Lighting systems for providing tunable light with high color rendering

A system for emitting device for emitting emitted light, including (a) a first light emitter comprising a first LED and having only blue phosphor; (b) a second light emitter comprising a second LED and having only green phosphor; (c) a third light emitter comprising a third LED and having only red p...

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Bibliographische Detailangaben
Hauptverfasser:	Pickard, Paul Kenneth, Petluri, Raghuram L. V
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED LIGHT SOURCES NOT OTHERWISE PROVIDED FOR LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS LIGHTING MECHANICAL ENGINEERING NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE SEMICONDUCTOR DEVICES WEAPONS
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Beschreibung
Zusammenfassung:	A system for emitting device for emitting emitted light, including (a) a first light emitter comprising a first LED and having only blue phosphor; (b) a second light emitter comprising a second LED and having only green phosphor; (c) a third light emitter comprising a third LED and having only red phosphor; wherein said first, second and third LEDs are blue LEDs, wherein said first and third LEDs having a peak wavelength of about 450 nm to about 455 nm; and (d) a control circuit configured to independently control said first, second and third light emitters to vary said emitted light, said emitted light falls within a 7-step MacAdam ellipse around any point on the black body locus having a correlated color temperature (CCT) between 2500K and 5500K, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.