Selecting a Suitable Remote Phosphor Configuration for Improving Color Quality of White Led

Patterned structure of remote phosphor for phosphor-converted white LEDs.

High efficiency white light-emitting diodes with superior color-mixing have been investigated. It is suggested that the patterned remote phosphor structure could improve the uniformity of angular-dependent correlated color temperature (CCT) and achieve high chromatic stability in wider operating current range, as compared to the conventional remote phosphor coating structure. In this experiment...

Optimizing the Performance of Remote Phosphor LED

The accuracy of results from Monte Carlo ray-tracing analysis significantly depends on the input values of the optical properties of the various package components. One important piece of input information is the phosphor particle MFP (mean-free-path), which is not easily determined. This study introduced a method to determine the MFP by matching the experimental results with optical ray-tracin...

Thermal management of the remote phosphor layer in LED systems

Generally in a white light-emitting diode (LED), a phosphor slurry is placed around the semiconductor chip or the phosphor is conformally coated over the chip to covert the narrowband, short-wavelength radiation to a broadband white light. Over the past few years, the remote-phosphor method has provided significant improvement in overall system efficiency by reducing the photons absorbed by the...

Strongly Enhanced Phosphor Efficiency in GaInN White Light-Emitting Diodes Using Remote Phosphor Configuration and Diffuse Reflector Cup

Jong Kyu KIM, Hong LUO, Eric Fred SCHUBERT , Jaehee CHO, Cheolsoo SONE and Yongjo PARK Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, U.S.A. Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, U.S.A. Photonics Program Team, Samsung Advanced Institute of Technology, Suwon 440-600,...

Investigation of Remote-Phosphor White Light-Emitting Diodes with Multi-Phosphor Layers