Retrofit LED lamp
US10314134B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2018 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Sep 19, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A retrofit lamp is for use with a fluorescence lighting ballast. The retrofit lamp comprises a filament emulation circuit. A detection circuit detects (at least) if a connected ballast is an instant start electronic ballast or an electromagnetic ballast by detecting a potentially existing heating voltage across the filament emulation circuit. In response, an LED arrangement may be connected in a series configuration (for an instant start electronic ballast) or in a parallel configuration (for an electromagnetic ballast). In this way, the output power is managed to ensure efficient operation. A different pin safety function may also be provided in the different configurations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.