I think the numbers and letters in the 10x10 matrix could be drawn better, the single digits and some of the letters appear inconsistent and the letters with the double-width lines really don't work, just having the line be uncentered would look better. Overall these are some interesting display designs, but it would be nice to see some clips of multiple digits next to each other so we can better see what they would look like as a display, especially for the ones that can display letters. When you're designing a font it's always good to check how the letters look in various words throughout the process.