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In this study, we experimentally investigated the effect of chip offset on the packaging consistency of high power LED. A series of LED modules with different chip offset distances and phosphor mass concentration were packaged, and two comparative experiments were conducted. Compared with the conventional modules, the maximum CCT deviation of off-centered modules increased from 128K to 667K. The results...
The state of phosphor will greatly influence the packaging performance such as luminous efficiency, quality of white light and color uniformity. The analysis presents that the small variations of thickness and concentration could significantly influence the light extraction efficiency and the correlated color temperature (CCT). With the increase of thickness and concentration, the light extraction...
High power LED packaging is crucial for the development of solid state lighting. Different optical structures with various states of phosphor will greatly influence the packaging performance such as luminous efficiency, quality of white light and color uniformity. Through the analysis of five different optical structures, it is found that the location of phosphor layer has low impact on the light...
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