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US11098246B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11098246-B2 |
| Application number | US-201916294651-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 6, 2019 |
| Priority date | Mar 15, 2013 |
| Publication date | Aug 24, 2021 |
| Grant date | Aug 24, 2021 |
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Abstract
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A lighting apparatus includes a semiconductor light source in direct contact with a polymer composite comprising a color stable Mn4+ doped phosphor, wherein the lighting apparatus has a color shift of ≤1.5 MacAdam ellipses after operating for at least 2,000 hour at a LED current density greater than 2 A/cm2, a LED wall-plug efficiency greater than 40%, and a board temperature greater than 25° C.
First claim
Opening claim text (preview).
The invention claimed is: 1. A lighting apparatus comprising a semiconductor light source in direct contact with a polymer composite comprising a color stable Mn 4+ doped phosphor, wherein the lighting apparatus has a color shift of ≤1.5 MacAdam ellipses after operating for at least 2,000 hours at a LED current density greater than 2 A/cm 2 , a LED wall-plug efficiency greater than 40%, and a board temperature greater than 25° C. wherein the color stable Mn 4+ doped phosphor is annealed K 2 SiF 6 :Mn 4+ . 2. A lighting apparatus according to claim 1 , wherein the MacAdam ellipse color shift is ≤1.
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Wavelength conversion materials · CPC title
Silicon-containing compounds · CPC title
- C09K11/617Primary
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- What does patent US11098246B2 cover?
- A lighting apparatus includes a semiconductor light source in direct contact with a polymer composite comprising a color stable Mn4+ doped phosphor, wherein the lighting apparatus has a color shift of ≤1.5 MacAdam ellipses after operating for at least 2,000 hour at a LED current density greater than 2 A/cm2, a LED wall-plug efficiency greater than 40%, and a board temperature greater than 25° C.
- Who is the assignee on this patent?
- Current Lighting Solutions Llc
- What technology area does this patent fall under?
- Primary CPC classification C09K11/617. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 24 2021 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).