Impact of color temperature on the color gamut volume of a six-primary-laser display system

Abstract

ObjectiveColor temperature (CT) is closely related to the color gamut of a display system. It is important to investigate how the color gamut volume and gamut coverage vary with the CT. MethodsThe effects of the CT on gamut volume and coverage in a six-primary-laser display system (in which color was achieved through a fixed mixture of two sets of three-primary) were investigated, both theoretically and experimentally. ResultsThe results indicated that the gamut volume increased rapidly from 64.19% to 139.99% Rec. 2020 when the CT increased from 2000 K to 12,500 K and then increased gradually to 142.4% at 20,000 K. The gamut coverage first increased to the maximum at 5000 K and then decreased. At 5000 K, the gamut volume was moderate, but the gamut coverage was the highest. Between 10,000 and 12,500 K, the gamut volume increased significantly, and the gamut coverage remained relatively high. At 20,000 K, the gamut volume was the largest, whereas the gamut coverage was relatively low. Accordingly, in the six-primary-laser display system, from the perspectives of improved gamut coverage and color management, D50 could be a safer recommendation; for better rendering ability, the CTs between 10,000 K and 12,500 K could be adopted.