The links below give a lot of info on LCDs. Rich is right on. It has to get down to -60 degrees for an extended period of time for things to really freeze up solid. The lower the temps the LCD unit may not have a fast response rate. From what I read there is not much to worry about freezing which is contrary to the Trailer Life Article.
When I bought a laptop a few years back and the salesman told me it would freeze if I left it in the car in the cold. He was trying to sell me an extended warranty also.
http://www.dciincorporated.com/products/overview.html
http://electronics.howstuffworks.com/lcd.htm/printable