LED light bulb having filament with segmented light conversion layer
US11168844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2019 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Dec 20, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8513
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED filament light bulb, consisting of: a bulb shell doped with a golden yellow material or its surface coated with a yellow film; a bulb base connected to the bulb shell; a stem connected to the bulb base and located in the bulb shell, the stem comprises a stand extending to the center of the bulb shell; and a single filament, disposed in the light housing, further comprising a plurality of supporting arms, each of the supporting arms comprises a first end and a second end opposite to the first end of the supporting arms, the first end of each of the supporting arms is connected with the stand while the second end of each of the supporting arms is connected with the LED filament.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.