LED filament and light bulb using LED filament
US12200839B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Sep 29, 2022 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Sep 29, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This application relates to the field of lighting, and discloses an LED filament. The LED filament includes an LED chip unit, a light conversion layer, and an electrode. The light conversion layer covers the LED chip unit and part of the electrode, and a color of a light emitted by the LED filament after lighting is different from a color of the light conversion layer. This application has the characteristics of uniform light emission and good heat dissipation effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.