Bulb-type light source
US11073249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2020 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Mar 18, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10106
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bulb-type light source includes a globe transmitting a light and at least one light emitting device filament disposed in the globe. The light emitting device filament includes a substrate including n (n is a natural number equal to or greater than 2) flat portions and n−1 bendable portions disposed between the flat portions, a plurality of light emitting device chips disposed on the flat portions, a fluorescent substance layer covering each light emitting device chip and converting a wavelength of a light from each light emitting device chip, and a connection line disposed on the flat portions and electrically connecting the light emitting device chips adjacent to each other between the adjacent light emitting device chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.