I've just seen an lcd monitor that is entirely transparent, so could, for instance be stuck to a window to use natural light in place of a backlight.
Showcased in the second half of this video
https://www.youtube.com/watch?v=E5d7ynJXiZc
Its got me thinking, could I just tear the back off a normal monitor and use it against a window? I guess it will depend on the internal structure of the monitor - might give it a try this evening.