A device for performing numerical value conversion of a digital input value in a first unit to a second unit being a natural unit includes a look-up table storing an array of coefficients for performing the numerical value conversion. For these purposes, an apparatus for fabricating a quantum dot functional structure is provided. The handle and the holder can each have a flange, respectively, to secure to the cup. The process of forming the coating composition includes blending and milling the alloy with the oxide component.