Am 01.08.2012 15:23, schrieb Le_Forgeron:
> Le 01/08/2012 14:26, Invisible a écrit :
>> suggests that there's no such thing. Now I wonder... Are there any
>> devices which actually use LEDs for display? Or are all the devices
>> which I thought were LEDs actually VFDs?
>
> A Led is a small spot, with a small emitting cone, about 15° to 25°.
> If the form was bigger that a point, it was not a Led.

Because an LED embedded in some piece of transparent plastic with a 
frosted surface isn't an LED, or what?

For both of you:

http://en.wikipedia.org/wiki/Seven-segment_display

And yes, the LED version /does/ exist in reality. Some mainboards have a 
pair of them to display BIOS POST failure codes or some such, for 
instance. You also see them frequently in pinball machines, dart 
automats or the like (unless they feature an LCD screen) for score 
display. It's pretty common where you want a bright, viewing 
angle-independent numeric display.

It's less common however where you want a low power consumption, such as 
any device that is supposed to display anything in standby mode, or any 
device that is supposed to operate from batteries. LCD and vacuum 
fluorescent tubes are preferred there.

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