REVIEW: BenQ EW2430 Part 4

Brightness distribution and colour homogeneity

Measured values of the white test card; left: brightness distribution, right: colour homogeneity.

At first, the average of 92 per cent that we achieve at brightness distribution seems good. But brightness, however, rather partially declines in the upper screen area, with both top corners already close to the visibility limit of 20 per cent. On closer inspection, the brightness decrease at the upper screen is already visible with the naked eye, the white card looks a bit cloudy and unsteady.

Colour uniformity is much better. Our measurement results in an average of only 1.1 deltaC, whereas maximum values all lie in the left fifth and remain well below the limit of 4.0.

Viewing angles

The photo shows the screen area of the EW2430 seen from angles of +/-70 degrees horizontally and +60 and -45 degrees vertically.

Horizontal and vertical viewing angles.

The most natural colour reproduction, as well as the deepest black, is obtained from frontal plan view. Apart from the decline of black, the image impression at angles up to about 30 degrees stays fairly constant. Above, the screen brightens up while the image contrast shows a large slowdown. Though colours fade, they barely shift. Above about 60 degrees, there is not much further change.

In juxtaposition with significantly more expensive upper-class VA panels, the result, of course, is not convincing. Similarly priced TN panels, however, are beaten by far: The image remains much more stable in all directions, even changes proceed more uniform.

For photo editing, you should use the EW2430 only for a hobby. But as far as the teamwork at the office or movie nights with friends are concerned, colour stability is perfectly fine.

Colour reproduction

Measurements and calibration

After measuring the BenQ EW2430 extensively before and after calibrating and profiling, we evaluate the results, which are of particular interest for digital image processing. As far as office and game applications are involved, sufficient neutrality of the screen is important at the least. All measurements are analysed with the help of our self-developed software. This allows exact and detailed statements on the present test model.

Colour space comparison in Lab (D50)

At first, we measure to what extent the monitor is able to cover various colour spaces. As a reference, we use the sRGB working space. In addition, we compare with the ISO Coated V2 profile that is based on the FOGRA39 characterization data and represents standard printing conditions for offset printing on certain paper types. Specific conditions can be viewed as PDF document. Since this monitor does not have an expanded colour space, we do not carry out a comparison with Adobe RGB and ECI RGB 2.0.

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