LED filament and LED light bulb comprising the same
US10487988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2017 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Feb 4, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED filament, including: a strip substrate having two ends, a plurality of LED chips, metal strip electrodes, and a plurality of electronic devices. The plurality of LED chips is disposed on the strip substrate and connected in series to form an LED light source. The metal strip electrodes are disposed on the two ends of the strip substrate. The plurality of electronic devices is disposed on the strip substrate in the vicinity of one end of the strip substrate or in the vicinity of two ends of the strip substrate. The metal strip electrodes are connected to the electronic devices and the LED light source via leads. The strip substrate, the LED light source, the electronic devices, and joints between the strip substrate and the metal strip electrodes are coated with fluorescent glue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.