Lighting device for semiconductor light emitting elements and illumination apparatus including same
US-9226353-B2 · Dec 29, 2015 · US
Light source circuitry for controlling the color of emitted light
US9504115B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9504115-B2 |
| Application number | US-201314400088-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 6, 2013 |
| Priority date | May 15, 2012 |
| Publication date | Nov 22, 2016 |
| Grant date | Nov 22, 2016 |
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Abstract
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Light source circuitry comprises a first group of one or more light emitting diodes operable to emit light of a first color, a second group of one or more light emitting diodes operable to emit light of a second color, and a third group of one or more light emitting diodes operable to emit light of a third color, wherein the first, second and third groups of light emitting diodes are arranged such that, when a fixed current arrives at the light source circuitry, the fixed current is shared between the first, second and third groups, and wherein the circuitry is configured such that a proportion of the fixed current that flows through each of the first and second groups is controllable in dependence on a received control signal and such that the remainder of the fixed current flows through the third group.
First claim
Opening claim text (preview).
The invention claimed is: 1. Light source circuitry comprising: a first group of one or more light emitting diodes configured to emit light of a first color; a second group of one or more light emitting diodes configured to emit light of a second color; a third group of one or more light emitting diodes configured to emit light of a third color, wherein the first, second and third groups of light emitting diodes are configured such that, when a fixed current arrives at the lig…
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Electricity · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US9504115B2 cover?
- Light source circuitry comprises a first group of one or more light emitting diodes operable to emit light of a first color, a second group of one or more light emitting diodes operable to emit light of a second color, and a third group of one or more light emitting diodes operable to emit light of a third color, wherein the first, second and third groups of light emitting diodes are arranged s…
- Who is the assignee on this patent?
- Koninklijke Philips Nv, Koninl Philips Electronics Nv
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0857. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 22 2016 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).