本研究之目的乃針對液晶電視背光模組之散熱能提升，藉由模擬分析及實驗測試之結合，改良設計以獲得高性能、高亮度的背光模組。液晶顯示器本身有厚薄度、高亮度與質量輕等多項優點，如何得到更好的顯示效果，開發高亮度、高均齊度、省電及輕薄的背光模組系統是非常的重要。在背光模組中，燈管成本是產品開發時非常重要的考量項目，如何在確保性能下，尋求各部材的節省，是在面板業中必須不斷突破的項目。
由於電腦科學的發達，許多模擬軟體已經可以解決產品開發設計階段時會碰到的許多現實上的問題，可省掉不必要的嘗試錯誤及成本的浪費。本論文理，我們利用Flotherm模擬軟體，研究直下式設計時，LCD TV之燈管特性、數量與位置分配，對於整體產品熱性能的影響，並同時利用點線面彩色分析，在10 nits以下的暗室環境內，針對背光模組的亮度、垂直，水平均勻度做整體的分析，以得到90%以上的均齊度。藉由燈管數量減少及位置的變更以達到散熱性能的提昇，並藉由模擬分析及實驗測試之結合，改良設計以獲得高性能、高亮度的背光模組。

Compared to conventional CRT TV, LCD TV has many advantages, such as thin thickness, light weight and high brightness. In order to be competitive in the LCD TV industry, the cost and performance of the backlight unit for the LCD TV is of main concern to its design team. The purpose of this project is to develope a new design on the simplification of the lamp structure of the back light unit of a LCD TV and to investigate its effect on the thermal and optical performance of the system. Computer-aided engineering software, FlothermTM, is employed to obtain the velocity and temperature field of the backlight unit. The temperatures at 9 critical points of the system were monitered numerically and experimentally, and the comparison between the shows good prediction ability of the CAE code. It also shows that the simplified lamp structure of the new design can meet the thermal criteria required. The optical performance of the new design was analyzed by using a CCD camera optical instrumental system to measure the brightness, and the vertical and horizontal bright uniformly of the LCD panel. It is found that the optical requirement of over 90% uniformity on brightness can be meet by the new design, and the optical response time of the new design is even better than the original design.

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