REVIEW: Lenovo L2440p Part 9

The factory setting in "reddish" mode does not demonstrate a reddish white in any way, as the name would allow you to guess, but instead offers completely balanced display with a slightly too cool white at 6712 Kelvin. At this setting, the evenness of the individual colour deviations is pleasing – as expected, with the exception of blue, these are all less than 4 DeltaE. The settings are not completely ideal, and for grey hues, where the human eye is especially sensitive to small colour deviations, the deviations are high overall, but the average value of 2.4 deltaE is a good value.

This mode is suityable3 for everyday use without additional limitations. For graphics work, some adjustments should be made, but in films, too, the colours look largely natural. This image is typical for a model with an sRGB colour space.

Comparison of factory setting "sRGB" with sRGB standard

"sRGB" mode	sRGB standard	Measured
White point / Kelvin	6500	6724
Brightness / cd/m²	140	265
Black point / cd/m²	0,00	0,32
Contrast / x:1	Native	827
Gamma / average	sRGB (~2,2)	2,34

The monitor’s pre-defined sRGB Modus is astonishingly identical to the "Reddish" mode, which means that the statements we made previously also apply here.

Comparison of factory setting "neutral" with sRGB standard

"neutral" mode	sRGB standard	Measured
White point / Kelvin	6500	6897
Brightness / cd/m²	140	269
Black point / cd/m²	0,00	0,33
Contrast / x:1	Native	816
Gamma / average	sRGB (~2,2)	2,25

The monitor’s "neutral" mode is anything but. The white point, at almost 6900 Kelvin, is considerably too cool. Depending on the user’s own preference, this mode could still be used for viewing films, since it may cause some colours to look somewhat fresher.

Comparison of calibration to sRGB with sRGB standard

Calibrated	Goal	Measured
White point / Kelvin	6500	6497
Brightness / cd/m²	140	139
Black point / cd/m²	0,00	0,20
Contrast / x:1	Native	694
Gamma / average	sRGB (~2,2)	2,19

After calibration to sRGB, the deviations amongst the grey hues are almost perfect, but on the other hand, there is a noticeably large deviation of 8.6 deltaE for blue. The measurement values for the factory setting "reddish" were better adjusted for the colour hues, by contrast, and were weaker for grey tones.

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