TUNABLE WHITE POINT LIGHT SOURCE USING A WAVELENGTH CONVERTING ELEMENT
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United States of America Patent
Stats
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N/A
Issued Date -
N/A
app pub date -
Jan 28, 2011
filing date -
Dec 15, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
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Abstract
A uniform high brightness light source is provided using a plurality of light emitting diode (LED) chips with slightly different pump wavelengths with a wavelength converting element that includes at least two different wavelength converting materials that convert the light to different colors of light. The intensity of the light produced by the LED chips may be varied to provide a tunable CCT white point. The wavelength converting element may be, e.g., a stack or mixture of phosphor or luminescent ceramics. Moreover, the manufacturing process of the light source is simplified because the LED chips are all manufactured using the same technology eliminating the need to manufacture different types of chips.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| US | B2 | US7902560 | Dec 15, 2006 |
| KR | A | KR20090096627 | Dec 12, 2007 |
| BR | A2 | BRPI0720065 | Dec 12, 2007 |
| CN | A | CN102439721 | Dec 12, 2007 |
| WO | A1 | WO2008072196 | Dec 12, 2007 |
| CN | A | CN105428344 | Dec 12, 2007 |
| JP | A | JP2010514153 | Dec 12, 2007 |
| RU | C2 | RU2468472 | Dec 12, 2007 |
| EP | A1 | EP2102909 | Dec 12, 2007 |
| TW | B | TWI497744 | Dec 13, 2007 |
International Classification(s)
- 2011 Application Filing Year
- H05B Class
- 2393 Applications Filed
- 1754 Patents Issued To-Date
- 73.30 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 11 Citation Count
- H05B Class
- 62.87 % this patent is cited more than
- 14 Age