A new LCD product, 3G Switchable Projection Screen/Film, can be switched between opaque and clear by a safe voltage under 36V AC.
In its opaque state, it can be perfectly used as a projection screen that is viewable from both sides. It is very good for advertising on store windows.
To see detail, please visit www.scienstry.us or click following link to Switchable Projection Screen/Film: www.scienstry.us