Hello Ken,
1) Does it seem possible for one monitor of this model to exhibit poor field-of-view characteristics while others of the same model are significantly better?
Yes, I have seen messages of users which had this kind of problem with this model, which seemed to be related to date (earlier revisions) and place of assembly (Mexican models better than European models at a time). I have had a Dell U2410 for a few years (assembled in Mexico) which does not exhibit this problem .
2) Is it uncommon for a monitor to pass the ISO conformance tests yet still appear so non-uniform?
Yes, ISO chromaticity test is pretty loose. It was done a time where LCD monitors were not common. Please note that chromaticity uniformity is not measured, just the shift relative to a target value.; this is not the same thing! Also, if I recall correctly, ISO 12646 has a tolerance of 0.010 (chromaticity radius) instead of 0.025 (and for D50). How do your measurements fit with this smaller radius?
3) Does anyone have any other suggestions as to what may be the cause of the non-uniformity?
Uneven pressure of the assembly bezel? Aging? Danny ----- Original Message ----- From: "Ken Fleisher" <PT_Ken@netbox.com> To: "ColorSync Users Mailing List" <colorsync-users@lists.apple.com> Sent: Wednesday, June 20, 2012 4:43 PM Subject: DELL U2410 and ISO conformance
Hello. We use the Dell U2410 monitor for some of our less critical color stations. One particular monitor shows a pretty strong color shift from side-to-side (green-to-magenta), especially when viewing a solid gray screen. To see if the monitor has a hardware problem, I used an i1Pro and BabelColor CT&A to test for ISO 3664 conformance. I was actually surprised when the monitor passed all of the tests, since I was expecting it to fail on either the uniformity or the chromaticity. Despite the numbers, the monitor is visually non-uniform.
I suspect that it is a field-of-view issue. My questions are:
1) Does it seem possible for one monitor of this model to exhibit poor field-of-view characteristics while others of the same model are significantly better? 2) Is it uncommon for a monitor to pass the ISO conformance tests yet still appear so non-uniform? 3) Does anyone have any other suggestions as to what may be the cause of the non-uniformity?
Thanks in advance for your help!
Ken Fleisher _______________________________________________