无机EL显示模块控制电路设计

【作者】 于涛；

【导师】 陈泽祥；

【作者基本信息】 电子科技大学 ， 光学工程， 2008， 硕士

【摘要】 随着平板显示技术的崛起和日趋成熟,平板显示器件正逐渐代替传统的CRT显示器件。无机EL显示器件是一种全固态的平板显示器件,它的结构简单,它具有主动发光、视角宽、对比度高、响应速度快、使用温度范围宽、坚固性好、寿命长等诸多优点,在军事工业以及环境恶劣的场合有着广泛应用。本文首先叙述了平板显示技术的发展现状和前景,接着从基础知识入手,介绍了无机EL的发光机理、平板显示驱动的原理和基本的电路构成以及显示系统和灰度调制方式等相关理论。在此基础上,详细阐述了一种无机显示模块控制电路的设计过程。该控制电路是基于Planar公司的EL640.480-AF1无机显示模块,使用FPGA设计完成的。设计的最终目的是使该显示模块可用作计算机终端。电路设计包括软硬件两部分。软件方面包括两部分。一部分是针对FPGA,将整个电路分为3个模块,分别是:数据处理模块、存储器时序发生模块和显示模块时序产生模块,利用QuartusⅡ软件,分别对三个模块进行编程和仿真;另一部分是利用单片机8051,对DVI解码芯片进行控制。硬件部分包括DVI解码芯片、FPGA、电平转换器等,设计步骤主要包括硬件电路的设计、PCB板图的绘制以及电路调试几个部分。最终,将经过调试的电路连接至计算机和显示屏上,可以实现VGA、SVGA和XGA三种信号格式的自动识别,并稳定实现了显示屏对计算机显示内容的实时灰度显示。本控制电路还可控制彩色EL显示器实现彩色显示。更多还原

【Abstract】 With the rising of flat panel display technology, flat panel display is gradually replacing the traditional CRT display. Inorganic EL display is an all-solid-state flat panel display with simple structure, the characteristics of inorganic EL display presents many merits such as self- luminescence, wide visual angle, high contrast, fast response, widely using temperature range, good firmness, long life time and so on. Because of the above reasons, inorganic EL display has a wide application in the Military Industrialization and some places with bad environment.This dissertation described the development of flat-panel display technology firstly, and some basic theory such as the luminescence mechanism of inorganic EL, flat panel display driver theory, the basic principles of the circuit, the display system, the gray modulation and so on. On this basis, the control circuit for an inorganic display module is designed. The control circuit is designed based on FPGA for the EL640.480-AF1 inorganic display module making by Planar Company. The display module was desgiend for computer terminal aplication.The Controller includes hardware and software. FPGA unit comprises three modules: data-processing modules, memory modules and timing module for display, using QuartusⅡfor programming and simulation, and the DVI decoder chip which received the DVI singnal from the computer display card was controled by 8051 MCU. The design process of the hardware part, which includes FPGA, DVI decoder chip, the voltage transceiver and so on, includes designing hardware circuit, drawing PCB and debugging circuit.Finally, the prepared controlled in this dissertation is able to distinguish adaptively VGA, SVGA and XGA graphic formats, and achieves successfully the EL module real-time gray-scale display of those graphic formats above mentioned. The controller can also achieve color display with color EL display.更多还原