HIGH LUMEN DENSITY TECHNOLOGY

BY YUJI LED

MORE THAN JUST SMALL


HIGH RELIABILITY

 
HIGH CRI

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WHY SMALL LIGHT EMITTING SURFACE (LES)?


  • Smaller LES helps save cost on secondary optics design and accessory manufacturing.

  • Smaller LES means smaller size of the fixture, less BOM cost, higher mobility and higher portability.


EXCELLENT PERFORMANCE


HIGH CRI
High Lumen Density COB CRI Values (95 CRI)



With reliable phosphor properties, appropriate mixing ratio and the unique packaging process technology, this COB has a CRI (Ra) as high as 95 even at a CCT of 5600 K.
World's highest lumen density




The 19 mm LES COB has a luminous flux of 24000 lm at 5600 K, which is a luminous flux density of 84 lm/mm2. That is 55 lm/mm2 higher than the average on the market.
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High Reliability



The maintenance rate of the initial lumen flux of the high lumen density COB at 12 A drive current is more than 98% after 9000 hours continuous light up.

Small color shift



The high lumen density COB shows a color temperature shift smaller than +/-50K after 9000 h and the chromaticity shift from black body curve is less than +/-0.001.
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HOW IS HIGH RELIABILITY POSSIBLE?


The culprit of reliability decay: HEAT



  • The flip-chip structure of the COB transfers the heat directly to the substrate, so the efficiency can be largely increased.

  • The AlN substrate of the COB has a heat transfer efficiency as high as about 300 W/(m-K), 2 times that of Al substrate, and 6 times that of Al2O3 substrate.

APPLICATIONS OF HIGH LUMEN DENSITY COB


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CONTACT

1250 Oakmead Parkway Suite 210
Sunnyvale, CA 94085 USA
TEL:+1-612-666-YUJI


Room 1502, Building No.6
Jia No.2 North Xisanhuan Road
100081, Beijing, China
TEL:+86-10-6829-0301
E-mail:info@yujigroup.com