White light emitting device and white light source module using the same

  • US 7,959,312 B2
  • Filed: 04/21/2008
  • Issued: 06/14/2011
  • Est. Priority Date: 12/05/2006
  • Status: Active Grant
First Claim
Patent Images

1. A white light source module comprising:

  • a circuit board;

    a blue light emitting diode chip disposed on the circuit board;

    a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and

    a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light,wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 color chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.

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