Hi, is it possible to control more than one display on one controller and, if yes, how to do it?
Thanks in advance!
Yes, why would it be limited?
How depends on the display and the library you use.
If you mean more than one piece of 'glass' with a single HD44780 controller then I don't think so.
If you mean more than one LCD module with a single Arduino controller then yes. Look here: --> http://forum.arduino.cc/index.php/topic,5014.0.html
Don
It´s possible: different controller and lib´s
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On Mega yes, with some limitations on speed
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Much better on arduino Due
SmartGPU2 3.5" and ILI9325C 2.8" on arduino Due
SmartGPU2 3.5" and ILI9341 2.4" on arduino Due
@Don - I mean more than one LCD module with a single Arduino Controller. Thank you for the link. Also thanks to all of you who answered on my question. Now I'm gonna do some work 
Can this be done with IIC serial displays? For example, with these:
http://www.ebay.com/itm/171058695325?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Thank you!
metheoneandonly:
Can this be done with IIC serial displays?
That will depend on whether or not the display as an adjustable I2C address, I think. You'll need to check the datasheet of the device.
I, for example, have one of these, which has a fixed I2C address, alas.
OK, thank you very much. I'll check the datasheet.