Designing display primaries with currently available light sources for UHDTV wide-gamut system colorimetry

Abstract

The wide-gamut system colorimetry has been standardized for ultra-high definition television (UHDTV). The chromaticities of the primaries are designed to lie on the spectral locus to cover major standard system colorimetries and real object colors. Although monochromatic light sources are required for a display to perfectly fulfill the system colorimetry, highly saturated emission colors using recent quantum dot technology may effectively achieve the wide gamut. This paper presents simulation results on the chromaticities of highly saturated non-monochromatic light sources and gamut coverage of real object colors to be considered in designing wide-gamut displays with color filters for the UHDTV.

Achieving a foldable and durable OLED display with BT.2020 color space using innovative color filter structure

“…BT.2020 specification is the standard for ultra‐high‐definition content, which can reproduce almost all the nature colors . We published flexible OLED panel with more than 100% NTSC color space in previous works; however, the three primaries only covered about 78% of BT.2020 with the top‐emission AMOLED structure.…”

“…BT.2020 specification is the standard for ultra-high-definition content, which can reproduce almost all the nature colors. 14 We published flexible OLED panel with more than 100% NTSC color space in previous works; however, the three primaries only covered about 78% of BT.2020 with the topemission AMOLED structure. In order to realize BT.2020 color space by AMOLED display without significantly sacrificing device efficiency or viewing angle properties, several approaches were adopted to achieve the target.…”

Single display gamut size metric

“…When a non‐Rec.‐709 primary is chosen from one of the sample areas, it is possible to select the other one or two primaries from outside of the sample areas. In the simulation, however, only primary sets that fell entirely within the sample areas were used in order to ensure hue balance in the gamut coverage …”

“…Although liquid crystal displays (LCDs) are considered promising as UHDTV displays and laser‐backlit LCDs attain the Rec. 2020 color space, non‐monochromatic light sources may also be used due to their cost and performance benefits . Many displays that support the Rec.…”

“…2020 color space, 6 non-monochromatic light sources may also be used due to their cost and performance benefits. 7 Many displays that support the Rec. 2020 color space are commercially available, although their gamut coverages vary.…”