Light emitting device
By combining different light-emitting elements and phosphors, the light-emitting device adjusts the correlated color temperature within the range of 1500K to 6500K, solving the problems of insufficient circadian rhythm and color rendering in existing technologies. It achieves a high color rendering index and excellent circadian rhythm response, meets WELL certification, and improves the lighting effect.
CN113871376BActive Publication Date: 2026-07-24NICHIA CORP
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NICHIA CORP
- Filing Date
- 2021-06-30
- Publication Date
- 2026-07-24
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Figure CN113871376B_ABST
Abstract
The present application provides a light emitting device, which is a light emitting device that takes into account circadian rhythm and color rendering. The light emitting device of the present application has one or more light emitting elements and a plurality of phosphors, and emits first light, second light, and third light generated by the one or more light emitting elements and the one or more phosphors, the first light having a correlated color temperature of 1500 K or more and 3500 K or less and a color rendering index R9 value of 50 or more, the second light having a correlated color temperature of 3500 K or more and 5500 K or less and a color rendering index R9 value of 50 or more, and the third light having X and Y coordinates in a chromaticity diagram of the CIE 1931 colorimetric system that are smaller than the X and Y coordinates at a color temperature of 5500 K on a black body radiation locus. In addition, in light having a correlated color temperature of 6500 K, the color rendering index R9 value is 50 or more, and the melatonin illuminance ratio value is 1.0 or more.
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