You actually don't need a screen on any type.
You need a button and a LED next to it. And a paper sticker next to the button to indicate the party/candidate.
Simple electronic voting machine that is successfully used by the largest democracy in the world:-
http://en.wikipedia.org/wiki/Indian_voting_machines
btw, these machines are used in all sorts of conditions. In some remote places with no electricity.
Slashdot Mirror
You actually don't need a screen on any type. You need a button and a LED next to it. And a paper sticker next to the button to indicate the party/candidate.
Simple electronic voting machine that is successfully used by the largest democracy in the world :-
http://en.wikipedia.org/wiki/Indian_voting_machines
btw, these machines are used in all sorts of conditions. In some remote places with no electricity.