REVIEW: ViewSonic VP2250wb Part 10

sRGB: 94.8 % coverage

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AdobeRGB: 92.9 % coverage

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ECI 2.0: 90.3 % coverage

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The sRGB colour space is covered by the VP2250wb for up to 94.8 percent, which is a good result. For the AdobeRGB colour space, the monitor achieves 92.9 percent and for the ECI 2.0-Gamut, the monitor covers 90.3 percent, both also convincingly good results.

Explanation of deltaE deviation: The deviation of colour values is measured in deltaE 94 (dE). Numerous grey gradients, the primary (RGB) and secondary (CMY) basic colours are measured. A deltaE value of 1 represents the smallest difference in colour that can be perceived by the human eye. Most people notice a difference in colour from a value of 3. However, our eyes are more sensitive to green tones, so we notice smaller differences in these colours. The average deviation should be less than 3 dE and the maximum should be under 10 dE, but better under 6 dE. Up to 10 dE, two colours are still sufficiently similar.

Comparison of factory settings with sRGB standard

Factory setting	SRGB standard	measured
White point / Kelvin	6500	5702
Brightness / cd/m²	140	276
Black point / cd/m²	0,00	0,40
Contrast / x:1	Native	689
Gamma / average	sRGB (~2,2)	2,25

In its factory settings, the VP2250wb is almost at a good level for grey gradients, whilst the deltaE deviations for the primary and secondary colours are clearly visible as compared with the sRGB standard. The colour temperature is too warm for Internet and office work. The average deltaE deviation is 6,3.

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