DVI Study Notes

DVI Study Notes

I. DVI interfaces have five standards:

Serial number	DVI Standard	For display (accept display signal)
1	DVI-I dual channel	Acceptable digital/analog signals
2	Single Channel DVI-I	Acceptable digital/analog signals
3	DVI-D dual channel	Only digital signals can be accepted
4	Single Channel DVI-D	Only digital signals can be accepted
5	DVI-A	Only analog signals can be accepted

 

 

Serial number	DVI Standard	For the display card (issuing the display signal)	Note:
1	DVI-I dual channel	Converts a digital signal to a VGA analog signal.	You can also disable digital signal conversion.
2	Single Channel DVI-I	Converts a digital signal to a VGA analog signal.	You can also disable digital signal conversion.
3	DVI-D dual channel	You cannot convert a digital signal to a VGA analog signal.	Only digital signals can be sent
4	Single Channel DVI-D	You cannot convert a digital signal to a VGA analog signal.	Only digital signals can be sent
5	DVI-A	Abandoned

 

In common DVI interfaces, the DVI-D interface can only receive digital signals, the interface only 3 rows 8 columns A total of 24 pins, one of the top right of the pin is empty. Incompatible analog signal.

So the DVI-D is more applied to the monitor.

The DVI-I interface is compatible with both analog and digital signals. Good simulation compatibility does not mean that the analog signal interface D-sub interface can be connected to the DVI-I interface, but must be used through a conversion connector, generally, graphics cards using this interface have related conversion connectors.

Ii. How to differentiate the five interfaces of DVI

Iii. Display DVI interface

The display is of the p2250w model of Samsung, 22 inch

DVI interface is DVI-D dual channel.

Iv. graphics card DVI interface

Video Card: Rainbow yicai 9600gt-gd3 CF gold edition 512 m

Is 24-pin DVI-I Interface

V. dvi

Shanze (samzhe) SM-7718 high-density two-color network DVI high-definition line 1.8 meters.

The interface of the DVI line is 3 rows, 8 in each row, total 24 pins, and 1 large pin, referred to as 24 + 1

The DVI line is a single channel.

 

The single-channel DVI-D interface supports up to 1920*1200*60Hz signals.

Note: There are also single and dual channels in the DVI line.

The dual-channel signal bandwidth is twice the bandwidth of the single channel, which can make the display of high-resolution display smoother

The higher the number of DVI channels, the higher the resolution and color depth.

Vi. Analysis

Serial number	Physical equipment	Pin	DVI interface type	Description
1	Display	24 + 1	Dual-channel DVI-D	Only digital signals can be accepted
2	Graphics card	24 + 5	Dual-channel DVI-I	Can send digital signals
3	DVI data cable	24 + 1	Single Channel DVI-D	Both ends can be inserted.

 

The output signal of the video card is a digital signal, but the digital signal can be converted to a analog signal for display.

The number of DVI data cables is smaller than or equal to the number of DVI pins of the display and video cards.

 

7. Problems

After the DVI data line is connected, the screen displays the "detection signal line" without an image.

VIII. Solution

Connect your computer's graphics card and display card with a vgaine. You can see that the image is displayed normally on the screen. When the vgaline is properly displayed, unplug the vgaline and connect it to the DVI data line. It will be displayed normally.

 

It is estimated that the reason is Samsung p2250 display itself (end ).