Structure to reduce chip shift during assembly
US-2024395758-A1 · Nov 28, 2024 · US
LED assembly
US8957439B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8957439-B2 |
| Application number | US-200913131384-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 27, 2009 |
| Priority date | Dec 2, 2008 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A light emission diode (LED) assembly, comprising a LED die ( 10 ), a phosphor layer ( 12 ), and a filter layer ( 14 ), wherein said filter layer ( 14 ) is developed in such a manner that light rays with a wavelength of about 400 nm to 500 nm, preferably of about 420 nm to 490 nm, emitted from the LED die ( 10 ) are at least partially reflected depending on their emission angle to the normal on the filter layer ( 14 ). With the inventive LED assembly it is possible to provide a LED assembly which solves the yellow ring problem without a reduction of the efficiency of the LED assembly.
First claim
Opening claim text (preview).
The invention claimed is: 1. An LED assembly, comprising: a LED die, a phosphor layer, and a filter layer, wherein the filter layer is developed in such a manner that light rays with a wavelength of about 400 nm to 500 nm emitted from the LED die are at least partially reflected depending on their emission angle to normal on the filter layer, wherein light at an emission angle near the normal is reflected more than light at an emission angle far from the normal.…
Assignees
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Classifications
- H10W72/30Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H10H20/851Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8957439B2 cover?
- A light emission diode (LED) assembly, comprising a LED die ( 10 ), a phosphor layer ( 12 ), and a filter layer ( 14 ), wherein said filter layer ( 14 ) is developed in such a manner that light rays with a wavelength of about 400 nm to 500 nm, preferably of about 420 nm to 490 nm, emitted from the LED die ( 10 ) are at least partially reflected depending on their emission angle to the normal on…
- Who is the assignee on this patent?
- Bechtel Hans-Helmut, Heidemann Matthias, Schmidt Peter J, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H10W72/30. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 17 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).