彩色点阵显示屏设计 毕业论文

摘  要

OLED器件具备高亮度、重量轻、厚度薄、响应迅速、清晰度高、功耗低等优点。随着人们的环保节约意识逐渐提高，OLED显示设备得到了更多关注，具有广泛的工程应用前景。

本文以级联型可编程灯珠作为研究对象，对点阵屏驱动原理、图像显示原理和显示系统进行较为全面的分析和研究。硬件方面，以STM32单片机作为主控，选用可编程灯珠作为发光元件。在软件方面，基于FATFS文件系统对存储在TF卡中的图片内容进行读取，并通过DMA+PWM的方式驱动发光元件，完成字符与图片的显示，并取得良好的显示效果。

实验结果表明，所提出的级联型OLED点阵屏相对传统的行列驱动点阵屏，使硬件设计和软件开发的复杂度和开发周期缩减，在一定程度上降低了经济成本，具有良好的工程应用价值。

关键词：OLED；显示系统；点阵屏；STM32

Abstract

OLED devices have the advantages of self-luminescence, high brightness, light weight, thin thickness, rapid response, high definition and low power consumption. With the gradual improvement of people's awareness of environmental protection and conservation, OLED display devices have attracted more attention and have a wide range of engineering application prospects.

In this paper, cascading programmable lamp bead is taken as the research object, and the driving principle, image display principle and display system of dot matrix screen are analyzed and studied comprehensively.

In terms of hardware, STM32 single-chip microcomputer is designed as the main controller, and SK6812 programmable lamp beads are used as light-emitting components. In terms of software, the SK6812 device is driven by DMA+PWM. STM32 reads the TF card picture information based on the FATFS file system and displays it on the OLED dot matrix screen. Realized the display of Chinese characters and static pictures,and achieved good display results.

The experimental results show that the proposed cascaded OLED lattice screen can reduce the complexity and development cycle of hardware design and software development, reduce the economic cost to a certain extent, and has good engineering application value compared with the traditional column driven lattice screen.

Keywords:  Lattice display screen；Lattice Screen；STM32

目    录

1  绪论

1.1 研究背景及意义

1.2 国内外发展及研究现状

1.3 本文主要内容

2  整体方案设计 4

2.1 系统概述

2.2 方案设计

2.3 方案论证

3  硬件电路设计

3.1 硬件概述

3.2 控制系统

3.3 点阵电路

3.4 存储器

3.5 无线传输

3.6 信号采集

4  软件程序设计

4.1 系统基本框架

4.2 屏幕驱动模块

4.3 TF卡图传模块

4.4 无线功能模块

4.5 时钟功能模块

4.6 频谱功能模块

5  系统整机调试

结  论

谢  辞

参考文献

附  录