2D Persistence of Vision Display

Cathode ray tube (CRT) televisions raster an electron beam (3 beams in most color CRT televisions) across a screen of fluorescent material(s) exciting the phosphor's electronic state. Once the phosphor relaxes a photon is released. The lifetime of the material's persistence is one to two orders of magnitude faster than the raster period. This is an example of a 0D updating element creating a POV 2D display via 2D translational motion. A pulsed laser with a 2D galvanometer is another example. This project takes a different approach and makes a 2D POV display using a 1D updating element, a line segment or curve of LEDs, and 1 axis of rotation. This method can create finite surfaces with two degrees of freedom. Specifically, this project makes a simple finite plane display.