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Posted by almo on July 3, 2006, 10:38 am
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I saw something cool in a magazine, however, I didn't have a use for it
at the time, but now I do, and I need some of that stuff, but can't
remember where I saw it.
It was some kind of clear plastic, flexible, I think it needed a
battery although I'm not sure, and, as advertised, it would create
multi-colored patterns. And, it didn't strike me as having an array of
LEDs, but more like a polymer, and, yes, I know there is something
called "organic LED material," but that's probably too expensive.
Anyway, I want to know if anyone has seen that advertisement, or has a
clue as to what it was, regarding some inexpensive plastic material,
like a sheet of it, that could produce multicolored effects.
Multicolored, as in, more complicated than just a red, a white, and a
blue LED, although, I didn't look at it long enough to say for sure.
And, I wouldn't call it a fiber optic material, but definitely
something like that. I think the ad showed it being used on a bicycle
wheel, or at least mentioned that you could use it for that, and it
could flash different colors, simultaneously, and randomly. Also, the
magazines I usually read are Nuts and Volts, Circuit Cellar, or maybe a
Jameco catalog, hobby/robotics, or PC related stuff, but I've retraced
my steps and haven't been able to find that little advertisement again.
It wasn't a full page ad, like 1/4 page or 1/8 page.
If anybody happened to see that ad, or has a clue as to what that stuff
was, please let me know. I just set up an email address just for this
question, and it should be active shortly, and it's -> el_roboto_loco
at yahoo dot com. And, just to make doubly sure, you can also reach me
as almo6914 so, please CC: almoREMOVETHIS6914@yahoo.com
Thanks,
Alan
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Posted by Sir Charles W. Shults III on July 3, 2006, 12:19 pm
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This is probably electrochromic plastic. There were many such materials
generated in the late '80s and early '90s but they really did not catch on.
There were electrochromic ceramics that were made into displays that could
remember what was displayed even when power was removed, and they could be
made literally on a ceramic tile with no visible signs.
There were also various liquid crystals stuck in plastics with
conductive clear electrodes on plastic and the only drawbacks were their
temperature sensitivities. There were thermochromic plastics (and still
are) and some materials show the effect unintentionally.
Try a scrap of red Teflon wire insulation- heat it up to about 200 C and
it darkens, but not permanently. A sensitive photodevice could in theory
use this as a temperature sensor.
It seemed then that the paints and dyes would not be far behind, but
very little of this ever made it into the market. I would really like a
paint on my car that could change color on demand by the application of a
small current.
Cheers!
Sir Charles W. Shults III, K. B. B.
Xenotech Research
321-206-1840
> I saw something cool in a magazine, however, I didn't have a use for it
> at the time, but now I do, and I need some of that stuff, but can't
> remember where I saw it.
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Posted by Jeff L on July 3, 2006, 12:51 pm
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> It seemed then that the paints and dyes would not be far behind, but
> very little of this ever made it into the market. I would really like a
> paint on my car that could change color on demand by the application of a
> small current.
>
I saw a ad / info-panel for car paint that did exactly that. It was years
ago, but it could have been a mag such as popular science.
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Posted by Zak on July 3, 2006, 2:49 pm
Please log in for more thread options Jeff L wrote:
>> It seemed then that the paints and dyes would not be far behind, but
>> very little of this ever made it into the market. I would really like a
>> paint on my car that could change color on demand by the application of a
>> small current.
>
> I saw a ad / info-panel for car paint that did exactly that. It was years
> ago, but it could have been a mag such as popular science.
I guess it was not that real because it would make a nice display
technology for huge screens. Didn't happen...
Thomas
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Posted by Sir Charles W. Shults III on July 4, 2006, 5:24 am
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> I guess it was not that real because it would make a nice display
> technology for huge screens. Didn't happen...
>
>
> Thomas
But that is for other reasons- the need to print the fine electrodes
beneath in a grid that can be scanned, for instance. Paint on a vehicle is
actually much simpler as you need only the base metal to be grounded and a
clear, conductive polymer layer on the outside.
For a decent display, the issues become the fine electrode pattern
above, and the rotated electrode pattern below. Oh yes, and the connectors,
the drivers, the control electronics, a protective outer coating...
Cheers!
Sir Charles W. Shults III, K. B. B.
Xenotech Research
321-206-1840
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> at the time, but now I do, and I need some of that stuff, but can't
> remember where I saw it.