Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1995-09-13
1997-10-07
Nold, Charles
Stock material or miscellaneous articles
Composite
Of inorganic material
428917, 385 47, 385131, 313504, 372 41, 372 62, 372 44, 359838, H05B 3312, H01S 308
Patent
active
056746369
ABSTRACT:
Optical microcavities are potentially useful as light emitters for, e.g., flat panel displays. Such microcavities comprise a layer structure, including two spaced apart reflectors that define the cavity, with a layer or layers of organic (electroluminescent) material disposed between the reflectors. We have discovered that a microcavity can simultaneously emit radiation of two or more predetermined colors such that the emission has a desired apparent color, exemplarily white. Emission of two or more colors requires that the effective optical length of the cavity is selected such that the cavity is a multimode cavity, with the wavelengths of two or more of the standing wave modes that are supported by the cavity lying within the emission region of the electroluminescence spectrum of the active material. A particular embodiment with two organic emitting (active) layers is disclosed.
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Dodabalapur Ananth
Miller Timothy Mark
Rothberg Lewis Josiah
Nold Charles
Pacher Eugen E.
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