HDR (High Dynamic Range) is a display standard that expands the contrast and color range, showing brighter highlights, deeper shadows, and more colors simultaneously than SDR.
HDR content is mastered with peak brightness up to 4000–10,000 nits and a wider color gamut (typically Rec.2020 or DCI-P3). To display HDR properly, a screen must support these brightness and color targets.
Main HDR formats: HDR10 (open standard, 10-bit), HDR10+ (dynamic metadata, Samsung), Dolby Vision (12-bit, dynamic, premium), HLG (broadcast).
For mobile and laptop displays, "HDR-capable" often means peak 600–1000 nits — meaningful but well below cinema HDR. Real HDR experience needs at least 1000-nit sustained brightness and local dimming.