Filament lighting apparatus and manufacturing method thereof
US10731798B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2018 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Jan 3, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A filament lighting apparatus includes a base, a pillar, multiple lamp strips, a fixed metal strip, a driving circuit and a lamp cap. The lower end of the pillar connects to the base. Each lamp strip has an upper end point and a lower end point. The upper end point of the lamp strip is electrically connected to the fixed metal strip. The fixed metal strip is disposed about an upper end of the pillar and the fixed metal strip doesn't directly contact the pillar. The lower end of at least two of the lamp strips are electrically connected to the driving circuit. The lamp cap accommodates the driving circuit and supports the base. The present invention discloses a method of manufacturing the filament lighting apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.