To enable the Dark Matter 43548’s HDR mode, toggle it on in the Gaming Setup menu before applying an HDR10 signal. Windows won’t recognize the HDR compatibility otherwise. When your app goes back to SDR mode, switch HDR off.
HDR Brightness and Contrast
The 43548 doesn’t use dynamic contrast in HDR mode, so its performance is about the same as SDR. The two signal types don’t look any different. But if you’re playing HDR games or video, you should switch the mode on to get correct tone mapping. With 1,268.7:1 HDR contrast, there’s no extra image depth or color saturation.
Grayscale, EOTF and Color
There are no image adjustments for HDR content, so things will look a tad warm, especially in brighter parts of the screen. Errors in the middle and darker tones are minimal. Luminance tracking is nearly spot-on, which means HDR tone-mapping is correct. Even though HDR content doesn’t look any different from SDR, you should turn on the HDR mode when playing HDR games and video.
In the gamut test, I compared both Rec.709 and DCI-P3 to the 43548’s actual color rendering. You can see that DCI-P3 content will be a tad redder, and that secondary colors follow the correct path for each color space. While extended color would be nice, the 43548 follows the right targets and tracking in its HDR mode.