REVIEW: Fujitsu P27T-6 IPS Part 14

The full potential of the Fujitsu P27T-6 is revealed only after calibration and profiling. Due to the very good coverage of sRGB and Adobe RGB colour spaces, the DeltaE deviations are reduced to a minimum. Almost being free of colour faults anyway, the grey axis enhances in the lower level of luminance. Now, white point and gradation are very close to the defaults. A contrast ratio of 900:1 is unusually high and once more draws attention to the to the monitor’s very good black point. The unsufficient coverage of the ECI-RGB 2.0 colour space results in higher deviations of primary and secondary colours. However, white point, grey axis, as well as gradation meet the defaults. Thus, there’s no obstacle using the Fujitsu P27T-6 for digital image processing, particularly when sRGB and AdobeRGB colour spaces ought to be served.

UGRA test

Finally, we calibrated the Fujitsu P27T-6 to the UGRA recommended settings (5800K, Gamma 1.8 and Luminance 147 cd/m² if possible with standard tools), in order to test its suitability for digital pre-printing processes/soft proofing. However, the certification can of course be achieved using other parameters. If the monitor doesn’t have a gamma control, the calibration normally reduces the the range of hues too much to pass the test with the parameters prescribed. To eliminate weaknesses of the EyeOne Pro, we limited the black value to 0.3 cd/m² manually.

Because our test model doesn’t provide gamma control via standard tools, the graphics card has to do correspondingly strong corrections in order to reach the defaults. Although there’s an internal 12 bit LUT, this is why too many colour hues have to be discarded. Hence, the Fujitsu P27T-6 only reaches a tonal range of 92 per cent and misses the certification by three per cent.

The UGRA calibration was carried out with the following presets: Luminance: 23%, Contrast: 51%, Red: 100, Green: 91, Blue: 84.

The detailed UGRA UDACT report can be downloaded as a PDF file.

Generic correction for Colorimeters in Quato iColor Display

Using a colorimeter one has to take into account that those devices are only trained for certain spectra. A spectrophotometer on the other hand, like the EyeOne Pro we use, isn’t subject to such restrictions. However, the sampling accuracy in narrow band spectra can be bounding here. With the X-Rite DPT94 as colorimeter and the EyePro as a reference, we examine how effective the generic correction in Quato iColor Display can be. The results are compared with the uncorrected values. The test is carried out in the course of the profile validation after calibrating the monitor to D65 as white point.

	EyeOne Pro	DTP94	DTP94 (generic cor.)
White point / CCT Kelvin	6511	5760	6530
White point XYZ (normalised)	95.09 100.00 109.10	99.18 100.00 104.12	93.41 100.00 106.39
DeltaE in relation to EyeOne Pro	-	7,71	3,41

As the table shows, the result is being improved by the generic "Wide gamut S-IPS" correction in iColour Display 3,6. The accuracy gain in comparison to a measurement without correction is significant.

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