ABSTRACT
This topic is based on the 8*8 LED dot matrix, design of 16*16 LED dot matrix display, by control the MCU and drive circuit of LED, to enable it to achieve better characters and simple graphical display effect.
This thesis describes structural characteristics, power and control display characteristics of LED dot matrix , besides this thesis also introduced the connect of local circuit, on the basis of know the details about the hardware , through the analysis of the functional modules of the system, in order to achieve the programming the LED dot matrix display control based on the MCU system .
At the end of this thesis,there are the design of the simulation results and the programming procedures, even given the issues which need to be improved in the design of electronic circuits in the LED production
Key Words: MCU; LED dot matrix; drive circuit of LED
目录
摘要 I
ABSTRACT II
第1章 引言 1
1.1 LED点阵的发展历程 1
1.2 LED点阵技术的进展 3
1.3 LED点阵产业的市场前景 3
第2章 LED点阵驱动电路 5
2.1 LED点阵简介 5
2.1.1 LED点阵的结构特点 5
2.1.2 LED点阵的发光原理 6
2.1.3 LED点阵的分类和电源性能 7
2.2 LED点阵连接方式 9
2.2.1 串联驱动 9
2.2.2 并联驱动 10
2.2.3 混联驱动 12
2.3 LED点阵的扫描和显示方式 13
第3章 点阵控制的结构分析 15
3.1 系统总体分析 15
3.2 单片机电路分析 15
3.2.1 单片机系统电路 15
3.2.2 单片机管脚说明 16
3.2.3 单片机系统电路连接 18
3.3 驱动电路 19
3.3.1 74HC595芯片 19
3.3.2 行驱动电路的连接 21
3.3.3 74HC154芯片 21
3.3.4 列驱动电路的连接 22
第4章 点阵显示控制程序 23
4.1程序流程图 23
4.2 PROTUSE仿真图 24
第5章 结束语 25
谢致 26
参考文献 27
附录1 电路原理图 28
附录2 源程序 29
