REVIEW: NEC PA241W Part 18

Contents:IntroductionScope of supplyDesign and mechanicsPower consumptionConnectorsControlsOSDScreen managerImage qualityBrightness distributionViewing angleMeasurements and calibrationColour space comparison in lab (D50)3D colour space comparisonColorimetric testsProfile precisionUGRA test (UDACT)Generic correctionsColour space emulation InterpolationInterpolation: GamesImage sharpnessResponsivenessInput lagDVD and VideoVideo signal processingSupported refresh ratesDeinterlacingScalingColour models and signal levelConclusion

sRGB emulation (White point: D50) with chromatic adaptation of the primary colours (according to Bradford).

Representation of the monitor colour space in Lab (D50); sRGB: black grid, monitor colour space: white grid, intersection: coloured area; Emulation with chromatic adaptation of the primary colours.

The result shows the importance of adapting in a chromatically accurate manner. Since only a small number of users will have a program that allows for flexible chromatic adaptation, we also indicated the standard colour values adapted for sRGB and AdobeRGB as per Bradford for a white point of 5800K. This colour temperature is at a level that is useful for many users.

sRGB 5800K (Bradford) White x: 0.326, y: 0.342 Red x: 0.644, y: 0.330 Green x: 0.308, y: 0.600 Blue x: 0.152, y: 0.062

AdobeRGB 5800K (Bradford) White x: 0.326, y: 0.342 Red x: 0.644, y: 0.330 Green x: 0.218, y: 0.707 Blue x: 0.152, y: 0.062

The colour space emulation on the NEC PA241W can also be used for the simulation of colour spaces which go beyond the concrete monitor colour space. Here, the functionality of a CMM with regard to gamut mapping is actually integrated within the monitor’s electronics. Below, we have tried to emulate the ECI-RGB 2.0 colour space. The NEC PA241W achieves coverage of around 88 percent here with the native colour space.

Emulation of the ECI-RGB 2.0 working colour space.

This result is also convincing. The high level of deviations in the primary and secondary colours is due to the undercoverage. The six tertiary colours lie within the colour space of the monitor and are transformed correctly. Here, the electronics deliver the same result as a CMM where a relatively colorimetric rendering intent is indicated.

With the "MultiProfiler" software, NEC has developed extensive screen manager software for the new PA series. All functions that are important from a colorimetric point of view can be controlled using this software.

Some functions of "MultiProfiler".

Contents:IntroductionScope of supplyDesign and mechanicsPower consumptionConnectorsControlsOSDScreen managerImage qualityBrightness distributionViewing angleMeasurements and calibrationColour space comparison in lab (D50)3D colour space comparisonColorimetric testsProfile precisionUGRA test (UDACT)Generic correctionsColour space emulation InterpolationInterpolation: GamesImage sharpnessResponsivenessInput lagDVD and VideoVideo signal processingSupported refresh ratesDeinterlacingScalingColour models and signal levelConclusion

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