Lighting apparatus a pi-filter and non-isolated switch driving circuit and a base comprising a metal connector
US11147137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2020 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Jan 27, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A LED lighting apparatus has a circuit board and a base. The base is a hollow structure. The base with lateral wall has a conducting element. The circuit board is in the base and has a LED power driving circuit and a LED source. The LED power driving circuit has a full-bridge rectification. A π-filter circuit and a non-isolated switch driving circuit connected in order. An output terminal of the non-isolated switch driving circuit is connected with the LED source. The full-bridge rectification, the π-filter circuit and the non-isolated switch driving circuit are common grounded to form a power ground. The power ground is electronically connected with the conducting element in order to reduce the interference of an electromagnetic energy generated by the high-frequency switch signal to other appliances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.