But what if you want a small matrix that’s actually a big matrix in disguise? For that, you’ll want to follow [elliotmade]’s lead and incorporate fiber optics into your LED matrix.

It looks simple enough – a 64-LED matrix illuminates as the pen draws shapes. But how does the circuit know which LED is under the pen? Good old fashioned matrix scanning is the answer.

Photolithography is essential to producing integrated circuit chips ... that DUV maskless photolithography using a DUV micro-LED active matrix has been demonstrated. This study created a unique ...