makvision svga monitor blurry @ the edges of the screen ? see photo's

[ceekay011]

Hi ,

In the middle from top to bottom the screen is sharp but @ the right and left its blurry 



is the monitor bad ?


 

[lilshawn]

it's not uncommon for monitors to be a little off on the corners and edges.

see this post here:  http://forum.arcadecontrols.com/index.php?topic=111482.0 it's basically the same issue.

[ceekay011]

thanks for the reply.

a little is acceptable but its more , its a new monitor .

could it be magnetisme that puls them wrong ? 

[MonMotha]

It looks pretty much fine to me, or at least what I'd expect from a TV type tube.  These things don't have nearly the dot pitch that computer monitor type tubes have, so they'll look a little fuzzy at high resolutions as compared to a computer monitor.  The upside is that they look beautiful at lower resolutions while computer monitor type tubes look grainy and have overly emphasized scanlines.

The effect lilshawn is referring to is unrelated to age.  It's simply how the CRT itself is constructed.  The dynaflat/pureflat tubes (the ones with perfectly flat faces, which I think the new Makvisions are using) are generally a little worse in this regard, as well.

Honestly, other than the EXTREME right edge (the "fox" in the text, maybe) it looks "sharper" in many ways than the top picture, which I assume is an LCD.

You can try tweaking the "focus" control just a hair.  Doubtful this will do anything other than make it worse (so be prepared to change it back), but it's possible they didn't bother to get it quite right at the factory.

[ceekay011]

It looks pretty much fine to me, or at least what I'd expect from a TV type tube.  These things don't have nearly the dot pitch that computer monitor type tubes have, so they'll look a little fuzzy at high resolutions as compared to a computer monitor.  The upside is that they look beautiful at lower resolutions while computer monitor type tubes look grainy and have overly emphasized scanlines.

The effect lilshawn is referring to is unrelated to age.  It's simply how the CRT itself is constructed.  The dynaflat/pureflat tubes (the ones with perfectly flat faces, which I think the new Makvisions are using) are generally a little worse in this regard, as well.

Honestly, other than the EXTREME right edge (the "fox" in the text, maybe) it looks "sharper" in many ways than the top picture, which I assume is an LCD.

You can try tweaking the "focus" control just a hair.  Doubtful this will do anything other than make it worse (so be prepared to change it back), but it's possible they didn't bother to get it quite right at the factory.

top picture is from the same crt monitor

ps the rez is 640x480

[MonMotha]

Then that's definitely just the way the tube is built.  It's probably not a particularly high end tube, but I wouldn't expect perfectly uniform dot density out of any TV type tube.  It does seem a little worse than I'm used to, but it's probably accentuated by what appears to be a fairly tight dot pitch, though still much lower than that of a high-end computer monitor tube.  Most of my arcade monitors (even the higher res capable ones like my Korteks) have a much lower dot pitch which, while smearing very fine details, hides imperfections quite nicely.  This is actually something that an older "non-flat" tube would do better with, but then it wouldn't be totally flat, which everybody seems to want these days.

There's a moire pattern showing up on your "edge" picture that's not on the "center" picture, and I can't tell if it's just from the camera or if it's indicative of something actually going on.  Do you have a copy of that picture that isn't scaled down?

640x480 progressive is fairly high res for a tube of this type, though when you said SVGA, I thought you meant 800x600 (which is "SVGA", 640x480 is "VGA", according to VESA). These things were never really designed to display 1 pixel wide lines at 640x480, anyway.  Again, they're not computer monitors.  Most games should look gorgeous on them as they use larger graphics.

I certainly don't see anything that indicates damage to the monitor.  Whether you like it or not is of course a personal choice.  If you find it extremely objectionable, you might want to inquire about returning it.

[ceekay011]

Then that's definitely just the way the tube is built.  It's probably not a particularly high end tube, but I wouldn't expect perfectly uniform dot density out of any TV type tube.  It does seem a little worse than I'm used to, but it's probably accentuated by what appears to be a fairly tight dot pitch, though still much lower than that of a high-end computer monitor tube.  Most of my arcade monitors (even the higher res capable ones like my Korteks) have a much lower dot pitch which, while smearing very fine details, hides imperfections quite nicely.  This is actually something that an older "non-flat" tube would do better with, but then it wouldn't be totally flat, which everybody seems to want these days.

There's a moire pattern showing up on your "edge" picture that's not on the "center" picture, and I can't tell if it's just from the camera or if it's indicative of something actually going on.  Do you have a copy of that picture that isn't scaled down?

640x480 progressive is fairly high res for a tube of this type, though when you said SVGA, I thought you meant 800x600 (which is "SVGA", 640x480 is "VGA", according to VESA). These things were never really designed to display 1 pixel wide lines at 640x480, anyway.  Again, they're not computer monitors.  Most games should look gorgeous on them as they use larger graphics.

I certainly don't see anything that indicates damage to the monitor.  Whether you like it or not is of course a personal choice.  If you find it extremely objectionable, you might want to inquire about returning it.

got the same pic @ 800x600
this is the monitor : http://www.happcontrols.com/monitors/49271700.htm
her are som extra pictures : http://www30.zippyshare.com/v/25459466/file.html

[MonMotha]

Yup, that's actually the exact effect that lilshawn linked to.  You can see that the dot pitch of the tube gets coarser near the edge.  It's especially prevalent on mid- and low-end dynaflat CRTs and any tube that has a high deflection angle, but all tubes exhibit this to some degree.  The effect will be more pronounced at 800x600 than 640x480 as the detail of the source image is finer.