Quote:
Originally Posted by yvanleterrible
It does exist; LCD based. Cadillac had a proto of an automatic windshield that varies the opacity according to incoming light.
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Not just a proto. There were commercial models (other marks, Saab among them, i think, or Volvo) with LC-based window tinting. Also, a lot of cars today use LC's to auto-tint the central rear-view mirror when someone driving behind you hits it with high beams.
There were also some house windows mentioned installed somewhere (again, can't remember where
) and i recall reading about a prototype window containing both, a transparent photovoltaic layer and an LC layer, sandwiched between the glass panes.
On a side note, transparent e-paper could create some interesting new possibilities for user interfaces... Stacking sheets with annotation on sheets with content, for example (in a "dumb" way, like overhead transparencies, or with some imbued "intelligence", i.e. sheets "sensing" one another's content and position).