What kinds of news organizations tend to be big, have lots of writers and bureaus all over the map, use formal language with high standards of copy editing, and have been around long enough to have established reputations?
Applying an electric charge to the liquid crystals causes the molecules they are made up of to realign themselves, altering the transparency of that layer. (The screens of portable computers work in a similar way.) The result is that a high-resolution negative copy of the moving image is formed in the liquid-crystal layer.