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Illumination system having color temperature control and method for controlling the same

  • US 9,351,355 B2
  • Filed: 12/16/2011
  • Issued: 05/24/2016
  • Est. Priority Date: 12/30/2005
  • Status: Active Grant
First Claim
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1. An illumination system, comprising:

  • a power supply unit; and

    a light emitting apparatus driven by power supplied from the power supply unit,wherein the light emitting apparatus comprises;

    a first light emitting portion and a second light emitting portion disposed in a same light emitting package and configured to be independently driven to emit output light; and

    a controller configured to control at least one of a color temperature and a luminous flux of the output light by controlling operations of the first and second light emitting portions, andwherein the controller is configured to generate a first control signal based on luminous flux control data and a second control signal based on color temperature control data,and the controller is configured to output the first control signal to control an output luminous flux of the first light emitting portion and output the second control signal to control a color temperature of the second light emitting portion.

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