Title :
The phosphor´s optical properties — White light quality relationship of white LEDs
Author :
Sommer, C. ; Hartmann, P. ; Pachler, P. ; Hoschopf, H. ; Wenzl, F.P.
Author_Institution :
Inst. of Surface Technol. & Photonics, Joanneum Res. Forschungsgesellschaft mbH, Weiz, Austria
Abstract :
Based on optical ray-tracing simulations we discuss the effect of the extinction coefficient and the quantum efficiency of the phosphors on the color temperature and the angular homogeneity of the white light emitted from phosphor converted light-emitting diodes. The individual absorption profiles of the blue LED light and the related radiative loss mechanisms turn out to have a tremendous impact on the white light quality of the respective white LED sources.
Keywords :
extinction coefficients; light emitting diodes; optical losses; phosphors; ray tracing; visible spectra; absorption profiles; angular homogeneity; blue LED light; color temperature; extinction coefficient; light-emitting diodes; optical ray-tracing simulations; phosphor optical properties; quantum efficiency; radiative loss; white LED source; white light quality; Color; Detectors; Extinction coefficients; Light emitting diodes; Materials; Phosphors; Photonics;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-61284-876-1
Electronic_ISBN :
2158-3234
DOI :
10.1109/NUSOD.2011.6041133
