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LED DEVICE HAVING IMPROVED CONTRAST

  • US 20090051283A1
  • Filed: 08/21/2007
  • Published: 02/26/2009
  • Est. Priority Date: 08/21/2007
  • Status: Active Grant
First Claim
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1. A light-emitting diode device, comprising:

  • a) a substrate;

    b) a reflective electrode and a semi-transparent electrode formed over the 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 microcavity, and wherein either the reflective or semi-transparent electrode is patterned to form a plurality of independently controllable light-emitting elements;

    c) a plurality of color filters formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting layer in correspondence with the light-emitting elements, the plurality of color filters having at least two different colors and wherein at least one light-emitting element has no color filter; and

    d) a reflected-light absorbing layer located over all of the light-emitting elements.

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