Also notice how peak brightness (Y Max) is much lower when testing with a 9% window. The fact that the grey line is much higher when using 9% window testing means that QN95B in reality has a significantly over-brightened image overall. The yellow line is the reference target while the grey line represents measurements. Slide between the two pictures and focus on the 'EOTF' and 'Luminance' graphs to the right. In our QN95B review we found no evidence of the TV surpassing 1300 nits with real content. This is possible because the power supply can send short bursts into the miniLED backlight – these cannot be sustained without damaging the panel. QN95B not only changes its color and luminance tracking during measurements to appear very accurate, it also boosts peak brightness momentarily by up to 80%, from approx. FlatpanelsHD has since identified and documented the issue on Samsung's QN95B 'Neo QLED' LCD TV where it gets even worse. Vincent Teoh of HDTVTest first identified and documented the issue on Samsung's S95B QD-OLED TV. This is deliberate cheating, an orchestrated effort to mislead reviewers. When using a non-standard window such as 9% (everything else equal), the cheating algorithm can be bypassed so the TV reveals its true colors.
Samsung has designed its TVs to recognize this and other commonly used window sizes, after which the TV adjusts its picture output to make measurements appear more accurate than the picture really is. In this window multiple steps from black to white as well as a set of colors are measured. Reviewers, calibrators and certification bodies typically use a 10% window for HDR testing, which simply means that it takes up 10% of the screen. The company promises to provide software updates to address the situation. Samsung has been caught cheating by designing its TVs to recognize and react to test patterns used by reviewers.
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