Re: visual distortion on CRT displays
Re: visual distortion on CRT displays
- Subject: Re: visual distortion on CRT displays
- From: David Scharf <email@hidden>
- Date: Fri, 24 Jun 2005 15:52:20 -0700
Hi Lauren,
This sounds like horizontal scan non-linearity to me, caused by the CRT
electronics. External magnetic fields typically affect the color
purity, causing weird color areas on the CRT. But scan linearity is
controlled by the electronics. Are there any external "geometry"
controls on this monitor? If not, the controls are likely internal and
could be tweaked by a technician. That's very rude of LaCie not to take
it back or fix it. No warranty?
Good luck,
David
DAVID SCHARF PHOTOGRAPHY
Scanning Electron Microscopy
Los Angeles, CA 90039
http://www.scharfphoto.com
http://www.electronmicro.com
Steve Upton wrote:
At 11:34 AM -0400 6/24/05, Lauren Helf wrote:
At 12:15 PM -0400 6/23/05, Lauren Helf wrote:
I would appreciate hearing about the commonality and acceptability of screen distortion on a high-end CRT display. I have now had 3 new monitors of the same brand (LaCie electron22blueIV) that distort an image in similar ways. A perfectly round circle will balloon outward when moved off the center of the screen (turns into an ellipse). It gets progressively worse the further it is from screen center. I have measured the difference in diameters and quantified this as a 5.8% distortion at the extreme. Also, a skewing of square or rectangular shapes is apparent in one corner of the screen. These problems are still existent when I test the monitor in another room, hook it up to another computer, and try another cable. Unhappily, this third monitor has the additional problem of uneven color across the screen. (The right side is preponderantly blue rather than neutral.) These are all critical problems for my work as a photographer and graphic artist and desig
ner. The manufacturer has already refused to simply take back the monitor and refund me my money. It is too late to return it to the store I originally purchased it from. I know that a good number of you out there on this list have been using this monitor (LaCie electron22blueIV). Can anyone suggest a mode of recourse? Thank you.
I know this might sound like a strange question but where, in the world, are you?
I think that you are looking at a very good reason to upgrade to an LCD display. They are not affected by magnetic fields in any way (that I've heard)
Regards,
Steve
I am using the monitor with a PowerMac G4 in New York City's East Village, in a low-rise residential building. This neighborhood is low-lying because the bedrock is much further down than in other areas of Manhattan. There are no tall office buildings or high-tension power lines in the immediate area. There is an electric power sub-station a block and a half away. I can't imagine that the monitor distortion is due to my location; Manhattan has lots of imaging professionals working here. Could the problem be a streak of bad luck with the LaCie's?
it's always possible... seeing it in 3 different displays might rule out a bad single display but unfortunately doesn't point yet to either LaCie or field problems...
have you tried any other displays (of the same size)?
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o email@hidden 206.985.6837
o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
________________________________________________________________________
|
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden