Light emitting device
AssigneeNichia Corporation
InventorsKenta Niki, Jun Takahashi
Life of this patent
Estimating the term…
Abstract
A light emitting device includes one or more light emitting elements and a plurality of fluorescent materials, and emits a first light, a second light, and a third light, wherein the first light has a correlated color temperature between 1,500 K and 3,500 K and a color rendering index R9 of 50 or more, the second light has a correlated color temperature between 3,500 K and 5,500 K and a color rendering index R9 of 50 or more, the third light has values of X and Y coordinates in the chromaticity diagram of the CIE1931 color system smaller than the values of X and Y coordinates at a color temperature of 5,500 K on the black body radiation locus, and a light having a correlated color temperature of 6,500 K has a color rendering index R9 of 50 or more and a melanopic ratio of 1.0 or more.
Claims13
A light emitting device,
- comprising one or a plurality of light emitting elements and a plurality of fluorescent materials;
- emitting
- two or more single lights including at least a first single light and a third single light among the first single light, a second single light, and the third single light;
- wherein the first single light is a light emitted from one or a plurality of light emitting elements, and one or a plurality of fluorescent materials including a fluoride fluorescent material having a light emission peak in the vicinity of 630 nm among one or a plurality of the light emitting elements and a plurality of the fluorescent materials;
- and
- the first single light has a first color temperature with a correlated color temperature in a range of 1,500 K or more and 3,500 K or less, and a color rendering index R9 of 50 or more;
- wherein the second single light is a light emitted from one or a plurality of light emitting elements, and one or a plurality of fluorescent materials including a fluoride fluorescent material having a light emission peak in the vicinity of 630 nm among one or a plurality of the light emitting elements and a plurality of the fluorescent materials;
- and
- the second single light has a second color temperature with a correlated color temperature in a range of 3,500 K or more and 5,500 K or less that is higher than the first color temperature, and a color rendering index R9 of 50 or more;
- wherein the third single light is a light emitted from one or a plurality of light emitting elements, and one or a plurality of fluorescent materials including fluorescent materials different from one or a plurality of the fluorescent materials contained in at least the first single light;
- and
- the third single light has values of X and Y coordinates in the chromaticity diagram of the CIE1931 color system that are smaller than the values of X and Y coordinates at a color temperature of 5,500 K on the black body radiation locus, and a value of melanopic ratio of 1.80 or more;
- wherein a light having a correlated color temperature of 6,500 K composed of two or more lights including at least the first single light and the third single light among the first single light, the second single light, and the third single light, has a value of melanopic ratio of 1.0 or more, and a color rendering index R9 of 50 or more at a correlated color temperature at least in a range of 3500 K or more and 5000 K or less.
A light emitting device,
- comprising one or a plurality of light emitting elements;
- a plurality of fluorescent materials including at least rare earth aluminate fluorescent materials, rare earth aluminum garnet fluorescent materials, and fluoride fluorescent materials having a light emission peak in the vicinity of 630 nm;
- and
- emitting
- a light having a fluorescent from the fluoride fluorescent materials, a first color temperature with a correlated color temperature in a range of 1,500 K or more and 3,500 K or less, and has a color rendering index R9 of 50 or more;
- a light having a fluorescent from the fluoride fluorescent materials, a second color temperature with a correlated color temperature in a range of 3,500 K or more and 5,500 K or less that is higher than the first color temperature, and has a color rendering index R9 of 50 or more;
- a light having a fluorescent from the fluoride fluorescent materials and a single light, a correlated color temperature of 6,500 K, a color rendering index R9 of 50 or more and a melanopic ratio of 1.0 or more, wherein
- the single light has values of X and Y coordinates in the chromaticity diagram of the CIE1931 color system that are smaller than the values of X and Y coordinates at a color temperature of 5,500 K on the black body radiation locus.
Dependencies are inferred from the claim text.