Background: I calibrate my monitor with an Eye One Display 2 device and use the validation feature before and after calibration. This gives detail and average dE2000 values, which, in simple terms, tells you a numerical value for the out-of-gamut errors of the monitor with respect to the 43 colour patches used for calibration.
At the end of March this year I replaced my failing cheap Chinese LCD monitor with an Eizo 22” wide screen, wide gamut one and, as is my custom, calibrate it every month.

I was very surprised to see how much the average dE2000 value drifted over a month, not what I expected for a “quality” monitor. The values just before re-calibration were not bad; it was the change that concerned me. However, last month I noticed a reduced drift and now this month, the drift is quite small.
I have attached a screen snap of the record graph.
My electronic engineer friends tell me that components get worse with age so the circuitry “settling down” is probably not the reason for the calibration drift improvement. Does anyone know what it might be, the LCD panel perhaps?
Terry.

I had wondered about the graphics card but since all seems to be good now, it's probably something else. My Vista laptop drifts quite a lot during a month, based on the validation numbers. That may well be the on-board graphics processor.

I've never been able to see any differences in colour, only brightness on the laptop where the adjustment is very course.
Terry

Terry,

I use an eye one 2 on my (about 3 year old) NEC LCD monitor and see almost no drift even over 6 months. Usually stays under 1.0. So what you are seeing certainly looks excessive.

I would have thought that there could be some component value changes in the early period of "burning in" a new device, but I would have expected things to have stabilized by now. Especially, as you say, for an Eizo.

Mike S

Sorry I fell foul once again of typing a TAB, which causes the message to be sent prematurely :-(


Mike S

Don't forget (or be aware) that Microsoft has gotten into the Color Mangement business with Vista and come up with a whole new scheme.  It is, however, generally seen as a better system.

The problem with Vista (and now Windows 7) is even though you use your monitor profile as default, these OS have a tendency to dump it and revert when "not responding" and some other screen refreshes occur.  There are some hacks out there that I have used and been able to stabilize.

XP doesn't have that issue.