分析了目前显示市场上各种主流显示器件的特性，介绍了OLED显示模块以及S3C2440的结构。针对OLED显示模块中8位数据并行接口占用I/O管脚较多，接口设计繁琐，无法满足系统需求的情况，采用SPI总线接口，进行相应的软件、硬件设计，达到了系统节约接口的要求。在占用资源较少的情况下实现了OLED屏幕的正常显示。

The characteristics of main display devices in the current market is analyzed. And this paper chooses the OLED display module, based on the general requirements of the S3C2440-based-system and the advantages and disadvantages of the display devices above. By analyzing the structure of S3C2440, this work uses SPI bus interface to solve the problem that the 8-bit parallel interface take too many I/O pins. Through the design of the hardware and software, the design meets the demand of the system saving interfaces, and achieving the OLED screen display module application on the condition.