Methods and apparatus for controlling the current supplied to light emitting diodes
US11812525B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2018 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Jun 26, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for controlling current to an LED light source in a lighting device are described. In some embodiments, a warm dim light output is achieved. In an exemplary embodiment, a light emitting diode (LED) circuit includes two or more circuit branches coupled in parallel across a two terminal direct current (DC) voltage input including a positive input terminal and a negative input terminal; each of the two or more circuit branches including a set of light emitting diodes, each of said set of light emitting diodes including at least one light emitting diode; and at least one of said circuit branches including a current control circuit that controls the current passing through each of said two or more circuit branches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.