Lighting-emitting device filament
US10957675B2 · kind B2 · utility
4Cited by
0References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2020 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Mar 19, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device filament includes a substrate having a first surface and a second surface opposite to the first surface and extending in one direction, at least one light emitting device chip disposed on the first surface, and an auxiliary pattern disposed on the second surface and disposed at a position corresponding to the light emitting device chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.