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1、 编号 毕业设计说明书题 目： 旋转旋转 LEDLED 显示屏显示屏 摘摘 要要LED 显示屏已广泛应用于广告、车站、银行、商场等公共场所，它具有功耗小、寿命长、色彩好等优点。现在的 LED 显示屏的发光器件主要采用 LED 平板模块，这种类型的显示屏主要有两个问题有待改进：首先是整个显示屏全由 LED 模块组成，器件数量多，成本高；另外，由于显示屏是一个平面，同时 LED 象素点有一定视角限制，使显示屏的可视范围被局限到正面某个范围之内，在应用中使显示屏的信息发布受到了一定的空间限制。本文给出了一种新型的柱式旋转 LED 显示屏，以旋转扫描方式代替逐行扫描，可视范围达到了 360 度，成本大
2、大降低，克服了 LED 平板显示屏的不足。本文在简要介绍旋转 LED 显示屏工作原理的基础上，详细说明了旋转显示屏的方案选择和系统结构设计，以及具体硬件电路和软件设计流程。在此基础上，本文还讨论了旋转 LED 显示屏设计中需要注意的一些关键问题，给出了相应的解决方案，并提出了一些改进和完善本系统的思路和设想。实际制作的 LED 旋转显示屏技术参数的测试结果，以及实际的运行效果表明，本文设计和制作的旋转显示屏符合设计要求，具有一定的创新性和实际应用价值。关键词：LED 显示屏；旋转；重心调节；nRF401AbstractLED display has been used widely in ad
3、vertising, stations, banks, shopping malls and other public locations. It has a lot of advantages, such as low power, long life and nice multicolor. LED flat-panel module is used mainly in the LED display devices, which has some issues to be improved. First, the entire LED display area makes up of a
4、 number of LED modules, which results in high cost; Secondly, the LED display is flat, and then the information promulgated on the LED display is restricted by the visual angle of display self.A novel column revolving LED display is introduced in this article, which using revolving scan mode replaci
5、ng progressive scan, then advances the visual angle to 360 degrees, and reduce the cost greatly. On the base of introducing the working principle briefly, the project choice and system configuration of the revolving LED display are shown in this paper, and the hardware and software of the system are
6、 introduced in detail. Otherwise, some of the design keys of the novel LED display are discussed, and some improved steps are given in the paper.The performance and the technical parameters measured by metrical instrument show that the system meets the design requirements. Therefore, the novel LED d
7、isplay has some creative design and applied value by all means.Key words：LED Display, Revolving, Focus adjusting, nRF401目 录引言.1 1 系统设计.21.1 系统的设计目标 .21.2 总体设计.2 2 方案论证.22.1 系统供电方案 .22.2 LED 驱动芯片选择 .32.2.1 LED 驱动芯片选取原则 .32.2.2 LED 驱动芯片接口电路设计 .32.3 单片机其他外围电路 .32.3.1 通讯模块选择.32.3.2 电机选择.3 3 LED显示技术及系统中的
8、主要芯片.43.1 LED 以及旋转 LED 显示屏简介 .43.1.1 LED 应用简介 .43.1.2 旋转 LED 显示屏简介 .53.2 MAXIM6969 LED 驱动芯片 .63.3 AT89S52、nrf401 无线收发芯片简介 .83.3.1 AT89S52 芯片介绍 .83.3.2 nRF401 无线收发芯片 .8 4 系统硬件设计.94.1 各功能实现原理.94.1.1 系统供电.94.1.2 重心调节.94.2 具体硬件电路实现.104.2.1 电源设计.104.2.2 LED 旋转同步设计 .10 5 系统软件设计.115.1 系统编程语言和编程工具.125.2 软件总体设计.135.3 系统各模块程序的设计.135.3.1 主控机程序模块.135.3.2 从机程序模块.14 6 系统调试.156.1 元件的焊接和整板测试 .156.2 系统硬件调试 .166.3 软件测试 .166.4 系统联调 .17 7 结论.18 谢辞.19 参考文献.20 附录.21引言由于物理学的重大突破，电子技术在20世纪取得了惊人的进步。特别是近40年来，电子技术的发展突飞猛进，无论是工业、农业，还是国防领
