT, part vector display, part plotter, and part weird glowing physics toy.

The interesting part is that the screen itself acts like a temporary memory. Instead of relying only on rapid refresh and human persistence of vision, the material holds the image through phosphorescence. This project documents the current prototype, the scanning modes, the behavior of the coating, and future ideas.