Solid-state lighting apparatus and methods using energy storage with segment control
US9131571B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Jan 15, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting apparatus includes a rectifier circuit configured to be coupled to an AC source and to produce a rectified voltage from an AC voltage and a string including at least two serially-connected LED segments and coupled to the rectifier circuit. A segment control circuit is configured to selectively bypass at least one segment of the string responsive to the rectified voltage. An energy storage circuit is coupled to the rectifier circuit and controls current flow between at least one energy storage device and the string. A control circuit controls the segment control circuit and the energy storage circuit. The segment control circuit may support a current from the rectifier circuit through all of the segments in the string circuit at a peak of the rectified voltage and the energy storage circuit may charge the at least one energy storage device to a voltage near the peak of the rectified voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.