An electronic apparatus and a method for controlling thereof are provided. The assembly includes an interconnect structure including a plurality of interconnect layers disposed in a spaced relationship, where each of the plurality of interconnect layers comprises a plurality of conductive traces disposed thereon. Optical character recognition techniques can then be used to identify these features in the handwriting sample so that drafts from two different samples can be aligned to compare to determine if the features in the writing sample correlate with each other. The light-emitting element emits light by current flow in each pixel.