Switchable smart film is a kind of film that when connect to power, it will become transparent, when power off, it will become opaque. And when in opaque status, it can work as a rear projection screen, which can help you to take any glass surface as projection screen if you already have smart film on the glass.
Rear projection theory:
![p1](http://blog.oypdlc.com/wp-content/uploads/2018/06/p1.jpg)
![p2](http://blog.oypdlc.com/wp-content/uploads/2018/06/p2.jpg)
Rear projection effects:
![p3](http://blog.oypdlc.com/wp-content/uploads/2018/06/p3.jpg)
Switchable smart film/glass projection, when in transparent status.
![p4](http://blog.oypdlc.com/wp-content/uploads/2018/06/p4.jpg)
Switchable smart film/glass projection, when in opaque status.
See another real project photos(Using 3 projectors for projection):
![p5](http://blog.oypdlc.com/wp-content/uploads/2018/06/p5.jpg)
![p6](http://blog.oypdlc.com/wp-content/uploads/2018/06/p6.jpg)
![p7](http://blog.oypdlc.com/wp-content/uploads/2018/06/p7.jpg)
![p8](http://blog.oypdlc.com/wp-content/uploads/2018/06/p8.jpg)
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