- 學位論文
PET基材塗佈遠離螢光粉封裝結構應用研究
Coating Phosphor Film with PET Substrate for Remote Type LED Package
摘要
全球暖化及能源耗竭的問題日趨嚴重，近年來世界各國皆提倡綠能環 保之政策，從早期的日光燈、鎢絲燈、霓虹燈，一直到現在眾所矚目的 LED(Light emitting diode LED)，現今綠能科技成為相當重要之研發課題。 近年來 LED 發光效率(luminous efficacy)及封裝技術不斷進步，白光 LED 的應用層面也不斷地在擴張，但發光效率及演色性(Color Rendering Index; CRI)一直還是業界研發之重點。高功率 LED 要打入照明市場，色彩問題勢 必需要妥善解決，但點膠製程(Dispensing Process)無法解決 LED 黃暈現象 與發光效率等問題，因此本研究預計開發在 PET 材上使用 Roll to Roll 塗佈 成型方式，達成高速且大面積製作螢光膜材，不僅能精準控制螢光膜材厚 度使單層厚度小於 200um，同時在螢光粉層亦可掌握粉層平整度，使光線 分布均勻，便可在光源本身直接解決因螢光粉所產生的黃暈，使 LED 燈具 在進行二次光學設計時，無須考慮消除黃圈的問題點，且更進一步降低空 間色偏差，達成均化白光等效果之目標。本研究先利用軟體模擬找出螢光 粉層濃度與層厚度最適用之數值，之後進行實驗實際封裝出 PET 螢光粉層，並進行光學特性量測。量測數據顯示，利用 R2R 薄膜貼覆於 LED 晶片 上方，使配光角度由 160 度縮小至 140 度，同時觀測到正向強度由 0.5cd 提 升至 0.52cd，強度提升 4%，使其同時兼具色彩均勻性及發光效率。在製造 成本上，R2R 法製備螢光粉層製程成本相對較低，對於 LED 燈具未來量產 及應用普及率上產生助益。
並列摘要
Global warming and energy depletion have become serious issues as human technology evolves. The high power efficient LED lighting adaptation is a global topic of discussion. The traditional LED production method using dispensing process still introduces issues such as CRI and luminous deficiency. This paper of study focuses on the new Role to Role coating phosphor method on the PET material to achieve high-speed and large-area production capability. This method can effectively correct the CRI(Color Rendering Index; CRI) issue and increase luminous efficiency. Simulation model is built for parameters used for this Role to Role coating method. Experiment is done on the coated phosphor BEF with the PET substrate after packaging. The measurement result is compared with the simulation data. The actual measurement result indicates two key performance improvements using R2R(Role to Role) coating phosphor method with PET substrate for remote type LED packeage. Light distribution angle is narrowed from 160 degree to 140 degree and the forward light intensity is enhanced by 4% from 0.5cd to 0.52cd.This Role to Role coating method on LED production can greatly reduce cost. It can also be adapted for mass production and help to accelerate the LED lamps into more market penetration.