Laser-driven phosphor conversion (PC)-type white light sources are receiving a great deal of attention in next-generation high-intensity lighting and display technologies. Laser lighting is attracting attention for its functions, such as energy saving and light distribution control. However, the PC-type white light source has problems with color control and thermal quenching. Thus, monochromatic light mixed- or color mixed (CM)-type white light sources are promising, but there is a problem with their color rendering properties. We investigated the CM-type white light sources that mix four colors (blue, green, yellow, and red). We have improved the color rendering index (CRI) of a four-color mixed laser. By maximizing the value through combining the wavelength of four colors and each laser output ratio, the average CRI R_a and the special CRI R₉ can be obtained when the color temperature used in general lighting is approximately 5000 K. The color rendering property was predicted by the combination of laser output ratios, and a light source with an R_a of 80 or more and R₉ of 94 was obtained experimentally. At the same time, we were able to demonstrate the high luminous efficacy of radiation.

激光驱动荧光粉转换 (PC) 型白光源在下一代高强度照明和显示技术中受到广泛关注。激光照明因其节能、配光控制等功能而备受瞩目。然而，PC型白光源存在色彩控制和热猝灭的问题。因此，单色混光或混色(CM)型白光源很有前景，但它们的显色性能存在问题。我们研究了混合四种颜色（蓝色、绿色、黄色和红色）的 CM 型白光源。我们改进了四色混合激光的显色指数 (CRI)。通过结合四种颜色的波长和每种激光输出比来最大化该值，平均 CRI R _a特殊显色指数 R ₉在一般照明使用的色温约为 5000 K 时可得到。显色性是通过激光输出比的组合预测的，光源的R _a为 80 或更高，R 94个中有_{9个是通过实验获得的。}同时，我们能够证明辐射的高发光效率。