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  • 學位論文

白光發光二極體色彩表現穩定技術之研究

The study for stabilization of color performance of white LEDs

指導教授 : 楊宗勳 孫慶成
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摘要


本研究目的在於探討熱對藍光晶片搭配螢光粉之白光發光二極體(pc-LED)的影響,主要透過對一藍光晶片之輻射頻譜,其峰值波長在YAG的激發頻譜高峰左側,晶片受熱後,其輻射頻譜會紅移往YAG螢光粉之激發頻譜高峰靠近,如此會令更多藍光被 YAG激發出來,因此使轉換出來的黃光增加 ; 另一方面,螢光粉受熱會有熱衰現象,導致藍光被轉換之效率變低,這兩個因素相互作用的影響下,藉由評比色溫與色座標的漂移量降至最低、甚至幾乎不動,研究藍光晶片搭配YAG螢光粉能夠達到色彩穩定技術之條件,並透過實際封裝來進行分析與驗證。

並列摘要


In this study, the thermal effects on LED color performance, such as CCT and chromaticity coordinate, were studied. As the temperature rises , the spectrum of bare chip will red shift that will let the efficiency increase or decrease. This phenomenon will be helpful to compensate the decay of the yellow light which results from thermal quenching, and it will achieve the stability of color performance. The purpose of this study is to achieve the minimum deviation of CCT and color coordinate by combining the bare chip with specific peak wavelength and phosphor YAG. In the end, based on the result of packing, we analyzed and verified our hypothesis.

參考文獻


[19] 陳正健,白光LED封裝光學品質之研究,國立中央大學光電所碩士論文,中華民國九十七年。
[41] 紀葦世,高效能 YAG 螢光粉之特性量測與模型,元智大學光電所碩士論文,中華民國九十九年。
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被引用紀錄


詹盈盈(2015)。白藜蘆醇與白藜蘆醇苷在酒精模式溶液中的穩定性〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2015.00859
鄭翰翔(2014)。白光LED加速老化之光輻射特性之研究〔碩士論文,國立中央大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0031-0412201512011212
楊上賦(2015)。白光 LED 老化致藍光漏出與其抑制之研究〔碩士論文,國立中央大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0031-0412201512092954

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