What is VGA Interface

Q : VGA interface is the main application of what is ?

A: When it comes to VGA port, I believe many of my friends are not unfamiliar , because this interface is the main interface on the computer monitor , starting from the huge bulky CRT monitors era , VGA interface is being used, and has been in use ever since ,16x2 oled in addition to VGA Interface also known as D-Sub connector.
VGA interface is a D -type interface , a total of 15 pinhole above , divided into three rows, each row of five . Wherein , in addition to 2 NC (NotConnect) signal , 3 and 5 show the data bus signal GND , the more important is the three RGB component signal and two color scanning synchronization signals HSYNC and VSYNC pin . VGA color components using the RS343 interface level standards. RS343 level standard peak voltage of 1V. VGA graphics card interface is the most widely used type of interface , the majority of graphics cards with such an interface . Some graphics without VGA interface and with DVI (DigitalVisualInterface Digital Video Interface ) graphics interface can also be through a simple adapter to convert DVI interface VGA interface , VGA interface will not usually comes this adapter .

Many people think that only the HDMI interface to transmit high-definition signals to , but this is a very easy access to all misunderstanding , because the VGA connection can also display 1080P image resolution can be even higher , so use it to connect a display device Watch the HD video is not a problem , and although it is a kind of analog interface , but because of VGA video signal is decomposed into R, G, B primary colors and HV transmission line field signal , so the loss in the transmission is still quite small.

VGA interface Cause: graphics processing information will eventually be output to the monitor , video card output connector is a bridge between the computer and the monitor , which is responsible for the display output corresponding to the image signal .graphic oled module CRT monitors on the design and manufacture of reasons , can only receive analog signal input , which requires video card can output analog signals. VGA connector is the output of the analog signal on the graphics interface , VGA (VideoGraphicsArray) interfaces , also called D-Sub connector. Although the LCD monitor can receive digital signals directly , but many low-end products in order to match with the VGA interface card , which uses the VGA connector.