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November 27th, 2019 08:00
U2518D, backlight bleed and uniformity, #2
I also have non-uniform color temperature issues with my U2518D. I've measured the color temperature with DisplayCAL and a Spyder5. The monitor is set at 75% brightness and 75% contrast and manual RGB values to match the center of the display to a 6500K reference. Left of the center, at about a third of the width of the screen, I measure a DeltaE*00 of 4.7. Here's the proof:
I personally think this is unacceptable. You can clearly see a yellow tint on the left side of the screen with the naked eye. The color temperature on that part of the screen (and it's not even only near the edges) deviates around 500K from the center. Manufactured date is July 19. Does Dell consider this to be within specifications?
DELL-Jesse L
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November 27th, 2019 10:00
HuubRutjes,
Based on those pictures, this U2518D passes our manufacturer specifications for overall color uniformity and we would not issue an exchange. If purchased directly from Dell, you have 30 days from the invoice date to request a refund.
DELL-Cares
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November 27th, 2019 12:00
Hi!
We did not receive any response from your end. Do get back to us to assist you accordingly.
HuubRutjes
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November 27th, 2019 12:00
Thanks for your reply.
According to the Dell product page:
Color consistency comes standard: Your UltraSharp monitor is factory calibrated at 99% sRGB coverage to an accuracy of Delta-E less than 2, for precise hues right out of the box. Each monitor features a factory calibration report that guarantees color correctness, so you can trust your projects reflect true color intensity.
I am measuring a Delta-E of 4.7, so how could that pass specifications? If these are the real specs, then Dell shouldn't claim a Delta-E of less than 2 in the product. Sure, at a particular spot on the monitor the Delta-E is indeed on average less than 2 for a set of patches (as the factory calibration report shows), but if the color uniformity of the screen as a whole is so bad, than what is the use of a 'factory calibrated' monitor? No professional could seriously work on color-grading anything on this monitor, because it makes a huge difference on what part of the monitor you view your photos.
I am indeed sending the monitor back for a refund, and would advice Dell to either do better quality control of their products, or change the product specifications to "Delta-E less than 5", because now I feel like I'm am being mislead.