LED(發光二極體)因壽命長、低耗能、無污染之特性，被大量運用於大型顯示看板、交通號誌燈、城市照明等領域。而LED的品質(尤指亮度與色度)之均勻度亦直接決定了顯示看板的品質。
在每個LED模組裡，各個LED的亮度與波長都會有些許差異，為了彌補這種差異，通常採用兩種方式：一是選用經過匹配的或經過篩選的LED；二是設計具有亮度補償並採用帶有“點校正”功能的驅動IC。
本論文主要探討如何選擇LED之製程參數以提高其模組的品質；文中運用田口實驗設計方法(L8)來找出LED亮度及波長參數之最佳化組合，以達到提升模組之光學均勻度的目標。經實驗驗證，模組均勻度自原設計之72.45%，提高為86.77%，提升了14.32%。希望可以豐富大型LED顯示系統之色彩表現。

Due to the characteristics of a LED, (Light Emitting Diodes), such as long lifetime, low energy consumption, and no pollution etc, LED panel is massively utilized to the large-scale full color display systems, traffic lights and city illumination. However, the brightness and the chromaticity uniformity quality of a LED panel had directly decided the display quality of a full color display systems.
Inside each LED module, the brightness and wavelength of each LED dot (also is called pixel) may have the trifle difference. In order to make up this kind of difference, two methods are usually selected. The first method is to select the matched or screened LEDS. The second method is to design a driver IC. with the brightness compensation for each pixel in LED module.
This study focused on how to choose the process parameters of a LED,which includes the LED brightness, the wavelength . In addition to of a 16x16 LED module were studied in ambient temperature(25℃) of optical characteristics.
The Taguchi Experimental Method was used to obtain the LED brightness and the wavelength the parameter optimization and enhance the optical uniformity by of a LED module.
From the experiment of results, the display uniformity of a 8x16 LED color module, which uniformity was 72.45%, has been enhanced to 86.77%. Therefore, this method may improve the performance of a large-scale LED display systems.

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