What does VGA (d-sub) mean

VGA (video Graphics Array) is an IBM in the 1987 with the PS/2 Machine launched a standard, with high resolution, fast display rate, rich color and other advantages, in the field of color display has been widely used.

VGA standard

The VGA (video Graphics array), the visual Graphics array, was IBM's 1987 PS/2 Machine (PS/2 "Personal System 2"), "Personal System 2", a personal computer launched by IBM in 1987. The keyboard and mouse interface used on the PS/2 computer is now the PS/2 interface. Because the standard is not open, PS/2 computer failed in the market. Only the PS/2 interface has been in use until today. ) together with the use of analog signal of a video transmission standards, at that time with high resolution, fast display rate, rich color and other advantages, in the field of color display has been widely used. This standard is already very outdated for today's PC market. Even so, VGA is still the standard that most manufacturers support, and the PC must support the VGA standard before it can load its own unique driver. For example, the boot screen of the Microsoft Windows family still uses VGA display mode, which also explains its importance and compatibility in the display standard.

VGA display and VGA timing implementation:

The Universal VGA display card system consists of three parts: control circuit, display buffer and video BIOS (basic Input output System) program.

D-sub Interface:

Commonly known as VGA (video Graphics Adapter) interface. D-sub is the abbreviation of d-subminiature, it is a standard of interface shape and structure, it is a kind of analog signal interface, it has different interface number according to requirement. D-sub contains subclasses, such as DB25, the first letter D is D-sub, and the second letter B describes the size of the interface--corresponding to the number (PIN number) (a=15 needle, b=25 needle, c=37 needle, d=50 needle, e=9 needle). Each interface is divided into male (plug) and female headers (sockets).

VGA display mode

The first VGA is the display mode of the display 640x480.

VGA male plug (usually located on the display side) the application of VGA technology is mainly based on VGA display card computer, notebook and other equipment, and in some of the requirements to display color high-resolution images and no need to use the computer equipment, the application of VGA technology is rarely seen. In this paper, the implementation method of embedded VGA display is studied.

The embedded VGA display system based on this design method can display and control VGA image without using VGA display card and computer. The system has the advantages of low cost, simple structure and flexible application, can be widely used in supermarkets, stations, airports and other public places advertising and hint information display, can also be applied to the factory workshop production process information display, can also be used in the multi-media form of daily life.