Color converted light emitting apparatus

A color converted light emitting apparatus is provided that has excellent light emission characteristics and can be manufactured while a viscosity suitable for a printing method is maintained. The color converted light emitting apparatus can include a light emitting element and a color conversion la...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Kawakami, Yasuyuki, Akagi, Tsutomu
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A color converted light emitting apparatus is provided that has excellent light emission characteristics and can be manufactured while a viscosity suitable for a printing method is maintained. The color converted light emitting apparatus can include a light emitting element and a color conversion layer containing a phosphor that is excited by light emitted from the light emitting element and which emits fluorescent light. The color conversion layer can further contain, as first and second thickeners, two types of particles with different average primary particle diameters. The average primary particle diameter of the second thickener can be less than one half of the average primary particle diameter of the first thickener. By appropriately adjusting the average primary particle diameters and the amounts of the thickeners added, the light emission characteristics and the emission chromaticity can be improved. For example, the first thickener can be adjusted to be present in the amount of at least 30 wt % and less than 100 wt % based on a total weight of the first and second thickeners.