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A comment on How to Convert a Digital Watch to a Negative Display. Parent comment

Re:How to Convert a Digital Watch to a Negative Display by Cthulhu_ on Tuesday April 22, 2014 @04:23AM (#7626415)
They probably have the same effect as an LCD with a very narrow viewing angle. Modern displays have a pretty high viewing angle; older ones start to change color and become illegible when viewed at an angle. I've seen the same thing on ATMs and the like.
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