全彩色LED显示屏控制系统的设计与实现

gxm771208

摘要
LED 显示屏自问世以来，经历了飞速的发展，现今，全彩色 LED 显示屏已经成为了平
板显示器的一个重要产品。本文回顾了 LED 显示屏的历史，分析了其在国内外的现状和未
来的发展趋势。接着，本文叙述了全彩色 LED 显示屏的一般原理，就全彩色 LED 显示屏视
频信号的获取、灰度级的实现、刷新率、γ校正等方面作了详细的阐述，分析了以上各点的
实现方法及其对全彩色 LED 显示屏的影响和意义。本文重点探讨了 LED 场频、行信号串行
时钟、灰度级的实现之间的联系和相互的约束关系，给出了必要的推导公式，由此还提出了
一套全彩色 LED 显示屏的实现方案，并就此方案的许多细节作了详细讨论，而后又分析了
上述方案下的硬件板结构及其主要功能。最后讨论了数据重组的实现方法，并给出了实验中
的一些重要时序图。

目录
摘要...........................................................................................................................................1
Abstract .................................................................................................................................... II
第一章 前言.............................................................................................................................1
§1.1 行业背景.................................................................................................................1
§1.2 课题背景...................................................................................................................4
§1.3 论文工作...................................................................................................................4
第二章 全彩色 LED 显示屏基本工作原理...........................................................................6
§2.1 视频数据的获取.......................................................................................................6
§2.2 从 PC 机的显卡获取视频信号的方法 ....................................................................7
§2.3 LED 特性及一些重要参数 ......................................................................................8
§2.4 灰度实现.................................................................................................................10
§2.5 LED 驱动电路........................................................................................................10
§2.6 刷新率.....................................................................................................................12
§2.7γ校正......................................................................................................................13
第三章 总体方案论证...........................................................................................................16
§3.1 屏体大小及屏体结构.............................................................................................16
§3.2 LED 的场频............................................................................................................17
§3.3 灰度的实现方法.....................................................................................................18
§3.4 行信号串行时钟.....................................................................................................21
§3.5 存储器的选择.........................................................................................................23
第四章 硬件说明...................................................................................................................26
§4.1 DVI 接口板.............................................................................................................26
§4.2 扫描板.....................................................................................................................27
§4.3 分配板.....................................................................................................................28
第五章 数据组织...................................................................................................................29
§5.1 存储器分区.............................................................................................................29
§5.2 位分离的实现.........................................................................................................31
§5.3 反γ校正的实现.....................................................................................................31
第六章 实验分析...................................................................................................................33
§6.1 DVI 接口主要输出时序.........................................................................................33
§6.2 LED 屏扫描的主要时序 ........................................................................................34
第七章 术语解释...................................................................................................................37
§7.1 NTSC、PAL 和 SECAM 电视制式.......................................................................37
§7.2 VGA 接口 ...............................................................................................................37
§7.3 DVI 接口.................................................................................................................38
§7.4 LVDS.......................................................................................................................40
结束语.....................................................................................................................................42
致谢.........................................................................................................................................43
参考文献.................................................................................................................................44
附录一 DVI 接口板原理图...................................................................................................46
附录二 扫描板原理图...........................................................................................................47
附录三 分配板原理图...........................................................................................................48

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