Help - Search - Members - Calendar
Full Version: VGA to DVI
Lumenlab > LLAVS: Lumenlab AVS > Projector Builder > Projector Technical Support
eyeguy
Does anyone know whether a PC without DVI output can be connected to an LCD with DVI input?

Is VGA analog connection with LCD much worse?

Both PC and LCD both have connections using VGA 15-pin.

If I find an adapter, would passing analog output to DVI be of any advantage?

Any opinions or knowledge appreciated.

eyeguy
elken2004
No DVI is different,,, most lcd's are DVI-D which means digital signal only

DVI-I has VGA as well on connector, there is no conversion VGA to DVI

and yes DVI is much more superior in image quality

but if you have only VGA just use it..
Rumplestiltskin
QUOTE (elken2004 @ Dec 31 2005, 11:20 PM) *
No DVI is different,,, most lcd's are DVI-D which means digital signal only

DVI-I has VGA as well on connector, there is no conversion VGA to DVI

and yes DVI is much more superior in image quality

but if you have only VGA just use it..



Elkin, Can you give some input of the diffrence between VGA and DVI ?
WHAT is diffrent ? Any background ? Im a N00B and it helps to
know some background as to how they differ and why they differ.
Thanks from up over... smile.gif

......Stiltskin
pagercam
QUOTE (Rumplestiltskin @ Jan 2 2006, 05:44 PM) *
Elkin, Can you give some input of the diffrence between VGA and DVI ?
WHAT is diffrent ? Any background ? Im a N00B and it helps to
know some background as to how they differ and why they differ.
Thanks from up over... smile.gif

......Stiltskin

VGA is an anlog signal for each red, green and blue plus horizontal and vertical syncs. The signals need to be clean and any noise corrupts your image needs to support signals over 100MHz. DVI is the same signals in a digital format i.e. 1 and 0's that is transmitted differentially which limits noise, noise can effect the signal but it is signifiantly more noise immune. As with most things digital the picture is perfect with increasing noise but at some point it stops working so it either a perfect image or nothing, analog signals continue to produce a picture the noise just degrades the signal further and further. The digital bits and transmitted over three wires that run at 1000MHz (ten times higher) so quality of cable and length are more important. In theory you will get a perfect image everytime with DVI and the signal is limited to 15 meters (45 feet). VGA depending on the noise evironment has a realistic range of 50 feet but expect some limitations in image quality as opposed to the perfect image of DVI. Most people are happy with VGA but the exacting nature of DVI should provide the best picture.
pagercam
For DVI you need both a monitor and graphics card that support DVI. Recent graphics cards should all suppiort DVI now. Probably 1/3 or so of monitors support DVI and its generally more expensive,
eyeguy
QUOTE (pagercam @ Jan 3 2006, 01:35 AM) *
For DVI you need both a monitor and graphics card that support DVI. Recent graphics cards should all suppiort DVI now. Probably 1/3 or so of monitors support DVI and its generally more expensive,



But am I correct that you still need a DVI output on your laptop in order to use the DVI input

on the LCD? The only other thing I have read about is getting a card with a DVI port built in.

Thanks,

eyeguy
Litherish
Yes, that is correct, you would need a video card supporting DVI output. Most Radeon's have DVI outputs on them if I remember correctly.

Oh yeah, you don't actually NEED a video card with DVI out, you could get this http://ecoustics.shopping.com/xPO-StarTech...erter~CLT-HSNLF
some other user posted this, It will work without using your PC to play things through DVI.
eyeguy
QUOTE (Litherish @ Jan 3 2006, 12:37 PM) *
Yes, that is correct, you would need a video card supporting DVI output. Most Radeon's have DVI outputs on them if I remember correctly.

Oh yeah, you don't actually NEED a video card with DVI out, you could get this http://ecoustics.shopping.com/xPO-StarTech...erter~CLT-HSNLF
some other user posted this, It will work without using your PC to play things through DVI.


Thanks. I think that is a bit pricey, but I'll keep it in mind. I'll probably just use the VGA on my laptop.

It seems like that is what most people on this site use for their projectors.
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2010 Invision Power Services, Inc.