Light emitting device
US11685306B2 · kind B2 · utility
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20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2022 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Jan 25, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device including a lighting unit and a conversion material is disclosed. The conversion material is configured to convert a part of the invisible light emitted from the lighting unit into a visible light, which indicates that the lighting unit is in operation. The spectral energy of visible light is less than 20% of the spectral energy measured within a wavelength range of 200 nm to 380 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.