REVIEW: Philips 220CW9FB Part 8

Contents:IntroductionScope of supplyDesign and mechanicsPower consumptionConnectorsControlsOSDSmartControl II screen mangerImage qualityBrightness distributionViewing angleMeasurements and calibrationColour space comparison3D colour space comparisondeltaE deviationUGRA-TestInterpolationInterpolation GamesApplicationsResponsivenessInput lagDVD and VideoVideo signal processingSupported refresh ratesVideo scalingConclusion

Comparison of factory setting with sRGB standard

Factory setting	sRGB standard	Measured
White point / Kelvin	6500	6329
Brightness / cd/m²	140	264
Black point / cd/m²	0,00	0,26
Contrast / x:1	Native	1014
Gamma / average	sRGB (~2,2)	2,67

In its factory settings, the Philips 220CW9FB only matches the sRGB profile to a limited extent. Although the colour values and white point are relatively well matched, the grey values and especially the gamma value are unconvincing. Unfortunately, the human eye is especially sensitive to grey values and therefore, this failing is clearly visible. A good average deltaE deviation of 3,9 cannot improve the overall impression.

Comparison of Image Display mode with sRGB standard

Image Display Mode	sRGB standard	Measured
White point / Kelvin	6500	6330
Brightness / cd/m²	140	260
Black point / cd/m²	0,00	0,26
Contrast / x:1	Native	999
Gamma / average	sRGB (~2,2)	3,27

As well as the image modes Office Work, Entertainment and the Economy mode, we also tested the Image Display mode in particular with regard to the deviation of the colour values. Here, the gamma, which has increased to 3,27, and the deviations in the grey values, which far exceed our diagram, stand out in particular. The average deltaE is 8,4. The Image Display image mode can only b described as unusable.

Comparison of calibrated profile with sRGB

Calibrated	Goal	Measured
White point / Kelvin	6500	6530
Brightness / cd/m²	140	139
Black point / cd/m²	0,00	0,17
Contrast / x:1	Native	818
Gamma / average	sRGB (~2,2)	2,16

After calibration to sRGB, the 220CW9FB delivers a stunning result: the white point, brightness and gamma are almost optimal whilst the contrast drops to a still good 818:1. The largest deltaE deviation is a respectable 1.2 and the average is 0,6. It doesn’t get any better than this.

It was necessary to correct the colour settings somewhat in the OSD. For calibration to the sRGB standard, we selected the following settings: brightness: 56 %; contrast: 50 %; Red: 83; Green: 84 and Blue: 86.

Contents:IntroductionScope of supplyDesign and mechanicsPower consumptionConnectorsControlsOSDSmartControl II screen mangerImage qualityBrightness distributionViewing angleMeasurements and calibrationColour space comparison3D colour space comparisondeltaE deviationUGRA-TestInterpolationInterpolation GamesApplicationsResponsivenessInput lagDVD and VideoVideo signal processingSupported refresh ratesVideo scalingConclusion

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