本論文主旨在討論視頻訊號，經由電腦圖形處理系統傳送到液晶顯示器中，所產生的電磁干擾的問題。透過實驗量測中發現，使用不同的測試程式會產生不同的頻率分佈與輻射強度，因此本論文將針對實際上慣用的測試程式作為分析、設計及歸納出主要影響的因素。其次，針對顯示在螢幕上不同的模式之字型結構與字體大小進行MATLAB的模擬，對照實際測試探討其相關雜訊輻射的影響效應。另外，由於電腦發展不斷地更新，而新一代的作業系統也相繼上市，常用的EMI測試程式無法立即相容於該系統。本研究對於上述問題作探討，透過模擬與實測結果，重新定義顯示在螢幕上的模式，再結合ACDSee的共享軟體2.2.2版本，完成本研究建議的測試程式。經過實測數據驗証下，本研究的測試程式可以100%檢測出產生輻射的頻率，符合實際EMI測試與作業系統相容性的需求。

The purpose of this paper is to discuss the video signal processing system by computer graphics to the liquid crystal display generated by issues of electromagnetic interference. Through experimental measurements found that the use of different testing programs will produce different frequency distribution of radiation intensity. Therefore, this paper will test the program actually used for analysis, design and summarized the main factors. Next, for display is in different display modes of fonts of different model structures and font size for the simulation of MATLAB. In addition, the development of the computer upgrade, and a new generation of operating systems also has been launched, so the commonly used in EMI testing programs do not immediately compatible with the system. This study was to research the above-mentioned issues, through the simulation and measured results, re-definition display on the screen mode. Then combined with ACDSee software free(version 2.2.2.) and the completion of this study to test the proposed program. After verification of the measured data, the test program of this study can detect 100% of the frequency of radiation produced in line with the actual EMI testing and operating system
compatibility requirements.

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