What is smart window glass?
Glass is an important discovery of human beings. Without it, our buildings would be dark, cold, and damp. But glass also has some drawbacks also. A normal glass lets in light and heat even when you don’t want it to. On a hot summer day, more solar heat comes inside the building and you will need to use your air-conditioning system more. That increases your electricity bills and also it is waste of energy that harms environment too. Because of this most of the building windows are fitted with curtains. Using curtains seems a technological kludge. Even after using it, glass is transparent and you don’t want it to be.
Since the beginning of the 20th century, people had many electronic automated instruments for homes and buildings like washing machines, vacuum cleaners, refrigerators, and more. So, why should not use electric glass or smart window glass that can change from clear to opaque automatically? Smart window glass uses a scientific idea called electrochromism, in which material changes color (transparent to opaque) when the electric voltage is applied across it. Typically when you remove the applied electric voltage glass color becomes normal (opaque to transparent).