Development of a calculation method of multi-color mixed phosphor spectrum prediction in white-light LED

Yong-Sheng Lin; Shih-Hsin Ma; Chun-Ming Tseng

doi:10.1117/12.2532858

30 August 2019 Development of a calculation method of multi-color mixed phosphor spectrum prediction in white-light LED

Yong-Sheng Lin, Shih-Hsin Ma, Chun-Ming Tseng

Proceedings Volume 11104, Current Developments in Lens Design and Optical Engineering XX; 111040X (2019) https://doi.org/10.1117/12.2532858
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

We present the results of this study of a calculation model built for predicting the spectrum of white-light LED (WLLED) with different concentration formula of three kinds of the phosphor. First, we analyze the spectrum of the blue light LED with different penetrating concentrations of the phosphor. Next, we analyze the emission spectrum after absorption of blue light by the phosphor and the re-absorption effect. Then, we introduce the re-absorption effect into the superimposed spectrum of blue light and the emitting light. Finally, we compare the superimposed spectrum with the experimental result. By this method, we can predict the behavior of the WLLED, such as optical efficiency, chromaticity coordinates, correlated color temperature (CCT), and color rendering. Thus, we obtain the weight ratio of the multi-color mixed phosphor (MCP) of high color rendering WLLED.

Citation Download Citation

Yong-Sheng Lin, Shih-Hsin Ma, and Chun-Ming Tseng "Development of a calculation method of multi-color mixed phosphor spectrum prediction in white-light LED", Proc. SPIE 11104, Current Developments in Lens Design and Optical Engineering XX, 111040X (30 August 2019); https://doi.org/10.1117/12.2532858

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