Iiyama PL2792UH – Nominal tolerance exceeded

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  • #27320

    Simon Graf
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    Hello,

    I’m trying to calibrate an Iiyama PL2792UH, which has White LED backlight and should have 100% sRGB coverage.
    – At first I used the “LCD White LED family (AC, LG, Samsung)” correction with my i1 Display Pro but the Average ΔE*00 was at 1.99 (see attachment)
    – The “LCD PFS Phosphor WLED family” correction had similar results.
    – Then I could borrow an i1 Pro spectro to make my own spectral correction but still the Average ΔE*00 is high at 1.93 (see attachment). Also the sRGB coverage was at only about 83%. When I tried “matrix” it was even worse (Average ΔE*00 3.33)

    Am I doing something wrong? Is it possible to get better results with this panel? I’d be very thankful for any suggestions.

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    #27323

    MW
    Participant
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    The gamut is limited in the green axis. A custom correction is unlikely to solve it. Look at the OSD settings and disable any named color mode like “office”, “gaming” OR “movie”. Also check GPU setting for any options that might be affecting colors.

    #27326

    Simon Graf
    Participant
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    Thank you for your suggestions!

    On the OSD front, everything should be fine. Before the measurement, I also tweaked the Brightness and RGB sliders a little until the text turned green during the measurement. The GPU settings in MacOS should also be good, Night Shift was turned off 😉

    I’m a little clueless…

    #27327

    MW
    Participant
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    There’s a discrepancy in contrast ratio in each report. Did you keep settings constant besides correction? I’ll assume 300:1 was a measurement error but 600:1 isn’t great for a LED based display without uniformity correction.
    The gamut coverage in each report appears more like an unprofiled display. You unchecked “use simulation profile as display profile”?

    If yes that’s a pretty bad for Iiyama. A XYZLUT profile might improve things a little but greens will remain limited. You should return it.

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