Light-emitting device
US11641009B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Jun 12, 2019 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | Jun 12, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/11
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A light-emitting device including a solid-state light source that emits light having a peak wavelength in the range of 480 nm or less and a fluorescent film that covers the solid-state light source and includes at least one kind of phosphor, wherein the fluorescent film includes at least one kind of near-infrared phosphor that is excited by light from the solid-state light source, has a peak wavelength in the range exceeding 700 nm, and has an emission spectrum with a full width at half maximum of 100 nm or more in a range including the peak wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.