高功率LED光源技術擁有省電、環保及壽命長等優點，且發光效率不斷提升，而熱的問題乃是高功率 LED的重要議題， LED驅動時的溫度效應更是散熱設計技術上非常重要的一環。本研究將針對高功率LED的溫度效應進行探討，藉由LED產品之加熱與利用積分球量測系統，可測出高功率LED在不同環境溫度所產生的溫度效應。首先由可控制恆溫烤箱進行加熱(25℃∼70℃)，搭配溫度監控器監測溫度變化，再由驅動電流變化可測出LED環境溫度隨變化的光學特性關係，包含發光效率、色度偏移等特性。
本實驗結果發現，隨LED溫升，兩款RGB-LED之光通量均降低，甚至到高溫時會有明顯色度飄移現象。樣本A主波長及峰波長往長波長移動，樣本B主波長及峰波長則較不受溫度所影響，色度則是向左下移動。電壓及電流方面，隨LED溫度升高而產生不穩定飄移，最後再呈現數據圖和數據表相互比較，可見溫度對現階段高功率LED之應用還是值得探討。

High power LED light source technology has advantages of powersaving, environmental protection and long lifeetc. As the luminous efficiency has been improved, and the most important issue of high power LED is the heat problem. The thermal effect of LED design on thermal diffusionismost important part.Therefore, this study investigatesthe temperature effect of high-power LED display. A temperature controllable heating oven is used to heat the high-power LED sample. Then, the high-power LED sampleis moved to an integrated sphere anddriven by different current under different temperature records(25℃∼70℃). The output characteristics are measuredand the temperature effect of High-power LED with different ambient temperatures can be obtained. The considered optical characteristic includes Luminous efficiency and color drift etc.
The experimental results indicate that when the LED temperature has been increased, two different types of RGB-LED's luminous flux were decreased. When it approachesto a higher temperature, there is a significant color drift. Besides,the dominant and peak wavelengths are moved toward long wavelengthfor sample A.For Sample B, the dominant and peak wavelengths are less influenced by temperature effect. The chromaticity is drifted to south-west side, and relations between voltage and current become unstable drift asthe LED temperature increases. In conclusion, according to the data charts and datasheets, the research for the change of working temperature of a high power LED is still worth forindustrial applications.

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