Six-primary-laser projection display system: demonstration and stereo color gamut measurement

The mainstream light sources of display systems currently include LEDs, OLEDs, micro-LEDs, and lasers, primarily based on the three primary color systems with different color rendering abilities. A narrow-spectrum light source, such as laser, is typically used to enlarge the color gamut of a display system. Another approach is to add more primaries. In this regard, we develop a six-primary-laser projection display system compatible with 2D and 3D display, with wavelengths of 445 nm, 465 nm, 520 nm, 550 nm, 638 nm and 660 nm. We propose a simple, fast method to determine the luminance of each primary laser, by which the gamut volume can be calculated. We also propose a gamut measurement method for the six-primary-laser display system, describe the gamut boundary, and measure the gamut volume. The calculated maximum color gamut of the proposed system is 2347400, corresponding to 184.49% NTSC, while the measured color gamut is 2269900, corresponding to 178.4% NTSC. These results are in good agreement with the theoretical calculations, indicating the accuracy of the proposed analytical and experimental methods. Moreover, the time-multiplexed stereoscopic display technology and the spectral separation method would allow the development of a remarkable three-dimensional visual experience with high light efficiency and low crosstalk in full-field of view. (C) 2021 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

The article presents the mainstream light sources used in current display systems and introduces the development of a six-primary-laser projection display system. A simple and fast method for determining the luminance of each laser and calculating the gamut volume is proposed, along with a gamut measurement method. Experimental results show good agreement with theoretical calculations, confirming the accuracy of the proposed analytical and experimental methods.