- 學位論文
白光發光二極體封裝之螢光粉後製程優化
Optimization of The Backend Phosphor Process for White LED Package
摘要
LED照明已成為下一代照明光源的主流，在要求高性能下其成本考量才是LED能否成功成為照明主源的重要因素之一，因在低成本要求下，需能達到高亮度、亮CRI，其封裝所需求的成本即相形重要。 近期LED製程為求生產效率下，使用離心製程技術加速螢光粉的沉澱，減少製程等待時間以求減少封裝成本；但採用離心製程所需付出的即為螢光粉耗用，依文獻記錄在同色溫情況下離心製程需使用多4％的螢光粉量，在斤斤計較的LED封裝成本製程中，若能減低螢光粉使用量即對成本有所益助。 本文針對EMC 3535照明元件進行試驗，研究運用其他條件或方式使膠體固化，減少螢光粉於烘烤成形中所產生變異，來達到與離心製程下相同的結果，進而減少封裝時的螢光粉使用量，使封裝成本進一步降低。由實驗結果得到結論，使用熱板直接加熱於支架上，可使膠體於短時間內進行固化，在此方式進行下，修改螢光膠的螢光粉配比，可使其CIE位置於離心製程後相同，且在亮度與CRI比較上並無差異，因此採用熱板做為固化條件可有效降低螢光粉的使用，本文試驗在同色溫的要求下可降低5％的螢光粉使用量。
並列摘要
The LED lighting has become the main stream of the next generation's lighting source. As high efficiency has been emphasized nowadays the cost consideration is indeed one of the important factor that makes LED the main lighting source. Under the requirement of low cost, the cost for packaging is relatively more important as high illumination and CRI are being considered. In order to achieve a better efficiency, recent LED process introduces the centrifugal sedimentation process technology to accelerate the sedimentation of phosphor and shortens the process waiting time to reduce the packaging cost. However, the cost of introducing centrifugal process is the consumption of phosphor. According to the past studies, using the centrifugal process would consume 4% more phosphor under the same color temperature. As the packaging process emphasizes every bit on cost reduction, it is helpful for cost control if the phosphor usage could be reduced. This research took EMC 3535 as the lighting component for testing and studied on utilizing different conditions and measures for glue solidification in order to reduce phosphor consumption during packaging process and thereby reduce the packaging cost furthermore. From the test result we concluded that by using the hot plate to heat up the frame the glue could be solidified in a short time. Under such method by changing the phosphor proportion in the phosphor glue, the CIE position could be maintained the same after centrifugal processing and presents no difference in illumination and CRI comparison. Therefore, using the hot plate as the solidification method the consumption of phosphor could be effectively reduced. The test in this research showed that under the requirement of same color temperature it could reduce 5% of phosphor consumption
參考文獻
延伸閱讀
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