Large angle illuminated LED filament light bulb
US10868227B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2019 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Oct 29, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8513
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED light bulb, comprising: a lamp housing, a bulb base, connected with the lamp housing; a stem with a stand extending to the center of the lamp housing, disposed in the lamp housing; a single flexible LED filament, disposed in the lamp housing, points of the flexible LED filament in an xyz coordinates are defined as X, Y, and Z, an x-y plane of the xyz coordinates is perpendicular to the height direction of the light bulb, a z-axis of xyz coordinates is parallel with the stem, the filament is bent into spiral in an axial direction, the diameter of the outer spiral coil of the filament is large than the diameter of the intermediate spiral coil of the LED filament in the YZ plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.