Apparatus and method for schedule based operation of a luminaire
US-2015077019-A1 · Mar 19, 2015 · US
Solid state lighting, drive circuit and method of driving same
US9210751B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9210751-B2 |
| Application number | US-201313875000-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 1, 2013 |
| Priority date | May 1, 2012 |
| Publication date | Dec 8, 2015 |
| Grant date | Dec 8, 2015 |
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Abstract
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A power converter output stage provides acceptable current matching between sets or strings of solid state light sources (e.g., LEDs) with different forward voltages, and protects the sets or strings from excessive over-current in the case of a light source failing as a short. The sets or strings are electrically coupled across respective inductors of a secondary of a transformer, the sets or strings not electrically in parallel with one another. The secondary of the transformer essentially self balances. The embodiments described employ an LLC resonator converter topology, but could be implemented as part of a Flyback, LLC resonator or other switch mode topology.
First claim
Opening claim text (preview).
The invention claimed is: 1. A system for solid state lighting, comprising: a transformer having a primary side and a secondary side, the primary side including at least a first primary inductor, the secondary side including at least a pair of secondary inductors, each of the secondary inductors having a respective node that provides current to a respective one of a pair of strings of solid state light sources and not the other one of the pair of strings of solid state light sourc…
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Classifications
- H05B33/0818Primary
Electricity · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
- H05B45/3725Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9210751B2 cover?
- A power converter output stage provides acceptable current matching between sets or strings of solid state light sources (e.g., LEDs) with different forward voltages, and protects the sets or strings from excessive over-current in the case of a light source failing as a short. The sets or strings are electrically coupled across respective inductors of a secondary of a transformer, the sets or s…
- Who is the assignee on this patent?
- Express Imaging Systems Llc
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0818. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 08 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).