How to classify VGA signal lines?

Hello, it is mainly used to transmit network signals or **, data signals, etc., which are extremely widely used. Because network cables are one of the most common twisted pair cables, the characteristics of Category 5, Category 5, and Category 6 network cables are just right for transmitting VGA signals with relatively high bandwidth. For VGA signal line, please refer to the technical information of Xunwei Encyclopedia.

There are a total of 15 core wires of the VGA cable, which correspond to the 15 pins of the VGA interface, and each data line has its different functions and can transmit different signals or data, so each line is useful. But regardless of the display effect, only the red, green and blue cores are needed.

The VGA cable transmits an analog signal, and as the transmission distance increases, the image quality decreases. However, the limit distance that each VGA transmission line can transmit is different, and the key lies in the quality and workmanship of the VGA cable itself; In general, the VGA cable can transmit about 15 meters to 20 meters.

A VGA cable is a data transmission cable that connects a computer graphics card to a monitor or TV and transmits information. The information processed by the graphics card is eventually output to the display, and the output interface of the graphics card is the bridge between the computer and the monitor, which is responsible for outputting the corresponding image signal to the display.

As the widest type, the VGA interface contributes a lot to the graphics card. The general graphics card supports this interface type, even if it does not have a VGA interface, as long as it is empty for display purposes, there will be a corresponding converter head to convert the signal.

The VGA connector is a D-type connector with a total of 15 pins on it, divided into three rows of five each. The VGA cable, also known as the D-Sub cable, is used to connect the graphics card to the display.

1. The appearance of VGA interface is 15 pins, and the appearance of DVI interface is a 24-pin connector;

2. The VGA interface transmits analog signals, and the DVI interface transmits digital signals;

3. The VGA interface has to go through a digital-to-analog conversion and an analog-to-digital conversion when transmitted to the display, and the signal is lost, and the residual display is relatively blurry, while the DVI does not need to be converted when connecting the computer graphics card and the display, and the signal is not lost;

4. VGA interface transmission is slow and less stable because it has to go through two signal conversions, while DVI transmission does not need signal conversion, the speed is faster and the transmission is more stable;

5. There is almost no difference between the VGA interface and the DVI interface at 800 600 resolution, but the general analog signal will have obvious errors under the liquid when the resolution exceeds 1280 1024, and the higher the resolution, the more serious.

The VGA connector is a D-type connector with a total of 15 empty pins on it, divided into three rows of five each.

VGA has a total of 15 wires, which is not so practical for our normal use, only 6 wires are enough.

1 foot: red.

2 feet: green.

3 feet: Blue.

13 pins: line synchronization.

14 feet: field synchronization.

Plus a grounding wire.

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VGA (Video Graphics Array) is a computer display standard proposed by IBM in 1987 that uses analog signals, VGA first refers to the display 640x480 display mode, VGA English full name is Video Graphic Array, also called display drawing array. VGA male plug (usually located on the monitor side).

The application of VGA technology is also mainly based on VGA graphics cards for computers, notebooks and other devices, while the application of VGA technology is rarely seen on some devices that require the display of color high-resolution images and do not need to use computers. In this paper, the implementation method of embedded VGA display is studied. The embedded VGA display system based on this design method can realize the display and control of VGA images without the use of VGA graphics cards and computers.

The system has the advantages of low cost, simple structure and flexible application, and can be widely used in advertising and prompt information display in supermarkets, stations, airports and other public places, and can also be applied to the operation information display in the production process of the factory workshop, and can also be applied to daily life in a multi-form.

The general connection between the computer unit and the monitor is a VGA cable (15-pin).