Smartglassontario technology uses Polymer Dispersed Liquid Crystals (PDLC) and the way the Electrochromic Smart Glass works is that without the electricity the liquid crystal molecules are disordered hence making the film opaque, once the power is on the liquid crystals become parallel making the film transparent. With a dimmer you can even control the degree of transparency that you desire. Smartglassontario offers an eco-friendly technology reducing your energy costs and stopping up to 98% of UV rays and several other benefits and it fabricates the smart film in Bradford, Ontario.
Here is the PDLC Smart film that shows all components.