REVIEW: NEC EA231WMi-BK Part 10
Typically for LCDs, a completely sharp image is only shown in the native resolution. Each pixel of the signal is allocated precisely one pixel on the monitor. At all other non-native resolutions, the integrated electronics must upscale the source resolution to the resolution of the panel. For physical reasons, there is always some blurring and shadow formation as a result of this process, but fortunately, this is limited on the EA231WMi. As well as the native resolution, we found that the resolutions 1.440 x 900 and 1.280 x 720 were especially legible.
The format display is also convincing. From 5:4 and 4:3 to 16:10 – all formats are accepted and displayed in justified format. As we will see in the Scaling section, the 576p signal is an exception in this regard.
In the game Anno 1701, many sharp edges can be seen, which reflect the interpolation behaviour well. The flags hanging in the wind should be used as a reference point. Anti-Aliasing, which reduces step formation at edges, was deactivated in the driver and the game.
Left: the native Full-HD resolution 1.920 x 1.080; right: the smallest HD resolution 1.280 x 720.
Left: 1.680 x 1.050; Right: 1.440 x 900 (Source aspect ratio: 16:10; justified display).
Resolution 1.280 x 1.024; Left: justified, right: stretched to full screen
As expected, the NEC EA231WMi performs better in the interpolation of moving pictures than in text display. Here, no display other than the native resolution stands out in terms of the degree of sharpness, neither in a positive nor a negative sense. Generally, we can say that the display quality increases with a higher resolution.
Overall, the NEC EA231WMi achieves a good result in terms of its interpolation capability. For a better rating, we would have hoped for sharper display of non-native resolutions and pixel-precise display. Here, scaling via the graphics card may help. However, modern cards often have problems with this option, which is why interpolation via the monitor is preferable.
According to the manufacturer’s information, the eIPS-Panel of the EA231WMi has a response time of 14 milliseconds. These days, TN panel monitors are advertised as having response times of up to 2 milliseconds. Considering this, the NEC EA231WMi is excluded at first glance for use as a gaming monitor, but Prad put it through a detailed games test.
Picture from the tactical shooting game "Counterstrike: Source".
Normally, Overdrive solution is used in IPS, PVA and even some TN panels, which increases the response time of the liquid crystals through an impulse of electricity. If this solution is poorly integrated, an input lag or corona effect may arise, leaving a glow at moving edges. Here, we can give the all-clear: neither in synthetic tests nor in real usage can such effects be observed.
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