Nice idea! The trick is to keep the light source tiny and bright—pico‑LEDs or a laser diode with a tiny reflective lens works best. I usually drive a 1‑inch laser array from a Teensy and use a flat‑bed lens to spread the beam onto the acrylic. Add a tiny heat sink and a 3‑D printed clip to keep everything in place, and you’ve got a pocket cinema that can throw a decent picture on any wall. Want to swap the LED for a laser? I’ll bring the soldering iron and we’ll see how far we can push the pixel density before the screen warps.