Software realization of LED Large Screen Display Offline Control card needs much complex work compared with that of video card.

相对于LED大屏幕显示器视频控制卡，脱机控制卡在软件实现上需要做较多复杂的工作。

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As the key of controlling LED screen to display video and data, LED screen controller is the core of the whole LED display system.

LED显示屏控制器作为控制LED屏显示图像、数据的关键，是整个LED视频显示系统的核心。

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The thesis focus on controlling full color LED screen synchronously, controlling LED screen to display video in a fixed position of upper computer synchronously.

本文研究的是对全彩色同步led屏的控制，控制LED屏同步显示在上位机显示系统中某固定位置处的图像。

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