The Impact of Distance Between Two Phosphor Layers on Luminous Flux and Color Quality of Remote Phosphor Package

  • Nguyen Thi Phuong Thao
  • Miroslav Voznak
  • Nguyen Doan Quoc AnhEmail author
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 465)


In this paper, we propose and present a method to enhance luminous efficiency, color rendering property and color scale quality of the multi-chip white LED lamps (MCW-LEDs). This can be done by changing the distance between two phosphor layers in remote phosphor layer with a dual-layer structure. Index, with the appropriate distance between two phosphor layers could offer a great increase on the optical performance of MCW-LEDs. Simulation results demonstrated that the luminous efficiency, the color rendering property, the color scale quality of MCW-LEDs significantly improve with distance from 0 to 0.1 mm, meanwhile the optical performance slightly decreases with the distance from 0.1 to 0.7 mm. To obtain the highest lumen output efficiency and the best color rendering index, the distance around 0.1 mm should be suggested.


Dual-layer structure Remote phosphor package Luminous flux Color rendering index Color quality scale Multi-chip white LED lamp 


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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Nguyen Thi Phuong Thao
    • 1
    • 2
  • Miroslav Voznak
    • 2
  • Nguyen Doan Quoc Anh
    • 1
    Email author
  1. 1.Faculty of Electrical and Electronics EngineeringTon Duc Thang UniversityHo Chi Minh CityVietnam
  2. 2.Faculty of Electrical Engineering and Computer ScienceVSB–Technical University of OstravaOstrava-PorubaCzech Republic

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