毕业设计（论文）--旋转LED显示屏.doc

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毕业设计说明书
题目: 旋转LED显示屏

院(系): 电子工程学院
专业: 电子信息科学与技术
学生姓名:
学号:
指导教师:
职称: 讲师
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题目类型: 理论研究实验研究工程设计工程技术研究软件开发
2008年 6 月 6日
摘要
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;nRF401
Abstract
LED display has been used widely in advertising, 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 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 replacing 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 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 display has some creative design and applied value by all means.
Key words:LED Display, Revolv