一种多图层液晶控制器的设计与实现

嵌入式系统中,液晶显示器的应用十分广泛,但是多数液晶控制器的性能并不高,显示过程中需要占用大量的与其接口的MCU的时间,因此提高液晶控制器的性能有助于降低系统对于MCU的性能要求,从而节省成本并增大了MCU的选择范围。目前嵌入式应用中的液晶控制器,将全部显示存储空间都划分成一个显示空间,在显示动态画面时,需要执行大量的画面备份与恢复工作。本文提出一种将显示内容分层的思想,将静态与动态画面分多层显示,能够降低30%以上的MCU接口工作量,使得这种新型液晶控制器非常适合于嵌入式应用领域。

Design and Implementation of an Multi-Layer LCD Controller

LCD display is widely used in embedded system, but the performance of much LCD controller is not high,and it occupys much of MCU time. So improving performance of LCD controller is helpful to reduce performance requirements of MCU,which decreases cost and increases selection range of MCU. Much of present LCD controller in embedded system take display memory as one space,during dynamic image change,this kind of LCD controller will execute much of bakup and restore. This paper presents a multi-layer LCD controller,which divides display content to several layers.This can decrease more than 30% workload,which make it very suitable in embedded system.