REVIEW: Eizo HD2441W-TS Part 10
Eizo has advertised the maximum brightness for the HD2441W-TS 450 Candela per m² (cd/m²). The test model we used achieved a maximum brightness 423 cd/m² according to our measurements, which is 27 cd/m² more than the value indicated by the manufacturer. The lowest brightness we measured was 72 cd/m². This value is a positive one, since especially recently, more and more monitors are coming to the market with minimum brightness levels that are considerably higher than 100 cd/m².
The monitor also boasts a brightness sensor as an extra feature. Three settings are available in the OSD for this sensor: Off, Standard and High. If the brightness sensor is active, it adjusts the brightness of the monitor automatically to the lighting conditions of the monitor’s environment.
According to Eizo, the HD2441W-TS’ maximum dynamic contrast is 3,000:1 an. Eizo has not provided details regarding the normal contrast value. Dynamic contrast can be deactivated in the OSD. The contrast value that can be reached in practice does depend largely on the current settings.
In the factory settings, we were able to reach a contrast of 1410:1. When calibrated to the sRGB values (brightness 120 cd/m²), the monitor achieves a contrast ratio of 1200:1. After the calibration we carried out (values can be found in the table further below) the HD2441W-TS managed a contrast of 1390:1.
Dynamic contrast was deactivated for all measurements except for those made when the monitor was in its factory settings.
Like its predecessor, the S2410W, the Eizo HD2441W-TS features direct backlighting. For direct backlights, the fluorescent tubes are not positioned at the edges of the panels as is normally the case, but are instead placed in a U shape over the monitor’s entire display surface (U-shaped CCFL / CCFL = Cold Cathode Fluorescent Lamp).
Schematic representation of direct backlight.
Our test model demonstrated a very slight lightening in the upper left corner when we examined the illumination, but this is only visible in a darkened room when a completely black image is displayed. In normal light circumstances, the lightening is not visible.
This picture was taken in a darkened room at a brightness setting of 100 percent and a contrast value of 50 percent.
We measured brightness distribution at 15 points across the entire display surface. The guide value for brightness was taken from the centre.
Measured brightness distribution on the Eizo HD2441W-TS.
Our measurements show that the brightness is slightly higher in the upper and right edges. The largest deviation from the guide value (139 cd/m²) is 13,9 % or 122 cd/m² and is located in the lower left corner. Overall, we rate the brightness distribution of our test model as good.
We would like to point out that illumination and brightness distribution in LCDs is subject to a certain amount of scattering and can vary from monitor to monitor.
Eizo has stated that the vertical and horizontal viewing angles of the HD2441W-TS are178 degrees. Up to 170 degrees, the viewing angles remain stable and beyond that, a slight but visible darkening of the colours can be seen.
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