本論文將多顆藍光晶粒與 YAG 螢光粉封裝成一集成式白光 LED，以此光源當實驗樣品，減少光源光展量，同時分析在相同驅動條件下針對有無螢光粉散熱之差異，並評估其散熱效果與光色特性。不同於以往單純只針對 LED 基板進行散熱，本研究在 LED 的測試中利用水冷系統做為散熱裝置，同時對 LED 基板與螢光粉進行散熱，實驗各種不同形式的散熱架構，量測其光度、色度、熱度等資訊。對於頻譜的分析，與針對螢光粉散熱前相比，液冷內嵌式實驗架構能有效控制 LED 頻譜的位移與形變，以降低長時間點亮之色彩不穩定。溫度方面，亦能有效減緩 LED 溫度的上升，將 16 W COB 光源基板溫度控制於 40 度以下，發揮其散熱功效。另外光強度與光視效能的分析，亦能比針對螢光粉散熱前提升至少 10% 以上的實質效果，證實針對螢光粉進行散熱之重要性。;In this study, a cluster white LED with YAG phosphor and blue die array is analyzed. Under the same injection power, the cooling for phosphor resin or not is compared with considerations of heat dissipation and optical characteristics. The breakthrough is that a water cooling system is utilized to make a heat dissipation of the substrate and the phosphor resin rather than a heat sink to attach to the substrate of the LED. In the experiments, several set ups for heat dissipation are tested and analyzed with optical, chromatic, and thermal measurements. With the spectral analysis, the water cooling system for cooling the substrate and phosphor resin can decrease the spectral distortion and shift. Accordingly, the chromatic stability can be improved with the cooling system and method. For the 16 W COB light source, the temperature rising rate of the LED is reduced, and the Tb can be controlled under 40°C which means the heat dissipation is efficient enough. Furthermore, the light intensity and luminous efficacy of the light source can be enhanced at least 10% with phosphor cooling which echoes the importance of heat dissipation of phosphor resin.
