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What is VGA?

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VGA (Video Graphics Array), IBM 1987 with the PS / 2 machines with Release A video transmission standard , having a high resolution, fast display rate, rich color, etc., are widely used in the field of color display. Plug and play, does not support the audio transmission.



Full name

Video Graphics Array


Out of time

year 1987


The main advantage

Resolution high, fast display rate, rich colors


 

 

Standard


VGA ( Video Graphics Array ) that is Video Graphics Array , is an IBM 1987 with the PS / 2 ( PS / 2 was originally "Personal System 2" meaning, "Personal System 2" is IBM in 1987 introduced a PC .PS / 2 used on the computer keyboard and mouse interface is now the PS / 2 interface . because the standard is not open, PS / 2 computer failed in the market. only PS / 2 interface is still used today) with the launch of use an analog signal to a video of the transmission standard , having a high resolution, fast display rate, rich color, etc., are widely used in the field of color display at that time. The standard for today's PC market has been very out of date. Even so, VGA is still the largest manufacture of a standard business jointly supported by the PC in its own unique load drivers before the program, must support the VGA standard. For example, Microsoft Windows family of products still use the boot screen VGA display mode, which explains its importance and compatibility display standard.



Display Mode


It refers to a first VGA display 640X480 this display mode.

Application VGA technology is still mainly based on computer VGA display cards, laptops and other devices, and in some require both high-resolution color image display and no need to use the device on the computer, use VGA technology but rarely seen.

For some embedded VGA display system, can be used without the display card and VGA computer implemented display and control the VGA image. The system has a low cost, simple structure, flexible application can be widely used in public places, supermarkets, railway stations, airports and other advertising and message display can also be applied to operate the plant floor process information display, but also used in daily life in a multimedia format.

VGA Interface

VGA Interface : VGA (Video Graphics Array) and a name is D-Sub.

VGA, Video Graphics Array, / D-Sub interfaces; VGA interface is a D-type interface, non-symmetrical distribution of 15pin connection, a total of 15 pins, divided into 3 rows of 5 wells.

A total of 15-pin VGA connector, divided into three rows, each row of five holes, the card is the most widely used interface type, the vast majority of graphics cards with such an interface. It transmits red, green, blue analog signal and a synchronization signal (horizontal and vertical signal).

Usually in the VGA connector, and the like will be marked each 1,5,6,10,11,15 interface number. If not, as shown in FIG numbers.

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VGA interface 15 needles, which corresponds to the interface is defined as follows:

1. Red color Red ( demolition of a VGA monitor cable, the HP, the pink line )

2. The green primary color green ( demolition of a VGA monitor cable green trace )

3. blue primary color Blue ( demolition of a VGA monitor data line light blue line )

4. The address code ID Bit (also part of the RES, or a display ID2 Flag bit 2)

The self-test (various different definitions) (typically the GND) ( demolition of a VGA monitor cable black line )

6. the red ( demolition of a VGA monitor cable, 4,6,7,8,11 shielded cable are connected together )

7. Greenland

Blue to 8.

9. Reserved (various different definitions) (KEY ·· I was not very appreciated) ( demolition of a VGA monitor data line , yellow line )

10. The digitally ( demolition of a VGA monitor cable, red line)

11. The address code (the ID0 Display Flag Bit 0)

12. The address code (ID1 Display Flag bit 1) ( demolition of a VGA monitor data line, green line)

13. A line synchronization (demolition of a VGA monitor data line, a white line)

14. The field synchronization (demolition of a VGA monitor cable, brown line)

15. The address code (ID3 or display designated bit 3)(Demolition of a VGA monitor cable, the orange line)


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