Solid state lighting apparatuses and related methods
US8970131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2013 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Feb 15, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Solid state lighting apparatuses are adapted to operate with alternating current (AC) received directly from an AC power source. An exemplary apparatus includes a substrate and multiple sets of one or more solid state light emitters disposed over the substrate. Multiple sets of solid state light emitters are configured to be activated and/or deactivated at different times relevant to one another during portions of an AC cycle, and optionally have different duty cycles. Emitter configurations, color combinations, and/or circuit components reduce perceivable flicker, color shifts, and/or spatial variations in luminous flux. Color temperature and/or beam pattern are adjustable. Multiple emitters are arranged along non-coplanar substrate portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.