High Spatial Color Uniformity of Phosphor Converted White Light-Emitting Diodes Using the Remote Packaging StructurePages 404-410
Huynh-Tuan-Anh Nguyen Abstract:
The property of spatial color uniformity of white light-emitting diodes is an important requirement for high-quality lighting products. We experimentally conduct the improvement of spatial color uniformity of white LEDs by designing remote placed the yellow phosphor wavelength conversion layer from the blue LED. The angular correlated color temperature deviation can be decreased from 1100 K for the geenerated cool white light (CCT of approximately 6000 K). Effect of injection current on the output light is measured. The proposed structure is feasible, efficient, and meaningful to fabricate the white light with high quality in the field of solid-state lighting. The color rendering quality of output white light is further studied with the IES TM 30-18 assessment.
Keywords: Spatial color uniformity, pcW-LEDs, Color quality, Luminous efficiency, High color rendering index, IES TM 30-18
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