Driver circuit
US-2015381172-A1 · Dec 31, 2015 · US
Method for driving a light-emitting unit and circuit therefor
US9220137B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9220137-B2 |
| Application number | US-201414194811-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 2, 2014 |
| Priority date | Oct 31, 2008 |
| Publication date | Dec 22, 2015 |
| Grant date | Dec 22, 2015 |
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Abstract
Official abstract text for this publication.
A driver circuit is provided which comprises a series-connected unit having a light-emitting element and a current limiting inductor directly connected to the light-emitting element, a regenerative diode which is connected in parallel to the series-connected unit and which regenerates energy stored in the current limiting inductor, a transistor which controls a current flowing through the light-emitting element and the current limiting inductor, and a controller which controls an operation of the transistor, wherein the controller controls the transistor according to a voltage value of a power supply applied to the light-emitting element.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for driving a light emitting unit, comprising: providing the light emitting unit and a switching element, the light emitting unit having an input and an output, wherein the input comprises an anode of a light emitting diode and the output comprises a terminal of a first inductor, and the switching element coupled to the output of the light emitting unit; providing a switching element having a control terminal and first and second conducting termin…
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Classifications
Electricity · mapped topic
Electricity · mapped topic
- H01S5/042Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9220137B2 cover?
- A driver circuit is provided which comprises a series-connected unit having a light-emitting element and a current limiting inductor directly connected to the light-emitting element, a regenerative diode which is connected in parallel to the series-connected unit and which regenerates energy stored in the current limiting inductor, a transistor which controls a current flowing through the light…
- Who is the assignee on this patent?
- Semiconductor Components Ind
- What technology area does this patent fall under?
- Primary CPC classification H01S5/042. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 22 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).