Lighting device for semiconductor light emitting elements and illumination apparatus including same
US-9226353-B2 · Dec 29, 2015 · US
Light emitting diode illumination apparatus and control method thereof
US9155147B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9155147-B2 |
| Application number | US-201414193476-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 28, 2014 |
| Priority date | Feb 28, 2013 |
| Publication date | Oct 6, 2015 |
| Grant date | Oct 6, 2015 |
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Abstract
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Disclosed are a light emitting diode illumination apparatus and a control method thereof. The light emitting diode illumination apparatus includes a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage, and a control circuit that selectively provides current paths according to a change in a level of the rectified voltage through a plurality of switching circuits connected to the light emitting diode channels, and controls pulse widths of control pulses provided to the switching circuits such that an current supplied to the light source of each channel follows a waveform of the rectified voltage.
First claim
Opening claim text (preview).
What is claimed is: 1. A light emitting diode illumination apparatus comprising: a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage; and a control circuit that selectively provides current paths according to a change in a level of the rectified voltage through a plurality of switching circuits connected to the light emitti…
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Cross-Sectional Technologies · mapped topic
- H05B33/0818Primary
Electricity · mapped topic
- H05B45/3725Primary
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US9155147B2 cover?
- Disclosed are a light emitting diode illumination apparatus and a control method thereof. The light emitting diode illumination apparatus includes a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage, and a control circuit that selectively …
- Who is the assignee on this patent?
- Silicon Works Co Ltd
- 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 Oct 06 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).