17 Dec
2004
17 Dec
'04
3:23 p.m.
Are you sure it's a LED display? That sounds more
like behavior I would
expect of a vacuum fluorescent display. If an LED really is doing that,
the problem is with the electronics, not the diplay.
I can't be sure. I didn't think it was an LED (the unit is from around
1970 or so), but when I looked at it a little while ago, it looked kind
of like LED segments behind the plastic lens.
They glow a bluish green if that is any help. They don't look like any
LED out today, that's for sure. I've never knowingly seen a vacuum
fluorescent display, so I can't compare.
If this is one, is it a problem that is fixable?
-chris
<http://www.mythtech.net>
17 Dec
17 Dec
3:53 p.m.
> Are you sure it's a LED display? That sounds
more like behavior I
> would expect of a vacuum fluorescent display. If an LED really is
> doing that, the problem is with the electronics, not the diplay.
I can't be sure. I didn't think it was an LED
(the unit is from
around 1970 or so), but when I looked at it a little while ago, it
looked kind of like LED segments behind the plastic lens.
They glow a bluish green if that is any help.
That is almost certainly vacuum fluorescent. There are a lot of such
displays that use the same kind of seven-segment number formation you
commonly see with LEDs.
There may exist, today, LEDs that produce blue-green light. I'm fairly
sure there weren't any in mass-market consumer electronics (even fairly
specialized devices) back around 1970 - quite likely not any at all
back then.
Not that that helps much with your question, since I am not competent
to comment on fixing either kind of display. But it may help to know
what you're dealing with.
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