How the monitor distinguishes between different DVI standards

DVI is divided into several specifications, which dvi-a in fact is the VGA interface standard, but only the same, the current DVI interface is mainly dvi-d and dvi-i two kinds, and these two specifications, and then divided into two channels and single channel, people usually see is a single channel version, Dual-channel version of the cost is very high, so only some professional equipment to have.

In the common DVI interface, the Dvi-d interface can only receive digital signals, with only 3 rows and 8 columns on the interface with 24 pins, one of which is empty in the upper-right corner. Incompatible analog signal.

The Dvi-i interface can be compatible with both analog and digital signals. The compatibility simulation Fortunately does not mean that analog signal interface D-sub interface can be connected to the Dvi-i interface, but must be through a conversion connector to use, the general use of this interface graphics card will have the relevant conversion connectors.

　　Difference between 18-pin and 24-pin DVI

In the purchase of liquid crystal display, people may find that DVI has 18 stitches and 24-pin Two, some people say 18-pin DVI is a simplified version, than 24-pin performance is much worse, and some people say 24-pin DVI is more than a number of ground there is no difference. What exactly is the truth?

Said earlier, in the different specifications of DVI, but also divided into two channels and single channel, in fact, the 18-pin, 24-pin is the difference between the two types. 18-pin DVI belongs to single channel, and 24 pins belong to dual channel, that is, 18-pin DVI transmission rate is only half of 24 needles, 165MHz. In the screen display, single channel DVI support resolution and dual channel is exactly the same, but the refresh rate is only about half of the two channels, will result in a decline in the quality of the display. Generally speaking, single channel DVI interface, the maximum refresh rate can only support to 1920*1080*60hz or 1600*1200*60hz, that is, the existing 23-inch widescreen display and 20-inch normal proportional display display, and then high words will result in a drop in the display effect.

is the 18-pin DVI LCD monitor not able to buy? The answer is, of course, the negative, the current use of the display size of most of the 20 inches below, accurately said is not a large LCD display, the standard resolution of these monitors are within the 18-pin DVI capability range, Unless you are buying a large LCD display of more than 23 inches, there is absolutely no need to worry about 18 or 24 stitches.