Tunable LED-filaments and tunable LED-filament lamps
US10950585B2 · kind B2 · utility
5Cited by
11References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 4, 2020 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Jun 4, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/882
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED-filament includes a light-transmissive substrate; a first array of LED chips on a front face of the substrate; a second array of LED chips on the front face of the substrate; a first photoluminescence arrangement covering the first array of LED chips; and a second photoluminescence arrangement covering the second array of LED chips; where the first array of LED chips and the first arrangement generate light of a first color temperature and the second array of LED chips and the second arrangement generate light of a second color temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.