Technology refers to tools & machines that are used to solve the real world problems. DVI is one such technology, which was developed to obtain the crystal clear display on visual devices & improves the quality of imaging. DVI is a digital technology stands for Digital Video Interface. Produces high quality for TV & Projectors. It was developed by Digital Display Working Group (DDWG).

DVI NEED:

Previously Video Graphic Array (VGA) was in use for CRT (cathode ray tube) monitors i.e. a technology inside an analog computer monitor or television set. They work by transmitting horizontal line of the image and then change the output voltage & bring it to a desired brightness level. CRT responds to this voltage level by varying the intensity of electron beam & ultimately scans the display monitor.

DVI WORKING:

DVI has shortened the work of CRT. What it does? Unlike analog technology it works by adjusting the output voltage to a desired level, and then converts it into binary code & ultimately sets the brightness.

Using this source, all the pixels in the source will match correctly with those in the display & distortion free screen is obtained.

DVI VERSIONS:

Three versions of DVI are DVI A, DVI D & DVI I. DVI A & D transmits signal in analog & digital format respectively. DVI I work in an integrated mode and it can transmit the signals both in digital as well as in analog form.

DVI TECHNOLOGY:

It uses the technology Panel Serial which makes use of Transition Minimized Differential Signaling(TMDS). DVI links consists of 4 twisted pair of wires(each for a color code of red, blue & green, the last one is for the clock signal). Every single pixel wire in DVI transmit 24 bits. The picture images are sent line by line not in the form of packet

DVI LINKS:

Maximum possible resolution for 60 Hz is 2.6 mega pixel for a single link of DVI. The role of DVI connectors is to provide a second link in case of more than 2.6 mega pixel of resolution. Dual link is also used when more then 24 pixel bits are needed.

DVI SPECIFICATIONS:

The minimum clock frequency for DVI is 25.17 MHz & the maximum is 165 MHz. The pixels per clock cycle for single mode is 1, & for dual link 2. Bits per pixel is set at 24, but while it is in dual mode, it is set at 48 bits per pixel.

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