LED DEVICE HAVING IMPROVED LIGHT OUTPUT

摘要

A white light-emitting microcavity light-emitting diode device, comprising: a) A reflective electrode and a semi-transparent electrode formed over a substrate and an unpatterned white-light-emitting layer formed between the reflective electrode and the semi-transparent electrode, the reflective electrode, semi-transparent electrode, and unpatterned white-light-emitting layer forming an optical cavity. Either the reflective or semi-transparent electrode is patterned to form independently-controllable light-emitting sub-pixel elements. b) Color filters are formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting-layer in correspondence with the independently-controllable light-emitting elements to form colored sub-pixels. At least one independently-controllable light-emitting element has at least two commonly-controlled portions that together emit substantially white light to form a white sub-pixel. c) The optical cavity of one or more of the commonly-controlled portions of the white sub-pixel comprises optical microcavities tuned to emit light at a different complementary wavelength at an emission angle.