动态模拟视频图形阵列信号的系统和方法

A System and Method for Dynamic Analog Video Graphics Array Signals

近年来,VGA接口已成为现代个人计算机领域应用最为广泛的视频显示输出接口,英特尔或超微公司在设计VGA接口时将该接口设置为空载,即没有显示器设备接入的时候无信号输出。此时再接入显示器,常常导致图像信号输出不及时或不输出图像信号,所以目前行业通常使用模拟负载方式让VGA接口在即使没有接入显示设备的情况下仍能够一直输出图像信号。本文提出一种动态模拟视频图形阵列信号的系统和方法,不需使用VGA接口的针脚接入模拟负载,提高了输出图像的质量,且动态模拟负载使负载加载时间短,降低了模拟负载对VGA驱动模块的影响几率。

In recent years,VGA has become one of the most extensively-used video display output interfaces in modern personal PC field.When designing VGA port,Intel or AMD Inc usually sets it to no-load,i.e.,there is no signal output when no display device is connected.With this setup,when the display device is connected,image signal often cannot be output timely or even no image signal can be output,so the current practice in the industry is to use analog load method,to make VGA port constantly output image signals even no display device is connected to the VGA port.This article presents a system and method for dynamic analog video graphics array signal,without the need to connect the pins of VGA port to analog load.This system and method improves the quality of the image output,shortens the loading time by dynamic analog load,and reduces the possibility of negative effect of analog load on the VGA driver module.