针对白光发光二极管(LED)器件封装中存在的荧光粉沉淀现象, 对点胶后不同静置时间下白光LED的光学性能和色坐标集中度进行了研究。研究结果表明, 当荧光粉静置时间在0~30 min时, 色坐标落点较为集中, 中心坐标位于色容差7 SDCM内; 30~40 min时, 落点较为分散, 中心坐标超出色容差。模拟了白光LED灯具在热学平衡时的热量分布, 结果显示LED灯具的工作温度满足工业生产的需求。

Aiming at the phenomenon of phosphor sedimentation during white light emitting diode (LED) package, the optical properties and the concentration ratios of color coordinates of a white LED after dispensing are studied under different standing time. The study results show that, when the standing time is between 0 and 30 min, the color coordinate setting is concentrated whose center coordinates are in the range of 7 SDCM color tolerance; when the standing time is between 30 min and 40 min, the color coordinate setting is dispersive whose center coordinates are out of the range of color tolerance. The heat distribution of white LED lamps at the heat balance is simulated and the results show that the working temperature of light emitting diode lamps meets the requirements of industrial production.