VESA HDR certified laptops
VESA HDR certified
— VESA DisplayHDR certified, which corresponds to an HDR-enabled screen.See above for more details on this technology. And VESA DisplayHDR is an open standard that defines the overall image quality on an HDR screen by number of parameters — brightness, colour depth, etc. Based on the test results, screen that meets the required parameters is assigned certain certificate with numerical designation. So, the minimum level is DisplayHDR 400, the maximum is DisplayHDR 1400 (although in laptops, as of the end of 2021, there are no screens higher than DisplayHDR 1000). The number in such designation is indicated by the brightness that the screen must provide: for example, DisplayHDR 400 must produce at least 400 cd / m2. Accordingly, higher number denotes more extensive display capabilities and more advanced HDR performance.
Separate case is the DisplayHDR True Black certifications. This standard was specifically created for so-called emissive displays such as OLED (see "Matrix type"), which are capable of displaying very deep blacks. The native brightness of such displays is not very high — in particular, the current DisplayHDR 400 True Black and DisplayHDR 500 True Black provide total screen brightness of only 250 and 300 cd / m2, respectively (against 400 and 500 cd / m2 in the original standards, without the addition " True Black"). However, in terms of black transmission efficiency, such displays surpass conventional HDR counterparts by orders of magnitude, which gives noticeable increase in image quality — in particular, the mentioned True Black standards with indexes 400 and 500 win even when compared with conventional DisplayHDR 1000. However, it should be taken into account that that this advantage is most noticeable in relatively dim ambient light.
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