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Technology Stocks : White light from LED
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To: John Finley who wrote (97)12/7/1999 9:50:00 AM
From: kinkblot  Read Replies (1) of 565
 
Specs, Cree & Nichia blue chips

Cree specifies Radiant Flux of 3.5 mW for their 450nm Deep Blue and 2.5 mW for their 470nm Sign Blue Super Bright LEDs:
cree.com

Nichia specifies Optical Output Power of 4.0 mW for their Chip-Type LED NSCB (Blue) Series:
www1a.mesh.ne.jp

Both at Ta=25°C, If=20mA DC forward current

Nichia gives Chromaticity Coordinates of x=0.130, y=0.075 z=0.795 (CIE)
From the CIE 1964 table, I'd say 465nm is close enough:
www-cvrl.ucsd.edu

Perhaps Cree has achieved higher brightness in the lab; I'm sure Nichia isn't standing still, either.

WT
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