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REVIEW: Eizo CG246 Part 7


Image homogeneity

We tested the image homogeneity using four test images (white; neutral tones with a brightness of 75%, 50%, 25%), for which we measured 15 different points. From these, we calculated an averaged brightness deviation as a percentage as well as an averaged DeltaC (i.e., colour difference) in relation to each centrally measured value.

15 measurement points were used to test brightness distribution (left chart, percentage) and colour purity (right chart, DeltaC) – DUE: ‘Uniformity’.

The CG246’s DUE (Digital Uniformity Equalizer) completely smoothes out any irregularities. Any brightness or colour deviations that might occur are so subtle they cannot be seen or measured on the screen.

The DUE’s corrections are based on factory-set calibration segments with different brightness levels. By design, this very slightly reduces the white level and the contrast range.

For the first time, Eizo is offering a basic configuration of the DUE here: Via a button combination specified in the user manual, you can disable one of the calibration segments (‘Brightness’ setting). This function can also be accessed from within Color Navigator.

DUE setup in Color Navigator.

This way you can increase the contrast range, as the adjustments only start at the midtones. This has no significant effect on the measured values, as the function is not disabled completely. The following results are for a white image only:

15 measurement points were used to test brightness distribution (left chart, percentage) and colour purity (right chart, DeltaC) – DUE: ‘Brightness’ (white image only).

Brightness, black level, contrast

Measurements were made following calibration to D65 as the white point. All adjustable dynamic controls were disabled. Due to the given settings, the test results were lower than they were for the native white point.

The measurement window did not have a black border. As a result, the measured values are more comparable to the ANSI contrast, and are much more telling of real-world situations than measurements of full-screen white and black images.

Brightness and contrast curves of the Eizo CG246 – standard image mode, D65 (left: DUE ‘Uniformity’; right: DUE ‘Brightness’).

With a native white point, the maximum measurement was approx. 310 cd/m². This is very close to the factory measurement of 300 cd/m².

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3 Comments available


Thanks for this review, I bought this display, by far the best one I've owned.
I'd need an information: I 'm about to buy a device that use hdmi to output a 10bit video signal, but only dp is 10 bit in the 246; so is enough to use a hdmi/dp cable or adapter or I'll have 8 bit signal?

sam
I'm unable to guarantee that. You will need a HDMI to DisplayPort converter - not a simple cable - because of different protocols used. A 10bit workflow is in principle not a problem but it depends on the capabilities of this converter.
Perfect, I'll look for a proper converter,
thanks a lot

best regards
sam

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