LIGHT EMITTING DEVICE AND LIGHTING SYSTEM HAVING THE SAME

The invention concerns a light emitting device comprising a first light emitting portion comprising a first light emitting diode chip and a first phosphor, the first light emitting diode chip emitting blue or UV light, the first phosphor converting the blue or UV light into a longer wavelength light...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LEE, Chung Hoon, TEWS, Walter, ROTH, Gundula
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS CHEMISTRY DYES ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:	The invention concerns a light emitting device comprising a first light emitting portion comprising a first light emitting diode chip and a first phosphor, the first light emitting diode chip emitting blue or UV light, the first phosphor converting the blue or UV light into a longer wavelength light, the first light emitting portion emitting light with a first color temperature by combination of light emitted from the first light emitting diode chip and the wavelength-converted light by the first phosphor; and a second light emitting portion comprising a second light emitting diode chip and a second phosphor, the second light emitting diode chip emitting blue or UV light, the second phosphor converting the blue or UV light into a longer wavelength light, the second light emitting portion emitting light with a second color temperature by combination of light emitted from the second light emitting diode chip and the wavelength-converted light by the second phosphor, wherein the first color temperature is higher than the second color temperature, and wherein the first and second light emitting portions are driven independently.