LED filament lamps with white filament appearance
US10495263B2 · kind B2 · utility
6Cited by
6References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2018 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Mar 15, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L25/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An overcoated LED filament includes an LED filament comprising one or more LED dies coated with an underlying layer of a phosphor material exhibiting a colored appearance, and an over-coated layer comprising a resinous material loaded with a scattering agent that causes the LED filament to appear white.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.