Laptops, CCD'ing, & Star Parties

Last year at Stellafane a friend & I found that our CCD'ing laptop was
annoying nearby visual observers. I would think that "star party etiquette"
would have to be that bright laptops are not acceptable.

So: How does one use a laptop or other PC at a star party or popular
observing site? Anybody have suggestions on how to cut the screen light down
to levels acceptable for visual observers? Keep it under a box?

George Normandin