Edson, what I know with large displays from my experience:
- do not multiplex them if working in direct sun ( even there are
superbright, because of small visibility angle the result will be pour )
-any segment support up to 35...40mA and the voltage depend by the led
numbers inside the segment
-if you plan an indoor product then you may multiplex and increase
the current up to 50% than continuous mode and choose a correct duty cycle
( the medium power on any segment must be keept under maximum ratings )
And just a remark: 4 inch = 10cm is a small display, I've built using 10mm
leds, displays up to 60cm.

regards, Vasile

On Thu, 14 Feb 2002, Edson Brusque wrote:

> Hello,
>
>     a client asked me to make a device with some big LED-7-Seg displays. I
> think the digit height is about 4 inches. How much current have I suply
> continuos in each segment? What voltages? And if I'm multiplexing (PWM) at
> 25% (duty)?
>
>     I know it's on the datasheets, but I can't find it clear on the
> datasheets. I just want the general figures or points to where can I find
> the correct infos.
>
>     Thank you very much,
>
>     Brusque
>
> -----------------------------------
> Edson Brusque
> Research and Development
> C.I.Tronics Lighting Designers Ltda
> Blumenau  -  SC  -  Brazil
> www.citronics.com.br
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