標題: | An Investigation of the Optical Analysis in White Light-Emitting Diodes With Conformal and Remote Phosphor Structure |
作者: | Chen, Kuo-Ju Chen, Hsin-Chu Lin, Chien-Chung Wang, Chao-Hsun Yeh, Chia-Chi Tsai, Hsin-Han Chien, Shih-Hsuan Shih, Min-Hsiung Kuo, Hao-Chung 光電工程學系 Department of Photonics |
關鍵字: | GaN;light-emitting diodes (LEDs);optical simulation;phosphor |
公開日期: | 1-十一月-2013 |
摘要: | An effective emission model of phosphor film is proposed by using bidirectional scattering distribution function system (BSDF), and the model is verified by white light-emitting diodes (LEDs) with conformal and remote phosphor structure. The emission model is built to clarify the optical characteristics by analyzing the angular-dependent distribution of emission and excitation behaviors in phosphor film. The white LEDs with conformal and remote phosphor structure are also fabricated for experimental comparison. The uniformity of angular correlated color temperature (CCT) in white LEDs can be determined by the angular distribution of blue and yellow light, which is in turns decided by the refractive index variation between chip a (c) nd phosphor layers. Finally, the experimental results are found to have good agreement with the simulation results performing by the Monte Carlo method. |
URI: | http://dx.doi.org/10.1109/JDT.2013.2272644 http://hdl.handle.net/11536/23291 |
ISSN: | 1551-319X |
DOI: | 10.1109/JDT.2013.2272644 |
期刊: | JOURNAL OF DISPLAY TECHNOLOGY |
Volume: | 9 |
Issue: | 11 |
起始頁: | 915 |
結束頁: | 920 |
顯示於類別: | 期刊論文 |