Efficient Warm White Light Emission through LED Technology

Strategic Insights -

The latest innovation in LED technology, as demonstrated by Patent No. WO/2011/121489, presents an efficient method for producing warm white light. By incorporating a phosphor-coated blue light emitting diode array and a red light emitting diode array, this invention achieves a high-quality warm white light. The light emitting diode light source's performance is enhanced by maintaining a specific ratio of lumen output between the blue and red arrays, resulting in an improved color point of the mixed light emitted. This invention has significant implications for the development of energy-efficient lighting solutions.

Key Takeaways:

  • The light emitting diode light source comprises a red light emitting diode array and a phosphor-coated blue light emitting diode array, with a specific ratio of lumen output between the two arrays.
  • The color point of the mixed light emitted falls within a quadrilateral of the CIE chromaticity diagram, with coordinates (0.375, 0.427), (0.390, 0.456), (0.366, 0.430), and (0.38, 0.46).
  • When the junction temperature of light emitting diodes is substantially equal to room temperature, the ratio of the lumen output of the phosphor-coated blue light emitting diode array to the lumen output of the red light emitting diode array is within the range of 4:1 to 1.5:1.
  • The quality of the warm white light is efficiently improved by this light emitting diode light source.
  • This invention was filed on 23.03.2011 under Application No. PCT/IB2011/051216.

Statistics:

  • The ratio of the lumen output of the phosphor-coated blue light emitting diode array to the lumen output of the red light emitting diode array is between 4:1 and 1.5:1.
  • The coordinates of the quadrilateral of the CIE chromaticity diagram are (0.375, 0.427), (0.390, 0.456), (0.366, 0.430), and (0.38, 0.46).

Sources:

  • World Intellectual Property Organization: Publication No. WO/2011/121489.
  • World Intellectual Property Organization: Application No. PCT/IB2011/051216.