Six-primary color projection display for expanded color gamut reproduction

A range of the reproducible color, i.e., color gamut, of the conventional display devices such as CRTs (cathode ray tubes) and LCDs (liquid crystal displays) is sometimes insufficient for reproducing the natural color of an object through color imaging systems. In this paper, a six-primary color display is developed to reproduce the expanded color gamut, by using two conventional RGB projectors and six interference filters. The filters are designed to maximize the volume of color gamut in CIE-LUV uniform color space. The experimental result is also demonstrated to confirm that 99.6 percent of the Pointer gamut (referred as the maximum gamut of real surface colors) is covered by the prototype system.