Even if it doesn't work over the whole visible spectrum, is there any way that this could be used in some way that is sort of like an inverse ink jet printer wh

Even if it doesn't work over the whole visible spectrum, is there any way that this could be used in some way that is sort of like an inverse ink jet printer where half-toning is used with a couple basis wavelengths to simulate the whole color spectrum? Am I basically just describing something similar to an LED screen but in lens form?