High color rendering index white laser light source based on RGBY four primary colors

The white laser light source, renowned for its high energy concentration, superior color rendering, and exceptional luminosity, is poised to become a leading choice for next-generation lighting and display technologies. This research presents the synthesis of a superior white laser light source, leveraging RGBY (red, green, blue, and yellow) four-primary-color laser components and advanced wavelength beam combining techniques. The synthesized white laser exhibits a color temperature of 6642 K and a color rendering index (CRI) of 90, Compared to the white light source synthesized using the traditional three-primary-color semiconductor laser method, the color rendering index has seen a significant improvement. The deviation from the standard white light D65 in color temperature is less than 2.1 %. The inclusion of a yellow laser component is critical, effectively bridging the spectral gap and enhancing spectral continuity, thereby significantly improving CRI. This work substantiates the efficacy of four-primary-color semiconductor lasers in white laser synthesis, particularly beneficial for premium lighting and high-definition display applications. It offers novel perspectives on laser utilization in solid-state lighting advancements.