Semiconductor light emitting devices including red phosphors that exhibit good color rendering properties and related red phosphors
US-9219202-B2 · Dec 22, 2015 · US
Phosphor and LEDs containing same
US8928019B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8928019-B2 |
| Application number | US-201113583504-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 30, 2011 |
| Priority date | Mar 31, 2010 |
| Publication date | Jan 6, 2015 |
| Grant date | Jan 6, 2015 |
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Abstract
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There is herein described a phosphor for use in LED applications and particularly in phosphor-conversion LEDs (pc-LEDs). The phosphor has a composition represented by (Y 1-x Ce x ) 3 (Al 1-y Sc y ) 5 O 12 wherein 0<x≦0.04 and 0<y≦0.6 and can be as applied to an LED as a transparent sintered ceramic or used in a powder form. By adjusting the composition of the phosphor, the phosphor can be made to emit light in the green to yellow regions of the visible spectrum upon excitation by a blue-emitting InGaN LED.
First claim
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I claim: 1. A phosphor having a composition represented by (Y 1-x Ce x ) 3 (Al 1-y Sc y ) 5 O 12 wherein 0<x≦0.002 and 0.2<y≦0.6. 2. The phosphor of claim 1 wherein the phosphor when excited emits light having color coordinates Cx and Cy wherein C x is in a range from about 0.35 to about 0.44 and C y is in a range from about 0.55 to about 0.58. 3. A phosphor-conversion LED comprising: an LED that emits a blue light and a phosphor for con…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8928019B2 cover?
- There is herein described a phosphor for use in LED applications and particularly in phosphor-conversion LEDs (pc-LEDs). The phosphor has a composition represented by (Y 1-x Ce x ) 3 (Al 1-y Sc y ) 5 O 12 wherein 0<x≦0.04 and 0<y≦0.6 and can be as applied to an LED as a transparent sintered ceramic or used in a powder form. By adjusting the composition of the phosphor, the phosphor can be made…
- Who is the assignee on this patent?
- Zheng Yi, Osram Sylvania Inc
- What technology area does this patent fall under?
- Primary CPC classification C09K11/7774. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 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).