Wow! Congratulations on finding this advertisement. Since St. Gobain was formerly a licensee, do you think their privacy glass is based upon the REFR film? The description of the product and how it works describes the use of a liquid crystal film that disperses light and then lets it through. It sounds exactly like REFR film. What do you think? If it is not REFR film, then I would assume that there will be one heck of a patent battle. Also, how long has St. Gobain had this product and this ad? Has anyone called them to find out if this is REFR film?
>>It sounds exactly like REFR film<< No, it doesn't. Sorry. This is no SPD film but a different animal. Check the site again and have fun switching the photos on and off. What do you see? These windows don't darken! Clear to translucent, not light to dark.
The concept of smart windows is neat even in Liquid Crystal windows. I saw a LC window in the movie True Lies with Arnold Swartzenegar. It was at a super high-tech office of a spy organization. I guess James Cameron thinks they're neat and futuristic. The question is what technology is better for most applications LC or SPD? LC disperses light SPD blocks it. When LC is in privacy mode you can't see squat through it while at the same time it is not reducing the amount of light coming in to a large degree. So I would imagine that if the sun is too bright you would have to turn your LC window to the clear mode and still have a venetian blind to see outside. A ventian blind often blocks 50% up to 100% of the outside view. An SPD window will enable a person to dim the intense sunlight coming at you and still enable you to see objects outside, LC doesn't. That is a killer difference.