The ubiquitous Vuduri viewscreens are extremely high-resolution and have essentially no wiring. They have emitters along the frame that project an ultrahigh frequency array of electromagnetic radiation through the panel. The panel itself is a borosilicate matrix doped with gallium arsenide, germanium oxide and other rare earth elements. Kind of a glass.
The variety of compounds within it that emit photons when excited by the proper resonant frequency. The X and the Y grids have differing frequencies which are adjustable. When a certain element, call it a pixel, is to be excited, the frequencies of the two beams are adjusted so that where they intersect, the difference is the resonant frequency of the active element. It is a type of high-frequency beat phenomenon.
The beat phenomenon excites the desired element into a higher energy state and when the excitation stops, it drops back to its resting state and emits a photon of certain color. It is like an LED except you don’t need to actually build the electronics into the panel. Very simple to manufacture and display. No wires to speak of.
The pitch is the size of one molecule so they are capable of extremely high resolution.