LED散熱設計之最佳理想，是能使LED在安全操作溫度範圍下長時間點亮使用，而不影響發光特性及使用壽命，且也為了LED燈全面普及化，故在價格與外型上需更加親民。本論文針對市售LED金屬散熱器做改變，讓低成本與塑型度高的導熱塑膠材料成為高功率LED燈泡之散熱器所使用。
本研究將利用不同基板與LED導熱塑膠散熱器做散熱實驗與模擬。為了讓實驗結果不受熱阻的影響，在進行高功率散熱實驗前，需先將LED高導熱塑膠散熱器與三組不同的基板(石墨、銅、鋁)作最佳扣具壓力的量測。第一步驟，將導熱塑膠散熱器搭配不同的材質基板(銅、鋁、石墨)做高功率10W的散熱實驗；第二步驟，將實驗取的量測溫度點與模擬軟體COMSOL做相互驗證並建立出正確模擬燈具熱傳遞情形的計算流程，最後以此計算流程與現今市售的高功率LED 燈泡燈殼外型作結合，預得出較佳的導熱塑膠散熱器之最佳LED燈泡。
實驗結果顯示，針對導熱塑膠散熱器內加裝U型熱導管 ，其溫度有明顯下降約2~3℃間，這就表示讓熱導管加入，讓導熱塑膠散熱器是可以增加散熱之效能。

Under the safe operating temperature range, the ideal design for the LED heat transfer is not to make the long time use of LED affect light-emitting intensity and service life. Besides, to get the LED popular, the price and the appearance need to be close to people’s need . In the thesis, it is to analyze the heat transfers in the heat sink of the LED bulb, which is made of the plastic material of low cost and good thermal conductivity. The analysis is also made on the metal heat sink of the commercial LED bulb, whose results are compared to those of the plastic ones. In the study, the experimental and numerical methods are used to analyze the heat dissipation of the heat sinks with different substrates.
The first step is to make the heat transfer tests for the plastic sink with three different substrates of copper, aluminum and graphite, using 10W power applied to the heater placed under the substrate. The second step is to use the software COMSOL to analyze the temperature fields and estimate the convection heat transfer coefficients of the sinks by comparing the measured and calculated temperatures. The third step is to make the same analysis as stated in the last step to the commercial metal sinks. From the analyses stated above, the comparisons are made among the results of different combinations of heat sinks and substrates.

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