Device for controlling a lamp including at least two LEDs emitting light in different colors
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United States of America Patent
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Issued Date -
Aug 12, 2004
app pub date -
Feb 4, 2004
filing date -
Feb 4, 2003
priority date (Note) -
Abandoned
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Abstract
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.
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