How many generations of smart glass are there in the market?

Usually, there is a big difference between generations of a product. It is better to understand the major differences among generations of smart glass before selecting a product.|||There are three generations of smart glass in the market. Generations of smart glass are determined by manufacturing technologies of liquid crystal switchable film. In the industry, independent principle patented technologies are usually used to classify generations of products. For over three decades, there are only three independent patents in the field of liquid crystal switchable film. First generation (1980, US Patent 4435047, patent expired) utilizes water soluble polyvinyl alcohol emulsion to disperse LC (liquid crystal) droplets, or emulsion technology or NCAP technology. Second generation (1984, US Patent 4688900, patent expired) utilizes epoxy to disperse LC droplets, or PDLC technology. Third generation (1994, US Patent 5270843, still in force) utilizes a non-linear polymer system to disperse LC droplets, or NPD-LCD technology. Both 1G and 2G films invented over quarter of century ago have similar features, and 1G film must be laminated into glasses to prevent absorption of moisture from air. 3G Film has great improvements in all classic features, like ultra clear, lower driving voltage, super moisture and UV resistance and extremely long lifetime, and also has many new features, like front and rear projection, VAI brightness and super light diffusion functions. Actually, crystal clear transparency of 3G Switchable Film/Glass can be also recognized by published videos. In thirty years, smart glass seams only for small projects, but defect-free reliability of 3G Switchable Film has opened a door to world-class or million dollars projects as well as many new designs/applications. You can visit www.scientry.net for detail.|||1