【摘要】 设计了一种数字在屏幕显示(On Screen Display,OSD)控制核,在水平和垂直扫描信号同步下,根据用户软件设置字符及位图的显示属性,合成OSD图像数据,与输入视频叠加显示.利用现场可编程门阵列(Fied Programmable Gate Array,FPGA)进行验证和性能测试,并通过温度实验,工作稳定可靠.将其应用于一款军用液晶显示器(Liquid Crystal Display,LCD),解决了实际问题.该OSD控制核的特点在于把基于字符和位图的两种OSD图像生成方法融合在一起,功能得到增强,生成了图文信息丰富的OSD图像,串、并行两种用户接口提高了系统兼容性.更多还原

【Abstract】 This paper discussed a design method of digital OSD(on screen display) controller.This OSD controller,synchronized with horizontal and vertical synchronization signals,operates the display property registers of characters and bitmap set by the user microcontroller application.The OSD image displays in LCD overlapping the input video signal,which is generated automatically by the image composition module.Logic functions and characteristics of this OSD controller are verified in FPGA(Field(Programmable) Gate Array).The results of temperature experimentation show that it can operate stably in-40～65(°C).This OSD controller is applied to a military LCD successfully.The characteristic of this OSD controller is combining the two methods of OSD image composition together,and the methods are based on the character and the bitmap.So the functions are enhanced and the OSD image contains more information of figures and characters,and the parallel and serial interfaces improve its system compatibility.更多还原