Not everything is going right with the televisions from the South Korean manufacturer Samsung. He designed his TV sets in such a way that they recognize the test patterns used by examiners for HDR tests – and react to them. This was discovered by Vincent Teoh from HDTV Test.
In a YouTube video, Vincent Teoh from HDTV Test revealed that Samsung TVs cheat in HDR tests. He demonstrated this using the Samsung OLED S95B as an example and made it clear “why people are wrong about the ‘superior’ brightness and colors” of the model. To do this, Teoh took measurements in both a regular and a test window – the latter is usually reduced to 10 percent of the screen size for HDR tests. The result: Outside of test windows, an algorithm visibly increased the brightness of the TV set.
“A deliberate attempt to mislead examiners”
While Vincent Teoh first identified and confirmed the problem on Samsung’s OLED S95B a test of the QN95B “Neo QLED” through Flatpanels HD the result and sometimes found even higher deviations. Not only did the QN95B change its color and luminance guide during measurements to appear accurate, but it also briefly increased peak brightness by up to 80 percent (from around 1300 nits to 2300 nits). This is made possible by intermittent, brief power surges from the power pack for the LED backlight. These cannot be sustained without damaging the panel.
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Meanwhile, Flatpanels HD asked Samsung for a statement on the allegations. The group responded to the request as follows: “Samsung remains committed to relentless innovation to provide our customers with the best picture quality. To provide consumers with a more dynamic viewing experience, Samsung will provide a software update that will provide consistent brightness of HDR content over a wider range of window sizes than the Industry standard guaranteed.” The update for the S95B has now taken place, for the QN95B and presumably other devices it is still pending.
Source: via WinFuture
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