Article View: sci.electronics
Article #6225Re: Re: RGB leds - they're need but who makes them
From: Bob Myers
Date: Thu, 13 Aug 1992 20:24
Date: Thu, 13 Aug 1992 20:24
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> > I recently got a LEDTRONICS catalog listing an rgb led that when
> >connected properly will produce a white light...
>
> Do bear in mind that you're not going to get an awful lot of white
> light out of it, because today's blue LEDs are not very bright.
> --
The blue part doesn't have to be as bright as the red and green - the usual
mix of green, red, and blue to produce white is approximately 60/30/10%,
respectively. In other words, the blue LED can be 1/6 as bright as the green
and 1/3 as bright as the red, and still get acceptable white. (Unfortunately,
the brightest LEDs around are red, not green, but you can always turn the
red down a bit....)
Bob Myers KC0EW Hewlett-Packard Co. |Opinions expressed here are not
User Interface Tech. Div.|those of my employer or any other
myers@fc.hp.com Fort Collins, Colorado |sentient life-form on this planet.
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From: myers@hpfcso.FC.HP.COM (Bob Myers) Date: Thu, 13 Aug 1992 20:24:42 GMT Subject: Re: Re: RGB leds - they're need but who makes them Message-ID: <7480108@hpfcso.FC.HP.COM> Organization: Hewlett-Packard, Fort Collins, CO, USA Path: arc1-ca.pugleaf.net!sparky!uunet!europa.asd.contel.com!darwin.sura.net!mips!sdd.hp.com!hpscdc!hplextra!hpfcso!myers Newsgroups: sci.electronics References: <BsqItt.uo@zoo.toronto.edu> Lines: 18