Patent ID: 7948172

Claim:
A thin-film, white-light-emitting diode device, including: a) a reflective, conductive thin-film structure and a semitransparent, conductive thin-film structure; b) one or more thin-film layers formed between the reflective and semi-transparent conductive thin-film structures forming only two commonly-controlled microcavity structures, the thin-film layer(s) emitting white light in response to current provided by the conductive thin-film structure; c) wherein each of the two commonly-controlled microcavity structures has a different resonant frequency within one of the optical cavities and emits light with a smaller spectral range than the spectral range of the white-light-emitting thin-film layer(s), a combination of light emitted from the two commonly-controlled microcavity structures is white; and d) wherein light emitted by the one of the two commonly-controlled microcavity structures is blue and light emitted by the other of the commonly-controlled microcavity structures is yellow, or light emitted by one of the commonly-controlled microcavity structures is cyan and the light emitted by the other of the commonly-controlled microcavity structures is red, or light emitted by one of the commonly-controlled microcavity structures is green and the light emitted by the other of the commonly-controlled microcavity structures is magenta.