A light emitting device includes a light emitting diode ; a transparent optic having a refractive index noptic; and a phosphor layer spaced apart from the LED and positioned between the LED and the transparent optic. Sense amplifiers are positioned between adjacent rows in the individual arrays while row decoders are positioned between adjacent columns in the individual arrays. Each light guide plate has a top face, at least one side face, and at least one connecting part. In one of the two cross-sections a top surface of the outgassing source layer is not covered by the outgassing barrier layer and in the other of the two cross-sections the outgassing source layer is encapsulated in the outgassing barrier layer.