REVIEW: Hyundai W220S Part 5
We measured the brightness distribution at 15 points on the screen after reducing the brightness to 58 percent and this achieved a value of 139 cd/m² in the centre of the screen as an ideal value.
Brightness distribution on the Hyundai W220S, measured at 15 points.
The stable result of the objective measurement of the brightness distribution was in contrast to our subjective impression. The maximum deviation of about 9 percent is in the middle of the screen at the bottom and represents a good result. The average deviation of 4.1 percent is at a high level. Unfortunately, the subjective image impression cannot confirm this result, since the light patch can still be seen when particular image content is displayed.
According to the manufacturer, the viewing angle is 160 degrees horizontally and vertically at a contrast ratio of 10:1. However, these details are based on the resting contrast and not on whether the image is subject to colour errors at particular viewing angles.
The image in the centre shows a frontal view of the screen and beside it, the horizontal (left/right) viewing angles and above and below, the vertical viewing angles (above/below).
In practice, pronounced colour errors appear in addition to the reduction of the contrast. Thus, the image took on a reddish tint when viewed from the side, whilst the image was greenish when viewed from above. On the other hand, the image collapses when viewed from below and the negative effect, which reverses the colours, arises. The resting contrast is convincing on the horizontal.
Below, we tested the colour accuracy of the Hyundai W220S and tested how well the LCD monitor could be calibrated. The results are mainly of interest for graphics and photo editing. They are largely negligible for office use and games, since the subjective impression is more important for these applications.
First, we measured the maximum colour space of the LCD and compared it with the ISO Coated printing colour space and the sRGB colour space.
sRGB is the lowest common denominator for interaction between various input and output devices in the consumer sector. In addition, Windows assumes sRGB if no colour profile is present for a device or graphics file. This is also why the sRGB colour space is significant for "normal users" unlike the ISO Coated printing colour space.
The spread of digital mirror reflex cameras and increase in amateur photography, photo services have switched many of their exposure machines to the sRGB colour space in order to spare their customers having to deal with special colour spaces.
The comparison with the ISO Coated colour space used in offset printing is interesting, since this generally represents the least that modern inkjet printers can manage. Many modern inkjet printers and printing processors also cover an even larger range.
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