JP-2022553434-A5 -

Dates

Publication Date

20230512

Application Date

20201209

Description

The red, blue, and green spectral components may have an irritation purity of less than 0.95. In some embodiments, each of the red, blue, and green spectral components has an irritation purity of less than 0.95. The red spectral component may have an irritation purity in the range of 0.8 to 0.94. The green spectral component may have an irritation purity in the range of 0.8 to 0.94. The blue spectral component may have an irritation purity in the range of 0.4 to 0.5. In some embodiments, the red and green spectral components each have an irritation purity in the range of 0.8 to 0.94, and the blue spectral component has an irritation purity in the range of 0.4 to 0.5. In some embodiments, the synthetic white light 190 has a stimulating purity of less than 0.95 for the red, blue, and green spectral components. Stimulating purity is a measure of the difference from the white point of the light source to the furthest point on the chromaticity diagram of the same hue. Using the CIE 1931 color space, stimulating purity can be calculated by formula I. Here, (x n , y n ) is the chromaticity of the white point, and (x I , y I ) is a point on the periphery where the line segment to the white point contains the chromaticity of the stimulus. In some embodiments, the irritation purity of the red spectral component is in the range of 0.7 to 0.98, or 0.75 to 0.96, or 0.8 to 0.94. In some embodiments, the irritation purity of the green spectral component is in the range of 0.7 to 0.98, or 0.75 to 0.96, or 0.8 to 0.94. In some embodiments, the irritation purity of the blue spectral component is in the range of 0.3 to 0.6, or 0.35 to 0.55, or 0.4 to 0.5. In some embodiments, the red spectral component has an irritation purity in the range of 0.8 to 0.94, the green spectral component has an irritation purity in the range of 0.8 to 0.94, and the blue spectral component has an irritation purity in the range of 0.4 to 0.5. Specific embodiments of the present disclosure relate to an LED device in which the synthesized white light has a red spectral component with a stimulating purity in the range of 0.8 to 0.9, a green spectral component with a stimulating purity in the range of 0.8 to 0.9, a blue spectral component with a stimulating purity in the range of 0.4 to 0.5, a color rendering index (CRI) of 90 or more and R9 of 50 or more, and a TM-30-18 gamut index (Rg) of 100 or more over a target correlated color temperature (CCT) range of 2700K to 6500K.