APPARATUS AND METHOD FOR MONITORING LED COLOUR MIX

An LED assembly (50) includes a plurality of LEDs including a first LED (52, 56, 60) of a first colour and a second LED (54, 58, 62) of a second colour. The assembly also includes a driver (53). The driver (53) includes a monitor (55) for monitoring a response of an LED, the absorption spectrum of w...

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Bibliographische Detailangaben
Hauptverfasser:	LOCK, DARREN, PRINS, ANDREW, D, SWEENEY, STEPHEN, J, CRUTCHLEY, BENJAMIN, G, HALL, SIMON RICHARD GEOFFREY
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:	An LED assembly (50) includes a plurality of LEDs including a first LED (52, 56, 60) of a first colour and a second LED (54, 58, 62) of a second colour. The assembly also includes a driver (53). The driver (53) includes a monitor (55) for monitoring a response of an LED, the absorption spectrum of which at least partially overlaps the emission spectrum of the first LED, and thereby obtaining an indication of the light output of the first LED. The assembly also includes a current supply (57). The driver (53) is configured to control the current supply to supply current to at least one LED of the plurality of LEDs in dependence upon the indication of the light output of the first LED whereby to maintain a desired colour mix of output light from the LED assembly (50).