本論文主旨為研究高亮度兼具高效率及散熱佳之白光LED燈具，以取代現今市面傳統照明產品。論文首先探討若干關於白光LED之論文文獻，比較發光效率最高的白光LED產生方式，接著運用LED陣列知識，提出模型LED燈泡之製作構想，並進行量測以驗證可行性。目前商品化白光LED照明燈具發光亮度600流明以上者，發光效率約略在輸入每瓦電功率下產生60至70流明。本論文運用白光LED陣列方式，實驗以輸入電功率5瓦時可產生355流明，即發光效率為每瓦電功率下產生71流明之白光LED製作出模型燈泡，使模型燈泡排成3×3陣列時產生總亮度超過800流明；另運用最佳化的輸入功率，優化白光LED模型燈泡使輸入每瓦電功率下產生85流明左右亮度。關於散熱議題，市面上高亮度白光LED照明燈具對熱的處理多是採用鰭片散熱式，而本論文以較全面之系統觀念從熱管理方式出發，一方面避免模型燈泡高熱密度產生，另一方面則運用類似熱導管概念，使用不導電的去離子水於密閉空間內與白光LED熱點接觸，迅速將熱帶離熱點區域，以使得白光LED持續工作於容許溫度範圍內，達到較完美的效果並可增加燈具壽命。從發光效率對輸入功率曲線比較未加散熱燈具與使用論文散熱裝置燈具，可得工作30分鐘後使用散熱機制之燈具發光效率可維持在80(lm/W)上下，而未使用散熱機制之燈具發光效下降為70(lm/W)。運用本構想將有助LED燈具朝高發光效率及高功率發展，以利LED燈具取代傳統燈具。

In this thesis, we focus on the subject of improvement of luminosity efficiency and cooling ability of heat dissipation for white light LEDs lamp. The purpose is to replace the conventional lamp. At beginning, we focus on the researches to achieve high luminosity efficiency of commercial white light LED. The study leads us to propose a concept of making a light bulb by a 3×3 LED array. A prototype is made. A serious measurement is performed to validate the concept. At present, the efficiency is about 60 to 70 lumens per watt for the commercial white light LED lamp with luminosity more than 600 lumens. For our 3 × 3 LED array bulb it can produce luminosity as high as 800 lumens. This new model can achieve light efficiency about 85 lumens per watt with the optimized input power. As regard to the heat issues, the common way to dissipate heat is heat-sink-fin, however we put the heat issues in a more comprehensive concept of systematic management of the hot spot. Not only we avoid the light bulb model producing high heat density, but also we use a similar concept of heat pipe to use non-conductive deionized water in a sealed space to contact white light LED hot spot. It rapidly takes away the heat from LED, enabling the white LED to continuously work on allowed temperature range, achieving a more perfect result and increasing the lamp lifetime. From the curve of efficiency, we compare the results of LED lamp with and without cooling mechanism and reach the conclusion that the lamp with cooling mechanism can maintain the efficiency of 80 lumens per watt and the lamp without cooling mechanism reduces to 70 lumens per watt after powered on 30 minutes. We verify that we can make a high power and high
efficiency LED lamp to replace the commercial fluorescent lamp.

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