Device for controlling a lamp including at least two LEDs emitting light in different colors

The device ( 10 ) for controlling a lamp including LEDs emitting light in at least two different colors comprises at least two current sources ( 14,16,18 ) of which each is assigned to a group of LEDs ( 20,24,26 ) emitting light of the same colors; and is arranged to supply these LEDs ( 20,24,26 ) w...

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Bibliographische Detailangaben
Hauptverfasser: Rehbein, Ralf, Trinschek, Robert, Schmees, Siegfried, Gronemeier, Frank, Geske, Carsten, Mueller, Bernhard, Meyer, Thomas
Format: Patent
Sprache:eng
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Zusammenfassung:The device ( 10 ) for controlling a lamp including LEDs emitting light in at least two different colors comprises at least two current sources ( 14,16,18 ) of which each is assigned to a group of LEDs ( 20,24,26 ) emitting light of the same colors; and is arranged to supply these LEDs ( 20,24,26 ) with a continuous current having an adjustable amplitude. Further, the device ( 10 ) comprises a control unit ( 30 ) for controlling the current sources ( 14,16,18 ) to adjust the amplitudes of the currents generated by the current sources ( 14,16,18 ) so as to generate a desired color of the mixed light emitted by the totality of the LEDs ( 20,24,26 ), and a setting unit ( 36 ) for influencing the total current of all current sources ( 14,16,18 ) to thus set the intensity of the mixed light.