The VGA interface and DVI interface are better

DVI is better than VGA and technically more advanced than VGA.

Nowadays, LCD displays with DVI interfaces are very popular, and graphics cards with the same interface are also common, so this combination has led to the popularity of DVI, and the traditional VGA interface is gradually declining because it cannot fully match the digital signal.

Compared to conventional VGA signals, LCD displays using DVI signals do not have phase problems and do not cause pixel jitter. In addition, after using the DVI signal, the display will not cause geometric distortion, which greatly improves the quality of the picture.

Unlike VGA interfaces, there are many standards for DVI interfaces, so you must be aware of them when using monitors.

There are 5 types of DVI. Among them, DVI-D and DVI-I are divided into two types: "dual-channel" and "single-channel", what we usually see is a single-channel version, and the cost of the dual-channel version is very high, so only some professional equipment has it, and it is difficult for ordinary consumers to see.

DVI-A is an analog transmission standard that can be seen in late large-screen professional CRTs. However, because it is not fundamentally different from VGA, and the performance is not high, DVI-A has actually been abandoned. As for the DFP interface, this is an early digital specification that has been deprecated.

Since we are talking about the DVI line, we can't fail to talk about VGA. Because there are still some single VGA LCD monitors in the market, which are usually about 100 yuan cheaper than models with DVI, are these monitors worth buying?

If it's a small-screen product, there's no harm in buying it. Because the difference between DVI and VGA is only obvious at 1600*1200 such as high resolution, lower resolutions such as 1280*1024 or 1440*900 are basically invisible, as for the phase and geometric distortion of the display, with the development of display automatic adjustment technology, one key auto can be done.

If you decide to buy a dual-interface monitor, be sure to use the DVI signal in it, as the display quality will be severely degraded if you use the VGA signal. The reason for this is that the graphics card cut a lot of corners, and the VGA part of the low-pass filter circuit was canceled, resulting in serious signal loss.

Good DVI interface (no distortion).

The DVI digital interface can be used to transmit the computer signal directly to the display, with almost no signal loss in between. It is directly the transmission of digital signals, and there is no interconversion link between analog and digital signals. The advantage of DVI is mainly reflected in the fast signal transmission speed.

The picture display is highly clear.

VGA is mainly used for old-fashioned computer output. The VGA outputs and transmits analog signals. Everyone knows that the reunion hole of the computer graphics card generates a digital signal, and the display also uses a digital signal.

DVI interface specifications

When transmitting digital signals, the DVI interface is divided into single link and dual link. The transmission rate of a single-connected DVI interface is only half that of a dual-connection, which is 165MHz s, and the maximum resolution and refresh rate can only support up to 1920x1200, 60Hz.

As for the dual-connected DVI interface, it supports up to 2560x1600, 60Hz mode, and can also support 1920x1080, 120Hz mode. In order to achieve 3D effect, the LCD must have a refresh rate of 120Hz, so in the 3D solution, if you use DVI, you must use the DVI cable of the dual-connected DVI interface. In general, if it is a resolution within 1920x1200, the image quality output of single and double connections is the same.

The difference between VGA interface and DVI interface: different shape and color, different shape and contour, different uses, different functional strengths, and different color expressions.

1. The appearance color is different, generally VGA is blue, DVI is white.

2. The outline is different, the number of needles in DVI is more than that of VGA, the most intuitive, in addition to the stitches, there is a small piece of iron next to DVI.

3. Different uses, VGA belongs to analog signals, almost the older generation of display devices that can be seen support leakage, DVI belongs to digital signals, and now good LCD displays or projections are supported, and have been popularized.

4. The strength of the function is different, the DVI interface is better, because the display signal of the computer is also digital, so if the LCD display also supports DVI, it will achieve a lossless display effect, of course, this is just ideal, there will be more or less loss, but the loss is much less than VGA.

5. The color performance is different, the color of VGA will be more vivid, and the brightness and contrast of DVI will be higher, in general, they have their own strengths.

Encyclopedia-VGA interface.

Encyclopedia-DVI interface.

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.