大型 LCD 面板解决方案—Ameya360电子元器件平台

Release time：2019-08-20
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source：Ameya360
reading：1974

1、 前言

LCD 的构造是在两片平行的玻璃基板当中放置液晶盒，下基板玻璃上设置 TFT（薄膜晶体管），上基板玻璃上设置彩色滤光片，通过 TFT 上的信号与电压改变来控制液晶分子的转动方向，从而达到控制每个像素点偏振光出射与否而达到显示目的。

大型 LCD 面板解决方案—Ameya360电子元器件平台

随着显示屏技术的不断发展，真彩液晶显示屏以其高分辨率、高对比度及高清晰度等优势逐渐在嵌入式显示系统中占据重要地位。目前，基于嵌入式平台的 LCD 显控技术的实现主要有两种方式：ARM 内嵌 LCD 控制器和独立的控制器件。但是这两种实现方式都存在着不足之处，内嵌控制器的使用可能增大处理器的负担和限制显示帧率，而外部控制器件不仅成本高，而且专用性比较强，很难适应不同类型的液晶屏。

2、 方案概述

Ameya360 大型 LCD 面板解决方案在 FPGA 内部的时序发生电路所产生的时序控制信号作用下，LCD 控制器通过 Framebuffer 接口从微控制器读出显示所需的数据存入显示缓存 SRAM 中。同时 LCD 显示屏从显存 SRAM 中读取显示数据，并通过数据格式转换电路直接将数据信息实时显示。


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