백색 LED 패키지용 형광체 광학 시뮬레이션 정확도에 관한 연구

다국어 초록 (Multilingual Abstract)

There has been a critical issue in optical simulation of phosphors in LEDs due to their light-reabsorption properties. To improve the accuracy of optical modeling for a white LED package, we utilized the spectrum data of the phosphor-dispersed encapsulant film instead of the phosphor powder. By measuring white LED packages with green and red phosphors, the maximum difference between simulation and experimental results of a color temperature, a color rendition index number and a color coordinate corresponds to ΔT=95K, ΔRa=1.7 and Δxy=0.007, respectively. Based on those results, the proposed method can well explain the change of emission spectra of white LEDs with more than two phosphors which introduce the complex optical phenomena such as absorption, reabsorption, light emission, reflection and scattering, etc.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 본론
• 3. 결론
• References

참고문헌 (Reference)

1 Hoo Keun Park, "Toward scatter-free phosphors in white phosphor-converted light-emitting diodes" 20 (20): 10218-10228, 2012

2 Shu-Li Hsiao, "Phosphor-converted LED modeling using near-field chromatic luminance data" 21 (21): A250-A261, 2013

3 Liao Junyuan, "Optical simulation of phosphor layer of white LEDs" 34 (34): 053008-1-053008-5, 2013

4 Shunsuke FUJITA, "Influence of light scattering on luminous efficacy in Ce:YAG glass-ceramic phosphor" 118 (118): 128-131, 2010

5 Sie-Wook Jeon, "Improvement of phosphor modeling based on the absorption of Skokes shifted light by a phosphor" 22 (22): A1237-A1242, 2014

6 M.H Shin, "Advanced LED Packaging Technology" Bookshill 2013