光電產業是現在的重要產業之一，而顯示器更是其中佔了比重相當重的一環。因為液晶是非自發光的，所以需要另外的光源，因此背光模組就成了顯示器相當重要的部份，也因為市場需求的不同，發展出不同的背光模組架構。

而背光模組在顯示器中佔很了重要的地位，但現今的側邊式的背光模組大多是使用鋪點或是類似的方式來達到出光面均勻的目標。在本文中，並沒有使用到鋪點的方式，而是全部使用鏡面反射來達成出光面均勻的目標，使用鏡反射可以降低光損失且較易於分析。

在本文中，使用了CCFL當側邊式背光模組的光源，而在達到均勻的目標這方面，並不是利用鋪點的方式，而是利用鏡反射來達到均勻的效果，如此可以避免光因為散射點而造成的光損耗。且最後分析的系統不僅僅適用於橢圓，也適用任何幾合圖形，只需設計將光線聚焦於同一點即可。

Display is among the most important in the nowadays significant opto-electric industry. Because the liquid crystal is not self-illuminated, it needs an outer light source to operate. Therefore, BLU is the most important part in LCD display and it had been developed several type of BLU carter to demand for market.

BLU (Back Light Unit) plays an important role in display. Most of edge lighting BLUs use dot patterns or similar ways to gain uniformity via scattering. In this article, we use mirrors to achieve uniformity. Mirrors reduce the energy loss of source and easier to analyze.

In this article, we employ the CCFL for light source of edge lighting BLU, and we use the specular reflection instead of dot patterns for uniformity. This method reduces the energy loss and is easier to analyze.
Although parameters (relative position,θ…) adjusting is necessary, the proposed system is suitable for any reflector. As long as the reflected rays are concurrent, the proposal design is independent of reflectors shape and will achieve more uniformity and reduce energy loss.

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