Patent ID: 7893612

Claim:
A light-emitting diode device, comprising: a) a first group of differently colored sub-pixels each comprising a reflective electrode and a second electrode formed over a substrate with an unpatterned light-emitting layer formed between the reflective electrode and the second electrode to comprise a first optical cavity having a first cavity length, and wherein either the reflective or second electrode is patterned to form two or more independently-controllable, differently colored light-emitting sub-pixels; and b) a second group of sub-pixels each comprising the reflective electrode and the second electrode formed over the substrate with the unpatterned light-emitting layer formed between the reflective electrode and the second electrode to comprise a second optical cavity having a second cavity length different from the first cavity length of the first optical cavity, and wherein either the reflective or second electrode is patterned to form one or more independently-controllable, light-emitting sub-pixels, wherein the second electrode of either group is transparent and further comprising a low-index layer adjacent the second electrode having an optical index lower than the optical index of the second, transparent electrode.