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REVIEW: Eizo CG246 Part 8


Light density/white (standard image mode, DUE ‘Uniformity’):

Brightness Native D65 5800K D50
100% 270.6 cd/m² 267.7 cd/m² 266.1 cd/m² 249.8 cd/m²
50% - 179.4 cd/m² - -
0% - 52.4 cd/m² - -

Light density/black (standard image mode, DUE ‘Uniformity’):

Brightness  
100% 0.34 cd/m²
50% 0.23 cd/m²
0% 0.07 cd/m²

Light density/white (standard image mode, DUE ‘Brightness’):

Brightness Native D65 5800K D50
100% 309.5 cd/m² 306.3 cd/m² 304.1 cd/m² 294.1 cd/m²
50% - 179.8 cd/m² - -
0% - 52.4 cd/m² - -

Light density/black (standard image mode, DUE ‘Brightness’):

Brightness  
100% 0.33 cd/m²
50% 0.20 cd/m²
0% 0.06 cd/m²

At the default DUE setting (‘Uniformity’), the contrast ratio for the overall range of settings is approx. 760:1. This is possible because the light density is adjusted entirely using the intensity of the backlight. The controllable range is very large. Switching the DUE mode to ‘Brightness’ produced a contrast ratio of at least 910:1. Both of these results are very impressive for an IPS panel.

Viewing angle

The factory figures given for the maximum viewing angle are 178 degrees horizontally and vertically. This is based on a remainder contrast of 10:1. For modern IPS and VA panels, these are typical values. However, they do not sufficiently describe other factors, such as colourimetric changes.

Viewing angle of the Eizo CG246.

The CG246’s IPS panel provides excellent viewing angle stability. Compared to monitors with VA panels, hue and gradation changes are much less pronounced even from steeper angles. A crucial characteristic in this regard is loss of contrast.

Displaying very dark tonal values produces an interesting result: The typical brightening of dark content at an angle is much less than expected. This improves the subjective perception of the black level considerably even from a frontal perspective, as the display is entirely homogeneous right up to the panel edges. The only side-effect is a magenta-coloured shimmer; however, this is only noticeable from very steep angles, and the positive effects provided by the panel’s special surface coating far outweigh this.

Black content is displayed very homogeneously even from a steep angle.

These findings are reminiscent of what LG achieved with its A-TW polarisation coating. This is hardly being used now, the last monitor to feature it being the LM240WU5, an IPS panel with an RGB LED backlight.

Colourimetric testing

Gamut comparison in Lab (D50)

The graphs below are based on the colourimetric data obtained after calibration to D65 as the white point. The reference white for Lab measurements is D50 (adapted with Bradford).

White volume: Monitor gamut
Black volume: Reference gamut
Colour volume: Intersection
Comparison targets: sRGB, AdobeRGB, ECI-RGB v2, ISO Coated v2 (ECI)

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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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