Contrast ratio higher that the default stated in the specs

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  • #25232

    thedandyman
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    Long story short, I finally calibrated and profiled my wide-gamut monitor using i1 display pro plus. The results generally looked OK but I’m kind of bothered that the reported contrast ratio was 1127:1, while the specs of the monitor states that the static contrast ratio is only 1000:1. I’ve seen several times about monitors having a lower contrast ratio than advertised but is it really possible to have one that is higher? I would assume that these companies would advertise the highest possible contrast ratio for their monitors so it would be impossible to get something higher than that.

    A couple of things to note as well, which might be related.

    1. The monitor was already running for more than an hour by the time I started the calibration. Whenever I would measure the black level though, the value keeps getting lower. It started with around 0.28. After around 10 minutes or so, I measured it again and it showed around 0.2. I repeated it a few more times until I got to 0.1088. After calibration, the measurement report was showing a black level of 0.1076. Is this a normal behaviour? If not, is it a fault in the monitor, the i1 display pro plus, or something else?
    2. I set the whitepoint to 6500K but the measurement report after was showing a whitepoint of 6300K only (as seen below).  Why didn’t the calibration/ profiling set the whitepoint to 6500K? For what it’s worth, the measured whitepoint prior to calibration was even higher (6400K).

    Display profile whitepoint:
    xy 0.3146 0.3328 (XYZ 94.53 100 105.91), CCT 6373K

    Measured whitepoint:
    xy 0.3153 0.3338 (XYZ 94.47 100 105.1), CCT 6331K

    Assumed target whitepoint:
    6300K daylight, xy 0.3161 0.3325 (XYZ 95.08 100 105.68)

    TIA!

    i1Display Pro Plus on Amazon   i1Display Pro on Amazon  
    Disclosure: As an Amazon Associate I earn from qualifying purchases.

    #25256

    asdfage wegagag
    Participant
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    Think about how small a difference between 1127 and 1000 is. The number just looks big because of division.

    @ 100 nits, 1000:1 means, 0.1 nit black level
    1127:1 means, 0.088 nit bl

    Manufacturers tune their own color ramp at the factory, and it will vary between units.
    ~1000:1 is the standard for IPS these days. 3000-7000:1 is reached by VA, and there’s OLED with nearly infinity:1.

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