In , on 01/22/07 
   at 09:32 AM, "Derek W. Keoughan"  said:

>inkleput{at}isp.com wrote:
>> I fed the second vid output from my T42 to my stand alone 17" LCD.  The
>> T42 is a 15"  and had the most basic video card for that
year.  Both are
>> always set at the default/native resolution of 1024 x 768.  Everything
>> worked straight up.  No searching for bits and pieces or setting odd
>> settings.
>> 
>> But the quality of the 17" display was pretty bad.  It had the
>> appearance almost of printing done on poor or damp paper that let the
>> ink bleed out from the edges of the characters a little.  Just fuzzy,
>> diffused edges.  Very bad compared to what it does very crisply with my
>> desktop - it's normal operation.
>> 
>> If the T42 had had the second or third step up in card quality would
>> this diffused look have been eliminated, or is this a driver problem?

>External VGA should match your laptop screen, with perhaps slight 
>blurring if you're using extremely long VGA cables (as is often the case 
>with KVM switches, especially ones with cheap cables).

>Your external panel may also be a slower refresh design than the 
>built-in laptop screen, which would cause ghosting and blurriness, 
>especially on fast-moving images.

>Can't speak for the T42, as I have no experience with it, but perhaps 
>it's a full-digital display, while the external VGA port would be 
>digital (video memory) to analog (the signal down the cable) to digital 
>(within the external panel), so there's some loss of sharpness in the 
>double conversion.

>You're also comparing a 15" LCD and a 17" LCD at the same native 
>resolution - the pixel size on the 17" would be bigger, which would also 
>introduce some graininess.

>Hope this helps!

>-Derek

Perhaps you can recall that the LCD screens display less than stellar
results when used at their non-native resolution?   I have not heard that
this problem has been resolved yet.

Each LCD screen created, has a native resolution at which it displays its
best.  The specs that come with the screen should share that information
with you.  A normal CRT has a much wider range of resolutions that display
quite crisply.

Perhaps the native resolution on the 15"LCD is not the same as the native
resolution for the 17"LCD device?

If not, you may wish to change your screen setup to match the native
resolution of the 17"LCD screen and see if it does better.   You may also
find that the 15"LCD screen will be less crisp at this new resolution.


-Mark
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