Lighting device and lighting fixture for current control with a solid-state lighting element
US9743471B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Jun 10, 2016 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Jun 10, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting device which outputs a DC current to a load, the lighting device including: a downconverter circuit which includes a switching element and steps down a DC voltage input to the downconverter circuit; and a controller which controls turning on and off of the switching element, wherein the controller has operating modes including a detection mode in which the controller detects a time taken for a current through the switching element to reach a predetermined value after the switching element turns on, the current through the switching element representing the DC current output to the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.