REVIEW: BenQ EW2430 Part 3

Contents:IntroductionScope of supplyOptics and mechanicsTechnologyOperating noisePower ConsumptionConnectionsOperationOSDPicture qualityGreyscale and black screenBrightness, contrast and black levelBrightness distributionViewing anglesColour reproductionMeasurements and calibrationColour space comparison3D colour space comparisonColorimetric testssRGB profile accuracyUGRA testInterpolationResponsivenessLatencySoundDVD and VideoVideo signal processingSupported refresh ratesDeinterlacingScalingOverscanColour models and signal levelsRatingConclusion

Picture quality

The surface of the A-MVA panel is matte, but does not have very effective anti-reflective coating. Lateral light sources or light-coloured clothing produce clearly visible reflections on the screen.

If reset, the monitor adjusts to the following values: brightness 100, contrast 50, standard picture mode, gamma 3, colour temperature normal. Automatic contrast control is switched off. These values are used for the subsequent assessment at defaults.

Greyscale and black screen

The factory setting shows a uniform grey curve without banding, while strays of greenish colour cast are perceivable in the middle grey scale.

Grey levels and black image

During greyscale testing, the EW2430 is able to differentiate almost all shades of grey, only the brightest will be truncated.

The remarkably deep black colour brightens towards the edges.

The black test card is reproduced remarkably dark by the EW2430. Being almost entirely black in the centre, the panel brightens up visibly towards the edge regions.

Such distinctive dependence of the black value from the viewing angle we have been able to observe with all A-MVA panels. Viewed frontally, the black is so deep that the four darkest shades of grey also are lost. But even from a small lateral angle, the black screen area looks much brighter, although all dark grey shades appear well differentiated now.

The apparent edge brightening of the black card does not occur through the translucent backlight, but through the viewing angle increasing outwardly.

Brightness, contrast and black level

Brightness and contrast gradient.

Brightness ranges from 63 to 279 cd/m2 and thus is very favourable for PC operation. The maximum value is still sufficient for the display of films and photos in well lit rooms.

The measured black levels are very low. At full brightness, we measure only 0.17 cd/m2. From that, a superb contrast ratio of 1,600:1 can be calculated, which remains constant over the entire range of adjustment. Admittedly, the manufacturer's specification of 3,000:1 is not quite achieved.

Contents:IntroductionScope of supplyOptics and mechanicsTechnologyOperating noisePower ConsumptionConnectionsOperationOSDPicture qualityGreyscale and black screenBrightness, contrast and black levelBrightness distributionViewing anglesColour reproductionMeasurements and calibrationColour space comparison3D colour space comparisonColorimetric testssRGB profile accuracyUGRA testInterpolationResponsivenessLatencySoundDVD and VideoVideo signal processingSupported refresh ratesDeinterlacingScalingOverscanColour models and signal levelsRatingConclusion

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