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Dell U2713H preset sRGB..
Hello to all the forum...
I just bought the U2713H monitor and I have a question ( It is my first ''expensice'' monitor bare in mind). When I select the sRGB preset of the screen, the whites become sort of blue. Is this normal? Does this happen to all the U2713H screens? and if yes why does it happen and how can I change it?
Thank you in advance for your time.
yumichan
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September 16th, 2015 06:00
sRGB and AdobeRGB are precalibrated factory presets. Dell factory calibration "claims" a MEAN error less than some value. MEAN by definition could have individual values above and below MEAN value. In your situation is white point the value that is off, other units may have other drifts...
Dell's factory calibration is done at nonsense values like 50% OSD brightness, lowering brightness to 20-30% close to usual values of 120-140cd/m2 could make white point to drift.
>My U2413 factory sRGB mode, has a cooler white than D65 (sRGB white).
AFAIK gamut and gamma of AdobeRGB and sRGB factory calibrated modes are OK on all models, but white point drift seems to be very common on thses dells.
Factory modes in these GB-LED models are FIXED, no service menu, so white point ONLY can be corrected with GPU calibration and loosing some grey levels. It is done smoothly with an AMD graphics card or a nvidia Quadro, otherwise you'll get awful banding.
>Since I have a AMD Radeon I can calibrate sRGB OSD preset to D65 without visual side effects (GPU dither makes invisible blue channel loss of avaliabble steps that are needed to "fix" a cooler white point) and without effort (ArgyllCMS).
But these GB-LED models allow hardware calibration, so if you want an accurate "sRGB" mode, just buy an i1DisplayPro and calibrate to sRGB CAL1 or CAL2 memory slots.
>My U2413 is calibrated in CAL2 to sRGB gamut, D65 white and 2.2 gamma (not sRGB gamma since this mode is for "entertaiment"). After calibration gamut is OK, shite is OK and gamma (taking acount of unavoidable limitations near black of a finite 800:1 contrast value) is OK