微型LED投影機進出風口探討

Abstract

由於近年來投影機的發展趨勢已由大宗的商業應用市場擴展到家用市場，而隨著積體電路技術不斷持續進步，可將電子產品零件利用半導體技術將晶片體積縮小化，同時也推進投影機的發展技術，進而促成微型投影機之普及。 本研究探討微型LED投影機進出風口之熱傳系統規劃，在風扇的強制對流條件下，如何於微型投影機外殼的進出風口處，設計出較佳的開孔率設計值，與定義進出風口的最佳設計位置，再藉由風扇將投影機內部的熱源迅速排出，讓系統運作具有良好的散熱效率；而本研究之微型投影機為電子可攜式裝置，產品內設有一鋰電池裝置，故設計進出風口的開孔條件時，亦需注意產品機殼開孔尺寸之法規，定義出符合規範之開孔條件；本文研究方法及流程制定後，可成為建立相同類型產品之設計範本，以節省開發成本、簡化開發流程以及縮短開發時程。

Even though the market for projectors is dominated by corporate customers, it has recently expanded to include household customers. Moreover, because of continued advances in integrated circuits and semiconductor technologies, miniaturized electronic components and projection technologies have enabled the growing use of micro projectors. This study investigated heat-transfer designs for the air inlets and outlets of light-emitting diode micro projectors. Specifically, this study explored how to ensure the optimal air flow rates for inlets and outlets under forced convection generated by a built-in fan, identify the optimal positions for the inlets and outlets, and allow hot air to be removed efficiently from projectors. A portable electronic micro projector was used. This projector contained lithium batteries; aperture criteria for inlets and outlets were specified to satisfy the aperture requirements of the case. The heat-transfer design method and procedure demonstrated in this study can be used to improve the heat transfer characteristics of micro projectors, to reduce the cost of their development, and to simplify and expedite their development.