“You can leave a static image on an LCD display for weeks and there will be no memory of the image.”
That may be true, but we recently found out that if you leave a static image on for about 5 months, you actually can burn in the image. My co-worker did this with a Sony Bravia LCD TV (one that sits on his bench in the lab at work). The TV probably got turned on in May and didn’t have any inputs connected. It sat there displaying the “VIDEO 2” message the whole time. Finally, my co-worker needed to use the TV for a project and noticed the burn-in. It was a suprise to all of us.
Obviously, this is an extreme scenario that probably won’t happen at home. Unless you plan on torturing your TV in this way, I wouldn’t worry about burning in a LCD (edited).