Research on Omnidirectional decorative of LED bulb
碩士 === 國立中央大學 === 機械工程學系在職專班 === 102 === This thesis is to design the Light Emitting Diode Candle light to replace the 40 W 300 lm incandescent lamp. The LED candle light has a small size which will increase the difficulties in designing for light shape, electricity circuit , and heat sinking. The t...
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| Format: | Others |
| Language: | zh-TW |
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2014
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| Online Access: | http://ndltd.ncl.edu.tw/handle/50094402361714966509 |
| Summary: | 碩士 === 國立中央大學 === 機械工程學系在職專班 === 102 === This thesis is to design the Light Emitting Diode Candle light to replace the 40 W 300 lm incandescent lamp. The LED candle light has a small size which will increase the difficulties in designing for light shape, electricity circuit , and heat sinking. The three-dimensional heat sinking structure is able to transmit the heat effectively from circularly arranged LED chips mounted on copper dissipate to the thermally plastic of the LED’s candle light mount, and then dissipate the heat to the external air thermal radiate on from the plastic. The luminous intensity will be reduced by using optical lens for the flat LED arrangement to change the optical distribution curve. The three-dimension structure can avoid this optical loss sample by adjusting the angle of copper mount to change the light distribution. We used optical and thermal simulation softwares to analyze the light distribution and heat dissipation to find a optimal design for need. Finally a sample was made to verify the design. At 4.69W input, the measured highest temperature is 77.4°C. It predicts that LED’s the highest junction temperature is 87.5°C with 402.8 lm and the highest half power angle of luminous distribution curve is 270°. It achieved expected result. The LED bulb specification can be further optimized based on our result.
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