Better yet, move the matrix in the normal axis to put your pixels in 3D space. https://www.google.com/search?q=swept+volume+display https://www.google.com/sear

Better yet, move the matrix in the normal axis to put your pixels in 3D space. https://www.google.com/search?q=swept+volume+display https://www.google.com/search?q=swept+volume+display For something less cutting edge, you can spin a bar with individual LEDs instead of a disk full of holes. Also makes for a good DIY project now that we have the microcontrollers to do it without specialized slip rings. But contrary to popular use, neither of these is a 'holographic display' as they don't use holography!