采用紫外(UV)辐射固化荧光粉胶层。研究UV胶中各个成分对固化膜透射率的影响，找出透射率最高的匹配比例。用最佳比例的UV胶和荧光粉混合，与传统荧光胶对比，观察荧光粉沉降现象。分别用UV胶和AB胶封装LED，测量LED的光学性能，通过对比研究紫外固化对LED光学性能的影响。研究发现荧光粉在UV胶中沉降现象比AB胶中不明显；与AB胶封装的LED对比，UV荧光粉胶对LED的光谱分布、显色指数、相对色温和光通量等光学性能没有明显的影响和改变。

Phosphor layer is solidified by ultraviolet (UV) radiation. Experiments are done on various components of UV glue to study the influence of curing on the film transmittance. The best matching ratio to get the highest transmittance is obtained. Mixing phosphor with the best proportion of UV glue, the phenomenon of phosphor sedimentation is observed and it is compared with that of the traditional glue. The optical performance of LED respectively packaged by UV glue and AB glue are measured. Through the measurement results, the influence of UV curing on LED optical performance is analyzed. It is found that the phosphor sedimentation phenomenon is more obvious in the AB glue than that in the UV glue. While compared with AB curing LED, the UV curing LED has no significant discrepancy on the optical properties such as the distribution of the LED spectrum, color rendering index, correlated color temperature and luminous flux.