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Light emitting devices with phosphor wavelength conversion and methods of fabrication thereof

  • US 20090117672A1
  • Filed: 10/01/2007
  • Published: 05/07/2009
  • Est. Priority Date: 10/01/2007
  • Status: Abandoned Application
First Claim
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1. A method of fabricating a light emitting device having a specific target color of emitted light, the device comprising at least one light emitting diode operable to emit light of a first wavelength range and at least one phosphor material which converts at least a part of the light into light of a second wavelength range wherein light emitted by the device comprises the combined light of the first and second wavelength ranges, the method comprising:

  • a) depositing a pre-selected quantity of the at least one phosphor material on a light emitting surface of the at least one light emitting diode;

    b) operating the at least one light emitting diode;

    c) measuring the color of light emitted by the device;

    d) comparing the measured color with the specific target color; and

    e) in dependence on the comparison depositing and/or removing a quantity of a phosphor material substantially to attain the specific target color.

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